gcc/testsuite/gcc.dg/vect/slp-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 ()
  15 {
  16   int i;
  17
  18   for (i = 0; i < N/2; i++)
  19     {
  20       out[2*i] = in[2*i] * COEF;
  21       out2[2*i] = in[2*i] + COEF2;
  22       out[2*i+1] = in[2*i+1] * COEF;
  23       out2[2*i+1] = in[2*i+1] + COEF2;
  24     }
  25 }
  26
  27 int main (void)
  28 {
  29   int i;
  30
  31   check_vect ();
  32
  33   for (i = 0; i < N; i++)
  34     {
  35       in[i] = i;
  36       __asm__ volatile ("");
  37     }
  38
  39   foo ();
  40
  41   for (i = 0; i < N; i++)
  42     if (out[i] != in[i] * COEF || out2[i] != in[i] + COEF2)
  43       abort ();
  44
  45   return 0;
  46 }
  47
  48 /* { dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect" { target vect_widen_mult_hi_to_si } } } */
  49 /* { dg-final { scan-tree-dump-times "vectorizing stmts using SLP" 2 "vect" { target vect_widen_mult_hi_to_si xfail vect_variable_length } } } */
  50 /* { dg-final { scan-tree-dump-times "vect_recog_widen_mult_pattern: detected" 2 "vect" { target vect_widen_mult_hi_to_si_pattern } } } */
  51 /* { dg-final { scan-tree-dump-times "pattern recognized" 2 "vect" { target vect_widen_mult_hi_to_si_pattern } } } */
  52