gcc/testsuite/gcc.dg/vect/slp-9.c

   1 /* { dg-require-effective-target vect_int } */
   2 /* { dg-additional-options "-fno-early-inlining" } */
   3
   4 #include <stdarg.h>
   5 #include "tree-vect.h"
   6
   7 #define N 64
   8
   9 short X[N] __attribute__ ((__aligned__(__BIGGEST_ALIGNMENT__)));
  10 short Y[N] __attribute__ ((__aligned__(__BIGGEST_ALIGNMENT__)));
  11 int result[N];
  12
  13 /* short->int widening-mult */
  14 int
  15 foo1(int len) {
  16   int i;
  17
  18   for (i=0; i<len/2; i++) {
  19     result[2*i] = X[2*i] * Y[2*i];
  20     result[2*i+1] = X[2*i+1] * Y[2*i+1];
  21   }
  22 }
  23
  24 int main (void)
  25 {
  26   int i;
  27
  28   check_vect ();
  29
  30   for (i=0; i<N; i++) {
  31     X[i] = i;
  32     Y[i] = 64-i;
  33     __asm__ volatile ("");
  34   }
  35
  36   foo1 (N);
  37
  38   for (i=0; i<N; i++) {
  39     if (result[i] != X[i] * Y[i])
  40       abort ();
  41   }
  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 "vectorizing stmts using SLP" 1 "vect" { target vect_widen_mult_hi_to_si } } } */
  48