2 * TCC - Tiny C Compiler
4 * Copyright (c) 2001-2004 Fabrice Bellard
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2 of the License, or (at your option) any later version.
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23 /********************************************************/
24 /* global variables */
26 /* loc : local variable index
27 ind : output code index
29 anon_sym: anonymous symbol index
31 ST_DATA
int rsym
, anon_sym
, ind
, loc
;
33 ST_DATA Sym
*sym_free_first
;
34 ST_DATA
void **sym_pools
;
35 ST_DATA
int nb_sym_pools
;
37 ST_DATA Sym
*global_stack
;
38 ST_DATA Sym
*local_stack
;
39 ST_DATA Sym
*define_stack
;
40 ST_DATA Sym
*global_label_stack
;
41 ST_DATA Sym
*local_label_stack
;
42 static int local_scope
;
44 static int section_sym
;
46 ST_DATA
int vlas_in_scope
; /* number of VLAs that are currently in scope */
47 ST_DATA
int vla_sp_root_loc
; /* vla_sp_loc for SP before any VLAs were pushed */
48 ST_DATA
int vla_sp_loc
; /* Pointer to variable holding location to store stack pointer on the stack when modifying stack pointer */
50 ST_DATA SValue __vstack
[1+VSTACK_SIZE
], *vtop
, *pvtop
;
52 ST_DATA
int const_wanted
; /* true if constant wanted */
53 ST_DATA
int nocode_wanted
; /* true if no code generation wanted for an expression */
54 ST_DATA
int global_expr
; /* true if compound literals must be allocated globally (used during initializers parsing */
55 ST_DATA CType func_vt
; /* current function return type (used by return instruction) */
56 ST_DATA
int func_var
; /* true if current function is variadic (used by return instruction) */
58 ST_DATA
int last_line_num
, last_ind
, func_ind
; /* debug last line number and pc */
59 ST_DATA
const char *funcname
;
61 ST_DATA CType char_pointer_type
, func_old_type
, int_type
, size_type
;
63 ST_DATA
struct switch_t
{
66 } **p
; int n
; /* list of case ranges */
67 int def_sym
; /* default symbol */
68 } *cur_switch
; /* current switch */
70 /* ------------------------------------------------------------------------- */
71 static void gen_cast(CType
*type
);
72 static inline CType
*pointed_type(CType
*type
);
73 static int is_compatible_types(CType
*type1
, CType
*type2
);
74 static int parse_btype(CType
*type
, AttributeDef
*ad
);
75 static void type_decl(CType
*type
, AttributeDef
*ad
, int *v
, int td
);
76 static void parse_expr_type(CType
*type
);
77 static void decl_initializer(CType
*type
, Section
*sec
, unsigned long c
, int first
, int size_only
);
78 static void block(int *bsym
, int *csym
, int is_expr
);
79 static void decl_initializer_alloc(CType
*type
, AttributeDef
*ad
, int r
, int has_init
, int v
, int scope
);
80 static int decl0(int l
, int is_for_loop_init
);
81 static void expr_eq(void);
82 static void expr_lor_const(void);
83 static void unary_type(CType
*type
);
84 static void vla_runtime_type_size(CType
*type
, int *a
);
85 static void vla_sp_restore(void);
86 static void vla_sp_restore_root(void);
87 static int is_compatible_parameter_types(CType
*type1
, CType
*type2
);
88 static void expr_type(CType
*type
);
89 ST_FUNC
void vpush64(int ty
, unsigned long long v
);
90 ST_FUNC
void vpush(CType
*type
);
91 ST_FUNC
int gvtst(int inv
, int t
);
92 ST_FUNC
int is_btype_size(int bt
);
93 static void gen_inline_functions(TCCState
*s
);
95 ST_INLN
int is_float(int t
)
99 return bt
== VT_LDOUBLE
|| bt
== VT_DOUBLE
|| bt
== VT_FLOAT
|| bt
== VT_QFLOAT
;
102 /* we use our own 'finite' function to avoid potential problems with
103 non standard math libs */
104 /* XXX: endianness dependent */
105 ST_FUNC
int ieee_finite(double d
)
108 memcpy(p
, &d
, sizeof(double));
109 return ((unsigned)((p
[1] | 0x800fffff) + 1)) >> 31;
112 ST_FUNC
void test_lvalue(void)
114 if (!(vtop
->r
& VT_LVAL
))
118 ST_FUNC
void check_vstack(void)
121 tcc_error("internal compiler error: vstack leak (%d)", vtop
- pvtop
);
124 /* ------------------------------------------------------------------------- */
125 /* vstack debugging aid */
128 void pv (const char *lbl
, int a
, int b
)
131 for (i
= a
; i
< a
+ b
; ++i
) {
132 SValue
*p
= &vtop
[-i
];
133 printf("%s vtop[-%d] : type.t:%04x r:%04x r2:%04x c.i:%d\n",
134 lbl
, i
, p
->type
.t
, p
->r
, p
->r2
, (int)p
->c
.i
);
139 /* ------------------------------------------------------------------------- */
140 ST_FUNC
void tccgen_start(TCCState
*s1
)
142 cur_text_section
= NULL
;
144 anon_sym
= SYM_FIRST_ANOM
;
148 /* define some often used types */
150 char_pointer_type
.t
= VT_BYTE
;
151 mk_pointer(&char_pointer_type
);
153 size_type
.t
= VT_INT
;
155 size_type
.t
= VT_LLONG
;
157 func_old_type
.t
= VT_FUNC
;
158 func_old_type
.ref
= sym_push(SYM_FIELD
, &int_type
, FUNC_CDECL
, FUNC_OLD
);
163 /* file info: full path + filename */
164 section_sym
= put_elf_sym(symtab_section
, 0, 0,
165 ELFW(ST_INFO
)(STB_LOCAL
, STT_SECTION
), 0,
166 text_section
->sh_num
, NULL
);
167 getcwd(buf
, sizeof(buf
));
169 normalize_slashes(buf
);
171 pstrcat(buf
, sizeof(buf
), "/");
172 put_stabs_r(buf
, N_SO
, 0, 0,
173 text_section
->data_offset
, text_section
, section_sym
);
174 put_stabs_r(file
->filename
, N_SO
, 0, 0,
175 text_section
->data_offset
, text_section
, section_sym
);
177 /* an elf symbol of type STT_FILE must be put so that STB_LOCAL
178 symbols can be safely used */
179 put_elf_sym(symtab_section
, 0, 0,
180 ELFW(ST_INFO
)(STB_LOCAL
, STT_FILE
), 0,
181 SHN_ABS
, file
->filename
);
183 #ifdef TCC_TARGET_ARM
188 ST_FUNC
void tccgen_end(TCCState
*s1
)
190 gen_inline_functions(s1
);
192 /* end of translation unit info */
194 put_stabs_r(NULL
, N_SO
, 0, 0,
195 text_section
->data_offset
, text_section
, section_sym
);
199 /* ------------------------------------------------------------------------- */
200 /* update sym->c so that it points to an external symbol in section
201 'section' with value 'value' */
203 ST_FUNC
void put_extern_sym2(Sym
*sym
, Section
*section
,
204 addr_t value
, unsigned long size
,
205 int can_add_underscore
)
207 int sym_type
, sym_bind
, sh_num
, info
, other
;
212 #ifdef CONFIG_TCC_BCHECK
218 else if (section
== SECTION_ABS
)
221 sh_num
= section
->sh_num
;
223 if ((sym
->type
.t
& VT_BTYPE
) == VT_FUNC
) {
225 } else if ((sym
->type
.t
& VT_BTYPE
) == VT_VOID
) {
226 sym_type
= STT_NOTYPE
;
228 sym_type
= STT_OBJECT
;
231 if (sym
->type
.t
& VT_STATIC
)
232 sym_bind
= STB_LOCAL
;
234 if (sym
->type
.t
& VT_WEAK
)
237 sym_bind
= STB_GLOBAL
;
241 name
= get_tok_str(sym
->v
, NULL
);
242 #ifdef CONFIG_TCC_BCHECK
243 if (tcc_state
->do_bounds_check
) {
244 /* XXX: avoid doing that for statics ? */
245 /* if bound checking is activated, we change some function
246 names by adding the "__bound" prefix */
249 /* XXX: we rely only on malloc hooks */
262 strcpy(buf
, "__bound_");
272 if (sym
->type
.t
& VT_EXPORT
)
273 other
|= ST_PE_EXPORT
;
274 if (sym_type
== STT_FUNC
&& sym
->type
.ref
) {
275 Sym
*ref
= sym
->type
.ref
;
276 if (ref
->a
.func_export
)
277 other
|= ST_PE_EXPORT
;
278 if (ref
->a
.func_call
== FUNC_STDCALL
&& can_add_underscore
) {
279 sprintf(buf1
, "_%s@%d", name
, ref
->a
.func_args
* PTR_SIZE
);
281 other
|= ST_PE_STDCALL
;
282 can_add_underscore
= 0;
285 if (find_elf_sym(tcc_state
->dynsymtab_section
, name
))
286 other
|= ST_PE_IMPORT
;
287 if (sym
->type
.t
& VT_IMPORT
)
288 other
|= ST_PE_IMPORT
;
291 if (! (sym
->type
.t
& VT_STATIC
))
292 other
= (sym
->type
.t
& VT_VIS_MASK
) >> VT_VIS_SHIFT
;
294 if (tcc_state
->leading_underscore
&& can_add_underscore
) {
296 pstrcpy(buf1
+ 1, sizeof(buf1
) - 1, name
);
299 if (sym
->asm_label
) {
300 name
= get_tok_str(sym
->asm_label
, NULL
);
302 info
= ELFW(ST_INFO
)(sym_bind
, sym_type
);
303 sym
->c
= set_elf_sym(symtab_section
, value
, size
, info
, other
, sh_num
, name
);
305 esym
= &((ElfW(Sym
) *)symtab_section
->data
)[sym
->c
];
306 esym
->st_value
= value
;
307 esym
->st_size
= size
;
308 esym
->st_shndx
= sh_num
;
312 ST_FUNC
void put_extern_sym(Sym
*sym
, Section
*section
,
313 addr_t value
, unsigned long size
)
315 put_extern_sym2(sym
, section
, value
, size
, 1);
318 /* add a new relocation entry to symbol 'sym' in section 's' */
319 ST_FUNC
void greloca(Section
*s
, Sym
*sym
, unsigned long offset
, int type
,
325 put_extern_sym(sym
, NULL
, 0, 0);
328 /* now we can add ELF relocation info */
329 put_elf_reloca(symtab_section
, s
, offset
, type
, c
, addend
);
332 ST_FUNC
void greloc(Section
*s
, Sym
*sym
, unsigned long offset
, int type
)
334 greloca(s
, sym
, offset
, type
, 0);
337 /* ------------------------------------------------------------------------- */
338 /* symbol allocator */
339 static Sym
*__sym_malloc(void)
341 Sym
*sym_pool
, *sym
, *last_sym
;
344 sym_pool
= tcc_malloc(SYM_POOL_NB
* sizeof(Sym
));
345 dynarray_add(&sym_pools
, &nb_sym_pools
, sym_pool
);
347 last_sym
= sym_free_first
;
349 for(i
= 0; i
< SYM_POOL_NB
; i
++) {
350 sym
->next
= last_sym
;
354 sym_free_first
= last_sym
;
358 static inline Sym
*sym_malloc(void)
361 sym
= sym_free_first
;
363 sym
= __sym_malloc();
364 sym_free_first
= sym
->next
;
368 ST_INLN
void sym_free(Sym
*sym
)
370 sym
->next
= sym_free_first
;
371 sym_free_first
= sym
;
374 /* push, without hashing */
375 ST_FUNC Sym
*sym_push2(Sym
**ps
, int v
, int t
, long c
)
395 /* find a symbol and return its associated structure. 's' is the top
396 of the symbol stack */
397 ST_FUNC Sym
*sym_find2(Sym
*s
, int v
)
409 /* structure lookup */
410 ST_INLN Sym
*struct_find(int v
)
413 if ((unsigned)v
>= (unsigned)(tok_ident
- TOK_IDENT
))
415 return table_ident
[v
]->sym_struct
;
418 /* find an identifier */
419 ST_INLN Sym
*sym_find(int v
)
422 if ((unsigned)v
>= (unsigned)(tok_ident
- TOK_IDENT
))
424 return table_ident
[v
]->sym_identifier
;
427 /* push a given symbol on the symbol stack */
428 ST_FUNC Sym
*sym_push(int v
, CType
*type
, int r
, int c
)
437 s
= sym_push2(ps
, v
, type
->t
, c
);
438 s
->type
.ref
= type
->ref
;
440 /* don't record fields or anonymous symbols */
442 if (!(v
& SYM_FIELD
) && (v
& ~SYM_STRUCT
) < SYM_FIRST_ANOM
) {
443 /* record symbol in token array */
444 ts
= table_ident
[(v
& ~SYM_STRUCT
) - TOK_IDENT
];
446 ps
= &ts
->sym_struct
;
448 ps
= &ts
->sym_identifier
;
451 s
->scope
= local_scope
;
452 if (s
->prev_tok
&& s
->prev_tok
->scope
== s
->scope
)
453 tcc_error("redeclaration of '%s'",
454 get_tok_str(v
& ~SYM_STRUCT
, NULL
));
459 /* push a global identifier */
460 ST_FUNC Sym
*global_identifier_push(int v
, int t
, int c
)
463 s
= sym_push2(&global_stack
, v
, t
, c
);
464 /* don't record anonymous symbol */
465 if (v
< SYM_FIRST_ANOM
) {
466 ps
= &table_ident
[v
- TOK_IDENT
]->sym_identifier
;
467 /* modify the top most local identifier, so that
468 sym_identifier will point to 's' when popped */
470 ps
= &(*ps
)->prev_tok
;
477 /* pop symbols until top reaches 'b' */
478 ST_FUNC
void sym_pop(Sym
**ptop
, Sym
*b
)
488 /* remove symbol in token array */
490 if (!(v
& SYM_FIELD
) && (v
& ~SYM_STRUCT
) < SYM_FIRST_ANOM
) {
491 ts
= table_ident
[(v
& ~SYM_STRUCT
) - TOK_IDENT
];
493 ps
= &ts
->sym_struct
;
495 ps
= &ts
->sym_identifier
;
504 static void weaken_symbol(Sym
*sym
)
506 sym
->type
.t
|= VT_WEAK
;
511 esym
= &((ElfW(Sym
) *)symtab_section
->data
)[sym
->c
];
512 esym_type
= ELFW(ST_TYPE
)(esym
->st_info
);
513 esym
->st_info
= ELFW(ST_INFO
)(STB_WEAK
, esym_type
);
517 static void apply_visibility(Sym
*sym
, CType
*type
)
519 int vis
= sym
->type
.t
& VT_VIS_MASK
;
520 int vis2
= type
->t
& VT_VIS_MASK
;
521 if (vis
== (STV_DEFAULT
<< VT_VIS_SHIFT
))
523 else if (vis2
== (STV_DEFAULT
<< VT_VIS_SHIFT
))
526 vis
= (vis
< vis2
) ? vis
: vis2
;
527 sym
->type
.t
&= ~VT_VIS_MASK
;
533 esym
= &((ElfW(Sym
) *)symtab_section
->data
)[sym
->c
];
534 vis
>>= VT_VIS_SHIFT
;
535 esym
->st_other
= (esym
->st_other
& ~ELFW(ST_VISIBILITY
)(-1)) | vis
;
539 /* ------------------------------------------------------------------------- */
541 ST_FUNC
void swap(int *p
, int *q
)
549 static void vsetc(CType
*type
, int r
, CValue
*vc
)
553 if (vtop
>= vstack
+ (VSTACK_SIZE
- 1))
554 tcc_error("memory full (vstack)");
555 /* cannot let cpu flags if other instruction are generated. Also
556 avoid leaving VT_JMP anywhere except on the top of the stack
557 because it would complicate the code generator. */
558 if (vtop
>= vstack
) {
559 v
= vtop
->r
& VT_VALMASK
;
560 if (v
== VT_CMP
|| (v
& ~1) == VT_JMP
)
570 /* push constant of type "type" with useless value */
571 ST_FUNC
void vpush(CType
*type
)
574 vsetc(type
, VT_CONST
, &cval
);
577 /* push integer constant */
578 ST_FUNC
void vpushi(int v
)
582 vsetc(&int_type
, VT_CONST
, &cval
);
585 /* push a pointer sized constant */
586 static void vpushs(addr_t v
)
590 vsetc(&size_type
, VT_CONST
, &cval
);
593 /* push arbitrary 64bit constant */
594 ST_FUNC
void vpush64(int ty
, unsigned long long v
)
601 vsetc(&ctype
, VT_CONST
, &cval
);
604 /* push long long constant */
605 static inline void vpushll(long long v
)
607 vpush64(VT_LLONG
, v
);
610 /* push a symbol value of TYPE */
611 static inline void vpushsym(CType
*type
, Sym
*sym
)
615 vsetc(type
, VT_CONST
| VT_SYM
, &cval
);
619 /* Return a static symbol pointing to a section */
620 ST_FUNC Sym
*get_sym_ref(CType
*type
, Section
*sec
, unsigned long offset
, unsigned long size
)
626 sym
= global_identifier_push(v
, type
->t
| VT_STATIC
, 0);
627 sym
->type
.ref
= type
->ref
;
628 sym
->r
= VT_CONST
| VT_SYM
;
629 put_extern_sym(sym
, sec
, offset
, size
);
633 /* push a reference to a section offset by adding a dummy symbol */
634 static void vpush_ref(CType
*type
, Section
*sec
, unsigned long offset
, unsigned long size
)
636 vpushsym(type
, get_sym_ref(type
, sec
, offset
, size
));
639 /* define a new external reference to a symbol 'v' of type 'u' */
640 ST_FUNC Sym
*external_global_sym(int v
, CType
*type
, int r
)
646 /* push forward reference */
647 s
= global_identifier_push(v
, type
->t
| VT_EXTERN
, 0);
648 s
->type
.ref
= type
->ref
;
649 s
->r
= r
| VT_CONST
| VT_SYM
;
654 /* define a new external reference to a symbol 'v' */
655 static Sym
*external_sym(int v
, CType
*type
, int r
)
661 /* push forward reference */
662 s
= sym_push(v
, type
, r
| VT_CONST
| VT_SYM
, 0);
663 s
->type
.t
|= VT_EXTERN
;
664 } else if (s
->type
.ref
== func_old_type
.ref
) {
665 s
->type
.ref
= type
->ref
;
666 s
->r
= r
| VT_CONST
| VT_SYM
;
667 s
->type
.t
|= VT_EXTERN
;
668 } else if (!is_compatible_types(&s
->type
, type
)) {
669 tcc_error("incompatible types for redefinition of '%s'",
670 get_tok_str(v
, NULL
));
672 /* Merge some storage attributes. */
673 if (type
->t
& VT_WEAK
)
676 if (type
->t
& VT_VIS_MASK
)
677 apply_visibility(s
, type
);
682 /* push a reference to global symbol v */
683 ST_FUNC
void vpush_global_sym(CType
*type
, int v
)
685 vpushsym(type
, external_global_sym(v
, type
, 0));
688 ST_FUNC
void vset(CType
*type
, int r
, int v
)
693 vsetc(type
, r
, &cval
);
696 static void vseti(int r
, int v
)
704 ST_FUNC
void vswap(void)
707 /* cannot let cpu flags if other instruction are generated. Also
708 avoid leaving VT_JMP anywhere except on the top of the stack
709 because it would complicate the code generator. */
710 if (vtop
>= vstack
) {
711 int v
= vtop
->r
& VT_VALMASK
;
712 if (v
== VT_CMP
|| (v
& ~1) == VT_JMP
)
719 /* XXX: +2% overall speed possible with optimized memswap
721 * memswap(&vtop[0], &vtop[1], sizeof *vtop);
725 ST_FUNC
void vpushv(SValue
*v
)
727 if (vtop
>= vstack
+ (VSTACK_SIZE
- 1))
728 tcc_error("memory full (vstack)");
733 static void vdup(void)
738 /* save registers up to (vtop - n) stack entry */
739 ST_FUNC
void save_regs(int n
)
742 for(p
= vstack
, p1
= vtop
- n
; p
<= p1
; p
++)
746 /* save r to the memory stack, and mark it as being free */
747 ST_FUNC
void save_reg(int r
)
749 save_reg_upstack(r
, 0);
752 /* save r to the memory stack, and mark it as being free,
753 if seen up to (vtop - n) stack entry */
754 ST_FUNC
void save_reg_upstack(int r
, int n
)
756 int l
, saved
, size
, align
;
760 if ((r
&= VT_VALMASK
) >= VT_CONST
)
763 /* modify all stack values */
766 for(p
= vstack
, p1
= vtop
- n
; p
<= p1
; p
++) {
767 if ((p
->r
& VT_VALMASK
) == r
||
768 ((p
->type
.t
& VT_BTYPE
) == VT_LLONG
&& (p
->r2
& VT_VALMASK
) == r
)) {
769 /* must save value on stack if not already done */
771 /* NOTE: must reload 'r' because r might be equal to r2 */
772 r
= p
->r
& VT_VALMASK
;
773 /* store register in the stack */
775 if ((p
->r
& VT_LVAL
) ||
776 (!is_float(type
->t
) && (type
->t
& VT_BTYPE
) != VT_LLONG
))
777 #if defined(TCC_TARGET_ARM64) || defined(TCC_TARGET_X86_64)
778 type
= &char_pointer_type
;
782 size
= type_size(type
, &align
);
783 loc
= (loc
- size
) & -align
;
785 sv
.r
= VT_LOCAL
| VT_LVAL
;
788 #if defined(TCC_TARGET_I386) || defined(TCC_TARGET_X86_64)
789 /* x86 specific: need to pop fp register ST0 if saved */
791 o(0xd8dd); /* fstp %st(0) */
794 #if !defined(TCC_TARGET_ARM64) && !defined(TCC_TARGET_X86_64)
795 /* special long long case */
796 if ((type
->t
& VT_BTYPE
) == VT_LLONG
) {
804 /* mark that stack entry as being saved on the stack */
805 if (p
->r
& VT_LVAL
) {
806 /* also clear the bounded flag because the
807 relocation address of the function was stored in
809 p
->r
= (p
->r
& ~(VT_VALMASK
| VT_BOUNDED
)) | VT_LLOCAL
;
811 p
->r
= lvalue_type(p
->type
.t
) | VT_LOCAL
;
819 #ifdef TCC_TARGET_ARM
820 /* find a register of class 'rc2' with at most one reference on stack.
