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gcc 7
author kono
date Fri, 27 Oct 2017 22:46:09 +0900
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/* PR rtl-optimization/63637 */
/* { dg-do compile } */
/* { dg-options "-O2" } */

int
foo (void)
{
  int a, b, c;
  asm ("# Magic instruction" : "=r" (a));
  asm ("# Magic instruction" : "=r" (b));
  asm ("# Magic instruction" : "=r" (c));
  return a + b + c;
}

/* { dg-final { scan-assembler-times "# Magic instruction" 1 } } */