gnu/dist/gcc4/gcc/testsuite/gcc.dg/20020919-1.c

   1 /* Copyright (C) 2002  Free Software Foundation.
   2    by Hans-Peter Nilsson  <hp@axis.com>
   3
   4    Making sure that asm clobbers conflicting with asm-declared input
   5    operands are detected: ``You may not write a clobber description in a
   6    way that overlaps with an input or output operand''.
   7
   8    You must be this tall ---> fit two long longs in asm-declared registers
   9    to enter this amusement.  */
  10
  11 /* { dg-do compile { target alpha-*-* cris-*-* i?86-*-* mmix-*-* powerpc-*-* rs6000-*-* x86_64-*-* } } */
  12 /* { dg-options "-O2" } */
  13
  14 /* Constructed examples; input/output (same register), output, input, and
  15    input and output (different registers).  */
  16
  17 /* The long longs are used to test overlap overlap for multi-register
  18    registers.  REG2 and REG4 must be the second halves (defined as
  19    higher-numbered parts) of REG1 and REG3 respectively when two registers
  20    are needed.  */
  21
  22 #if defined (__alpha__)
  23 # define REG1 "$1"
  24 # define REG2 "$2"
  25 #elif defined (__CRIS__)
  26 # define REG1 "r10"
  27 # define REG2 "r11"
  28 # define REG3 "r12"
  29 # define REG4 "r13"
  30 # define REG5 "r9"
  31 #elif defined (__i386__)
  32 # define REG1 "%eax"
  33 # define REG2 "%edx"
  34 /* On Darwin -fpic is on by default, so don't use %ebx. */
  35 # define REG3 "%esi"
  36 # define REG4 "%edi"
  37 #elif defined (__MMIX__)
  38 # define REG1 "$8"
  39 # define REG2 "$9"
  40 #elif defined (__powerpc__) || defined (__PPC__) || defined (__ppc__) \
  41         || defined (__POWERPC__) || defined (PPC) || defined (_IBMR2)
  42 # define REG1 "6"
  43 # define REG2 "7"
  44 # define REG3 "8"
  45 # define REG4 "9"
  46 #elif defined (__x86_64__)
  47 # define REG1 "rax"
  48 # define REG2 "rdx"
  49 #endif
  50
  51 /* For readability of the tests.  */
  52 #ifdef REG3
  53 # define REG1a REG1
  54 # define REG1b REG2
  55 # define REG2a REG3
  56 # define REG2b REG4
  57 #else
  58 # define REG1a REG1
  59 # define REG1b REG1
  60 # define REG2a REG2
  61 # define REG2b REG2
  62 #endif
  63
  64 /* REG5 is just another reg if there is one; the difference to REG4 is to
  65    keep the original set of registers for CRIS.  */
  66 #ifndef REG5
  67 #define REG5 REG2b
  68 #endif
  69
  70 void *
  71 foo (void *p)
  72 {
  73   register void *q asm (REG1) = p;
  74   asm ("foo1 %0" : "=r" (q) : "0" (q) : REG1); /* { dg-error "conflict" } */
  75   return q;
  76 }
  77
  78 void *
  79 nfoo (void *p)
  80 {
  81   register void *q asm (REG1) = p;
  82   asm ("foo1 %0" : "=r" (q) : "0" (q) : REG2);
  83   return q;
  84 }
  85
  86 long long
  87 foolla (long long llp)
  88 {
  89   register long long ll asm (REG1a) = llp;
  90   asm ("foo1a %0" : "=r" (ll) : "0" (ll) : REG1a); /* { dg-error "conflict" } */
  91   return ll;
  92 }
  93
  94 long long
  95 nfoolla (long long llp)
  96 {
  97   register long long ll asm (REG1a) = llp;
  98   asm ("foo1a %0" : "=r" (ll) : "0" (ll) : REG2a);
  99   return ll;
 100 }
 101
 102 long long
 103 foollb (long long llp)
 104 {
 105   register long long ll asm (REG1a) = llp;
 106   asm ("foo1b %0" : "=r" (ll) : "0" (ll) : REG1b); /* { dg-error "conflict" } */
 107   return ll;
 108 }
 109
 110 void *
 111 bar (void *p)
 112 {
 113   register void *q asm (REG1);
 114   register void *w asm (REG2) = p;
 115   asm ("bar1 %1,%0" : "=r" (q) : "r" (w) : REG1); /* { dg-error "conflict" } */
 116   return q;
