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view gcc/testsuite/gcc.dg/recip_sqrt_mult_1.c @ 131:84e7813d76e9

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gcc-8.2
author mir3636
date Thu, 25 Oct 2018 07:37:49 +0900
parents
children 1830386684a0
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/* { dg-do compile } */
/* { dg-options "-Ofast -fdump-tree-recip" } */

double res, res2, tmp;
void
foo (double a, double b)
{
  tmp = 1.0 / __builtin_sqrt (a);
  res = tmp * tmp;
  res2 = a * tmp;
}

/* { dg-final { scan-tree-dump "Optimizing reciprocal sqrt multiplications" "recip" } } */
/* { dg-final { scan-tree-dump "Replacing squaring multiplication" "recip" } } */
/* { dg-final { scan-tree-dump "Replacing original division" "recip" } } */