gcc/testsuite/gcc.dg/pr33619.c

   1 /* PR tree-optimization/33619 */
   2 /* { dg-do run } */
   3 /* { dg-options "-O2" } */
   4
   5 #ifdef __powerpc__
   6 # define REG1 __asm__ ("3")
   7 # define REG2 __asm__ ("4")
   8 #elif defined __x86_64__
   9 # define REG1 __asm__ ("rdi")
  10 # define REG2 __asm__ ("rsi")
  11 #else
  12 # define REG1
  13 # define REG2
  14 #endif
  15
  16 static inline void
  17 bar (unsigned long x, int y)
  18 {
  19   register unsigned long p1 REG1 = x;
  20   register unsigned long p2 REG2 = y;
  21   __asm__ volatile ("" : "=r" (p1), "=r" (p2) : "0" (p1), "1" (p2) : "memory");
  22   if (p1 != 0xdeadUL || p2 != 0xbefUL)
  23     __builtin_abort ();
  24 }
  25
  26 __attribute__((const, noinline)) int
  27 baz (int x)
  28 {
  29   return x;
  30 }
  31
  32 __attribute__((noinline)) void
  33 foo (unsigned long *x, int y)
  34 {
  35   unsigned long a = *x;
  36   bar (a, baz (y));
  37 }
  38
  39 int
  40 main (void)
  41 {
  42   unsigned long a = 0xdeadUL;
  43   foo (&a, 0xbefUL);
  44   return 0;
  45 }