821 * If none, call get_reg(rc) */
822 ST_FUNC
int get_reg_ex(int rc
, int rc2
)
827 for(r
=0;r
<NB_REGS
;r
++) {
828 if (reg_classes
[r
] & rc2
) {
831 for(p
= vstack
; p
<= vtop
; p
++) {
832 if ((p
->r
& VT_VALMASK
) == r
||
833 (p
->r2
& VT_VALMASK
) == r
)
844 /* find a free register of class 'rc'. If none, save one register */
845 ST_FUNC
int get_reg(int rc
)
850 /* find a free register */
851 for(r
=0;r
<NB_REGS
;r
++) {
852 if (reg_classes
[r
] & rc
) {
853 for(p
=vstack
;p
<=vtop
;p
++) {
854 if ((p
->r
& VT_VALMASK
) == r
||
855 (p
->r2
& VT_VALMASK
) == r
)
863 /* no register left : free the first one on the stack (VERY
864 IMPORTANT to start from the bottom to ensure that we don't
865 spill registers used in gen_opi()) */
866 for(p
=vstack
;p
<=vtop
;p
++) {
867 /* look at second register (if long long) */
868 r
= p
->r2
& VT_VALMASK
;
869 if (r
< VT_CONST
&& (reg_classes
[r
] & rc
))
871 r
= p
->r
& VT_VALMASK
;
872 if (r
< VT_CONST
&& (reg_classes
[r
] & rc
)) {
878 /* Should never comes here */
882 /* move register 's' (of type 't') to 'r', and flush previous value of r to memory
884 static void move_reg(int r
, int s
, int t
)
898 /* get address of vtop (vtop MUST BE an lvalue) */
899 ST_FUNC
void gaddrof(void)
901 if (vtop
->r
& VT_REF
&& !nocode_wanted
)
904 /* tricky: if saved lvalue, then we can go back to lvalue */
905 if ((vtop
->r
& VT_VALMASK
) == VT_LLOCAL
)
906 vtop
->r
= (vtop
->r
& ~(VT_VALMASK
| VT_LVAL_TYPE
)) | VT_LOCAL
| VT_LVAL
;
911 #ifdef CONFIG_TCC_BCHECK
912 /* generate lvalue bound code */
913 static void gbound(void)
918 vtop
->r
&= ~VT_MUSTBOUND
;
919 /* if lvalue, then use checking code before dereferencing */
920 if (vtop
->r
& VT_LVAL
) {
921 /* if not VT_BOUNDED value, then make one */
922 if (!(vtop
->r
& VT_BOUNDED
)) {
923 lval_type
= vtop
->r
& (VT_LVAL_TYPE
| VT_LVAL
);
924 /* must save type because we must set it to int to get pointer */
926 vtop
->type
.t
= VT_PTR
;
929 gen_bounded_ptr_add();
930 vtop
->r
|= lval_type
;
933 /* then check for dereferencing */
934 gen_bounded_ptr_deref();
939 /* store vtop a register belonging to class 'rc'. lvalues are
940 converted to values. Cannot be used if cannot be converted to
941 register value (such as structures). */
942 ST_FUNC
int gv(int rc
)
944 int r
, bit_pos
, bit_size
, size
, align
, i
;
947 /* NOTE: get_reg can modify vstack[] */
948 if (vtop
->type
.t
& VT_BITFIELD
) {
951 bit_pos
= (vtop
->type
.t
>> VT_STRUCT_SHIFT
) & 0x3f;
952 bit_size
= (vtop
->type
.t
>> (VT_STRUCT_SHIFT
+ 6)) & 0x3f;
953 /* remove bit field info to avoid loops */
954 vtop
->type
.t
&= ~VT_BITFIELD
& ((1 << VT_STRUCT_SHIFT
) - 1);
955 /* cast to int to propagate signedness in following ops */
956 if ((vtop
->type
.t
& VT_BTYPE
) == VT_LLONG
) {
961 if((vtop
->type
.t
& VT_UNSIGNED
) ||
962 (vtop
->type
.t
& VT_BTYPE
) == VT_BOOL
)
963 type
.t
|= VT_UNSIGNED
;
965 /* generate shifts */
966 vpushi(bits
- (bit_pos
+ bit_size
));
968 vpushi(bits
- bit_size
);
969 /* NOTE: transformed to SHR if unsigned */
973 if (is_float(vtop
->type
.t
) &&
974 (vtop
->r
& (VT_VALMASK
| VT_LVAL
)) == VT_CONST
) {
977 unsigned long offset
;
978 #if defined(TCC_TARGET_ARM) && !defined(TCC_ARM_VFP)
982 /* XXX: unify with initializers handling ? */
983 /* CPUs usually cannot use float constants, so we store them
984 generically in data segment */
985 size
= type_size(&vtop
->type
, &align
);
986 offset
= (data_section
->data_offset
+ align
- 1) & -align
;
987 data_section
->data_offset
= offset
;
988 /* XXX: not portable yet */
989 #if defined(__i386__) || defined(__x86_64__)
990 /* Zero pad x87 tenbyte long doubles */
991 if (size
== LDOUBLE_SIZE
) {
992 vtop
->c
.tab
[2] &= 0xffff;
993 #if LDOUBLE_SIZE == 16
998 ptr
= section_ptr_add(data_section
, size
);
1000 #if defined(TCC_TARGET_ARM) && !defined(TCC_ARM_VFP)
1004 ptr
[i
] = vtop
->c
.tab
[size
-1-i
];
1008 ptr
[i
] = vtop
->c
.tab
[i
];
1009 sym
= get_sym_ref(&vtop
->type
, data_section
, offset
, size
<< 2);
1010 vtop
->r
|= VT_LVAL
| VT_SYM
;
1014 #ifdef CONFIG_TCC_BCHECK
1015 if (vtop
->r
& VT_MUSTBOUND
)
1019 r
= vtop
->r
& VT_VALMASK
;
1020 rc2
= (rc
& RC_FLOAT
) ? RC_FLOAT
: RC_INT
;
1021 #ifndef TCC_TARGET_ARM64
1024 #ifdef TCC_TARGET_X86_64
1025 else if (rc
== RC_FRET
)
1030 /* need to reload if:
1032 - lvalue (need to dereference pointer)
1033 - already a register, but not in the right class */
1035 || (vtop
->r
& VT_LVAL
)
1036 || !(reg_classes
[r
] & rc
)
1037 #if defined(TCC_TARGET_ARM64) || defined(TCC_TARGET_X86_64)
1038 || ((vtop
->type
.t
& VT_BTYPE
) == VT_QLONG
&& !(reg_classes
[vtop
->r2
] & rc2
))
1039 || ((vtop
->type
.t
& VT_BTYPE
) == VT_QFLOAT
&& !(reg_classes
[vtop
->r2
] & rc2
))
1041 || ((vtop
->type
.t
& VT_BTYPE
) == VT_LLONG
&& !(reg_classes
[vtop
->r2
] & rc2
))
1046 #if defined(TCC_TARGET_ARM64) || defined(TCC_TARGET_X86_64)
1047 if (((vtop
->type
.t
& VT_BTYPE
) == VT_QLONG
) || ((vtop
->type
.t
& VT_BTYPE
) == VT_QFLOAT
)) {
1048 int addr_type
= VT_LLONG
, load_size
= 8, load_type
= ((vtop
->type
.t
& VT_BTYPE
) == VT_QLONG
) ? VT_LLONG
: VT_DOUBLE
;
1050 if ((vtop
->type
.t
& VT_BTYPE
) == VT_LLONG
) {
1051 int addr_type
= VT_INT
, load_size
= 4, load_type
= VT_INT
;
1052 unsigned long long ll
;
1054 int r2
, original_type
;
1055 original_type
= vtop
->type
.t
;
1056 /* two register type load : expand to two words
1058 #if !defined(TCC_TARGET_ARM64) && !defined(TCC_TARGET_X86_64)
1059 if ((vtop
->r
& (VT_VALMASK
| VT_LVAL
)) == VT_CONST
) {
1062 vtop
->c
.i
= ll
; /* first word */
1064 vtop
->r
= r
; /* save register value */
1065 vpushi(ll
>> 32); /* second word */
1068 if (vtop
->r
& VT_LVAL
) {
1069 /* We do not want to modifier the long long
1070 pointer here, so the safest (and less
1071 efficient) is to save all the other registers
1072 in the stack. XXX: totally inefficient. */
1076 /* lvalue_save: save only if used further down the stack */
1077 save_reg_upstack(vtop
->r
, 1);
1079 /* load from memory */
1080 vtop
->type
.t
= load_type
;
1083 vtop
[-1].r
= r
; /* save register value */
1084 /* increment pointer to get second word */
1085 vtop
->type
.t
= addr_type
;
1090 vtop
->type
.t
= load_type
;
1092 /* move registers */
1095 vtop
[-1].r
= r
; /* save register value */
1096 vtop
->r
= vtop
[-1].r2
;
1098 /* Allocate second register. Here we rely on the fact that
1099 get_reg() tries first to free r2 of an SValue. */
1103 /* write second register */
1105 vtop
->type
.t
= original_type
;
1106 } else if ((vtop
->r
& VT_LVAL
) && !is_float(vtop
->type
.t
)) {
1108 /* lvalue of scalar type : need to use lvalue type
1109 because of possible cast */
1112 /* compute memory access type */
1113 if (vtop
->r
& VT_REF
)
1114 #if defined(TCC_TARGET_ARM64) || defined(TCC_TARGET_X86_64)
1119 else if (vtop
->r
& VT_LVAL_BYTE
)
1121 else if (vtop
->r
& VT_LVAL_SHORT
)
1123 if (vtop
->r
& VT_LVAL_UNSIGNED
)
1127 /* restore wanted type */
1130 /* one register type load */
1135 #ifdef TCC_TARGET_C67
1136 /* uses register pairs for doubles */
1137 if ((vtop
->type
.t
& VT_BTYPE
) == VT_DOUBLE
)
1144 /* generate vtop[-1] and vtop[0] in resp. classes rc1 and rc2 */
1145 ST_FUNC
void gv2(int rc1
, int rc2
)
1149 /* generate more generic register first. But VT_JMP or VT_CMP
1150 values must be generated first in all cases to avoid possible
1152 v
= vtop
[0].r
& VT_VALMASK
;
1153 if (v
!= VT_CMP
&& (v
& ~1) != VT_JMP
&& rc1
<= rc2
) {
1158 /* test if reload is needed for first register */
1159 if ((vtop
[-1].r
& VT_VALMASK
) >= VT_CONST
) {
1169 /* test if reload is needed for first register */
1170 if ((vtop
[0].r
& VT_VALMASK
) >= VT_CONST
) {
1176 #ifndef TCC_TARGET_ARM64
1177 /* wrapper around RC_FRET to return a register by type */
1178 static int rc_fret(int t
)
1180 #ifdef TCC_TARGET_X86_64
1181 if (t
== VT_LDOUBLE
) {
1189 /* wrapper around REG_FRET to return a register by type */
1190 static int reg_fret(int t
)
1192 #ifdef TCC_TARGET_X86_64
1193 if (t
== VT_LDOUBLE
) {
1200 /* expand 64bit on stack in two ints */
1201 static void lexpand(void)
1204 u
= vtop
->type
.t
& (VT_DEFSIGN
| VT_UNSIGNED
);
1205 v
= vtop
->r
& (VT_VALMASK
| VT_LVAL
);
1206 if (v
== VT_CONST
) {
1209 } else if (v
== (VT_LVAL
|VT_CONST
) || v
== (VT_LVAL
|VT_LOCAL
)) {
1215 vtop
[0].r
= vtop
[-1].r2
;
1216 vtop
[0].r2
= vtop
[-1].r2
= VT_CONST
;
1218 vtop
[0].type
.t
= vtop
[-1].type
.t
= VT_INT
| u
;
1221 #ifdef TCC_TARGET_ARM
1222 /* expand long long on stack */
1223 ST_FUNC
void lexpand_nr(void)
1227 u
= vtop
->type
.t
& (VT_DEFSIGN
| VT_UNSIGNED
);
1229 vtop
->r2
= VT_CONST
;
1230 vtop
->type
.t
= VT_INT
| u
;
1231 v
=vtop
[-1].r
& (VT_VALMASK
| VT_LVAL
);
1232 if (v
== VT_CONST
) {
1233 vtop
[-1].c
.i
= vtop
->c
.i
;
1234 vtop
->c
.i
= vtop
->c
.i
>> 32;
1236 } else if (v
== (VT_LVAL
|VT_CONST
) || v
== (VT_LVAL
|VT_LOCAL
)) {
1238 vtop
->r
= vtop
[-1].r
;
1239 } else if (v
> VT_CONST
) {
1243 vtop
->r
= vtop
[-1].r2
;
1244 vtop
[-1].r2
= VT_CONST
;
1245 vtop
[-1].type
.t
= VT_INT
| u
;
1249 #if !defined(TCC_TARGET_X86_64) && !defined(TCC_TARGET_ARM64)
1250 /* build a long long from two ints */
1251 static void lbuild(int t
)
1253 gv2(RC_INT
, RC_INT
);
1254 vtop
[-1].r2
= vtop
[0].r
;
1255 vtop
[-1].type
.t
= t
;
1260 /* rotate n first stack elements to the bottom
1261 I1 ... In -> I2 ... In I1 [top is right]
1263 ST_FUNC
void vrotb(int n
)
1269 for(i
=-n
+1;i
!=0;i
++)
1270 vtop
[i
] = vtop
[i
+1];
1274 /* rotate the n elements before entry e towards the top
1275 I1 ... In ... -> In I1 ... I(n-1) ... [top is right]
1277 ST_FUNC
void vrote(SValue
*e
, int n
)
1283 for(i
= 0;i
< n
- 1; i
++)
1288 /* rotate n first stack elements to the top
1289 I1 ... In -> In I1 ... I(n-1) [top is right]
1291 ST_FUNC
void vrott(int n
)
1296 /* pop stack value */
1297 ST_FUNC
void vpop(void)
1300 v
= vtop
->r
& VT_VALMASK
;
1301 #if defined(TCC_TARGET_I386) || defined(TCC_TARGET_X86_64)
1302 /* for x86, we need to pop the FP stack */
1303 if (v
== TREG_ST0
&& !nocode_wanted
) {
1304 o(0xd8dd); /* fstp %st(0) */
1307 if (v
== VT_JMP
|| v
== VT_JMPI
) {
1308 /* need to put correct jump if && or || without test */
1314 /* convert stack entry to register and duplicate its value in another
1316 static void gv_dup(void)
1322 #if !defined(TCC_TARGET_X86_64) && !defined(TCC_TARGET_ARM64)
1323 if ((t
& VT_BTYPE
) == VT_LLONG
) {
1330 /* stack: H L L1 H1 */
1340 /* duplicate value */
1345 #ifdef TCC_TARGET_X86_64
1346 if ((t
& VT_BTYPE
) == VT_LDOUBLE
) {
1356 load(r1
, &sv
); /* move r to r1 */
1358 /* duplicates value */
1364 /* Generate value test
1366 * Generate a test for any value (jump, comparison and integers) */
1367 ST_FUNC
int gvtst(int inv
, int t
)
1369 int v
= vtop
->r
& VT_VALMASK
;
1370 if (v
!= VT_CMP
&& v
!= VT_JMP
&& v
!= VT_JMPI
) {
1374 if ((vtop
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) == VT_CONST
) {
1375 /* constant jmp optimization */
1376 if ((vtop
->c
.i
!= 0) != inv
)
1381 return gtst(inv
, t
);
1384 #if !defined(TCC_TARGET_ARM64) && !defined(TCC_TARGET_X86_64)
1385 /* generate CPU independent (unsigned) long long operations */
1386 static void gen_opl(int op
)
1388 int t
, a
, b
, op1
, c
, i
;
1390 unsigned short reg_iret
= REG_IRET
;
1391 unsigned short reg_lret
= REG_LRET
;
1397 func
= TOK___divdi3
;
1400 func
= TOK___udivdi3
;
1403 func
= TOK___moddi3
;
1406 func
= TOK___umoddi3
;
1413 /* call generic long long function */
1414 vpush_global_sym(&func_old_type
, func
);
1419 vtop
->r2
= reg_lret
;
1427 //pv("gen_opl A",0,2);
1433 /* stack: L1 H1 L2 H2 */
1438 vtop
[-2] = vtop
[-3];
1441 /* stack: H1 H2 L1 L2 */
1442 //pv("gen_opl B",0,4);
1448 /* stack: H1 H2 L1 L2 ML MH */
1451 /* stack: ML MH H1 H2 L1 L2 */
1455 /* stack: ML MH H1 L2 H2 L1 */
1460 /* stack: ML MH M1 M2 */
1463 } else if (op
== '+' || op
== '-') {
1464 /* XXX: add non carry method too (for MIPS or alpha) */
1470 /* stack: H1 H2 (L1 op L2) */
1473 gen_op(op1
+ 1); /* TOK_xxxC2 */
1476 /* stack: H1 H2 (L1 op L2) */
1479 /* stack: (L1 op L2) H1 H2 */
1481 /* stack: (L1 op L2) (H1 op H2) */
1489 if ((vtop
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) == VT_CONST
) {
1490 t
= vtop
[-1].type
.t
;
1494 /* stack: L H shift */
1496 /* constant: simpler */
1497 /* NOTE: all comments are for SHL. the other cases are
1498 done by swaping words */
1509 if (op
!= TOK_SAR
) {
1542 /* XXX: should provide a faster fallback on x86 ? */
1545 func
= TOK___ashrdi3
;
1548 func
= TOK___lshrdi3
;
1551 func
= TOK___ashldi3
;
1557 /* compare operations */
1563 /* stack: L1 H1 L2 H2 */
1565 vtop
[-1] = vtop
[-2];
1567 /* stack: L1 L2 H1 H2 */
1570 /* when values are equal, we need to compare low words. since
1571 the jump is inverted, we invert the test too. */
1574 else if (op1
== TOK_GT
)
1576 else if (op1
== TOK_ULT
)
1578 else if (op1
== TOK_UGT
)
1583 if (op1
!= TOK_NE
) {
1587 /* generate non equal test */
1588 /* XXX: NOT PORTABLE yet */
1592 #if defined(TCC_TARGET_I386)
1593 b
= psym(0x850f, 0);
1594 #elif defined(TCC_TARGET_ARM)
1596 o(0x1A000000 | encbranch(ind
, 0, 1));
1597 #elif defined(TCC_TARGET_C67) || defined(TCC_TARGET_ARM64)
1598 tcc_error("not implemented");
1600 #error not supported
1604 /* compare low. Always unsigned */
1608 else if (op1
== TOK_LE
)
1610 else if (op1
== TOK_GT
)
1612 else if (op1
== TOK_GE
)
1623 static uint64_t gen_opic_sdiv(uint64_t a
, uint64_t b
)
1625 uint64_t x
= (a
>> 63 ? -a
: a
) / (b
>> 63 ? -b
: b
);
1626 return (a
^ b
) >> 63 ? -x
: x
;
1629 static int gen_opic_lt(uint64_t a
, uint64_t b
)
1631 return (a
^ (uint64_t)1 << 63) < (b
^ (uint64_t)1 << 63);
1634 /* handle integer constant optimizations and various machine
1636 static void gen_opic(int op
)
1638 SValue
*v1
= vtop
- 1;
1640 int t1
= v1
->type
.t
& VT_BTYPE
;
1641 int t2
= v2
->type
.t
& VT_BTYPE
;
1642 int c1
= (v1
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) == VT_CONST
;
1643 int c2
= (v2
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) == VT_CONST
;
1644 uint64_t l1
= c1
? v1
->c
.i
: 0;
1645 uint64_t l2
= c2
? v2
->c
.i
: 0;
1646 int shm
= (t1
== VT_LLONG
) ? 63 : 31;
1649 l1
= ((uint32_t)l1
|
1650 (v1
->type
.t
& VT_UNSIGNED
? 0 : -(l1
& 0x80000000)));
1652 l2
= ((uint32_t)l2
|
1653 (v2
->type
.t
& VT_UNSIGNED
? 0 : -(l2
& 0x80000000)));
1657 case '+': l1
+= l2
; break;
1658 case '-': l1
-= l2
; break;
1659 case '&': l1
&= l2
; break;
1660 case '^': l1
^= l2
; break;
1661 case '|': l1
|= l2
; break;
1662 case '*': l1
*= l2
; break;
1669 /* if division by zero, generate explicit division */
1672 tcc_error("division by zero in constant");
1676 default: l1
= gen_opic_sdiv(l1
, l2
); break;
1677 case '%': l1
= l1
- l2
* gen_opic_sdiv(l1
, l2
); break;
1678 case TOK_UDIV
: l1
= l1
/ l2
; break;
1679 case TOK_UMOD
: l1
= l1
% l2
; break;
1682 case TOK_SHL
: l1
<<= (l2
& shm
); break;
1683 case TOK_SHR
: l1
>>= (l2
& shm
); break;
1685 l1
= (l1
>> 63) ? ~(~l1
>> (l2
& shm
)) : l1
>> (l2
& shm
);
1688 case TOK_ULT
: l1
= l1
< l2
; break;
1689 case TOK_UGE
: l1
= l1
>= l2
; break;
1690 case TOK_EQ
: l1
= l1
== l2
; break;
1691 case TOK_NE
: l1
= l1
!= l2
; break;
1692 case TOK_ULE
: l1
= l1
<= l2
; break;
1693 case TOK_UGT
: l1
= l1
> l2
; break;
1694 case TOK_LT
: l1
= gen_opic_lt(l1
, l2
); break;
1695 case TOK_GE
: l1
= !gen_opic_lt(l1
, l2
); break;
1696 case TOK_LE
: l1
= !gen_opic_lt(l2
, l1
); break;
1697 case TOK_GT
: l1
= gen_opic_lt(l2
, l1
); break;
1699 case TOK_LAND
: l1
= l1
&& l2
; break;
1700 case TOK_LOR
: l1
= l1
|| l2
; break;
1707 /* if commutative ops, put c2 as constant */
1708 if (c1
&& (op
== '+' || op
== '&' || op
== '^' ||
1709 op
== '|' || op
== '*')) {
1711 c2
= c1
; //c = c1, c1 = c2, c2 = c;
1712 l2
= l1
; //l = l1, l1 = l2, l2 = l;
1714 if (!const_wanted
&&
1716 (op
== TOK_SHL
|| op
== TOK_SHR
|| op
== TOK_SAR
)) ||
1717 (l1
== -1 && op
== TOK_SAR
))) {
1718 /* treat (0 << x), (0 >> x) and (-1 >> x) as constant */
1720 } else if (!const_wanted
&&
1721 c2
&& ((l2
== 0 && (op
== '&' || op
== '*')) ||
1722 (l2
== -1 && op
== '|') ||
1723 (l2
== 0xffffffff && t2
!= VT_LLONG
&& op
== '|') ||
1724 (l2
== 1 && (op
== '%' || op
== TOK_UMOD
)))) {
1725 /* treat (x & 0), (x * 0), (x | -1) and (x % 1) as constant */
1730 } else if (c2
&& (((op
== '*' || op
== '/' || op
== TOK_UDIV
||
1733 ((op
== '+' || op
== '-' || op
== '|' || op
== '^' ||
1734 op
== TOK_SHL
|| op
== TOK_SHR
|| op
== TOK_SAR
) &&
1738 /* filter out NOP operations like x*1, x-0, x&-1... */
1740 } else if (c2
&& (op
== '*' || op
== TOK_PDIV
|| op
== TOK_UDIV
)) {
1741 /* try to use shifts instead of muls or divs */
