[Bug middle-end/48597] x86-64 unwind register save location misses half-register write?

[jakub at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48597

--- Comment #7 from Jakub Jelinek <jakub at gcc dot gnu.org> 2011-04-14 
12:38:16 UTC ---
void
foo (void)
{
  register long s __asm ("r13");
  register long t __asm ("r14");
  register long u __asm ("r15");
  asm volatile ("xorq %%r12, %%r12" : : : "r12");
  asm volatile ("xorq %0, %0" : "=r" (s));
  asm volatile ("xorq %0, %0" : "=r" (t));
  asm volatile ("xorq %0, %0" : "=r" (u));
}

Alternative testcase to also test if queued register saves are found in inline
asm clobbers.