gcc/testsuite/gcc.target/powerpc/swaps-p8-24.c

   1 /* { dg-do compile { target { powerpc64le-*-* } } } */
   2 /* { dg-options "-mdejagnu-cpu=power8 -O3 -ffast-math" } */
   3 /* { dg-final { scan-assembler "lxvd2x" } } */
   4 /* { dg-final { scan-assembler-not "xxpermdi" } } */
   5
   6 /* Verify that swap optimization works correctly in the presence of
   7    a V4SFmode reduction.  */
   8
   9 extern double optvalue;
  10 extern void obfuscate (float, unsigned int);
  11
  12 void
  13 foo (float *x, float *y, unsigned int n, unsigned int m)
  14 {
  15   unsigned int i, j;
  16   float sacc;
  17   for (j = 0; j < m; ++j)
  18     {
  19       sacc = 0.0f;
  20       for (i = 0; i < n; ++i)
  21         sacc += x[i] * y[i];
  22       obfuscate (sacc, n);
  23     }
  24   optvalue = n * 2.0f * m;
  25 }