gcc/testsuite/gcc.dg/vect/vect-widen-mult-half.c

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