llvm/test/MC/COFF/cv-inline-linetable-unlikely.s

   1 # RUN: llvm-mc -triple=x86_64-windows -filetype=obj < %s -o %t.obj
   2 # RUN: llvm-objdump --no-print-imm-hex -d %t.obj | FileCheck %s --check-prefix=ASM
   3 # RUN: llvm-pdbutil dump -symbols %t.obj | FileCheck %s --check-prefix=CODEVIEW
   4
   5 # C source to generate the assembly:
   6 # volatile int unlikely_cond = 0;
   7 # extern void __declspec(noreturn) abort();
   8 # __forceinline void f() {
   9 #   if (unlikely_cond)
  10 #     abort();
  11 # }
  12 # void g() {
  13 #   unlikely_cond = 0;
  14 #   f();
  15 #   unlikely_cond = 0;
  16 # }
  17
  18 # This test is interesting because the inlined instructions are discontiguous.
  19 # LLVM's block layout algorithms will put the 'abort' call last, as it is
  20 # considered highly unlikely to execute. This is similar to what it does for
  21 # calls to __asan_report*, for which it is very important to have an accurate
  22 # stack trace.
  23
  24 # ASM:      0000000000000000 <g>:
  25 # ASM-NEXT:        0: 48 83 ec 28                   subq    $40, %rsp
  26 # ASM-NEXT:        4: c7 05 fc ff ff ff 00 00 00 00 movl    $0, -4(%rip)
  27 #  Begin inline loc (matches cv_loc below)
  28 # ASM-NEXT:        e: 83 3d ff ff ff ff 00          cmpl    $0, -1(%rip)
  29 # ASM-NEXT:       15: 75 0f                         jne     0x26 <g+0x26>
  30 #  End inline loc
  31 # ASM-NEXT:       17: c7 05 fc ff ff ff 00 00 00 00 movl    $0, -4(%rip)
  32 # ASM-NEXT:       21: 48 83 c4 28                   addq    $40, %rsp
  33 # ASM-NEXT:       25: c3                            retq
  34 #  Begin inline loc (matches cv_loc below)
  35 # ASM-NEXT:       26: e8 00 00 00 00                callq   0x2b <g+0x2b>
  36 # ASM-NEXT:       2b: 0f 0b                         ud2
  37 #  End inline loc
  38
  39 # CODEVIEW:      S_INLINESITE [size = 24]
  40 # CODEVIEW-NEXT: inlinee = 0x1002 (f), parent = 0, end = 0
  41 # CODEVIEW-NEXT:   0B2E      code 0xE (+0xE) line 1 (+1)
  42 # CODEVIEW-NEXT:   0409      code end 0x17 (+0x9)
  43 # CODEVIEW-NEXT:   0B2F      code 0x26 (+0xF) line 2 (+1)
  44 # CODEVIEW-NEXT:   0407      code end 0x2D (+0x7)
  45
  46         .text
  47         .globl  g
  48 g:                                      # @g
  49 .Lfunc_begin0:
  50         .cv_func_id 0
  51         .cv_file        1 "C:\\src\\llvm\\build\\t.cpp"
  52         .cv_loc 0 1 7 0 is_stmt 0       # t.cpp:7:0
  53 .seh_proc g
  54         subq    $40, %rsp
  55         .seh_stackalloc 40
  56         .seh_endprologue
  57         .cv_loc 0 1 8 17                # t.cpp:8:17
  58         movl    $0, unlikely_cond(%rip)
  59         .cv_inline_site_id 1 within 0 inlined_at 1 9 3
  60         .cv_loc 1 1 4 7                 # t.cpp:4:7
  61         cmpl    $0, unlikely_cond(%rip)
  62         jne     .LBB0_1
  63         .cv_loc 0 1 10 17               # t.cpp:10:17
  64         movl    $0, unlikely_cond(%rip)
  65         .cv_loc 0 1 11 1                # t.cpp:11:1
  66         addq    $40, %rsp
  67         retq
  68
  69 .LBB0_1:                                # %if.then.i
  70         .cv_loc 1 1 5 5                 # t.cpp:5:5
  71         callq   abort
  72         ud2
  73 .Lfunc_end0:
  74         .seh_handlerdata
  75         .text
  76         .seh_endproc
  77
  78         .bss
  79         .globl  unlikely_cond           # @unlikely_cond
  80         .p2align        2
  81 unlikely_cond:
  82         .long   0                       # 0x0
  83
  84         .section        .debug$S,"dr"
  85         .p2align        2
  86         .long   4                       # Debug section magic
  87         .long   246                     # Inlinee lines subsection
  88         .long   .Ltmp9-.Ltmp8           # Subsection size
  89 .Ltmp8:
  90         .long   0                       # Inlinee lines signature
  91
  92                                         # Inlined function f starts at t.cpp:3
  93         .long   4098                    # Type index of inlined function
  94         .long   0                       # Offset into filechecksum table
  95         .long   3                       # Starting line number
  96 .Ltmp9:
  97         .p2align        2
  98         .long   241                     # Symbol subsection for g
  99         .long   .Ltmp11-.Ltmp10         # Subsection size
 100 .Ltmp10:
