gcc/testsuite/gcc.dg/vect/vect-widen-mult-s16.c

   1 /* { dg-require-effective-target vect_int } */
   2
   3 #include <stdarg.h>
   4 #include "tree-vect.h"
   5
   6 #define N 64
   7
   8 short X[N] __attribute__ ((__aligned__(__BIGGEST_ALIGNMENT__)));
   9 short Y[N] __attribute__ ((__aligned__(__BIGGEST_ALIGNMENT__)));
  10 int result[N];
  11
  12 /* short->int widening-mult */
  13 __attribute__ ((noinline)) int
  14 foo1(int len) {
  15   int i;
  16
  17   for (i=0; i<len; i++) {
  18     result[i] = X[i] * Y[i];
  19   }
  20 }
  21
  22 int main (void)
  23 {
  24   int i;
  25
  26   check_vect ();
  27
  28   for (i=0; i<N; i++) {
  29     X[i] = i;
  30     Y[i] = 64-i;
  31     __asm__ volatile ("");
  32   }
  33
  34   foo1 (N);
  35
  36 #pragma GCC novector
  37   for (i=0; i<N; i++) {
  38     if (result[i] != X[i] * Y[i])
  39       abort ();
  40   }
  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