1742 if (l2
> 0 && (l2
& (l2
- 1)) == 0) {
1751 else if (op
== TOK_PDIV
)
1757 } else if (c2
&& (op
== '+' || op
== '-') &&
1758 (((vtop
[-1].r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) == (VT_CONST
| VT_SYM
))
1759 || (vtop
[-1].r
& (VT_VALMASK
| VT_LVAL
)) == VT_LOCAL
)) {
1760 /* symbol + constant case */
1767 if (!nocode_wanted
) {
1768 /* call low level op generator */
1769 if (t1
== VT_LLONG
|| t2
== VT_LLONG
||
1770 (PTR_SIZE
== 8 && (t1
== VT_PTR
|| t2
== VT_PTR
)))
1781 /* generate a floating point operation with constant propagation */
1782 static void gen_opif(int op
)
1790 /* currently, we cannot do computations with forward symbols */
1791 c1
= (v1
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) == VT_CONST
;
1792 c2
= (v2
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) == VT_CONST
;
1794 if (v1
->type
.t
== VT_FLOAT
) {
1797 } else if (v1
->type
.t
== VT_DOUBLE
) {
1805 /* NOTE: we only do constant propagation if finite number (not
1806 NaN or infinity) (ANSI spec) */
1807 if (!ieee_finite(f1
) || !ieee_finite(f2
))
1811 case '+': f1
+= f2
; break;
1812 case '-': f1
-= f2
; break;
1813 case '*': f1
*= f2
; break;
1817 tcc_error("division by zero in constant");
1822 /* XXX: also handles tests ? */
1826 /* XXX: overflow test ? */
1827 if (v1
->type
.t
== VT_FLOAT
) {
1829 } else if (v1
->type
.t
== VT_DOUBLE
) {
1837 if (!nocode_wanted
) {
1845 static int pointed_size(CType
*type
)
1848 return type_size(pointed_type(type
), &align
);
1851 static void vla_runtime_pointed_size(CType
*type
)
1854 vla_runtime_type_size(pointed_type(type
), &align
);
1857 static inline int is_null_pointer(SValue
*p
)
1859 if ((p
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) != VT_CONST
)
1861 return ((p
->type
.t
& VT_BTYPE
) == VT_INT
&& (uint32_t)p
->c
.i
== 0) ||
1862 ((p
->type
.t
& VT_BTYPE
) == VT_LLONG
&& p
->c
.i
== 0) ||
1863 ((p
->type
.t
& VT_BTYPE
) == VT_PTR
&&
1864 (PTR_SIZE
== 4 ? (uint32_t)p
->c
.i
== 0 : p
->c
.i
== 0));
1867 static inline int is_integer_btype(int bt
)
1869 return (bt
== VT_BYTE
|| bt
== VT_SHORT
||
1870 bt
== VT_INT
|| bt
== VT_LLONG
);
1873 /* check types for comparison or subtraction of pointers */
1874 static void check_comparison_pointer_types(SValue
*p1
, SValue
*p2
, int op
)
1876 CType
*type1
, *type2
, tmp_type1
, tmp_type2
;
1879 /* null pointers are accepted for all comparisons as gcc */
1880 if (is_null_pointer(p1
) || is_null_pointer(p2
))
1884 bt1
= type1
->t
& VT_BTYPE
;
1885 bt2
= type2
->t
& VT_BTYPE
;
1886 /* accept comparison between pointer and integer with a warning */
1887 if ((is_integer_btype(bt1
) || is_integer_btype(bt2
)) && op
!= '-') {
1888 if (op
!= TOK_LOR
&& op
!= TOK_LAND
)
1889 tcc_warning("comparison between pointer and integer");
1893 /* both must be pointers or implicit function pointers */
1894 if (bt1
== VT_PTR
) {
1895 type1
= pointed_type(type1
);
1896 } else if (bt1
!= VT_FUNC
)
1897 goto invalid_operands
;
1899 if (bt2
== VT_PTR
) {
1900 type2
= pointed_type(type2
);
1901 } else if (bt2
!= VT_FUNC
) {
1903 tcc_error("invalid operands to binary %s", get_tok_str(op
, NULL
));
1905 if ((type1
->t
& VT_BTYPE
) == VT_VOID
||
1906 (type2
->t
& VT_BTYPE
) == VT_VOID
)
1910 tmp_type1
.t
&= ~(VT_DEFSIGN
| VT_UNSIGNED
| VT_CONSTANT
| VT_VOLATILE
);
1911 tmp_type2
.t
&= ~(VT_DEFSIGN
| VT_UNSIGNED
| VT_CONSTANT
| VT_VOLATILE
);
1912 if (!is_compatible_types(&tmp_type1
, &tmp_type2
)) {
1913 /* gcc-like error if '-' is used */
1915 goto invalid_operands
;
1917 tcc_warning("comparison of distinct pointer types lacks a cast");
1921 /* generic gen_op: handles types problems */
1922 ST_FUNC
void gen_op(int op
)
1924 int u
, t1
, t2
, bt1
, bt2
, t
;
1927 t1
= vtop
[-1].type
.t
;
1928 t2
= vtop
[0].type
.t
;
1929 bt1
= t1
& VT_BTYPE
;
1930 bt2
= t2
& VT_BTYPE
;
1932 if (bt1
== VT_STRUCT
|| bt2
== VT_STRUCT
) {
1933 tcc_error("operation on a struct");
1934 } else if (bt1
== VT_PTR
|| bt2
== VT_PTR
) {
1935 /* at least one operand is a pointer */
1936 /* relationnal op: must be both pointers */
1937 if (op
>= TOK_ULT
&& op
<= TOK_LOR
) {
1938 check_comparison_pointer_types(vtop
- 1, vtop
, op
);
1939 /* pointers are handled are unsigned */
1940 #if defined(TCC_TARGET_ARM64) || defined(TCC_TARGET_X86_64)
1941 t
= VT_LLONG
| VT_UNSIGNED
;
1943 t
= VT_INT
| VT_UNSIGNED
;
1947 /* if both pointers, then it must be the '-' op */
1948 if (bt1
== VT_PTR
&& bt2
== VT_PTR
) {
1950 tcc_error("cannot use pointers here");
1951 check_comparison_pointer_types(vtop
- 1, vtop
, op
);
1952 /* XXX: check that types are compatible */
1953 if (vtop
[-1].type
.t
& VT_VLA
) {
1954 vla_runtime_pointed_size(&vtop
[-1].type
);
1956 vpushi(pointed_size(&vtop
[-1].type
));
1960 /* set to integer type */
1961 #if defined(TCC_TARGET_ARM64) || defined(TCC_TARGET_X86_64)
1962 vtop
->type
.t
= VT_LLONG
;
1964 vtop
->type
.t
= VT_INT
;
1969 /* exactly one pointer : must be '+' or '-'. */
1970 if (op
!= '-' && op
!= '+')
1971 tcc_error("cannot use pointers here");
1972 /* Put pointer as first operand */
1973 if (bt2
== VT_PTR
) {
1978 if ((vtop
[0].type
.t
& VT_BTYPE
) == VT_LLONG
)
1979 /* XXX: truncate here because gen_opl can't handle ptr + long long */
1980 gen_cast(&int_type
);
1982 type1
= vtop
[-1].type
;
1983 type1
.t
&= ~VT_ARRAY
;
1984 if (vtop
[-1].type
.t
& VT_VLA
)
1985 vla_runtime_pointed_size(&vtop
[-1].type
);
1987 u
= pointed_size(&vtop
[-1].type
);
1989 tcc_error("unknown array element size");
1990 #if defined(TCC_TARGET_ARM64) || defined(TCC_TARGET_X86_64)
1993 /* XXX: cast to int ? (long long case) */
1999 /* #ifdef CONFIG_TCC_BCHECK
2000 The main reason to removing this code:
2007 fprintf(stderr, "v+i-j = %p\n", v+i-j);
2008 fprintf(stderr, "v+(i-j) = %p\n", v+(i-j));
2010 When this code is on. then the output looks like
2012 v+(i-j) = 0xbff84000
2014 /* if evaluating constant expression, no code should be
2015 generated, so no bound check */
2016 if (tcc_state
->do_bounds_check
&& !const_wanted
) {
2017 /* if bounded pointers, we generate a special code to
2024 gen_bounded_ptr_add();
2030 /* put again type if gen_opic() swaped operands */
2033 } else if (is_float(bt1
) || is_float(bt2
)) {
2034 /* compute bigger type and do implicit casts */
2035 if (bt1
== VT_LDOUBLE
|| bt2
== VT_LDOUBLE
) {
2037 } else if (bt1
== VT_DOUBLE
|| bt2
== VT_DOUBLE
) {
2042 /* floats can only be used for a few operations */
2043 if (op
!= '+' && op
!= '-' && op
!= '*' && op
!= '/' &&
2044 (op
< TOK_ULT
|| op
> TOK_GT
))
2045 tcc_error("invalid operands for binary operation");
2047 } else if (op
== TOK_SHR
|| op
== TOK_SAR
|| op
== TOK_SHL
) {
2048 t
= bt1
== VT_LLONG
? VT_LLONG
: VT_INT
;
2049 if ((t1
& (VT_BTYPE
| VT_UNSIGNED
)) == (t
| VT_UNSIGNED
))
2052 } else if (bt1
== VT_LLONG
|| bt2
== VT_LLONG
) {
2053 /* cast to biggest op */
2055 /* convert to unsigned if it does not fit in a long long */
2056 if ((t1
& (VT_BTYPE
| VT_UNSIGNED
)) == (VT_LLONG
| VT_UNSIGNED
) ||
2057 (t2
& (VT_BTYPE
| VT_UNSIGNED
)) == (VT_LLONG
| VT_UNSIGNED
))
2061 /* integer operations */
2063 /* convert to unsigned if it does not fit in an integer */
2064 if ((t1
& (VT_BTYPE
| VT_UNSIGNED
)) == (VT_INT
| VT_UNSIGNED
) ||
2065 (t2
& (VT_BTYPE
| VT_UNSIGNED
)) == (VT_INT
| VT_UNSIGNED
))
2068 /* XXX: currently, some unsigned operations are explicit, so
2069 we modify them here */
2070 if (t
& VT_UNSIGNED
) {
2077 else if (op
== TOK_LT
)
2079 else if (op
== TOK_GT
)
2081 else if (op
== TOK_LE
)
2083 else if (op
== TOK_GE
)
2090 /* special case for shifts and long long: we keep the shift as
2092 if (op
== TOK_SHR
|| op
== TOK_SAR
|| op
== TOK_SHL
)
2099 if (op
>= TOK_ULT
&& op
<= TOK_GT
) {
2100 /* relationnal op: the result is an int */
2101 vtop
->type
.t
= VT_INT
;
2106 // Make sure that we have converted to an rvalue:
2107 if (vtop
->r
& VT_LVAL
&& !nocode_wanted
)
2108 gv(is_float(vtop
->type
.t
& VT_BTYPE
) ? RC_FLOAT
: RC_INT
);
2111 #ifndef TCC_TARGET_ARM
2112 /* generic itof for unsigned long long case */
2113 static void gen_cvt_itof1(int t
)
2115 #ifdef TCC_TARGET_ARM64
2118 if ((vtop
->type
.t
& (VT_BTYPE
| VT_UNSIGNED
)) ==
2119 (VT_LLONG
| VT_UNSIGNED
)) {
2122 vpush_global_sym(&func_old_type
, TOK___floatundisf
);
2123 #if LDOUBLE_SIZE != 8
2124 else if (t
== VT_LDOUBLE
)
2125 vpush_global_sym(&func_old_type
, TOK___floatundixf
);
2128 vpush_global_sym(&func_old_type
, TOK___floatundidf
);
2132 vtop
->r
= reg_fret(t
);
2140 /* generic ftoi for unsigned long long case */
2141 static void gen_cvt_ftoi1(int t
)
2143 #ifdef TCC_TARGET_ARM64
2148 if (t
== (VT_LLONG
| VT_UNSIGNED
)) {
2149 /* not handled natively */
2150 st
= vtop
->type
.t
& VT_BTYPE
;
2152 vpush_global_sym(&func_old_type
, TOK___fixunssfdi
);
2153 #if LDOUBLE_SIZE != 8
2154 else if (st
== VT_LDOUBLE
)
2155 vpush_global_sym(&func_old_type
, TOK___fixunsxfdi
);
2158 vpush_global_sym(&func_old_type
, TOK___fixunsdfdi
);
2163 vtop
->r2
= REG_LRET
;
2170 /* force char or short cast */
2171 static void force_charshort_cast(int t
)
2175 /* XXX: add optimization if lvalue : just change type and offset */
2180 if (t
& VT_UNSIGNED
) {
2181 vpushi((1 << bits
) - 1);
2184 if ((vtop
->type
.t
& VT_BTYPE
) == VT_LLONG
)
2190 /* result must be signed or the SAR is converted to an SHL
2191 This was not the case when "t" was a signed short
2192 and the last value on the stack was an unsigned int */
2193 vtop
->type
.t
&= ~VT_UNSIGNED
;
2199 /* cast 'vtop' to 'type'. Casting to bitfields is forbidden. */
2200 static void gen_cast(CType
*type
)
2202 int sbt
, dbt
, sf
, df
, c
, p
;
2204 /* special delayed cast for char/short */
2205 /* XXX: in some cases (multiple cascaded casts), it may still
2207 if (vtop
->r
& VT_MUSTCAST
) {
2208 vtop
->r
&= ~VT_MUSTCAST
;
2209 force_charshort_cast(vtop
->type
.t
);
2212 /* bitfields first get cast to ints */
2213 if (vtop
->type
.t
& VT_BITFIELD
&& !nocode_wanted
) {
2217 dbt
= type
->t
& (VT_BTYPE
| VT_UNSIGNED
);
2218 sbt
= vtop
->type
.t
& (VT_BTYPE
| VT_UNSIGNED
);
2223 c
= (vtop
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) == VT_CONST
;
2224 p
= (vtop
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) == (VT_CONST
| VT_SYM
);
2226 /* constant case: we can do it now */
2227 /* XXX: in ISOC, cannot do it if error in convert */
2228 if (sbt
== VT_FLOAT
)
2229 vtop
->c
.ld
= vtop
->c
.f
;
2230 else if (sbt
== VT_DOUBLE
)
2231 vtop
->c
.ld
= vtop
->c
.d
;
2234 if ((sbt
& VT_BTYPE
) == VT_LLONG
) {
2235 if ((sbt
& VT_UNSIGNED
) || !(vtop
->c
.i
>> 63))
2236 vtop
->c
.ld
= vtop
->c
.i
;
2238 vtop
->c
.ld
= -(long double)-vtop
->c
.i
;
2240 if ((sbt
& VT_UNSIGNED
) || !(vtop
->c
.i
>> 31))
2241 vtop
->c
.ld
= (uint32_t)vtop
->c
.i
;
2243 vtop
->c
.ld
= -(long double)-(uint32_t)vtop
->c
.i
;
2246 if (dbt
== VT_FLOAT
)
2247 vtop
->c
.f
= (float)vtop
->c
.ld
;
2248 else if (dbt
== VT_DOUBLE
)
2249 vtop
->c
.d
= (double)vtop
->c
.ld
;
2250 } else if (sf
&& dbt
== (VT_LLONG
|VT_UNSIGNED
)) {
2251 vtop
->c
.i
= vtop
->c
.ld
;
2252 } else if (sf
&& dbt
== VT_BOOL
) {
2253 vtop
->c
.i
= (vtop
->c
.ld
!= 0);
2256 vtop
->c
.i
= vtop
->c
.ld
;
2257 else if (sbt
== (VT_LLONG
|VT_UNSIGNED
))
2259 else if (sbt
& VT_UNSIGNED
)
2260 vtop
->c
.i
= (uint32_t)vtop
->c
.i
;
2261 #if defined(TCC_TARGET_ARM64) || defined(TCC_TARGET_X86_64)
2262 else if (sbt
== VT_PTR
)
2265 else if (sbt
!= VT_LLONG
)
2266 vtop
->c
.i
= ((uint32_t)vtop
->c
.i
|
2267 -(vtop
->c
.i
& 0x80000000));
2269 if (dbt
== (VT_LLONG
|VT_UNSIGNED
))
2271 else if (dbt
== VT_BOOL
)
2272 vtop
->c
.i
= (vtop
->c
.i
!= 0);
2273 #if defined(TCC_TARGET_ARM64) || defined(TCC_TARGET_X86_64)
2274 else if (dbt
== VT_PTR
)
2277 else if (dbt
!= VT_LLONG
) {
2278 uint32_t m
= ((dbt
& VT_BTYPE
) == VT_BYTE
? 0xff :
2279 (dbt
& VT_BTYPE
) == VT_SHORT
? 0xffff :
2282 if (!(dbt
& VT_UNSIGNED
))
2283 vtop
->c
.i
|= -(vtop
->c
.i
& ((m
>> 1) + 1));
2286 } else if (p
&& dbt
== VT_BOOL
) {
2289 } else if (!nocode_wanted
) {
2290 /* non constant case: generate code */
2292 /* convert from fp to fp */
2295 /* convert int to fp */
2298 /* convert fp to int */
2299 if (dbt
== VT_BOOL
) {
2303 /* we handle char/short/etc... with generic code */
2304 if (dbt
!= (VT_INT
| VT_UNSIGNED
) &&
2305 dbt
!= (VT_LLONG
| VT_UNSIGNED
) &&
2309 if (dbt
== VT_INT
&& (type
->t
& (VT_BTYPE
| VT_UNSIGNED
)) != dbt
) {
2310 /* additional cast for char/short... */
2315 #if !defined(TCC_TARGET_ARM64) && !defined(TCC_TARGET_X86_64)
2316 } else if ((dbt
& VT_BTYPE
) == VT_LLONG
) {
2317 if ((sbt
& VT_BTYPE
) != VT_LLONG
) {
2318 /* scalar to long long */
2319 /* machine independent conversion */
2321 /* generate high word */
2322 if (sbt
== (VT_INT
| VT_UNSIGNED
)) {
2326 if (sbt
== VT_PTR
) {
2327 /* cast from pointer to int before we apply
2328 shift operation, which pointers don't support*/
2329 gen_cast(&int_type
);
2335 /* patch second register */
2336 vtop
[-1].r2
= vtop
->r
;
2340 } else if ((dbt
& VT_BTYPE
) == VT_LLONG
||
2341 (dbt
& VT_BTYPE
) == VT_PTR
||
2342 (dbt
& VT_BTYPE
) == VT_FUNC
) {
2343 if ((sbt
& VT_BTYPE
) != VT_LLONG
&&
2344 (sbt
& VT_BTYPE
) != VT_PTR
&&
2345 (sbt
& VT_BTYPE
) != VT_FUNC
) {
2346 /* need to convert from 32bit to 64bit */
2348 if (sbt
!= (VT_INT
| VT_UNSIGNED
)) {
2349 #if defined(TCC_TARGET_ARM64)
2351 #elif defined(TCC_TARGET_X86_64)
2353 /* x86_64 specific: movslq */
2355 o(0xc0 + (REG_VALUE(r
) << 3) + REG_VALUE(r
));
2362 } else if (dbt
== VT_BOOL
) {
2363 /* scalar to bool */
2366 } else if ((dbt
& VT_BTYPE
) == VT_BYTE
||
2367 (dbt
& VT_BTYPE
) == VT_SHORT
) {
2368 if (sbt
== VT_PTR
) {
2369 vtop
->type
.t
= VT_INT
;
2370 tcc_warning("nonportable conversion from pointer to char/short");
2372 force_charshort_cast(dbt
);
2373 } else if ((dbt
& VT_BTYPE
) == VT_INT
) {
2375 if ((sbt
& VT_BTYPE
) == VT_LLONG
) {
2376 /* from long long: just take low order word */
2380 /* if lvalue and single word type, nothing to do because
2381 the lvalue already contains the real type size (see
2382 VT_LVAL_xxx constants) */
2385 } else if ((dbt
& VT_BTYPE
) == VT_PTR
&& !(vtop
->r
& VT_LVAL
)) {
2386 /* if we are casting between pointer types,
2387 we must update the VT_LVAL_xxx size */
2388 vtop
->r
= (vtop
->r
& ~VT_LVAL_TYPE
)
2389 | (lvalue_type(type
->ref
->type
.t
) & VT_LVAL_TYPE
);
2394 /* return type size as known at compile time. Put alignment at 'a' */
2395 ST_FUNC
int type_size(CType
*type
, int *a
)
2400 bt
= type
->t
& VT_BTYPE
;
2401 if (bt
== VT_STRUCT
) {
2406 } else if (bt
== VT_PTR
) {
2407 if (type
->t
& VT_ARRAY
) {
2411 ts
= type_size(&s
->type
, a
);
2413 if (ts
< 0 && s
->c
< 0)
2421 } else if (bt
== VT_LDOUBLE
) {
2423 return LDOUBLE_SIZE
;
2424 } else if (bt
== VT_DOUBLE
|| bt
== VT_LLONG
) {
2425 #ifdef TCC_TARGET_I386
2426 #ifdef TCC_TARGET_PE
2431 #elif defined(TCC_TARGET_ARM)
2441 } else if (bt
== VT_INT
|| bt
== VT_FLOAT
) {
2444 } else if (bt
== VT_SHORT
) {
2447 } else if (bt
== VT_QLONG
|| bt
== VT_QFLOAT
) {
2450 } else if (bt
== VT_ENUM
) {
2452 /* Enums might be incomplete, so don't just return '4' here. */
2453 return type
->ref
->c
;
2455 /* char, void, function, _Bool */
2461 /* push type size as known at runtime time on top of value stack. Put
2463 ST_FUNC
void vla_runtime_type_size(CType
*type
, int *a
)
2465 if (type
->t
& VT_VLA
) {
2466 type_size(&type
->ref
->type
, a
);
2467 vset(&int_type
, VT_LOCAL
|VT_LVAL
, type
->ref
->c
);
2469 vpushi(type_size(type
, a
));
2473 static void vla_sp_restore(void) {
2474 if (vlas_in_scope
) {
2475 gen_vla_sp_restore(vla_sp_loc
);
2479 static void vla_sp_restore_root(void) {
2480 if (vlas_in_scope
) {
2481 gen_vla_sp_restore(vla_sp_root_loc
);
2485 /* return the pointed type of t */
2486 static inline CType
*pointed_type(CType
*type
)
2488 return &type
->ref
->type
;
2491 /* modify type so that its it is a pointer to type. */
2492 ST_FUNC
void mk_pointer(CType
*type
)
2495 s
= sym_push(SYM_FIELD
, type
, 0, -1);
2496 type
->t
= VT_PTR
| (type
->t
& ~VT_TYPE
);
2500 /* compare function types. OLD functions match any new functions */
2501 static int is_compatible_func(CType
*type1
, CType
*type2
)
2507 if (!is_compatible_types(&s1
->type
, &s2
->type
))
2509 /* check func_call */
2510 if (s1
->a
.func_call
!= s2
->a
.func_call
)
2512 /* XXX: not complete */
2513 if (s1
->c
== FUNC_OLD
|| s2
->c
== FUNC_OLD
)
2517 while (s1
!= NULL
) {
2520 if (!is_compatible_parameter_types(&s1
->type
, &s2
->type
))
2530 /* return true if type1 and type2 are the same. If unqualified is
2531 true, qualifiers on the types are ignored.
