gcc/testsuite/gcc.target/i386/avx512f-vect-perm-1.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O2 -ftree-vectorize -ffast-math -march=knl" } */
   3 /* { dg-final { scan-assembler-times "vpermps\[ \\t\]+\[^\{\n\]*%zmm\[0-9\]+(?:\n|\[ \\t\]+#)" 1 } } */
   4
   5 #define N 1024
   6 float f1[N] __attribute__ ((__aligned__(__BIGGEST_ALIGNMENT__)));
   7 float f2[N] __attribute__ ((__aligned__(__BIGGEST_ALIGNMENT__)));
   8
   9 void foo ()
  10 {
  11   int j;
  12   for (j=0; j<N; j++)
  13     f1[j] += f2[N-j];
  14 }