gcc/testsuite/gcc.dg/vect/slp-simd-clone-1.c

   1 /* { dg-require-effective-target vect_simd_clones } */
   2 /* { dg-additional-options "-fopenmp-simd" } */
   3
   4 #include "tree-vect.h"
   5
   6 int x[1024];
   7
   8 #pragma omp declare simd simdlen(4) notinbranch
   9 __attribute__((noinline)) int
  10 foo (int a, int b)
  11 {
  12   return a + b;
  13 }
  14
  15 void __attribute__((noipa))
  16 bar (void)
  17 {
  18 #pragma omp simd
  19   for (int i = 0; i < 512; i++)
  20     {
  21       x[2*i+0] = foo (x[2*i+0], x[2*i+0]);
  22       x[2*i+1] = foo (x[2*i+1], x[2*i+1]);
  23     }
  24 }
  25
  26 int
  27 main ()
  28 {
  29   int i;
  30   check_vect ();
  31
  32 #pragma GCC novector
  33   for (i = 0; i < 1024; i++)
  34     x[i] = i;
  35
  36   bar ();
  37
  38 #pragma GCC novector
  39   for (i = 0; i < 1024; i++)
  40     if (x[i] != i + i)
  41       abort ();
  42
  43   return 0;
  44 }
  45
  46 /* { dg-final { scan-tree-dump "vectorizing stmts using SLP" "vect" } } */