slp-widen-mult-half.c

   1 /* { dg-require-effective-target vect_int } */
   2
   3 #include "tree-vect.h"
   4 #include <stdlib.h>
   5
   6 #define N 32
   7 #define COEF 32470
   8 #define COEF2 324700
   9
  10 unsigned char in[N];
  11 int out[N];
  12 int out2[N];
  13
  14 __attribute__ ((noinline)) void
  15 foo ()
  16 {
  17   int i;
  18
  19   for (i = 0; i < N/2; i++)
  20     {
  21       out[2*i] = in[2*i] * COEF;
  22       out2[2*i] = in[2*i] + COEF2;
  23       out[2*i+1] = in[2*i+1] * COEF;
  24       out2[2*i+1] = in[2*i+1] + COEF2;
  25     }
  26 }
  27
  28 int main (void)
  29 {
  30   int i;
  31
  32   for (i = 0; i < N; i++)
  33     {
  34       in[i] = i;
  35       __asm__ volatile ("");
  36     }
  37
  38   foo ();
  39
  40   for (i = 0; i < N; i++)
  41     if (out[i] != in[i] * COEF || out2[i] != in[i] + COEF2)
  42       abort ();
  43
  44   return 0;
  45 }
  46
  47 /* { dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect" { target vect_widen_mult_hi_to_si } } } */
  48 /* { dg-final { scan-tree-dump-times "vectorizing stmts using SLP" 2 "vect" { target vect_widen_mult_hi_to_si } } } */
  49 /* { dg-final { scan-tree-dump-times "vect_recog_widen_mult_pattern: detected" 2 "vect" { target vect_widen_mult_hi_to_si_pattern } } } */
  50 /* { dg-final { scan-tree-dump-times "pattern recognized" 2 "vect" { target vect_widen_mult_hi_to_si_pattern } } } */
  51 /* { dg-final { cleanup-tree-dump "vect" } } */
  52