gcc/testsuite/gcc.dg/recip_sqrt_mult_5.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-Ofast -fdump-tree-recip" } */
   3 /* { dg-additional-options "-fcompare-debug" { target { ! powerpc-ibm-aix* } } } */
   4
   5 /* We want to do the recip_sqrt transformations here there is already
   6    a multiplication on the main path.  */
   7
   8 double res, res2, tmp;
   9 void
  10 foo (double a, double b, int c, int d)
  11 {
  12   tmp = 1.0 / __builtin_sqrt (a);
  13   res = tmp * tmp;
  14
  15   if (d)
  16     res2 = a * tmp;
  17 }
  18
  19 /* { dg-final { scan-tree-dump "Optimizing reciprocal sqrt multiplications" "recip" } } */
  20 /* { dg-final { scan-tree-dump "Replacing squaring multiplication" "recip" } } */
  21 /* { dg-final { scan-tree-dump "Replacing original division" "recip" } } */