2533 - enums are not checked as gcc __builtin_types_compatible_p ()
2535 static int compare_types(CType
*type1
, CType
*type2
, int unqualified
)
2539 t1
= type1
->t
& VT_TYPE
;
2540 t2
= type2
->t
& VT_TYPE
;
2542 /* strip qualifiers before comparing */
2543 t1
&= ~(VT_CONSTANT
| VT_VOLATILE
);
2544 t2
&= ~(VT_CONSTANT
| VT_VOLATILE
);
2546 /* Default Vs explicit signedness only matters for char */
2547 if ((t1
& VT_BTYPE
) != VT_BYTE
) {
2551 /* XXX: bitfields ? */
2554 /* test more complicated cases */
2555 bt1
= t1
& VT_BTYPE
;
2556 if (bt1
== VT_PTR
) {
2557 type1
= pointed_type(type1
);
2558 type2
= pointed_type(type2
);
2559 return is_compatible_types(type1
, type2
);
2560 } else if (bt1
== VT_STRUCT
) {
2561 return (type1
->ref
== type2
->ref
);
2562 } else if (bt1
== VT_FUNC
) {
2563 return is_compatible_func(type1
, type2
);
2569 /* return true if type1 and type2 are exactly the same (including
2572 static int is_compatible_types(CType
*type1
, CType
*type2
)
2574 return compare_types(type1
,type2
,0);
2577 /* return true if type1 and type2 are the same (ignoring qualifiers).
2579 static int is_compatible_parameter_types(CType
*type1
, CType
*type2
)
2581 return compare_types(type1
,type2
,1);
2584 /* print a type. If 'varstr' is not NULL, then the variable is also
2585 printed in the type */
2587 /* XXX: add array and function pointers */
2588 static void type_to_str(char *buf
, int buf_size
,
2589 CType
*type
, const char *varstr
)
2596 t
= type
->t
& VT_TYPE
;
2599 if (t
& VT_CONSTANT
)
2600 pstrcat(buf
, buf_size
, "const ");
2601 if (t
& VT_VOLATILE
)
2602 pstrcat(buf
, buf_size
, "volatile ");
2603 if ((t
& (VT_DEFSIGN
| VT_UNSIGNED
)) == (VT_DEFSIGN
| VT_UNSIGNED
))
2604 pstrcat(buf
, buf_size
, "unsigned ");
2605 else if (t
& VT_DEFSIGN
)
2606 pstrcat(buf
, buf_size
, "signed ");
2636 tstr
= "long double";
2638 pstrcat(buf
, buf_size
, tstr
);
2642 if (bt
== VT_STRUCT
)
2646 pstrcat(buf
, buf_size
, tstr
);
2647 v
= type
->ref
->v
& ~SYM_STRUCT
;
2648 if (v
>= SYM_FIRST_ANOM
)
2649 pstrcat(buf
, buf_size
, "<anonymous>");
2651 pstrcat(buf
, buf_size
, get_tok_str(v
, NULL
));
2655 type_to_str(buf
, buf_size
, &s
->type
, varstr
);
2656 pstrcat(buf
, buf_size
, "(");
2658 while (sa
!= NULL
) {
2659 type_to_str(buf1
, sizeof(buf1
), &sa
->type
, NULL
);
2660 pstrcat(buf
, buf_size
, buf1
);
2663 pstrcat(buf
, buf_size
, ", ");
2665 pstrcat(buf
, buf_size
, ")");
2670 snprintf(buf1
, sizeof(buf1
), "%s[%ld]", varstr
? varstr
: "", s
->c
);
2671 type_to_str(buf
, buf_size
, &s
->type
, buf1
);
2674 pstrcpy(buf1
, sizeof(buf1
), "*");
2675 if (t
& VT_CONSTANT
)
2676 pstrcat(buf1
, buf_size
, "const ");
2677 if (t
& VT_VOLATILE
)
2678 pstrcat(buf1
, buf_size
, "volatile ");
2680 pstrcat(buf1
, sizeof(buf1
), varstr
);
2681 type_to_str(buf
, buf_size
, &s
->type
, buf1
);
2685 pstrcat(buf
, buf_size
, " ");
2686 pstrcat(buf
, buf_size
, varstr
);
2691 /* verify type compatibility to store vtop in 'dt' type, and generate
2693 static void gen_assign_cast(CType
*dt
)
2695 CType
*st
, *type1
, *type2
, tmp_type1
, tmp_type2
;
2696 char buf1
[256], buf2
[256];
2699 st
= &vtop
->type
; /* source type */
2700 dbt
= dt
->t
& VT_BTYPE
;
2701 sbt
= st
->t
& VT_BTYPE
;
2702 if (sbt
== VT_VOID
|| dbt
== VT_VOID
) {
2703 if (sbt
== VT_VOID
&& dbt
== VT_VOID
)
2705 It is Ok if both are void
2711 gcc accepts this program
2714 tcc_error("cannot cast from/to void");
2716 if (dt
->t
& VT_CONSTANT
)
2717 tcc_warning("assignment of read-only location");
2720 /* special cases for pointers */
2721 /* '0' can also be a pointer */
2722 if (is_null_pointer(vtop
))
2724 /* accept implicit pointer to integer cast with warning */
2725 if (is_integer_btype(sbt
)) {
2726 tcc_warning("assignment makes pointer from integer without a cast");
2729 type1
= pointed_type(dt
);
2730 /* a function is implicitely a function pointer */
2731 if (sbt
== VT_FUNC
) {
2732 if ((type1
->t
& VT_BTYPE
) != VT_VOID
&&
2733 !is_compatible_types(pointed_type(dt
), st
))
2734 tcc_warning("assignment from incompatible pointer type");
2739 type2
= pointed_type(st
);
2740 if ((type1
->t
& VT_BTYPE
) == VT_VOID
||
2741 (type2
->t
& VT_BTYPE
) == VT_VOID
) {
2742 /* void * can match anything */
2744 /* exact type match, except for unsigned */
2747 tmp_type1
.t
&= ~(VT_DEFSIGN
| VT_UNSIGNED
| VT_CONSTANT
|
2749 tmp_type2
.t
&= ~(VT_DEFSIGN
| VT_UNSIGNED
| VT_CONSTANT
|
2751 if (!is_compatible_types(&tmp_type1
, &tmp_type2
))
2752 tcc_warning("assignment from incompatible pointer type");
2754 /* check const and volatile */
2755 if ((!(type1
->t
& VT_CONSTANT
) && (type2
->t
& VT_CONSTANT
)) ||
2756 (!(type1
->t
& VT_VOLATILE
) && (type2
->t
& VT_VOLATILE
)))
2757 tcc_warning("assignment discards qualifiers from pointer target type");
2763 if (sbt
== VT_PTR
|| sbt
== VT_FUNC
) {
2764 tcc_warning("assignment makes integer from pointer without a cast");
2765 } else if (sbt
== VT_STRUCT
) {
2766 goto case_VT_STRUCT
;
2768 /* XXX: more tests */
2774 tmp_type1
.t
&= ~(VT_CONSTANT
| VT_VOLATILE
);
2775 tmp_type2
.t
&= ~(VT_CONSTANT
| VT_VOLATILE
);
2776 if (!is_compatible_types(&tmp_type1
, &tmp_type2
)) {
2778 type_to_str(buf1
, sizeof(buf1
), st
, NULL
);
2779 type_to_str(buf2
, sizeof(buf2
), dt
, NULL
);
2780 tcc_error("cannot cast '%s' to '%s'", buf1
, buf2
);
2788 /* store vtop in lvalue pushed on stack */
2789 ST_FUNC
void vstore(void)
2791 int sbt
, dbt
, ft
, r
, t
, size
, align
, bit_size
, bit_pos
, rc
, delayed_cast
;
2793 ft
= vtop
[-1].type
.t
;
2794 sbt
= vtop
->type
.t
& VT_BTYPE
;
2795 dbt
= ft
& VT_BTYPE
;
2796 if ((((sbt
== VT_INT
|| sbt
== VT_SHORT
) && dbt
== VT_BYTE
) ||
2797 (sbt
== VT_INT
&& dbt
== VT_SHORT
))
2798 && !(vtop
->type
.t
& VT_BITFIELD
)) {
2799 /* optimize char/short casts */
2800 delayed_cast
= VT_MUSTCAST
;
2801 vtop
->type
.t
= (ft
& VT_TYPE
& ~VT_BITFIELD
&
2802 ((1 << VT_STRUCT_SHIFT
) - 1));
2803 /* XXX: factorize */
2804 if (ft
& VT_CONSTANT
)
2805 tcc_warning("assignment of read-only location");
2808 if (!(ft
& VT_BITFIELD
))
2809 gen_assign_cast(&vtop
[-1].type
);
2812 if (sbt
== VT_STRUCT
) {
2813 /* if structure, only generate pointer */
2814 /* structure assignment : generate memcpy */
2815 /* XXX: optimize if small size */
2816 if (!nocode_wanted
) {
2817 size
= type_size(&vtop
->type
, &align
);
2821 vtop
->type
.t
= VT_PTR
;
2824 /* address of memcpy() */
2827 vpush_global_sym(&func_old_type
, TOK_memcpy8
);
2828 else if(!(align
& 3))
2829 vpush_global_sym(&func_old_type
, TOK_memcpy4
);
2832 /* Use memmove, rather than memcpy, as dest and src may be same: */
2833 vpush_global_sym(&func_old_type
, TOK_memmove
);
2838 vtop
->type
.t
= VT_PTR
;
2847 /* leave source on stack */
2848 } else if (ft
& VT_BITFIELD
) {
2849 /* bitfield store handling */
2851 /* save lvalue as expression result (example: s.b = s.a = n;) */
2852 vdup(), vtop
[-1] = vtop
[-2];
2854 bit_pos
= (ft
>> VT_STRUCT_SHIFT
) & 0x3f;
2855 bit_size
= (ft
>> (VT_STRUCT_SHIFT
+ 6)) & 0x3f;
2856 /* remove bit field info to avoid loops */
2857 vtop
[-1].type
.t
= ft
& ~VT_BITFIELD
& ((1 << VT_STRUCT_SHIFT
) - 1);
2859 if((ft
& VT_BTYPE
) == VT_BOOL
) {
2860 gen_cast(&vtop
[-1].type
);
2861 vtop
[-1].type
.t
= (vtop
[-1].type
.t
& ~VT_BTYPE
) | (VT_BYTE
| VT_UNSIGNED
);
2864 /* duplicate destination */
2866 vtop
[-1] = vtop
[-2];
2868 /* mask and shift source */
2869 if((ft
& VT_BTYPE
) != VT_BOOL
) {
2870 if((ft
& VT_BTYPE
) == VT_LLONG
) {
2871 vpushll((1ULL << bit_size
) - 1ULL);
2873 vpushi((1 << bit_size
) - 1);
2879 /* load destination, mask and or with source */
2881 if((ft
& VT_BTYPE
) == VT_LLONG
) {
2882 vpushll(~(((1ULL << bit_size
) - 1ULL) << bit_pos
));
2884 vpushi(~(((1 << bit_size
) - 1) << bit_pos
));
2890 /* ... and discard */
2894 if (!nocode_wanted
) {
2895 #ifdef CONFIG_TCC_BCHECK
2896 /* bound check case */
2897 if (vtop
[-1].r
& VT_MUSTBOUND
) {
2906 #ifdef TCC_TARGET_X86_64
2907 if ((ft
& VT_BTYPE
) == VT_LDOUBLE
) {
2909 } else if ((ft
& VT_BTYPE
) == VT_QFLOAT
) {
2914 r
= gv(rc
); /* generate value */
2915 /* if lvalue was saved on stack, must read it */
2916 if ((vtop
[-1].r
& VT_VALMASK
) == VT_LLOCAL
) {
2918 t
= get_reg(RC_INT
);
2919 #if defined(TCC_TARGET_ARM64) || defined(TCC_TARGET_X86_64)
2924 sv
.r
= VT_LOCAL
| VT_LVAL
;
2925 sv
.c
.i
= vtop
[-1].c
.i
;
2927 vtop
[-1].r
= t
| VT_LVAL
;
2929 /* two word case handling : store second register at word + 4 (or +8 for x86-64) */
2930 #if defined(TCC_TARGET_ARM64) || defined(TCC_TARGET_X86_64)
2931 if (((ft
& VT_BTYPE
) == VT_QLONG
) || ((ft
& VT_BTYPE
) == VT_QFLOAT
)) {
2932 int addr_type
= VT_LLONG
, load_size
= 8, load_type
= ((vtop
->type
.t
& VT_BTYPE
) == VT_QLONG
) ? VT_LLONG
: VT_DOUBLE
;
2934 if ((ft
& VT_BTYPE
) == VT_LLONG
) {
2935 int addr_type
= VT_INT
, load_size
= 4, load_type
= VT_INT
;
2937 vtop
[-1].type
.t
= load_type
;
2940 /* convert to int to increment easily */
2941 vtop
->type
.t
= addr_type
;
2947 vtop
[-1].type
.t
= load_type
;
2948 /* XXX: it works because r2 is spilled last ! */
2949 store(vtop
->r2
, vtop
- 1);
2955 vtop
--; /* NOT vpop() because on x86 it would flush the fp stack */
2956 vtop
->r
|= delayed_cast
;
2960 /* post defines POST/PRE add. c is the token ++ or -- */
2961 ST_FUNC
void inc(int post
, int c
)
2964 vdup(); /* save lvalue */
2967 gv_dup(); /* duplicate value */
2969 vdup(); /* duplicate value */
2974 vpushi(c
- TOK_MID
);
2976 vstore(); /* store value */
2978 vpop(); /* if post op, return saved value */
2981 /* Parse GNUC __attribute__ extension. Currently, the following
2982 extensions are recognized:
2983 - aligned(n) : set data/function alignment.
2984 - packed : force data alignment to 1
2985 - section(x) : generate data/code in this section.
2986 - unused : currently ignored, but may be used someday.
