gcc/testsuite/gcc.dg/tree-ssa/pr71185.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O3" } */
   3 /* { dg-options "-O3 -march=barcelona" { target x86_64-*-* i?86-*-* } } */
   4
   5 union U { struct S { int l; int m; } p; long long a; } b;
   6 int a, c;
   7
   8 void
   9 foo ()
  10 {
  11   for (; b.p.m; b.a += c)
  12     a = b.p.l / 65536.0 * 65536.0;
  13 }