 117 }
 118
 119 long long
 120 barlla (long long llp)
 121 {
 122   register long long ll asm (REG1a);
 123   register long long mm asm (REG2a) = llp;
 124   asm ("bar1a %1,%0" : "=r" (ll) : "r" (mm) : REG1b); /* { dg-error "conflict" } */
 125   return ll;
 126 }
 127
 128 long long
 129 barllb (long long llp)
 130 {
 131   register long long ll asm (REG1a);
 132   register long long mm asm (REG2a) = llp;
 133   asm ("bar1b %1,%0" : "=r" (ll) : "r" (mm) : REG2b); /* { dg-error "conflict" } */
 134   return ll;
 135 }
 136
 137 void *
 138 foobar (void *p)
 139 {
 140   register void *q asm (REG1);
 141   register void *w asm (REG2) = p;
 142   asm ("foobar1 %1,%0" : "=r" (q) : "r" (w) : REG2); /* { dg-error "conflict" } */
 143   return q;
 144 }
 145
 146 void *
 147 nfoobar (void *p)
 148 {
 149   register void *q asm (REG1);
 150   register void *w = p;
 151   asm ("foobar1 %1,%0" : "=r" (q) : "r" (w) : REG2);
 152   return q;
 153 }
 154
 155 long long
 156 foobarlla (long long llp)
 157 {
 158   register long long ll asm (REG1a);
 159   register long long mm asm (REG2a) = llp;
 160   asm ("foobar1a %1,%0" : "=r" (ll) : "r" (mm) : REG1b); /* { dg-error "conflict" } */
 161   return ll;
 162 }
 163
 164 long long
 165 nfoobarlla (long long llp)
 166 {
 167   register long long ll asm (REG1a);
 168   register long long mm = llp;
 169   asm ("foobar1a %1,%0" : "=r" (ll) : "r" (mm) : REG2a);
 170   return ll;
 171 }
 172
 173 long long
 174 foobarllb (long long llp)
 175 {
 176   register long long ll asm (REG1a);
 177   register long long mm asm (REG2a) = llp;
 178   asm ("foobar1b %1,%0" : "=r" (ll) : "r" (mm) : REG2b); /* { dg-error "conflict" } */
 179   return ll;
 180 }
 181
 182 long long
 183 nfoobarllb (long long llp)
 184 {
 185   register long long ll asm (REG1a);
 186   register long long mm = llp;
 187   asm ("foobar1b %1,%0" : "=r" (ll) : "r" (mm) : REG2b);
 188   return ll;
 189 }
 190
 191 void *
 192 baz (void *p)
 193 {
 194   register void *q asm (REG1);
 195   register void *w asm (REG2) = p;
 196   asm ("baz1 %1,%0" : "=r" (q) : "r" (w) : REG1, REG2); /* { dg-error "conflict" } */
 197   return q;
 198 }
 199
 200 void *
 201 nbaz (void *p)
 202 {
 203   register void *q;
 204   register void *w = p;
 205   asm ("baz1 %1,%0" : "=r" (q) : "r" (w) : REG1, REG2);
 206   return q;
 207 }
 208
 209 void *
 210 nbaz2 (void *p)
 211 {
 212   register void *q asm (REG1);
 213   register void *w asm (REG2) = p;
 214   asm ("baz1 %1,%0" : "=r" (q) : "r" (w));
 215   return q;
 216 }
 217
 218 long long
 219 bazlla (long long llp)
 220 {
 221   register long long ll asm (REG1a);
 222   register long long mm asm (REG2a) = llp;
 223   asm ("baz1a %1,%0" : "=r" (ll) : "r" (mm) : REG1a, REG2a); /* { dg-error "conflict" } */
 224   return ll;
 225 }
 226
 227 long long
 228 bazllb (long long llp)
 229 {
 230   register long long ll asm (REG1a);
 231   register long long mm asm (REG2a) = llp;
 232   asm ("baz2a %1,%0" : "=r" (ll) : "r" (mm) : REG1b, REG2b); /* { dg-error "conflict" } */
 233   return ll;
 234 }
 235
 236 /* Real-world example of bug.  */
 237
 238 struct stat;
 239 int
 240 _dl_stat (const char *file_name, struct stat *buf)
 241 {
 242   register long a asm (REG1) = (long) file_name;
 243   register long b asm (REG2) = (long) buf;
 244
 245   asm volatile ("movu.w %1,$r9\n\tbreak 13" : "=r" (a) : "g" (106), "0" (a), "r" (b) : REG1, REG5); /* { dg-error "conflict" } */
 246   if (a >= 0)
 247     return (int) a;
 248   return (int) -1;
 249 }