2987 - regparm(n) : pass function parameters in registers (i386 only)
2989 static void parse_attribute(AttributeDef
*ad
)
2993 while (tok
== TOK_ATTRIBUTE1
|| tok
== TOK_ATTRIBUTE2
) {
2997 while (tok
!= ')') {
2998 if (tok
< TOK_IDENT
)
2999 expect("attribute name");
3007 expect("section name");
3008 ad
->section
= find_section(tcc_state
, (char *)tokc
.str
.data
);
3016 expect("alias(\"target\")");
3017 ad
->alias_target
= /* save string as token, for later */
3018 tok_alloc((char*)tokc
.str
.data
, tokc
.str
.size
-1)->tok
;
3022 case TOK_VISIBILITY1
:
3023 case TOK_VISIBILITY2
:
3026 expect("visibility(\"default|hidden|internal|protected\")");
3027 if (!strcmp (tokc
.str
.data
, "default"))
3028 ad
->a
.visibility
= STV_DEFAULT
;
3029 else if (!strcmp (tokc
.str
.data
, "hidden"))
3030 ad
->a
.visibility
= STV_HIDDEN
;
3031 else if (!strcmp (tokc
.str
.data
, "internal"))
3032 ad
->a
.visibility
= STV_INTERNAL
;
3033 else if (!strcmp (tokc
.str
.data
, "protected"))
3034 ad
->a
.visibility
= STV_PROTECTED
;
3036 expect("visibility(\"default|hidden|internal|protected\")");
3045 if (n
<= 0 || (n
& (n
- 1)) != 0)
3046 tcc_error("alignment must be a positive power of two");
3063 /* currently, no need to handle it because tcc does not
3064 track unused objects */
3068 /* currently, no need to handle it because tcc does not
3069 track unused objects */
3074 ad
->a
.func_call
= FUNC_CDECL
;
3079 ad
->a
.func_call
= FUNC_STDCALL
;
3081 #ifdef TCC_TARGET_I386
3091 ad
->a
.func_call
= FUNC_FASTCALL1
+ n
- 1;
3097 ad
->a
.func_call
= FUNC_FASTCALLW
;
3104 ad
->a
.mode
= VT_LLONG
+ 1;
3107 ad
->a
.mode
= VT_BYTE
+ 1;
3110 ad
->a
.mode
= VT_SHORT
+ 1;
3114 ad
->a
.mode
= VT_INT
+ 1;
3117 tcc_warning("__mode__(%s) not supported\n", get_tok_str(tok
, NULL
));
3124 ad
->a
.func_export
= 1;
3127 ad
->a
.func_import
= 1;
3130 if (tcc_state
->warn_unsupported
)
3131 tcc_warning("'%s' attribute ignored", get_tok_str(t
, NULL
));
3132 /* skip parameters */
3134 int parenthesis
= 0;
3138 else if (tok
== ')')
3141 } while (parenthesis
&& tok
!= -1);
3154 /* enum/struct/union declaration. u is either VT_ENUM or VT_STRUCT */
3155 static void struct_decl(CType
*type
, AttributeDef
*ad
, int u
)
3157 int a
, v
, size
, align
, maxalign
, c
, offset
, flexible
, extra_bytes
;
3158 int bit_size
, bit_pos
, bsize
, bt
, lbit_pos
, prevbt
;
3159 Sym
*s
, *ss
, *ass
, **ps
;
3163 a
= tok
; /* save decl type */
3165 if (tok
== TOK_ATTRIBUTE1
|| tok
== TOK_ATTRIBUTE2
) {
3166 parse_attribute(ad
);
3172 /* struct already defined ? return it */
3174 expect("struct/union/enum name");
3176 if (s
&& (s
->scope
== local_scope
|| (tok
!= '{' && tok
!= ';'))) {
3178 tcc_error("redefinition of '%s'", get_tok_str(v
, NULL
));
3186 /* we put an undefined size for struct/union */
3187 s
= sym_push(v
| SYM_STRUCT
, &type1
, 0, -1);
3188 s
->r
= 0; /* default alignment is zero as gcc */
3189 /* put struct/union/enum name in type */
3197 tcc_error("struct/union/enum already defined");
3198 /* cannot be empty */
3200 /* non empty enums are not allowed */
3201 if (a
== TOK_ENUM
) {
3205 expect("identifier");
3207 if (ss
&& !local_stack
)
3208 tcc_error("redefinition of enumerator '%s'",
3209 get_tok_str(v
, NULL
));
3215 /* enum symbols have static storage */
3216 ss
= sym_push(v
, &int_type
, VT_CONST
, c
);
3217 ss
->type
.t
|= VT_STATIC
;
3222 /* NOTE: we accept a trailing comma */
3226 s
->c
= type_size(&int_type
, &align
);
3235 while (tok
!= '}') {
3236 parse_btype(&btype
, &ad1
);
3240 tcc_error("flexible array member '%s' not at the end of struct",
3241 get_tok_str(v
, NULL
));
3246 type_decl(&type1
, &ad1
, &v
, TYPE_DIRECT
| TYPE_ABSTRACT
);
3248 if ((type1
.t
& VT_BTYPE
) != VT_STRUCT
)
3249 expect("identifier");
3251 int v
= btype
.ref
->v
;
3252 if (!(v
& SYM_FIELD
) && (v
& ~SYM_STRUCT
) < SYM_FIRST_ANOM
) {
3253 if (tcc_state
->ms_extensions
== 0)
3254 expect("identifier");
3258 if (type_size(&type1
, &align
) < 0) {
3259 if ((a
== TOK_STRUCT
) && (type1
.t
& VT_ARRAY
) && c
)
3262 tcc_error("field '%s' has incomplete type",
3263 get_tok_str(v
, NULL
));
3265 if ((type1
.t
& VT_BTYPE
) == VT_FUNC
||
3266 (type1
.t
& (VT_TYPEDEF
| VT_STATIC
| VT_EXTERN
| VT_INLINE
)))
3267 tcc_error("invalid type for '%s'",
3268 get_tok_str(v
, NULL
));
3272 bit_size
= expr_const();
3273 /* XXX: handle v = 0 case for messages */
3275 tcc_error("negative width in bit-field '%s'",
3276 get_tok_str(v
, NULL
));
3277 if (v
&& bit_size
== 0)
3278 tcc_error("zero width for bit-field '%s'",
3279 get_tok_str(v
, NULL
));
3281 size
= type_size(&type1
, &align
);
3282 if (ad1
.a
.aligned
) {
3283 if (align
< ad1
.a
.aligned
)
3284 align
= ad1
.a
.aligned
;
3285 } else if (ad1
.a
.packed
) {
3287 } else if (*tcc_state
->pack_stack_ptr
) {
3288 if (align
> *tcc_state
->pack_stack_ptr
)
3289 align
= *tcc_state
->pack_stack_ptr
;
3292 if (bit_size
>= 0) {
3293 bt
= type1
.t
& VT_BTYPE
;
3300 tcc_error("bitfields must have scalar type");
3302 if (bit_size
> bsize
) {
3303 tcc_error("width of '%s' exceeds its type",
3304 get_tok_str(v
, NULL
));
3305 } else if (bit_size
== bsize
) {
3306 /* no need for bit fields */
3308 } else if (bit_size
== 0) {
3309 /* XXX: what to do if only padding in a
3311 /* zero size: means to pad */
3314 /* if type change, union, or will overrun
3315 * allignment slot, start at a newly
3317 if ((bit_pos
+ bit_size
) > bsize
||
3318 bt
!= prevbt
|| a
== TOK_UNION
)
3321 /* XXX: handle LSB first */
3322 type1
.t
|= VT_BITFIELD
|
3323 (bit_pos
<< VT_STRUCT_SHIFT
) |
3324 (bit_size
<< (VT_STRUCT_SHIFT
+ 6));
3325 bit_pos
+= bit_size
;
3326 /* without ms-bitfields, allocate the
3327 * minimum number of bytes necessary,
3328 * adding single bytes as needed */
3329 if (!tcc_state
->ms_bitfields
) {
3331 /* minimum bytes for new bitfield */
3332 size
= (bit_size
+ 7) / 8;
3334 /* enough spare bits already allocated? */
3335 bit_size
= (lbit_pos
- 1) % 8 + 1 + bit_size
;
3336 if (bit_size
> 8) /* doesn't fit */
3337 extra_bytes
= (bit_size
- 1) / 8;
3345 if (v
!= 0 || (type1
.t
& VT_BTYPE
) == VT_STRUCT
) {
3346 /* add new memory data only if starting bit
3347 field or adding bytes to existing bit field */
3348 if (extra_bytes
) c
+= extra_bytes
;
3349 else if (lbit_pos
== 0) {
3350 if (a
== TOK_STRUCT
) {
3351 c
= (c
+ align
- 1) & -align
;
3360 if (align
> maxalign
)
3364 printf("add field %s offset=%d",
3365 get_tok_str(v
, NULL
), offset
);
3366 if (type1
.t
& VT_BITFIELD
) {
3367 printf(" pos=%d size=%d",
3368 (type1
.t
>> VT_STRUCT_SHIFT
) & 0x3f,
3369 (type1
.t
>> (VT_STRUCT_SHIFT
+ 6)) & 0x3f);
3374 if (v
== 0 && (type1
.t
& VT_BTYPE
) == VT_STRUCT
) {
3376 while ((ass
= ass
->next
) != NULL
) {
3377 ss
= sym_push(ass
->v
, &ass
->type
, 0, offset
+ ass
->c
);
3382 ss
= sym_push(v
| SYM_FIELD
, &type1
, 0, offset
);
3386 if (tok
== ';' || tok
== TOK_EOF
)
3393 /* store size and alignment */
3394 s
->c
= (c
+ maxalign
- 1) & -maxalign
;
3400 /* return 1 if basic type is a type size (short, long, long long) */
3401 ST_FUNC
int is_btype_size(int bt
)
3403 return bt
== VT_SHORT
|| bt
== VT_LONG
|| bt
== VT_LLONG
;
3406 /* Add type qualifiers to a type. If the type is an array then the qualifiers
3407 are added to the element type, copied because it could be a typedef. */
3408 static void parse_btype_qualify(CType
*type
, int qualifiers
)
3410 while (type
->t
& VT_ARRAY
) {
3411 type
->ref
= sym_push(SYM_FIELD
, &type
->ref
->type
, 0, type
->ref
->c
);
3412 type
= &type
->ref
->type
;
3414 type
->t
|= qualifiers
;
3417 /* return 0 if no type declaration. otherwise, return the basic type
3420 static int parse_btype(CType
*type
, AttributeDef
*ad
)
3422 int t
, u
, bt_size
, complete
, type_found
, typespec_found
;
3426 memset(ad
, 0, sizeof(AttributeDef
));
3434 /* currently, we really ignore extension */
3445 tcc_error("too many basic types");
3447 bt_size
= is_btype_size (u
& VT_BTYPE
);
3448 if (u
== VT_INT
|| (!bt_size
&& !(t
& VT_TYPEDEF
)))
3463 if ((t
& VT_BTYPE
) == VT_DOUBLE
) {
3464 #ifndef TCC_TARGET_PE
3465 t
= (t
& ~VT_BTYPE
) | VT_LDOUBLE
;
3467 } else if ((t
& VT_BTYPE
) == VT_LONG
) {
3468 t
= (t
& ~VT_BTYPE
) | VT_LLONG
;
3474 #ifdef TCC_TARGET_ARM64
3476 /* GCC's __uint128_t appears in some Linux header files. Make it a
3477 synonym for long double to get the size and alignment right. */
3489 if ((t
& VT_BTYPE
) == VT_LONG
) {
3490 #ifdef TCC_TARGET_PE
3491 t
= (t
& ~VT_BTYPE
) | VT_DOUBLE
;
3493 t
= (t
& ~VT_BTYPE
) | VT_LDOUBLE
;
3501 struct_decl(&type1
, ad
, VT_ENUM
);
3504 type
->ref
= type1
.ref
;
3508 struct_decl(&type1
, ad
, VT_STRUCT
);
3511 /* type modifiers */
3516 parse_btype_qualify(type
, VT_CONSTANT
);
3524 parse_btype_qualify(type
, VT_VOLATILE
);
3531 if ((t
& (VT_DEFSIGN
|VT_UNSIGNED
)) == (VT_DEFSIGN
|VT_UNSIGNED
))
3532 tcc_error("signed and unsigned modifier");
3545 if ((t
& (VT_DEFSIGN
|VT_UNSIGNED
)) == VT_DEFSIGN
)
3546 tcc_error("signed and unsigned modifier");
3547 t
|= VT_DEFSIGN
| VT_UNSIGNED
;
3572 /* GNUC attribute */
3573 case TOK_ATTRIBUTE1
:
3574 case TOK_ATTRIBUTE2
:
3575 parse_attribute(ad
);
3578 t
= (t
& ~VT_BTYPE
) | u
;
3586 parse_expr_type(&type1
);
3587 /* remove all storage modifiers except typedef */
3588 type1
.t
&= ~(VT_STORAGE
&~VT_TYPEDEF
);
3594 if (!s
|| !(s
->type
.t
& VT_TYPEDEF
))
3597 type
->t
= ((s
->type
.t
& ~VT_TYPEDEF
) |
3598 (t
& ~(VT_CONSTANT
| VT_VOLATILE
)));
3599 type
->ref
= s
->type
.ref
;
3600 if (t
& (VT_CONSTANT
| VT_VOLATILE
))
3601 parse_btype_qualify(type
, t
& (VT_CONSTANT
| VT_VOLATILE
));
3605 /* get attributes from typedef */
3606 if (0 == ad
->a
.aligned
)
3607 ad
->a
.aligned
= s
->a
.aligned
;
3608 if (0 == ad
->a
.func_call
)
3609 ad
->a
.func_call
= s
->a
.func_call
;
3610 ad
->a
.packed
|= s
->a
.packed
;
3619 if (tcc_state
->char_is_unsigned
) {
3620 if ((t
& (VT_DEFSIGN
|VT_BTYPE
)) == VT_BYTE
)
3624 /* long is never used as type */
3625 if ((t
& VT_BTYPE
) == VT_LONG
)
3626 #if (!defined TCC_TARGET_X86_64 && !defined TCC_TARGET_ARM64) || \
3627 defined TCC_TARGET_PE
3628 t
= (t
& ~VT_BTYPE
) | VT_INT
;
3630 t
= (t
& ~VT_BTYPE
) | VT_LLONG
;
3636 /* convert a function parameter type (array to pointer and function to
3637 function pointer) */
3638 static inline void convert_parameter_type(CType
*pt
)
3640 /* remove const and volatile qualifiers (XXX: const could be used
3641 to indicate a const function parameter */
3642 pt
->t
&= ~(VT_CONSTANT
| VT_VOLATILE
);
3643 /* array must be transformed to pointer according to ANSI C */
3645 if ((pt
->t
& VT_BTYPE
) == VT_FUNC
) {
3650 ST_FUNC
void parse_asm_str(CString
*astr
)
3653 /* read the string */
3655 expect("string constant");
3657 while (tok
== TOK_STR
) {
3658 /* XXX: add \0 handling too ? */
3659 cstr_cat(astr
, tokc
.str
.data
, -1);
3662 cstr_ccat(astr
, '\0');
3665 /* Parse an asm label and return the token */
3666 static int asm_label_instr(void)
3672 parse_asm_str(&astr
);
3675 printf("asm_alias: \"%s\"\n", (char *)astr
.data
);
3677 v
= tok_alloc(astr
.data
, astr
.size
- 1)->tok
;
3682 static void post_type(CType
*type
, AttributeDef
*ad
)
3684 int n
, l
, t1
, arg_size
, align
;
3685 Sym
**plast
, *s
, *first
;
3690 /* function declaration */
3698 /* read param name and compute offset */
3699 if (l
!= FUNC_OLD
) {
3700 if (!parse_btype(&pt
, &ad1
)) {
3702 tcc_error("invalid type");
3709 if ((pt
.t
& VT_BTYPE
) == VT_VOID
&& tok
== ')')
3711 type_decl(&pt
, &ad1
, &n
, TYPE_DIRECT
| TYPE_ABSTRACT
);
3712 if ((pt
.t
& VT_BTYPE
) == VT_VOID
)
3713 tcc_error("parameter declared as void");
3714 arg_size
+= (type_size(&pt
, &align
) + PTR_SIZE
- 1) / PTR_SIZE
;
3719 expect("identifier");
3723 convert_parameter_type(&pt
);
3724 s
= sym_push(n
| SYM_FIELD
, &pt
, 0, 0);
3730 if (l
== FUNC_NEW
&& tok
== TOK_DOTS
) {
3737 /* if no parameters, then old type prototype */
3741 /* NOTE: const is ignored in returned type as it has a special
3742 meaning in gcc / C++ */
3743 type
->t
&= ~VT_CONSTANT
;
3744 /* some ancient pre-K&R C allows a function to return an array
3745 and the array brackets to be put after the arguments, such
3746 that "int c()[]" means something like "int[] c()" */
3749 skip(']'); /* only handle simple "[]" */
3752 /* we push a anonymous symbol which will contain the function prototype */
3753 ad
->a
.func_args
= arg_size
;
3754 s
= sym_push(SYM_FIELD
, type
, 0, l
);
3759 } else if (tok
== '[') {
3760 /* array definition */
3762 if (tok
== TOK_RESTRICT1
)
3767 if (!local_stack
|| nocode_wanted
)
3768 vpushi(expr_const());
3770 if ((vtop
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) == VT_CONST
) {
3773 tcc_error("invalid array size");
3775 if (!is_integer_btype(vtop
->type
.t
& VT_BTYPE
))
3776 tcc_error("size of variable length array should be an integer");
3781 /* parse next post type */
3782 post_type(type
, ad
);
3783 if (type
->t
== VT_FUNC
)
3784 tcc_error("declaration of an array of functions");
3785 t1
|= type
->t
& VT_VLA
;
3788 loc
-= type_size(&int_type
, &align
);
3792 vla_runtime_type_size(type
, &align
);
3794 vset(&int_type
, VT_LOCAL
|VT_LVAL
, n
);
3801 /* we push an anonymous symbol which will contain the array
3803 s
= sym_push(SYM_FIELD
, type
, 0, n
);
3804 type
->t
= (t1
? VT_VLA
: VT_ARRAY
) | VT_PTR
;
3809 /* Parse a type declaration (except basic type), and return the type
3810 in 'type'. 'td' is a bitmask indicating which kind of type decl is
3811 expected. 'type' should contain the basic type. 'ad' is the
3812 attribute definition of the basic type. It can be modified by
3815 static void type_decl(CType
*type
, AttributeDef
*ad
, int *v
, int td
)
3818 CType type1
, *type2
;
3819 int qualifiers
, storage
;
3821 while (tok
== '*') {
3829 qualifiers
|= VT_CONSTANT
;
3834 qualifiers
|= VT_VOLATILE
;
3842 type
->t
|= qualifiers
;
3845 /* XXX: clarify attribute handling */
3846 if (tok
== TOK_ATTRIBUTE1
|| tok
== TOK_ATTRIBUTE2
)
3847 parse_attribute(ad
);
3849 /* recursive type */
3850 /* XXX: incorrect if abstract type for functions (e.g. 'int ()') */
3851 type1
.t
= 0; /* XXX: same as int */
3854 /* XXX: this is not correct to modify 'ad' at this point, but
3855 the syntax is not clear */
3856 if (tok
== TOK_ATTRIBUTE1
|| tok
== TOK_ATTRIBUTE2
)
3857 parse_attribute(ad
);
3858 type_decl(&type1
, ad
, v
, td
);
3861 /* type identifier */
3862 if (tok
>= TOK_IDENT
&& (td
& TYPE_DIRECT
)) {
3866 if (!(td
& TYPE_ABSTRACT
))
3867 expect("identifier");
3871 storage
= type
->t
& VT_STORAGE
;
3872 type
->t
&= ~VT_STORAGE
;
3873 if (storage
& VT_STATIC
) {
3874 int saved_nocode_wanted
= nocode_wanted
;
3876 post_type(type
, ad
);
3877 nocode_wanted
= saved_nocode_wanted
;
3879 post_type(type
, ad
);
3881 if (tok
== TOK_ATTRIBUTE1
|| tok
== TOK_ATTRIBUTE2
)
3882 parse_attribute(ad
);
3886 /* append type at the end of type1 */
3899 /* compute the lvalue VT_LVAL_xxx needed to match type t. */
3900 ST_FUNC
int lvalue_type(int t
)
3905 if (bt
== VT_BYTE
|| bt
== VT_BOOL
)
3907 else if (bt
== VT_SHORT
)
3911 if (t
& VT_UNSIGNED
)
3912 r
|= VT_LVAL_UNSIGNED
;
3916 /* indirection with full error checking and bound check */
3917 ST_FUNC
void indir(void)
3919 if ((vtop
->type
.t
& VT_BTYPE
) != VT_PTR
) {
3920 if ((vtop
->type
.t
& VT_BTYPE
) == VT_FUNC
)
3924 if ((vtop
->r
& VT_LVAL
) && !nocode_wanted
)
3926 vtop
->type
= *pointed_type(&vtop
->type
);
3927 /* Arrays and functions are never lvalues */
3928 if (!(vtop
->type
.t
& VT_ARRAY
) && !(vtop
->type
.t
& VT_VLA
)
3929 && (vtop
->type
.t
& VT_BTYPE
) != VT_FUNC
) {
3930 vtop
->r
|= lvalue_type(vtop
->type
.t
);
3931 /* if bound checking, the referenced pointer must be checked */
3932 #ifdef CONFIG_TCC_BCHECK
3933 if (tcc_state
->do_bounds_check
)
3934 vtop
->r
|= VT_MUSTBOUND
;
3939 /* pass a parameter to a function and do type checking and casting */
3940 static void gfunc_param_typed(Sym
*func
, Sym
*arg
)
3945 func_type
= func
->c
;
3946 if (func_type
== FUNC_OLD
||
3947 (func_type
== FUNC_ELLIPSIS
&& arg
== NULL
)) {
3948 /* default casting : only need to convert float to double */
3949 if ((vtop
->type
.t
& VT_BTYPE
) == VT_FLOAT
) {
3952 } else if (vtop
->type
.t
& VT_BITFIELD
) {
3953 type
.t
= vtop
->type
.t
& (VT_BTYPE
| VT_UNSIGNED
);
3956 } else if (arg
== NULL
) {
3957 tcc_error("too many arguments to function");
3960 type
.t
&= ~VT_CONSTANT
; /* need to do that to avoid false warning */
3961 gen_assign_cast(&type
);
3965 /* parse an expression of the form '(type)' or '(expr)' and return its
3967 static void parse_expr_type(CType
*type
)
3973 if (parse_btype(type
, &ad
)) {
3974 type_decl(type
, &ad
, &n
, TYPE_ABSTRACT
);
3981 static void parse_type(CType
*type
)
3986 if (!parse_btype(type
, &ad
)) {
3989 type_decl(type
, &ad
, &n
, TYPE_ABSTRACT
);
3992 static void vpush_tokc(int t
)
3997 vsetc(&type
, VT_CONST
, &tokc
);
4000 ST_FUNC
void unary(void)
4002 int n
, t
, align
, size
, r
, sizeof_caller
;
4007 sizeof_caller
= in_sizeof
;
4009 /* XXX: GCC 2.95.3 does not generate a table although it should be
4023 vpush_tokc(VT_INT
| VT_UNSIGNED
);
4027 vpush_tokc(VT_LLONG
);
4031 vpush_tokc(VT_LLONG
| VT_UNSIGNED
);
4035 vpush_tokc(VT_FLOAT
);
4039 vpush_tokc(VT_DOUBLE
);
4043 vpush_tokc(VT_LDOUBLE
);
4046 case TOK___FUNCTION__
:
4048 goto tok_identifier
;
4054 /* special function name identifier */
4055 len
= strlen(funcname
) + 1;
4056 /* generate char[len] type */
4061 vpush_ref(&type
, data_section
, data_section
->data_offset
, len
);
4062 ptr
= section_ptr_add(data_section
, len
);
4063 memcpy(ptr
, funcname
, len
);
4068 #ifdef TCC_TARGET_PE
4069 t
= VT_SHORT
| VT_UNSIGNED
;
4075 /* string parsing */
4078 if (tcc_state
->warn_write_strings
)
4083 memset(&ad
, 0, sizeof(AttributeDef
));
4084 decl_initializer_alloc(&type
, &ad
, VT_CONST
, 2, 0, 0);
4089 if (parse_btype(&type
, &ad
)) {
4090 type_decl(&type
, &ad
, &n
, TYPE_ABSTRACT
);
4092 /* check ISOC99 compound literal */
4094 /* data is allocated locally by default */
4099 /* all except arrays are lvalues */
4100 if (!(type
.t
& VT_ARRAY
))
4101 r
|= lvalue_type(type
.t
);
4102 memset(&ad
, 0, sizeof(AttributeDef
));
4103 decl_initializer_alloc(&type
, &ad
, r
, 1, 0, 0);
4105 if (sizeof_caller
) {
4112 } else if (tok
== '{') {
4114 tcc_error("expected constant");
4115 /* save all registers */
4118 /* statement expression : we do not accept break/continue
4119 inside as GCC does */
4120 block(NULL
, NULL
, 1);
4135 /* functions names must be treated as function pointers,
4136 except for unary '&' and sizeof. Since we consider that
4137 functions are not lvalues, we only have to handle it
4138 there and in function calls. */
4139 /* arrays can also be used although they are not lvalues */
4140 if ((vtop
->type
.t
& VT_BTYPE
) != VT_FUNC
&&
4141 !(vtop
->type
.t
& VT_ARRAY
) && !(vtop
->type
.t
& VT_LLOCAL
))
4143 mk_pointer(&vtop
->type
);
4149 if ((vtop
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) == VT_CONST
) {
4151 boolean
.t
= VT_BOOL
;
4153 vtop
->c
.i
= !vtop
->c
.i
;
4154 } else if ((vtop
->r
& VT_VALMASK
) == VT_CMP
)
4158 vseti(VT_JMP
, gvtst(1, 0));
4170 if ((vtop
->type
.t
& VT_BTYPE
) == VT_PTR
)
4171 tcc_error("pointer not accepted for unary plus");
4172 /* In order to force cast, we add zero, except for floating point
4173 where we really need an noop (otherwise -0.0 will be transformed
4175 if (!is_float(vtop
->type
.t
)) {
4186 unary_type(&type
); // Perform a in_sizeof = 0;
4187 size
= type_size(&type
, &align
);
4188 if (t
== TOK_SIZEOF
) {
4189 if (!(type
.t
& VT_VLA
)) {
4191 tcc_error("sizeof applied to an incomplete type");
4194 vla_runtime_type_size(&type
, &align
);
4199 vtop
->type
.t
|= VT_UNSIGNED
;
4202 case TOK_builtin_expect
:
4204 /* __builtin_expect is a no-op for now */
4205 int saved_nocode_wanted
;
4210 saved_nocode_wanted
= nocode_wanted
;
4214 nocode_wanted
= saved_nocode_wanted
;
4218 case TOK_builtin_types_compatible_p
:
4227 type1
.t
&= ~(VT_CONSTANT
| VT_VOLATILE
);
4228 type2
.t
&= ~(VT_CONSTANT
| VT_VOLATILE
);
4229 vpushi(is_compatible_types(&type1
, &type2
));
4232 case TOK_builtin_constant_p
:
4234 int saved_nocode_wanted
, res
;
4237 saved_nocode_wanted
= nocode_wanted
;
4240 res
= (vtop
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) == VT_CONST
;
4242 nocode_wanted
= saved_nocode_wanted
;
4247 case TOK_builtin_frame_address
:
4248 case TOK_builtin_return_address
:
4255 if (tok
!= TOK_CINT
) {
4256 tcc_error("%s only takes positive integers",
4257 tok1
== TOK_builtin_return_address
?
