gcc/testsuite/gcc.target/i386/20020616-1.c

   1 /* PR opt/6722 */
   2 /* { dg-do run } */
   3 /* { dg-options "-O2" } */
   4
   5 #if !__PIC__
   6 register int k asm("%ebx");
   7 #elif __amd64
   8 register int k asm("%r12");
   9 #else
  10 register int k asm("%esi");
  11 #endif
  12
  13 void __attribute__((noinline))
  14 foo()
  15 {
  16   k = 1;
  17 }
  18
  19 void test()
  20 {
  21   int i;
  22   for (i = 0; i < 10; i += k)
  23     {
  24       k = 0;
  25       foo();
  26     }
  27 }
  28
  29 int main()
  30 {
  31   int old = k;
  32   test();
  33   k = old;
  34   return 0;
  35 }