old-autovect-branch/gcc/testsuite/gcc.dg/vect/vect-reduc-dot-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 #define DOT1 43680
   9 #define DOT2 43680
  10
  11 signed short X[N] __attribute__ ((__aligned__(16)));
  12 signed short Y[N] __attribute__ ((__aligned__(16)));
  13
  14 /* short->short->int dot product. Not vectorized. */
  15 int
  16 foo1(int len) {
  17   int i;
  18   int result = 0;
  19   short prod;
  20
  21   for (i=0; i<len; i++) {
  22     prod = X[i] * Y[i];
  23     result += prod;
  24   }
  25   return result;
  26 }
  27
  28 /* short->int->int dot product. Vectorized on ppc. */
  29 int
  30 foo2(int len) {
  31   int i;
  32   int result = 0;
  33
  34   for (i=0; i<len; i++) {
  35     result += (X[i] * Y[i]);
  36   }
  37   return result;
  38 }
  39
  40
  41 int main (void)
  42 {
  43   int i, dot1, dot2;
  44
  45   check_vect ();
  46
  47   for (i=0; i<N; i++) {
  48     X[i] = i;
  49     Y[i] = 64-i;
  50   }
  51
  52   dot1 = foo1 (N);
  53   if (dot1 != DOT1)
  54     abort ();
  55
  56   dot2 = foo2 (N);
  57   if (dot2 != DOT2)
  58     abort ();
  59
  60   return 0;
  61 }
  62
  63 /* { dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect" { target powerpc*-*-* } } } */
  64 /* { dg-final { cleanup-tree-dump "vect" } } */
  65