gcc/testsuite/gcc.dg/vect/vect-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 (int a)
  16 {
  17   int i;
  18
  19   for (i = 0; i < N; i++)
  20     {
  21       out[i] = in[i] * COEF;
  22       out2[i] = in[i] + a;
  23     }
  24 }
  25
  26 int main (void)
  27 {
  28   int i;
  29
  30   for (i = 0; i < N; i++)
  31     {
  32       in[i] = i;
  33       __asm__ volatile ("");
  34     }
  35
  36   foo (COEF2);
  37
  38   for (i = 0; i < N; i++)
  39     if (out[i] != in[i] * COEF || out2[i] != in[i] + COEF2)
  40       abort ();
  41
  42   return 0;
  43 }
  44
  45 /* { dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect" { target vect_widen_mult_hi_to_si } } } */
  46 /* { dg-final { scan-tree-dump-times "vect_recog_widen_mult_pattern: detected" 1 "vect" { target vect_widen_mult_hi_to_si_pattern } } } */
  47 /* { dg-final { scan-tree-dump-times "pattern recognized" 1 "vect" { target vect_widen_mult_hi_to_si_pattern } } } */
  48 /* { dg-final { cleanup-tree-dump "vect" } } */
  49