gcc/testsuite/gcc.dg/pr80492.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-w -O2 -fdump-tree-optimized" } */
   3
   4 static __inline__ __attribute__((__always_inline__))
   5 void syscall_7 (int val)
   6 {
   7   register int reg __asm ("4") = val;
   8   __asm __volatile__ ("/* Some Code %0 */" :: "r" (reg));
   9 }
  10
  11 void do_syscalls (void)
  12 {
  13   for (int s = 0; s < 2; s++)
  14     {
  15       syscall_7 (0);
  16       syscall_7 (1);
  17     }
  18 }
  19
  20 /* { dg-final { scan-tree-dump-times "reg = " 4 "optimized" } } */