gcc/testsuite/gcc.dg/guality/pr43177.c

/* { dg-do run } */
/* { dg-options "-g" } */

void __attribute__((noinline))
bar (long x)
{
  asm volatile ("" : : "r" (x) : "memory");
}

long __attribute__((noinline))
foo (long x)
{
  long l = x + 3;
  bar (l);/* { dg-final { gdb-test .+1 "l" "10" } } */
  bar (l);/* { dg-final { gdb-test . "x" "7" } } */
  return l;
}

long __attribute__((noinline))
baz (int x)
{
  long l = x + 3;
  bar (l);/* { dg-final { gdb-test .+1 "l" "10" } } */
  bar (l);/* { dg-final { gdb-test . "x" "7" } } */
  return l;
}

int
main (void)
{
  int i;
  asm volatile ("" : "=r" (i) : "0" (7));
  foo (i);
  baz (i);
  return 0;
}