gcc/testsuite/gcc.dg/20031102-1.c

   1 /* PR optimization/12799 */
   2 /* Origin: Pratap Subrahmanyam <pratap@vmware.com> */
   3
   4 /* { dg-do run } */
   5 /* { dg-options "-O2" } */
   6 /* { dg-options "-O2 -march=i686" { target i686-*-* } } */
   7
   8 /* Verify that reload_cse_move2add doesn't add unexpected CLOBBERs. */
   9
  10 extern void abort(void);
  11
  12 int loo = 1;
  13
  14 __inline__ char InlineFunc(void)
  15 {
  16   return __builtin_expect(!!(loo == 1), 1);
  17 }
  18
  19 int FooBar(void)
  20 {
  21   int i;
  22   int var1 = InlineFunc() ? 2046 : 1023;
  23   int var2 = InlineFunc() ? 512 : 1024;
  24
  25   for (i = 0; i < var1; i++)
  26     ;
  27
  28   if (InlineFunc() && var2 != 512)
  29     abort();
  30
  31   return 0;
  32 }
  33
  34 int main(void)
  35 {
  36   return FooBar();
  37 }