 101         .short  .Ltmp13-.Ltmp12         # Record length
 102 .Ltmp12:
 103         .short  4423                    # Record kind: S_GPROC32_ID
 104         .long   0                       # PtrParent
 105         .long   0                       # PtrEnd
 106         .long   0                       # PtrNext
 107         .long   .Lfunc_end0-g           # Code size
 108         .long   0                       # Offset after prologue
 109         .long   0                       # Offset before epilogue
 110         .long   4099                    # Function type index
 111         .secrel32       g               # Function section relative address
 112         .secidx g                       # Function section index
 113         .byte   0                       # Flags
 114         .asciz  "g"                     # Function name
 115 .Ltmp13:
 116         .short  .Ltmp15-.Ltmp14         # Record length
 117 .Ltmp14:
 118         .short  4429                    # Record kind: S_INLINESITE
 119         .long   0                       # PtrParent
 120         .long   0                       # PtrEnd
 121         .long   4098                    # Inlinee type index
 122         .cv_inline_linetable    1 1 3 .Lfunc_begin0 .Lfunc_end0
 123 .Ltmp15:
 124         .short  2                       # Record length
 125         .short  4430                    # Record kind: S_INLINESITE_END
 126         .short  2                       # Record length
 127         .short  4431                    # Record kind: S_PROC_ID_END
 128 .Ltmp11:
 129         .p2align        2
 130         .cv_linetable   0, g, .Lfunc_end0
 131         .long   241                     # Symbol subsection for globals
 132         .long   .Ltmp17-.Ltmp16         # Subsection size
 133 .Ltmp16:
 134         .short  .Ltmp19-.Ltmp18         # Record length
 135 .Ltmp18:
 136         .short  4365                    # Record kind: S_GDATA32
 137         .long   4100                    # Type
 138         .secrel32       unlikely_cond   # DataOffset
 139         .secidx unlikely_cond           # Segment
 140         .asciz  "unlikely_cond"         # Name
 141 .Ltmp19:
 142 .Ltmp17:
 143         .p2align        2
 144         .cv_filechecksums               # File index to string table offset subsection
 145         .cv_stringtable                 # String table
 146         .section        .debug$T,"dr"
 147         .p2align        2
 148         .long   4                       # Debug section magic
 149         # ArgList (0x1000) {
 150         #   TypeLeafKind: LF_ARGLIST (0x1201)
 151         #   NumArgs: 0
 152         #   Arguments [
 153         #   ]
 154         # }
 155         .byte   0x06, 0x00, 0x01, 0x12
 156         .byte   0x00, 0x00, 0x00, 0x00
 157         # Procedure (0x1001) {
 158         #   TypeLeafKind: LF_PROCEDURE (0x1008)
 159         #   ReturnType: void (0x3)
 160         #   CallingConvention: NearC (0x0)
 161         #   FunctionOptions [ (0x0)
 162         #   ]
 163         #   NumParameters: 0
 164         #   ArgListType: () (0x1000)
 165         # }
 166         .byte   0x0e, 0x00, 0x08, 0x10
 167         .byte   0x03, 0x00, 0x00, 0x00
 168         .byte   0x00, 0x00, 0x00, 0x00
 169         .byte   0x00, 0x10, 0x00, 0x00
 170         # FuncId (0x1002) {
 171         #   TypeLeafKind: LF_FUNC_ID (0x1601)
 172         #   ParentScope: 0x0
 173         #   FunctionType: void () (0x1001)
 174         #   Name: f
 175         # }
 176         .byte   0x0e, 0x00, 0x01, 0x16
 177         .byte   0x00, 0x00, 0x00, 0x00
 178         .byte   0x01, 0x10, 0x00, 0x00
 179         .byte   0x66, 0x00, 0xf2, 0xf1
 180         # FuncId (0x1003) {
 181         #   TypeLeafKind: LF_FUNC_ID (0x1601)
 182         #   ParentScope: 0x0
 183         #   FunctionType: void () (0x1001)
 184         #   Name: g
 185         # }
 186         .byte   0x0e, 0x00, 0x01, 0x16
 187         .byte   0x00, 0x00, 0x00, 0x00
 188         .byte   0x01, 0x10, 0x00, 0x00
 189         .byte   0x67, 0x00, 0xf2, 0xf1
 190         # Modifier (0x1004) {
 191         #   TypeLeafKind: LF_MODIFIER (0x1001)
 192         #   ModifiedType: int (0x74)
 193         #   Modifiers [ (0x2)
 194         #     Volatile (0x2)
 195         #   ]
 196         # }
 197         .byte   0x0a, 0x00, 0x01, 0x10
 198         .byte   0x74, 0x00, 0x00, 0x00
 199         .byte   0x02, 0x00, 0xf2, 0xf1
 200