4258 "__builtin_return_address" :
4259 "__builtin_frame_address");
4261 level
= (uint32_t)tokc
.i
;
4266 vset(&type
, VT_LOCAL
, 0); /* local frame */
4268 mk_pointer(&vtop
->type
);
4269 indir(); /* -> parent frame */
4271 if (tok1
== TOK_builtin_return_address
) {
4272 // assume return address is just above frame pointer on stack
4275 mk_pointer(&vtop
->type
);
4280 #ifdef TCC_TARGET_X86_64
4281 #ifdef TCC_TARGET_PE
4282 case TOK_builtin_va_start
:
4290 if ((vtop
->r
& VT_VALMASK
) != VT_LOCAL
)
4291 tcc_error("__builtin_va_start expects a local variable");
4292 vtop
->r
&= ~(VT_LVAL
| VT_REF
);
4293 vtop
->type
= char_pointer_type
;
4299 case TOK_builtin_va_arg_types
:
4306 vpushi(classify_x86_64_va_arg(&type
));
4312 #ifdef TCC_TARGET_ARM64
4313 case TOK___va_start
: {
4315 tcc_error("statement in global scope");
4325 vtop
->type
.t
= VT_VOID
;
4328 case TOK___va_arg
: {
4331 tcc_error("statement in global scope");
4343 case TOK___arm64_clear_cache
: {
4352 vtop
->type
.t
= VT_VOID
;
4356 /* pre operations */
4367 t
= vtop
->type
.t
& VT_BTYPE
;
4369 /* In IEEE negate(x) isn't subtract(0,x), but rather
4374 else if (t
== VT_DOUBLE
)
4385 goto tok_identifier
;
4387 /* allow to take the address of a label */
4388 if (tok
< TOK_UIDENT
)
4389 expect("label identifier");
4390 s
= label_find(tok
);
4392 s
= label_push(&global_label_stack
, tok
, LABEL_FORWARD
);
4394 if (s
->r
== LABEL_DECLARED
)
4395 s
->r
= LABEL_FORWARD
;
4398 s
->type
.t
= VT_VOID
;
4399 mk_pointer(&s
->type
);
4400 s
->type
.t
|= VT_STATIC
;
4402 vpushsym(&s
->type
, s
);
4406 // special qnan , snan and infinity values
4408 vpush64(VT_DOUBLE
, 0x7ff8000000000000ULL
);
4412 vpush64(VT_DOUBLE
, 0x7ff0000000000001ULL
);
4416 vpush64(VT_DOUBLE
, 0x7ff0000000000000ULL
);
4425 expect("identifier");
4428 const char *name
= get_tok_str(t
, NULL
);
4430 tcc_error("'%s' undeclared", name
);
4431 /* for simple function calls, we tolerate undeclared
4432 external reference to int() function */
4433 if (tcc_state
->warn_implicit_function_declaration
4434 #ifdef TCC_TARGET_PE
4435 /* people must be warned about using undeclared WINAPI functions
4436 (which usually start with uppercase letter) */
4437 || (name
[0] >= 'A' && name
[0] <= 'Z')
4440 tcc_warning("implicit declaration of function '%s'", name
);
4441 s
= external_global_sym(t
, &func_old_type
, 0);
4443 if ((s
->type
.t
& (VT_STATIC
| VT_INLINE
| VT_BTYPE
)) ==
4444 (VT_STATIC
| VT_INLINE
| VT_FUNC
)) {
4445 /* if referencing an inline function, then we generate a
4446 symbol to it if not already done. It will have the
4447 effect to generate code for it at the end of the
4448 compilation unit. Inline function as always
4449 generated in the text section. */
4451 put_extern_sym(s
, text_section
, 0, 0);
4452 r
= VT_SYM
| VT_CONST
;
4456 vset(&s
->type
, r
, s
->c
);
4457 /* if forward reference, we must point to s */
4458 if (vtop
->r
& VT_SYM
) {
4465 /* post operations */
4467 if (tok
== TOK_INC
|| tok
== TOK_DEC
) {
4470 } else if (tok
== '.' || tok
== TOK_ARROW
|| tok
== TOK_CDOUBLE
) {
4473 if (tok
== TOK_ARROW
)
4475 qualifiers
= vtop
->type
.t
& (VT_CONSTANT
| VT_VOLATILE
);
4478 /* expect pointer on structure */
4479 if ((vtop
->type
.t
& VT_BTYPE
) != VT_STRUCT
)
4480 expect("struct or union");
4481 if (tok
== TOK_CDOUBLE
)
4482 expect("field name");
4484 if (tok
== TOK_CINT
|| tok
== TOK_CUINT
)
4485 expect("field name");
4489 while ((s
= s
->next
) != NULL
) {
4494 tcc_error("field not found: %s", get_tok_str(tok
& ~SYM_FIELD
, &tokc
));
4495 /* add field offset to pointer */
4496 vtop
->type
= char_pointer_type
; /* change type to 'char *' */
4499 /* change type to field type, and set to lvalue */
4500 vtop
->type
= s
->type
;
4501 vtop
->type
.t
|= qualifiers
;
4502 /* an array is never an lvalue */
4503 if (!(vtop
->type
.t
& VT_ARRAY
)) {
4504 vtop
->r
|= lvalue_type(vtop
->type
.t
);
4505 #ifdef CONFIG_TCC_BCHECK
4506 /* if bound checking, the referenced pointer must be checked */
4507 if (tcc_state
->do_bounds_check
&& (vtop
->r
& VT_VALMASK
) != VT_LOCAL
)
4508 vtop
->r
|= VT_MUSTBOUND
;
4512 } else if (tok
== '[') {
4518 } else if (tok
== '(') {
4521 int nb_args
, ret_nregs
, ret_align
, regsize
, variadic
;
4524 if ((vtop
->type
.t
& VT_BTYPE
) != VT_FUNC
) {
4525 /* pointer test (no array accepted) */
4526 if ((vtop
->type
.t
& (VT_BTYPE
| VT_ARRAY
)) == VT_PTR
) {
4527 vtop
->type
= *pointed_type(&vtop
->type
);
4528 if ((vtop
->type
.t
& VT_BTYPE
) != VT_FUNC
)
4532 expect("function pointer");
4535 vtop
->r
&= ~VT_LVAL
; /* no lvalue */
4537 /* get return type */
4540 sa
= s
->next
; /* first parameter */
4543 /* compute first implicit argument if a structure is returned */
4544 if ((s
->type
.t
& VT_BTYPE
) == VT_STRUCT
) {
4545 variadic
= (s
->c
== FUNC_ELLIPSIS
);
4546 ret_nregs
= gfunc_sret(&s
->type
, variadic
, &ret
.type
,
4547 &ret_align
, ®size
);
4549 /* get some space for the returned structure */
4550 size
= type_size(&s
->type
, &align
);
4551 #ifdef TCC_TARGET_ARM64
4552 /* On arm64, a small struct is return in registers.
4553 It is much easier to write it to memory if we know
4554 that we are allowed to write some extra bytes, so
4555 round the allocated space up to a power of 2: */
4557 while (size
& (size
- 1))
4558 size
= (size
| (size
- 1)) + 1;
4560 loc
= (loc
- size
) & -align
;
4562 ret
.r
= VT_LOCAL
| VT_LVAL
;
4563 /* pass it as 'int' to avoid structure arg passing
4565 vseti(VT_LOCAL
, loc
);
4575 /* return in register */
4576 if (is_float(ret
.type
.t
)) {
4577 ret
.r
= reg_fret(ret
.type
.t
);
4578 #ifdef TCC_TARGET_X86_64
4579 if ((ret
.type
.t
& VT_BTYPE
) == VT_QFLOAT
)
4583 #ifndef TCC_TARGET_ARM64
4584 #ifdef TCC_TARGET_X86_64
4585 if ((ret
.type
.t
& VT_BTYPE
) == VT_QLONG
)
4587 if ((ret
.type
.t
& VT_BTYPE
) == VT_LLONG
)
4598 gfunc_param_typed(s
, sa
);
4608 tcc_error("too few arguments to function");
4610 if (!nocode_wanted
) {
4611 gfunc_call(nb_args
);
4613 vtop
-= (nb_args
+ 1);
4617 for (r
= ret
.r
+ ret_nregs
+ !ret_nregs
; r
-- > ret
.r
;) {
4618 vsetc(&ret
.type
, r
, &ret
.c
);
4619 vtop
->r2
= ret
.r2
; /* Loop only happens when r2 is VT_CONST */
4622 /* handle packed struct return */
4623 if (((s
->type
.t
& VT_BTYPE
) == VT_STRUCT
) && ret_nregs
) {
4626 size
= type_size(&s
->type
, &align
);
4627 /* We're writing whole regs often, make sure there's enough
4628 space. Assume register size is power of 2. */
4629 if (regsize
> align
)
4631 loc
= (loc
- size
) & -align
;
4635 vset(&ret
.type
, VT_LOCAL
| VT_LVAL
, addr
+ offset
);
4639 if (--ret_nregs
== 0)
4643 vset(&s
->type
, VT_LOCAL
| VT_LVAL
, addr
);
4651 ST_FUNC
void expr_prod(void)
4656 while (tok
== '*' || tok
== '/' || tok
== '%') {
4664 ST_FUNC
void expr_sum(void)
4669 while (tok
== '+' || tok
== '-') {
4677 static void expr_shift(void)
4682 while (tok
== TOK_SHL
|| tok
== TOK_SAR
) {
4690 static void expr_cmp(void)
4695 while ((tok
>= TOK_ULE
&& tok
<= TOK_GT
) ||
4696 tok
== TOK_ULT
|| tok
== TOK_UGE
) {
4704 static void expr_cmpeq(void)
4709 while (tok
== TOK_EQ
|| tok
== TOK_NE
) {
4717 static void expr_and(void)
4720 while (tok
== '&') {
4727 static void expr_xor(void)
4730 while (tok
== '^') {
4737 static void expr_or(void)
4740 while (tok
== '|') {
4747 /* XXX: fix this mess */
4748 static void expr_land_const(void)
4751 while (tok
== TOK_LAND
) {
4757 static void expr_lor_const(void)
4760 while (tok
== TOK_LOR
) {
4767 static void expr_land(void)
4770 if (tok
== TOK_LAND
) {
4771 if ((vtop
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) == VT_CONST
) {
4782 int saved_nocode_wanted
= nocode_wanted
;
4786 nocode_wanted
= saved_nocode_wanted
;
4794 if (tok
!= TOK_LAND
) {
4805 static void expr_lor(void)
4808 if (tok
== TOK_LOR
) {
4809 if ((vtop
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) == VT_CONST
) {
4816 int saved_nocode_wanted
= nocode_wanted
;
4820 nocode_wanted
= saved_nocode_wanted
;
4832 if (tok
!= TOK_LOR
) {
4843 static void expr_cond(void)
4845 int tt
, u
, r1
, r2
, rc
, t1
, t2
, bt1
, bt2
, islv
;
4847 CType type
, type1
, type2
;
4852 if ((vtop
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) == VT_CONST
) {
4853 int saved_nocode_wanted
= nocode_wanted
;
4856 boolean
.t
= VT_BOOL
;
4862 if (tok
!= ':' || !gnu_ext
) {
4870 nocode_wanted
= saved_nocode_wanted
;
4873 if (tok
!= ':' || !gnu_ext
) {
4877 nocode_wanted
= saved_nocode_wanted
;
4884 if (vtop
!= vstack
) {
4885 /* needed to avoid having different registers saved in
4887 if (is_float(vtop
->type
.t
)) {
4889 #ifdef TCC_TARGET_X86_64
4890 if ((vtop
->type
.t
& VT_BTYPE
) == VT_LDOUBLE
) {
4900 if (tok
== ':' && gnu_ext
) {
4908 sv
= *vtop
; /* save value to handle it later */
4909 vtop
--; /* no vpop so that FP stack is not flushed */
4917 bt1
= t1
& VT_BTYPE
;
4919 bt2
= t2
& VT_BTYPE
;
4920 /* cast operands to correct type according to ISOC rules */
4921 if (is_float(bt1
) || is_float(bt2
)) {
4922 if (bt1
== VT_LDOUBLE
|| bt2
== VT_LDOUBLE
) {
4923 type
.t
= VT_LDOUBLE
;
4924 } else if (bt1
== VT_DOUBLE
|| bt2
== VT_DOUBLE
) {
4929 } else if (bt1
== VT_LLONG
|| bt2
== VT_LLONG
) {
4930 /* cast to biggest op */
4932 /* convert to unsigned if it does not fit in a long long */
4933 if ((t1
& (VT_BTYPE
| VT_UNSIGNED
)) == (VT_LLONG
| VT_UNSIGNED
) ||
4934 (t2
& (VT_BTYPE
| VT_UNSIGNED
)) == (VT_LLONG
| VT_UNSIGNED
))
4935 type
.t
|= VT_UNSIGNED
;
4936 } else if (bt1
== VT_PTR
|| bt2
== VT_PTR
) {
4937 /* If one is a null ptr constant the result type
4939 if (is_null_pointer (vtop
))
4941 else if (is_null_pointer (&sv
))
4943 /* XXX: test pointer compatibility, C99 has more elaborate
4947 } else if (bt1
== VT_FUNC
|| bt2
== VT_FUNC
) {
4948 /* XXX: test function pointer compatibility */
4949 type
= bt1
== VT_FUNC
? type1
: type2
;
4950 } else if (bt1
== VT_STRUCT
|| bt2
== VT_STRUCT
) {
4951 /* XXX: test structure compatibility */
4952 type
= bt1
== VT_STRUCT
? type1
: type2
;
4953 } else if (bt1
== VT_VOID
|| bt2
== VT_VOID
) {
4954 /* NOTE: as an extension, we accept void on only one side */
4957 /* integer operations */
4959 /* convert to unsigned if it does not fit in an integer */
4960 if ((t1
& (VT_BTYPE
| VT_UNSIGNED
)) == (VT_INT
| VT_UNSIGNED
) ||
4961 (t2
& (VT_BTYPE
| VT_UNSIGNED
)) == (VT_INT
| VT_UNSIGNED
))
4962 type
.t
|= VT_UNSIGNED
;
4964 /* keep structs lvalue by transforming `(expr ? a : b)` to `*(expr ? &a : &b)` so
4965 that `(expr ? a : b).mem` does not error with "lvalue expected" */
4966 islv
= (vtop
->r
& VT_LVAL
) && (sv
.r
& VT_LVAL
) && VT_STRUCT
== (type
.t
& VT_BTYPE
);
4968 /* now we convert second operand */
4971 mk_pointer(&vtop
->type
);
4974 else if (VT_STRUCT
== (vtop
->type
.t
& VT_BTYPE
))
4977 if (is_float(type
.t
)) {
4979 #ifdef TCC_TARGET_X86_64
4980 if ((type
.t
& VT_BTYPE
) == VT_LDOUBLE
) {
4984 } else if ((type
.t
& VT_BTYPE
) == VT_LLONG
) {
4985 /* for long longs, we use fixed registers to avoid having
4986 to handle a complicated move */
4991 /* this is horrible, but we must also convert first
4995 /* put again first value and cast it */
4999 mk_pointer(&vtop
->type
);
5002 else if (VT_STRUCT
== (vtop
->type
.t
& VT_BTYPE
))
5005 move_reg(r2
, r1
, type
.t
);
5014 static void expr_eq(void)
5020 (tok
>= TOK_A_MOD
&& tok
<= TOK_A_DIV
) ||
5021 tok
== TOK_A_XOR
|| tok
== TOK_A_OR
||
5022 tok
== TOK_A_SHL
|| tok
== TOK_A_SAR
) {
5037 ST_FUNC
void gexpr(void)
5048 /* parse an expression and return its type without any side effect. */
5049 static void expr_type(CType
*type
)
5051 int saved_nocode_wanted
;
5053 saved_nocode_wanted
= nocode_wanted
;
5058 nocode_wanted
= saved_nocode_wanted
;
5061 /* parse a unary expression and return its type without any side
5063 static void unary_type(CType
*type
)
5075 /* parse a constant expression and return value in vtop. */
5076 static void expr_const1(void)
5085 /* parse an integer constant and return its value. */
5086 ST_FUNC
int expr_const(void)
5090 if ((vtop
->r
& (VT_VALMASK
| VT_LVAL
| VT_SYM
)) != VT_CONST
)
5091 expect("constant expression");
5097 /* return the label token if current token is a label, otherwise
5099 static int is_label(void)
5103 /* fast test first */
5104 if (tok
< TOK_UIDENT
)
5106 /* no need to save tokc because tok is an identifier */
5113 unget_tok(last_tok
);
5118 static void label_or_decl(int l
)
5122 /* fast test first */
5123 if (tok
>= TOK_UIDENT
)
5125 /* no need to save tokc because tok is an identifier */
5129 unget_tok(last_tok
);
5132 unget_tok(last_tok
);
5137 static int case_cmp(const void *pa
, const void *pb
)
5139 int a
= (*(struct case_t
**) pa
)->v1
;
5140 int b
= (*(struct case_t
**) pb
)->v1
;
5141 return a
< b
? -1 : a
> b
;
5144 static int gcase(struct case_t
**base
, int len
, int case_reg
, int *bsym
)
5156 case_reg
= gv(RC_INT
);
5162 gtst_addr(0, p
->sym
); /* v1 <= x <= v2 */
5163 case_reg
= gv(RC_INT
);
5166 case_reg
= gcase(base
, len
/2, case_reg
, bsym
);
5167 if (cur_switch
->def_sym
)
5168 gjmp_addr(cur_switch
->def_sym
);
5170 *bsym
= gjmp(*bsym
);
5174 base
+= e
; len
-= e
;
5182 if (p
->v1
== p
->v2
) {
5184 gtst_addr(0, p
->sym
);
5188 case_reg
= gv(RC_INT
);
5194 gtst_addr(0, p
->sym
);
5197 case_reg
= gv(RC_INT
);
5203 static void block(int *bsym
, int *csym
, int is_expr
)
5208 /* generate line number info */
5209 if (tcc_state
->do_debug
&&
5210 (last_line_num
!= file
->line_num
|| last_ind
!= ind
)) {
5211 put_stabn(N_SLINE
, 0, file
->line_num
, ind
- func_ind
);
5213 last_line_num
= file
->line_num
;
5217 /* default return value is (void) */
5219 vtop
->type
.t
= VT_VOID
;
5222 if (tok
== TOK_IF
) {
5229 block(bsym
, csym
, 0);
5231 if (c
== TOK_ELSE
) {
5235 block(bsym
, csym
, 0);
5236 gsym(d
); /* patch else jmp */
5239 } else if (tok
== TOK_WHILE
) {
5255 } else if (tok
== '{') {
5257 int block_vla_sp_loc
= vla_sp_loc
, saved_vlas_in_scope
= vlas_in_scope
;
5260 /* record local declaration stack position */
5262 llabel
= local_label_stack
;
5265 /* handle local labels declarations */
5266 if (tok
== TOK_LABEL
) {
5269 if (tok
< TOK_UIDENT
)
5270 expect("label identifier");
5271 label_push(&local_label_stack
, tok
, LABEL_DECLARED
);
5281 while (tok
!= '}') {
5282 label_or_decl(VT_LOCAL
);
5286 block(bsym
, csym
, is_expr
);
5289 /* pop locally defined labels */
5290 label_pop(&local_label_stack
, llabel
);
5292 /* XXX: this solution makes only valgrind happy...
