gcc/testsuite/gcc.dg/vect/vect-reduc-dot-20.c

   1 /* { dg-require-effective-target vect_int } */
   2 /* { dg-require-effective-target arm_v8_2a_dotprod_neon_hw { target { aarch64*-*-* || arm*-*-* } } } */
   3 /* { dg-add-options arm_v8_2a_dotprod_neon }  */
   4
   5 #include "tree-vect.h"
   6
   7 #define N 50
   8
   9 #ifndef SIGNEDNESS_1
  10 #define SIGNEDNESS_1 unsigned
  11 #define SIGNEDNESS_2 signed
  12 #define SIGNEDNESS_3 signed
  13 #define SIGNEDNESS_4 unsigned
  14 #endif
  15
  16 SIGNEDNESS_1 long long __attribute__ ((noipa))
  17 f (SIGNEDNESS_1 long long res, SIGNEDNESS_3 short *restrict a,
  18    SIGNEDNESS_4 char *restrict b)
  19 {
  20   for (__INTPTR_TYPE__ i = 0; i < N; ++i)
  21     {
  22       int av = a[i];
  23       int bv = b[i];
  24       SIGNEDNESS_2 long long mult = av * bv;
  25       res += mult;
  26     }
  27   return res;
  28 }
  29
  30 #define BASE ((SIGNEDNESS_3 int) -1 < 0 ? -126 : 4)
  31 #define OFFSET 20
  32
  33 int
  34 main (void)
  35 {
  36   check_vect ();
  37
  38   SIGNEDNESS_3 short a[N];
  39   SIGNEDNESS_4 char b[N];
  40   SIGNEDNESS_1 long long expected = 0x12345;
  41   for (int i = 0; i < N; ++i)
  42     {
  43       a[i] = BASE + i * 5;
  44       b[i] = BASE + OFFSET + i * 4;
  45       asm volatile ("" ::: "memory");
  46       expected += (SIGNEDNESS_2 int) (a[i] * b[i]);
  47     }
  48   if (f (0x12345, a, b) != expected)
  49     __builtin_abort ();
  50 }
  51
  52 /* { dg-final { scan-tree-dump "vect_recog_dot_prod_pattern: detected" "vect" } } */