gcc/testsuite/gcc.target/powerpc/swaps-p8-23.c

   1 /* { dg-do compile { target { powerpc64le-*-* } } } */
   2 /* { dg-skip-if "do not override -mcpu" { powerpc*-*-* } { "-mcpu=*" } { "-mcpu=power8" } } */
   3 /* { dg-options "-mcpu=power8 -O3 -ffast-math" } */
   4 /* { dg-final { scan-assembler "lxvd2x" } } */
   5 /* { dg-final { scan-assembler-not "xxpermdi" } } */
   6
   7 /* Verify that swap optimization works correctly in the presence of
   8    a V2DFmode reduction.  */
   9
  10 extern double optvalue;
  11 extern void obfuscate (double, unsigned int);
  12
  13 void
  14 foo (double *x, double *y, unsigned int n, unsigned int m)
  15 {
  16   unsigned int i, j;
  17   double sacc;
  18   for (j = 0; j < m; ++j)
  19     {
  20       sacc = 0.0;
  21       for (i = 0; i < n; ++i)
  22         sacc += x[i] * y[i];
  23       obfuscate (sacc, n);
  24     }
  25   optvalue = n * 2.0 * m;
  26 }