5293 triggered by gcc.c-torture/execute/20000917-1.c */
5295 switch(vtop
->type
.t
& VT_BTYPE
) {
5297 /* this breaks a compilation of the linux kernel v2.4.26 */
5298 /* pmd_t *new = ({ __asm__ __volatile__("ud2\n") ; ((pmd_t *)1); }); */
5299 /* Look a commit a80acab: Display error on statement expressions with complex return type */
5300 /* A pointer is not a complex return type */
5304 for(p
=vtop
->type
.ref
;p
;p
=p
->prev
)
5306 tcc_error("unsupported expression type");
5309 /* pop locally defined symbols */
5311 sym_pop(&local_stack
, s
);
5313 /* Pop VLA frames and restore stack pointer if required */
5314 if (vlas_in_scope
> saved_vlas_in_scope
) {
5315 vla_sp_loc
= saved_vlas_in_scope
? block_vla_sp_loc
: vla_sp_root_loc
;
5318 vlas_in_scope
= saved_vlas_in_scope
;
5321 } else if (tok
== TOK_RETURN
) {
5325 gen_assign_cast(&func_vt
);
5326 #ifdef TCC_TARGET_ARM64
5327 // Perhaps it would be better to use this for all backends:
5330 if ((func_vt
.t
& VT_BTYPE
) == VT_STRUCT
) {
5331 CType type
, ret_type
;
5332 int ret_align
, ret_nregs
, regsize
;
5333 ret_nregs
= gfunc_sret(&func_vt
, func_var
, &ret_type
,
5334 &ret_align
, ®size
);
5335 if (0 == ret_nregs
) {
5336 /* if returning structure, must copy it to implicit
5337 first pointer arg location */
5340 vset(&type
, VT_LOCAL
| VT_LVAL
, func_vc
);
5343 /* copy structure value to pointer */
5346 /* returning structure packed into registers */
5347 int r
, size
, addr
, align
;
5348 size
= type_size(&func_vt
,&align
);
5349 if ((vtop
->r
!= (VT_LOCAL
| VT_LVAL
) ||
5350 (vtop
->c
.i
& (ret_align
-1)))
5351 && (align
& (ret_align
-1))) {
5352 loc
= (loc
- size
) & -ret_align
;
5355 vset(&type
, VT_LOCAL
| VT_LVAL
, addr
);
5359 vset(&ret_type
, VT_LOCAL
| VT_LVAL
, addr
);
5361 vtop
->type
= ret_type
;
5362 if (is_float(ret_type
.t
))
5363 r
= rc_fret(ret_type
.t
);
5374 if (--ret_nregs
== 0)
5376 /* We assume that when a structure is returned in multiple
5377 registers, their classes are consecutive values of the
5380 vtop
->c
.i
+= regsize
;
5384 } else if (is_float(func_vt
.t
)) {
5385 gv(rc_fret(func_vt
.t
));
5390 vtop
--; /* NOT vpop() because on x86 it would flush the fp stack */
5393 /* jump unless last stmt in top-level block */
5394 if (tok
!= '}' || local_scope
!= 1)
5396 } else if (tok
== TOK_BREAK
) {
5399 tcc_error("cannot break");
5400 *bsym
= gjmp(*bsym
);
5403 } else if (tok
== TOK_CONTINUE
) {
5406 tcc_error("cannot continue");
5407 vla_sp_restore_root();
5408 *csym
= gjmp(*csym
);
5411 } else if (tok
== TOK_FOR
) {
5418 /* c99 for-loop init decl? */
5419 if (!decl0(VT_LOCAL
, 1)) {
5420 /* no, regular for-loop init expr */
5452 sym_pop(&local_stack
, s
);
5455 if (tok
== TOK_DO
) {
5472 if (tok
== TOK_SWITCH
) {
5473 struct switch_t
*saved
, sw
;
5477 /* XXX: other types than integer */
5482 b
= gjmp(0); /* jump to first case */
5483 sw
.p
= NULL
; sw
.n
= 0; sw
.def_sym
= 0;
5487 a
= gjmp(a
); /* add implicit break */
5490 qsort(sw
.p
, sw
.n
, sizeof(void*), case_cmp
);
5491 for (b
= 1; b
< sw
.n
; b
++)
5492 if (sw
.p
[b
- 1]->v2
>= sw
.p
[b
]->v1
)
5493 tcc_error("duplicate case value");
5494 gcase(sw
.p
, sw
.n
, c
, &a
);
5496 gjmp_addr(sw
.def_sym
);
5497 dynarray_reset(&sw
.p
, &sw
.n
);
5502 if (tok
== TOK_CASE
) {
5503 struct case_t
*cr
= tcc_malloc(sizeof(struct case_t
));
5507 cr
->v1
= cr
->v2
= expr_const();
5508 if (gnu_ext
&& tok
== TOK_DOTS
) {
5510 cr
->v2
= expr_const();
5511 if (cr
->v2
< cr
->v1
)
5512 tcc_warning("empty case range");
5515 dynarray_add((void***) &cur_switch
->p
, &cur_switch
->n
, cr
);
5518 goto block_after_label
;
5520 if (tok
== TOK_DEFAULT
) {
5525 if (cur_switch
->def_sym
)
5526 tcc_error("too many 'default'");
5527 cur_switch
->def_sym
= ind
;
5529 goto block_after_label
;
5531 if (tok
== TOK_GOTO
) {
5533 if (tok
== '*' && gnu_ext
) {
5537 if ((vtop
->type
.t
& VT_BTYPE
) != VT_PTR
)
5540 } else if (tok
>= TOK_UIDENT
) {
5541 s
= label_find(tok
);
5542 /* put forward definition if needed */
5544 s
= label_push(&global_label_stack
, tok
, LABEL_FORWARD
);
5546 if (s
->r
== LABEL_DECLARED
)
5547 s
->r
= LABEL_FORWARD
;
5549 vla_sp_restore_root();
5550 if (s
->r
& LABEL_FORWARD
)
5551 s
->jnext
= gjmp(s
->jnext
);
5553 gjmp_addr(s
->jnext
);
5556 expect("label identifier");
5559 } else if (tok
== TOK_ASM1
|| tok
== TOK_ASM2
|| tok
== TOK_ASM3
) {
5567 if (s
->r
== LABEL_DEFINED
)
5568 tcc_error("duplicate label '%s'", get_tok_str(s
->v
, NULL
));
5570 s
->r
= LABEL_DEFINED
;
5572 s
= label_push(&global_label_stack
, b
, LABEL_DEFINED
);
5576 /* we accept this, but it is a mistake */
5579 tcc_warning("deprecated use of label at end of compound statement");
5583 block(bsym
, csym
, is_expr
);
5586 /* expression case */
5601 /* t is the array or struct type. c is the array or struct
5602 address. cur_index/cur_field is the pointer to the current
5603 value. 'size_only' is true if only size info is needed (only used
5605 static void decl_designator(CType
*type
, Section
*sec
, unsigned long c
,
5606 int *cur_index
, Sym
**cur_field
,
5610 int notfirst
, index
, index_last
, align
, l
, nb_elems
, elem_size
;
5616 if (gnu_ext
&& (l
= is_label()) != 0)
5618 while (tok
== '[' || tok
== '.') {
5620 if (!(type
->t
& VT_ARRAY
))
5621 expect("array type");
5624 index
= expr_const();
5625 if (index
< 0 || (s
->c
>= 0 && index
>= s
->c
))
5626 expect("invalid index");
5627 if (tok
== TOK_DOTS
&& gnu_ext
) {
5629 index_last
= expr_const();
5630 if (index_last
< 0 ||
5631 (s
->c
>= 0 && index_last
>= s
->c
) ||
5633 expect("invalid index");
5639 *cur_index
= index_last
;
5640 type
= pointed_type(type
);
5641 elem_size
= type_size(type
, &align
);
5642 c
+= index
* elem_size
;
5643 /* NOTE: we only support ranges for last designator */
5644 nb_elems
= index_last
- index
+ 1;
5645 if (nb_elems
!= 1) {
5654 if ((type
->t
& VT_BTYPE
) != VT_STRUCT
)
5655 expect("struct/union type");
5668 /* XXX: fix this mess by using explicit storage field */
5670 type1
.t
|= (type
->t
& ~VT_TYPE
);
5684 if (type
->t
& VT_ARRAY
) {
5686 type
= pointed_type(type
);
5687 c
+= index
* type_size(type
, &align
);
5691 tcc_error("too many field init");
5692 /* XXX: fix this mess by using explicit storage field */
5694 type1
.t
|= (type
->t
& ~VT_TYPE
);
5699 decl_initializer(type
, sec
, c
, 0, size_only
);
5701 /* XXX: make it more general */
5702 if (!size_only
&& nb_elems
> 1) {
5703 unsigned long c_end
;
5708 tcc_error("range init not supported yet for dynamic storage");
5709 c_end
= c
+ nb_elems
* elem_size
;
5710 if (c_end
> sec
->data_allocated
)
5711 section_realloc(sec
, c_end
);
5712 src
= sec
->data
+ c
;
5714 for(i
= 1; i
< nb_elems
; i
++) {
5716 memcpy(dst
, src
, elem_size
);
5722 #define EXPR_CONST 1
5725 /* store a value or an expression directly in global data or in local array */
5726 static void init_putv(CType
*type
, Section
*sec
, unsigned long c
,
5727 int v
, int expr_type
)
5729 int saved_global_expr
, bt
, bit_pos
, bit_size
;
5731 unsigned long long bit_mask
;
5739 /* compound literals must be allocated globally in this case */
5740 saved_global_expr
= global_expr
;
5743 global_expr
= saved_global_expr
;
5744 /* NOTE: symbols are accepted */
5745 if ((vtop
->r
& (VT_VALMASK
| VT_LVAL
)) != VT_CONST
)
5746 tcc_error("initializer element is not constant");
5754 dtype
.t
&= ~VT_CONSTANT
; /* need to do that to avoid false warning */
5757 /* XXX: not portable */
5758 /* XXX: generate error if incorrect relocation */
5759 gen_assign_cast(&dtype
);
5760 bt
= type
->t
& VT_BTYPE
;
5761 /* we'll write at most 16 bytes */
5762 if (c
+ 16 > sec
->data_allocated
) {
5763 section_realloc(sec
, c
+ 16);
5765 ptr
= sec
->data
+ c
;
5766 /* XXX: make code faster ? */
5767 if (!(type
->t
& VT_BITFIELD
)) {
5772 bit_pos
= (vtop
->type
.t
>> VT_STRUCT_SHIFT
) & 0x3f;
5773 bit_size
= (vtop
->type
.t
>> (VT_STRUCT_SHIFT
+ 6)) & 0x3f;
5774 bit_mask
= (1LL << bit_size
) - 1;
5776 if ((vtop
->r
& VT_SYM
) &&
5782 (bt
== VT_INT
&& bit_size
!= 32)))
5783 tcc_error("initializer element is not computable at load time");
5785 /* XXX: when cross-compiling we assume that each type has the
5786 same representation on host and target, which is likely to
5787 be wrong in the case of long double */
5789 vtop
->c
.i
= (vtop
->c
.i
!= 0);
5791 *(char *)ptr
|= (vtop
->c
.i
& bit_mask
) << bit_pos
;
5794 *(short *)ptr
|= (vtop
->c
.i
& bit_mask
) << bit_pos
;
5797 *(double *)ptr
= vtop
->c
.d
;
5800 if (sizeof(long double) == LDOUBLE_SIZE
)
5801 *(long double *)ptr
= vtop
->c
.ld
;
5802 else if (sizeof(double) == LDOUBLE_SIZE
)
5803 *(double *)ptr
= vtop
->c
.ld
;
5805 tcc_error("can't cross compile long double constants");
5808 *(long long *)ptr
|= (vtop
->c
.i
& bit_mask
) << bit_pos
;
5811 addr_t val
= (vtop
->c
.i
& bit_mask
) << bit_pos
;
5812 #if defined(TCC_TARGET_ARM64) || defined(TCC_TARGET_X86_64)
5813 if (vtop
->r
& VT_SYM
)
5814 greloca(sec
, vtop
->sym
, c
, R_DATA_PTR
, val
);
5816 *(addr_t
*)ptr
|= val
;
5818 if (vtop
->r
& VT_SYM
)
5819 greloc(sec
, vtop
->sym
, c
, R_DATA_PTR
);
5820 *(addr_t
*)ptr
|= val
;
5825 int val
= (vtop
->c
.i
& bit_mask
) << bit_pos
;
5826 #if defined(TCC_TARGET_ARM64) || defined(TCC_TARGET_X86_64)
5827 if (vtop
->r
& VT_SYM
)
5828 greloca(sec
, vtop
->sym
, c
, R_DATA_PTR
, val
);
5832 if (vtop
->r
& VT_SYM
)
5833 greloc(sec
, vtop
->sym
, c
, R_DATA_PTR
);
5841 vset(&dtype
, VT_LOCAL
|VT_LVAL
, c
);
5848 /* put zeros for variable based init */
5849 static void init_putz(CType
*t
, Section
*sec
, unsigned long c
, int size
)
5852 /* nothing to do because globals are already set to zero */
5854 vpush_global_sym(&func_old_type
, TOK_memset
);
5856 #ifdef TCC_TARGET_ARM
5867 /* 't' contains the type and storage info. 'c' is the offset of the
5868 object in section 'sec'. If 'sec' is NULL, it means stack based
5869 allocation. 'first' is true if array '{' must be read (multi
5870 dimension implicit array init handling). 'size_only' is true if
5871 size only evaluation is wanted (only for arrays). */
5872 static void decl_initializer(CType
*type
, Section
*sec
, unsigned long c
,
5873 int first
, int size_only
)
5875 int index
, array_length
, n
, no_oblock
, nb
, parlevel
, parlevel1
, i
;
5876 int size1
, align1
, expr_type
;
5880 if (type
->t
& VT_VLA
) {
5883 /* save current stack pointer */
5884 if (vlas_in_scope
== 0) {
5885 if (vla_sp_root_loc
== -1)
5886 vla_sp_root_loc
= (loc
-= PTR_SIZE
);
5887 gen_vla_sp_save(vla_sp_root_loc
);
5890 vla_runtime_type_size(type
, &a
);
5891 gen_vla_alloc(type
, a
);
5895 } else if (type
->t
& VT_ARRAY
) {
5899 t1
= pointed_type(type
);
5900 size1
= type_size(t1
, &align1
);
5903 if ((first
&& tok
!= TOK_LSTR
&& tok
!= TOK_STR
) ||
5906 tcc_error("character array initializer must be a literal,"
5907 " optionally enclosed in braces");
5912 /* only parse strings here if correct type (otherwise: handle
5913 them as ((w)char *) expressions */
5914 if ((tok
== TOK_LSTR
&&
5915 #ifdef TCC_TARGET_PE
5916 (t1
->t
& VT_BTYPE
) == VT_SHORT
&& (t1
->t
& VT_UNSIGNED
)
5918 (t1
->t
& VT_BTYPE
) == VT_INT
5920 ) || (tok
== TOK_STR
&& (t1
->t
& VT_BTYPE
) == VT_BYTE
)) {
5921 while (tok
== TOK_STR
|| tok
== TOK_LSTR
) {
5924 /* compute maximum number of chars wanted */
5926 cstr_len
= tokc
.str
.size
;
5928 cstr_len
= tokc
.str
.size
/ sizeof(nwchar_t
);
5931 if (n
>= 0 && nb
> (n
- array_length
))
5932 nb
= n
- array_length
;
5935 tcc_warning("initializer-string for array is too long");
5936 /* in order to go faster for common case (char
5937 string in global variable, we handle it
5939 if (sec
&& tok
== TOK_STR
&& size1
== 1) {
5940 memcpy(sec
->data
+ c
+ array_length
, tokc
.str
.data
, nb
);
5944 ch
= ((unsigned char *)tokc
.str
.data
)[i
];
5946 ch
= ((nwchar_t
*)tokc
.str
.data
)[i
];
5947 init_putv(t1
, sec
, c
+ (array_length
+ i
) * size1
,
5955 /* only add trailing zero if enough storage (no
5956 warning in this case since it is standard) */
5957 if (n
< 0 || array_length
< n
) {
5959 init_putv(t1
, sec
, c
+ (array_length
* size1
), 0, EXPR_VAL
);
5965 while (tok
!= '}') {
5966 decl_designator(type
, sec
, c
, &index
, NULL
, size_only
);
5967 if (n
>= 0 && index
>= n
)
5968 tcc_error("index too large");
5969 /* must put zero in holes (note that doing it that way
5970 ensures that it even works with designators) */
5971 if (!size_only
&& array_length
< index
) {
5972 init_putz(t1
, sec
, c
+ array_length
* size1
,
5973 (index
- array_length
) * size1
);
5976 if (index
> array_length
)
5977 array_length
= index
;
5978 /* special test for multi dimensional arrays (may not
5979 be strictly correct if designators are used at the
5981 if (index
>= n
&& no_oblock
)
5990 /* put zeros at the end */
5991 if (!size_only
&& n
>= 0 && array_length
< n
) {
5992 init_putz(t1
, sec
, c
+ array_length
* size1
,
5993 (n
- array_length
) * size1
);
5995 /* patch type size if needed */
5997 s
->c
= array_length
;
5998 } else if ((type
->t
& VT_BTYPE
) == VT_STRUCT
&&
5999 (sec
|| !first
|| tok
== '{')) {
6001 /* NOTE: the previous test is a specific case for automatic
6002 struct/union init */
6003 /* XXX: union needs only one init */
6010 if (tcc_state
->old_struct_init_code
) {
6011 /* an old version of struct initialization.
6012 It have a problems. But with a new version
6013 linux 2.4.26 can't load ramdisk.
6015 while (tok
== '(') {
6019 if (!parse_btype(&type1
, &ad1
))
6021 type_decl(&type1
, &ad1
, &n
, TYPE_ABSTRACT
);
6023 if (!is_assignable_types(type
, &type1
))
6024 tcc_error("invalid type for cast");
6031 if (!parse_btype(&type1
, &ad1
))
6033 type_decl(&type1
, &ad1
, &n
, TYPE_ABSTRACT
);
6035 if (!is_assignable_types(type
, &type1
))
6036 tcc_error("invalid type for cast");
6045 if (first
|| tok
== '{') {
6054 while (tok
!= '}') {
6055 decl_designator(type
, sec
, c
, NULL
, &f
, size_only
);
6057 if (!size_only
&& array_length
< index
) {
6058 init_putz(type
, sec
, c
+ array_length
,
6059 index
- array_length
);
6061 index
= index
+ type_size(&f
->type
, &align1
);
6062 if (index
> array_length
)
6063 array_length
= index
;
6065 /* gr: skip fields from same union - ugly. */
6068 int f_size
= type_size(&f
->type
, &align
);
6069 int f_type
= (f
->type
.t
& VT_BTYPE
);
6071 ///printf("index: %2d %08x -- %2d %08x\n", f->c, f->type.t, f->next->c, f->next->type.t);
6072 /* test for same offset */
6073 if (f
->next
->c
!= f
->c
)
6075 if ((f_type
== VT_STRUCT
) && (f_size
== 0)) {
6077 Lets assume a structure of size 0 can't be a member of the union.
6078 This allow to compile the following code from a linux kernel v2.4.26
6079 typedef struct { } rwlock_t;
6085 struct fs_struct init_fs = { { (1) }, (rwlock_t) {}, 0022, };
6086 tcc-0.9.23 can succesfully compile this version of the kernel.
6087 gcc don't have problems with this code too.
