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gcc 7
author kono
date Fri, 27 Oct 2017 22:46:09 +0900
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// PR tree-optimization/55331
// { dg-do compile }
// { dg-options "-O2 -fno-tree-fre" }

struct A {};

void
foo (A *p, bool x)
{
  A a;
  char *e = (char *) (&a + 1);
  if (x)
    __builtin_memmove (p, &a, e - (char *) &a);
}