main/gcc/testsuite/gcc.dg/vect/vect-reduc-dot-s16c.c

   1 /* { dg-require-effective-target vect_int } */
   2
   3 #include <stdarg.h>
   4 #include "tree-vect.h"
   5
   6 #define N 64
   7 #define DOT 43680
   8
   9 signed short X[N] __attribute__ ((__aligned__(__BIGGEST_ALIGNMENT__)));
  10 signed int   Y[N] __attribute__ ((__aligned__(__BIGGEST_ALIGNMENT__)));
  11
  12 /* (short, int)->int->int dot product.
  13    Not detected as a dot-product pattern.  */
  14
  15 __attribute__ ((noinline)) int
  16 foo (int len)
  17 {
  18   int i;
  19   int result = 0;
  20
  21   for (i = 0; i < len; i++)
  22     {
  23       result += (X[i] * Y[i]);
  24     }
  25   return result;
  26 }
  27
  28
  29 /* (int, short)->int->int dot product.
  30    Not detected as a dot-product pattern.  */
  31
  32 __attribute__ ((noinline)) int
  33 bar (int len)
  34 {
  35   int i;
  36   int result = 0;
  37
  38   for (i = 0; i < len; i++)
  39     {
  40       result += (Y[i] * X[i]);
  41     }
  42   return result;
  43 }
  44
  45 int
  46 main (void)
  47 {
  48   int i;
  49   int dot;
  50
  51   check_vect ();
  52
  53   for (i = 0; i < N; i++)
  54     {
  55       X[i] = i;
  56       Y[i] = N - i;
  57       __asm__ volatile ("");
  58     }
  59
  60   dot = foo (N);
  61   if (dot != DOT)
  62     abort ();
  63
  64   dot = bar (N);
  65   if (dot != DOT)
  66     abort ();
  67
  68   return 0;
  69 }
  70
  71 /* { dg-final { scan-tree-dump-times "vectorized 1 loops" 2 "vect" { target vect_unpack } } } */
  72 /* { dg-final { cleanup-tree-dump "vect" } } */
  73