6091 /* if yes, test for bitfield shift */
6092 if ((f
->type
.t
& VT_BITFIELD
) && (f
->next
->type
.t
& VT_BITFIELD
)) {
6093 int bit_pos_1
= (f
->type
.t
>> VT_STRUCT_SHIFT
) & 0x3f;
6094 int bit_pos_2
= (f
->next
->type
.t
>> VT_STRUCT_SHIFT
) & 0x3f;
6095 //printf("bitfield %d %d\n", bit_pos_1, bit_pos_2);
6096 if (bit_pos_1
!= bit_pos_2
)
6103 if (no_oblock
&& f
== NULL
)
6109 /* put zeros at the end */
6110 if (!size_only
&& array_length
< n
) {
6111 init_putz(type
, sec
, c
+ array_length
,
6120 } else if (tok
== '{') {
6122 decl_initializer(type
, sec
, c
, first
, size_only
);
6124 } else if (size_only
) {
6125 /* just skip expression */
6126 parlevel
= parlevel1
= 0;
6127 while ((parlevel
> 0 || parlevel1
> 0 ||
6128 (tok
!= '}' && tok
!= ',')) && tok
!= -1) {
6131 else if (tok
== ')') {
6132 if (parlevel
== 0 && parlevel1
== 0)
6136 else if (tok
== '{')
6138 else if (tok
== '}') {
6139 if (parlevel
== 0 && parlevel1
== 0)
6146 /* currently, we always use constant expression for globals
6147 (may change for scripting case) */
6148 expr_type
= EXPR_CONST
;
6150 expr_type
= EXPR_ANY
;
6151 init_putv(type
, sec
, c
, 0, expr_type
);
6155 /* parse an initializer for type 't' if 'has_init' is non zero, and
6156 allocate space in local or global data space ('r' is either
6157 VT_LOCAL or VT_CONST). If 'v' is non zero, then an associated
6158 variable 'v' of scope 'scope' is declared before initializers
6159 are parsed. If 'v' is zero, then a reference to the new object
6160 is put in the value stack. If 'has_init' is 2, a special parsing
6161 is done to handle string constants. */
6162 static void decl_initializer_alloc(CType
*type
, AttributeDef
*ad
, int r
,
6163 int has_init
, int v
, int scope
)
6165 int size
, align
, addr
, data_offset
;
6167 ParseState saved_parse_state
= {0};
6168 TokenString
*init_str
= NULL
;
6170 Sym
*flexible_array
;
6172 flexible_array
= NULL
;
6173 if ((type
->t
& VT_BTYPE
) == VT_STRUCT
) {
6174 Sym
*field
= type
->ref
->next
;
6177 field
= field
->next
;
6178 if (field
->type
.t
& VT_ARRAY
&& field
->type
.ref
->c
< 0)
6179 flexible_array
= field
;
6183 size
= type_size(type
, &align
);
6184 /* If unknown size, we must evaluate it before
6185 evaluating initializers because
6186 initializers can generate global data too
6187 (e.g. string pointers or ISOC99 compound
6188 literals). It also simplifies local
6189 initializers handling */
6190 if (size
< 0 || (flexible_array
&& has_init
)) {
6192 tcc_error("unknown type size");
6193 /* get all init string */
6194 init_str
= tok_str_alloc();
6195 if (has_init
== 2) {
6196 /* only get strings */
6197 while (tok
== TOK_STR
|| tok
== TOK_LSTR
) {
6198 tok_str_add_tok(init_str
);
6203 while (level
> 0 || (tok
!= ',' && tok
!= ';')) {
6205 tcc_error("unexpected end of file in initializer");
6206 tok_str_add_tok(init_str
);
6209 else if (tok
== '}') {
6219 tok_str_add(init_str
, -1);
6220 tok_str_add(init_str
, 0);
6223 save_parse_state(&saved_parse_state
);
6225 begin_macro(init_str
, 1);
6227 decl_initializer(type
, NULL
, 0, 1, 1);
6228 /* prepare second initializer parsing */
6229 macro_ptr
= init_str
->str
;
6232 /* if still unknown size, error */
6233 size
= type_size(type
, &align
);
6235 tcc_error("unknown type size");
6237 /* If there's a flex member and it was used in the initializer
6239 if (flexible_array
&&
6240 flexible_array
->type
.ref
->c
> 0)
6241 size
+= flexible_array
->type
.ref
->c
6242 * pointed_size(&flexible_array
->type
);
6243 /* take into account specified alignment if bigger */
6244 if (ad
->a
.aligned
) {
6245 if (ad
->a
.aligned
> align
)
6246 align
= ad
->a
.aligned
;
6247 } else if (ad
->a
.packed
) {
6250 if ((r
& VT_VALMASK
) == VT_LOCAL
) {
6252 #ifdef CONFIG_TCC_BCHECK
6253 if (tcc_state
->do_bounds_check
&& (type
->t
& VT_ARRAY
)) {
6257 loc
= (loc
- size
) & -align
;
6259 #ifdef CONFIG_TCC_BCHECK
6260 /* handles bounds */
6261 /* XXX: currently, since we do only one pass, we cannot track
6262 '&' operators, so we add only arrays */
6263 if (tcc_state
->do_bounds_check
&& (type
->t
& VT_ARRAY
)) {
6265 /* add padding between regions */
6267 /* then add local bound info */
6268 bounds_ptr
= section_ptr_add(lbounds_section
, 2 * sizeof(addr_t
));
6269 bounds_ptr
[0] = addr
;
6270 bounds_ptr
[1] = size
;
6274 /* local variable */
6275 sym_push(v
, type
, r
, addr
);
6277 /* push local reference */
6278 vset(type
, r
, addr
);
6284 if (v
&& scope
== VT_CONST
) {
6285 /* see if the symbol was already defined */
6288 if (!is_compatible_types(&sym
->type
, type
))
6289 tcc_error("incompatible types for redefinition of '%s'",
6290 get_tok_str(v
, NULL
));
6291 if (sym
->type
.t
& VT_EXTERN
) {
6292 /* if the variable is extern, it was not allocated */
6293 sym
->type
.t
&= ~VT_EXTERN
;
6294 /* set array size if it was omitted in extern
6296 if ((sym
->type
.t
& VT_ARRAY
) &&
6297 sym
->type
.ref
->c
< 0 &&
6299 sym
->type
.ref
->c
= type
->ref
->c
;
6301 /* we accept several definitions of the same
6302 global variable. this is tricky, because we
6303 must play with the SHN_COMMON type of the symbol */
6304 /* XXX: should check if the variable was already
6305 initialized. It is incorrect to initialized it
6307 /* no init data, we won't add more to the symbol */
6314 /* allocate symbol in corresponding section */
6319 else if (tcc_state
->nocommon
)
6323 data_offset
= sec
->data_offset
;
6324 data_offset
= (data_offset
+ align
- 1) & -align
;
6326 /* very important to increment global pointer at this time
6327 because initializers themselves can create new initializers */
6328 data_offset
+= size
;
6329 #ifdef CONFIG_TCC_BCHECK
6330 /* add padding if bound check */
6331 if (tcc_state
->do_bounds_check
)
6334 sec
->data_offset
= data_offset
;
6335 /* allocate section space to put the data */
6336 if (sec
->sh_type
!= SHT_NOBITS
&&
6337 data_offset
> sec
->data_allocated
)
6338 section_realloc(sec
, data_offset
);
6339 /* align section if needed */
6340 if (align
> sec
->sh_addralign
)
6341 sec
->sh_addralign
= align
;
6343 addr
= 0; /* avoid warning */
6347 if (scope
!= VT_CONST
|| !sym
) {
6348 sym
= sym_push(v
, type
, r
| VT_SYM
, 0);
6349 sym
->asm_label
= ad
->asm_label
;
6351 /* update symbol definition */
6353 put_extern_sym(sym
, sec
, addr
, size
);
6356 /* put a common area */
6357 put_extern_sym(sym
, NULL
, align
, size
);
6358 /* XXX: find a nicer way */
6359 esym
= &((ElfW(Sym
) *)symtab_section
->data
)[sym
->c
];
6360 esym
->st_shndx
= SHN_COMMON
;
6363 /* push global reference */
6364 sym
= get_sym_ref(type
, sec
, addr
, size
);
6365 vpushsym(type
, sym
);
6367 /* patch symbol weakness */
6368 if (type
->t
& VT_WEAK
)
6370 apply_visibility(sym
, type
);
6371 #ifdef CONFIG_TCC_BCHECK
6372 /* handles bounds now because the symbol must be defined
6373 before for the relocation */
6374 if (tcc_state
->do_bounds_check
) {
6377 greloc(bounds_section
, sym
, bounds_section
->data_offset
, R_DATA_PTR
);
6378 /* then add global bound info */
6379 bounds_ptr
= section_ptr_add(bounds_section
, 2 * sizeof(addr_t
));
6380 bounds_ptr
[0] = 0; /* relocated */
6381 bounds_ptr
[1] = size
;
6385 if (has_init
|| (type
->t
& VT_VLA
)) {
6386 decl_initializer(type
, sec
, addr
, 1, 0);
6387 /* patch flexible array member size back to -1, */
6388 /* for possible subsequent similar declarations */
6390 flexible_array
->type
.ref
->c
= -1;
6393 /* restore parse state if needed */
6396 restore_parse_state(&saved_parse_state
);
6400 static void put_func_debug(Sym
*sym
)
6405 /* XXX: we put here a dummy type */
6406 snprintf(buf
, sizeof(buf
), "%s:%c1",
6407 funcname
, sym
->type
.t
& VT_STATIC
? 'f' : 'F');
6408 put_stabs_r(buf
, N_FUN
, 0, file
->line_num
, 0,
6409 cur_text_section
, sym
->c
);
6410 /* //gr gdb wants a line at the function */
6411 put_stabn(N_SLINE
, 0, file
->line_num
, 0);
6416 /* parse an old style function declaration list */
6417 /* XXX: check multiple parameter */
6418 static void func_decl_list(Sym
*func_sym
)
6425 /* parse each declaration */
6426 while (tok
!= '{' && tok
!= ';' && tok
!= ',' && tok
!= TOK_EOF
&&
6427 tok
!= TOK_ASM1
&& tok
!= TOK_ASM2
&& tok
!= TOK_ASM3
) {
6428 if (!parse_btype(&btype
, &ad
))
6429 expect("declaration list");
6430 if (((btype
.t
& VT_BTYPE
) == VT_ENUM
||
6431 (btype
.t
& VT_BTYPE
) == VT_STRUCT
) &&
6433 /* we accept no variable after */
6437 type_decl(&type
, &ad
, &v
, TYPE_DIRECT
);
6438 /* find parameter in function parameter list */
6441 if ((s
->v
& ~SYM_FIELD
) == v
)
6445 tcc_error("declaration for parameter '%s' but no such parameter",
6446 get_tok_str(v
, NULL
));
6448 /* check that no storage specifier except 'register' was given */
6449 if (type
.t
& VT_STORAGE
)
6450 tcc_error("storage class specified for '%s'", get_tok_str(v
, NULL
));
6451 convert_parameter_type(&type
);
6452 /* we can add the type (NOTE: it could be local to the function) */
6454 /* accept other parameters */
6465 /* parse a function defined by symbol 'sym' and generate its code in
6466 'cur_text_section' */
6467 static void gen_function(Sym
*sym
)
6469 int saved_nocode_wanted
= nocode_wanted
;
6472 ind
= cur_text_section
->data_offset
;
6473 /* NOTE: we patch the symbol size later */
6474 put_extern_sym(sym
, cur_text_section
, ind
, 0);
6475 funcname
= get_tok_str(sym
->v
, NULL
);
6477 /* Initialize VLA state */
6479 vla_sp_root_loc
= -1;
6480 /* put debug symbol */
6481 if (tcc_state
->do_debug
)
6482 put_func_debug(sym
);
6484 /* push a dummy symbol to enable local sym storage */
6485 sym_push2(&local_stack
, SYM_FIELD
, 0, 0);
6486 local_scope
= 1; /* for function parameters */
6487 gfunc_prolog(&sym
->type
);
6491 block(NULL
, NULL
, 0);
6494 cur_text_section
->data_offset
= ind
;
6495 label_pop(&global_label_stack
, NULL
);
6496 /* reset local stack */
6498 sym_pop(&local_stack
, NULL
);
6499 /* end of function */
6500 /* patch symbol size */
6501 ((ElfW(Sym
) *)symtab_section
->data
)[sym
->c
].st_size
=
6503 /* patch symbol weakness (this definition overrules any prototype) */
6504 if (sym
->type
.t
& VT_WEAK
)
6506 apply_visibility(sym
, &sym
->type
);
6507 if (tcc_state
->do_debug
) {
6508 put_stabn(N_FUN
, 0, 0, ind
- func_ind
);
6510 /* It's better to crash than to generate wrong code */
6511 cur_text_section
= NULL
;
6512 funcname
= ""; /* for safety */
6513 func_vt
.t
= VT_VOID
; /* for safety */
6514 func_var
= 0; /* for safety */
6515 ind
= 0; /* for safety */
6516 nocode_wanted
= saved_nocode_wanted
;
6520 static void gen_inline_functions(TCCState
*s
)
6523 int inline_generated
, i
, ln
;
6524 struct InlineFunc
*fn
;
6526 ln
= file
->line_num
;
6527 /* iterate while inline function are referenced */
6529 inline_generated
= 0;
6530 for (i
= 0; i
< s
->nb_inline_fns
; ++i
) {
6531 fn
= s
->inline_fns
[i
];
6533 if (sym
&& sym
->c
) {
6534 /* the function was used: generate its code and
6535 convert it to a normal function */
6538 pstrcpy(file
->filename
, sizeof file
->filename
, fn
->filename
);
6539 sym
->r
= VT_SYM
| VT_CONST
;
6540 sym
->type
.t
&= ~VT_INLINE
;
6542 begin_macro(fn
->func_str
, 1);
6544 cur_text_section
= text_section
;
6548 inline_generated
= 1;
6551 if (!inline_generated
)
6554 file
->line_num
= ln
;
6557 ST_FUNC
void free_inline_functions(TCCState
*s
)
6560 /* free tokens of unused inline functions */
6561 for (i
= 0; i
< s
->nb_inline_fns
; ++i
) {
6562 struct InlineFunc
*fn
= s
->inline_fns
[i
];
6564 tok_str_free(fn
->func_str
);
6566 dynarray_reset(&s
->inline_fns
, &s
->nb_inline_fns
);
6569 /* 'l' is VT_LOCAL or VT_CONST to define default storage type */
6570 static int decl0(int l
, int is_for_loop_init
)
6578 if (!parse_btype(&btype
, &ad
)) {
6579 if (is_for_loop_init
)
6581 /* skip redundant ';' */
6582 /* XXX: find more elegant solution */
6587 if (l
== VT_CONST
&&
6588 (tok
== TOK_ASM1
|| tok
== TOK_ASM2
|| tok
== TOK_ASM3
)) {
6589 /* global asm block */
6593 /* special test for old K&R protos without explicit int
6594 type. Only accepted when defining global data */
6595 if (l
== VT_LOCAL
|| tok
< TOK_UIDENT
)
6599 if (((btype
.t
& VT_BTYPE
) == VT_ENUM
||
6600 (btype
.t
& VT_BTYPE
) == VT_STRUCT
) &&
6602 if ((btype
.t
& VT_BTYPE
) == VT_STRUCT
) {
6603 int v
= btype
.ref
->v
;
6604 if (!(v
& SYM_FIELD
) && (v
& ~SYM_STRUCT
) >= SYM_FIRST_ANOM
)
6605 tcc_warning("unnamed struct/union that defines no instances");
6610 while (1) { /* iterate thru each declaration */
6612 type_decl(&type
, &ad
, &v
, TYPE_DIRECT
);
6616 type_to_str(buf
, sizeof(buf
), t
, get_tok_str(v
, NULL
));
6617 printf("type = '%s'\n", buf
);
6620 if ((type
.t
& VT_BTYPE
) == VT_FUNC
) {
6621 if ((type
.t
& VT_STATIC
) && (l
== VT_LOCAL
)) {
6622 tcc_error("function without file scope cannot be static");
6624 /* if old style function prototype, we accept a
6627 if (sym
->c
== FUNC_OLD
)
6628 func_decl_list(sym
);
6631 if (gnu_ext
&& (tok
== TOK_ASM1
|| tok
== TOK_ASM2
|| tok
== TOK_ASM3
)) {
6632 ad
.asm_label
= asm_label_instr();
6633 /* parse one last attribute list, after asm label */
6634 parse_attribute(&ad
);
6641 #ifdef TCC_TARGET_PE
6642 if (ad
.a
.func_import
)
6643 type
.t
|= VT_IMPORT
;
6644 if (ad
.a
.func_export
)
6645 type
.t
|= VT_EXPORT
;
6647 type
.t
|= ad
.a
.visibility
<< VT_VIS_SHIFT
;
6651 tcc_error("cannot use local functions");
6652 if ((type
.t
& VT_BTYPE
) != VT_FUNC
)
6653 expect("function definition");
6655 /* reject abstract declarators in function definition */
6657 while ((sym
= sym
->next
) != NULL
)
6658 if (!(sym
->v
& ~SYM_FIELD
))
6659 expect("identifier");
6661 /* XXX: cannot do better now: convert extern line to static inline */
6662 if ((type
.t
& (VT_EXTERN
| VT_INLINE
)) == (VT_EXTERN
| VT_INLINE
))
6663 type
.t
= (type
.t
& ~VT_EXTERN
) | VT_STATIC
;
6668 if ((sym
->type
.t
& VT_BTYPE
) != VT_FUNC
)
6671 ref
= sym
->type
.ref
;
6672 if (0 == ref
->a
.func_proto
)
6673 tcc_error("redefinition of '%s'", get_tok_str(v
, NULL
));
6675 /* use func_call from prototype if not defined */
6676 if (ref
->a
.func_call
!= FUNC_CDECL
6677 && type
.ref
->a
.func_call
== FUNC_CDECL
)
6678 type
.ref
->a
.func_call
= ref
->a
.func_call
;
6680 /* use export from prototype */
6681 if (ref
->a
.func_export
)
6682 type
.ref
->a
.func_export
= 1;
6684 /* use static from prototype */
6685 if (sym
->type
.t
& VT_STATIC
)
6686 type
.t
= (type
.t
& ~VT_EXTERN
) | VT_STATIC
;
6688 /* If the definition has no visibility use the
6689 one from prototype. */
6690 if (! (type
.t
& VT_VIS_MASK
))
6691 type
.t
|= sym
->type
.t
& VT_VIS_MASK
;
6693 if (!is_compatible_types(&sym
->type
, &type
)) {
6695 tcc_error("incompatible types for redefinition of '%s'",
6696 get_tok_str(v
, NULL
));
6698 type
.ref
->a
.func_proto
= 0;
6699 /* if symbol is already defined, then put complete type */
6702 /* put function symbol */
6703 sym
= global_identifier_push(v
, type
.t
, 0);
6704 sym
->type
.ref
= type
.ref
;
6707 /* static inline functions are just recorded as a kind
6708 of macro. Their code will be emitted at the end of
6709 the compilation unit only if they are used */
6710 if ((type
.t
& (VT_INLINE
| VT_STATIC
)) ==
6711 (VT_INLINE
| VT_STATIC
)) {
6713 struct InlineFunc
*fn
;
6714 const char *filename
;
6716 filename
= file
? file
->filename
: "";
6717 fn
= tcc_malloc(sizeof *fn
+ strlen(filename
));
6718 strcpy(fn
->filename
, filename
);
6720 fn
->func_str
= tok_str_alloc();
6726 tcc_error("unexpected end of file");
6727 tok_str_add_tok(fn
->func_str
);
6732 } else if (t
== '}') {
6734 if (block_level
== 0)
6738 tok_str_add(fn
->func_str
, -1);
6739 tok_str_add(fn
->func_str
, 0);
6740 dynarray_add((void ***)&tcc_state
->inline_fns
, &tcc_state
->nb_inline_fns
, fn
);
6743 /* compute text section */
6744 cur_text_section
= ad
.section
;
6745 if (!cur_text_section
)
6746 cur_text_section
= text_section
;
6747 sym
->r
= VT_SYM
| VT_CONST
;
6752 if (btype
.t
& VT_TYPEDEF
) {
6753 /* save typedefed type */
6754 /* XXX: test storage specifiers ? */
6756 if (sym
&& sym
->scope
== local_scope
) {
6757 if (!is_compatible_types(&sym
->type
, &type
)
6758 || !(sym
->type
.t
& VT_TYPEDEF
))
6759 tcc_error("incompatible redefinition of '%s'",
6760 get_tok_str(v
, NULL
));
6763 sym
= sym_push(v
, &type
, 0, 0);
6766 sym
->type
.t
|= VT_TYPEDEF
;
6769 if ((type
.t
& VT_BTYPE
) == VT_FUNC
) {
6770 /* external function definition */
6771 /* specific case for func_call attribute */
6772 ad
.a
.func_proto
= 1;
6774 } else if (!(type
.t
& VT_ARRAY
)) {
6775 /* not lvalue if array */
6776 r
|= lvalue_type(type
.t
);
6778 has_init
= (tok
== '=');
6779 if (has_init
&& (type
.t
& VT_VLA
))
6780 tcc_error("Variable length array cannot be initialized");
6781 if ((btype
.t
& VT_EXTERN
) || ((type
.t
& VT_BTYPE
) == VT_FUNC
) ||
6782 ((type
.t
& VT_ARRAY
) && (type
.t
& VT_STATIC
) &&
6783 !has_init
&& l
== VT_CONST
&& type
.ref
->c
< 0)) {
6784 /* external variable or function */
6785 /* NOTE: as GCC, uninitialized global static
6786 arrays of null size are considered as
6788 sym
= external_sym(v
, &type
, r
);
6789 sym
->asm_label
= ad
.asm_label
;
6791 if (ad
.alias_target
) {
6796 alias_target
= sym_find(ad
.alias_target
);
6797 if (!alias_target
|| !alias_target
->c
)
6798 tcc_error("unsupported forward __alias__ attribute");
6799 esym
= &((Elf32_Sym
*)symtab_section
->data
)[alias_target
->c
];
6800 tsec
.sh_num
= esym
->st_shndx
;
6801 put_extern_sym2(sym
, &tsec
, esym
->st_value
, esym
->st_size
, 0);
6804 type
.t
|= (btype
.t
& VT_STATIC
); /* Retain "static". */
6805 if (type
.t
& VT_STATIC
)
6811 decl_initializer_alloc(&type
, &ad
, r
, has_init
, v
, l
);
6815 if (is_for_loop_init
)
6828 ST_FUNC
void decl(int l
)
6833 /* ------------------------------------------------------------------------- */