gcc/testsuite/gcc.dg/vect/vect-reduc-dot-s8a.c

   1 /* Disabling epilogues until we find a better way to deal with scans.  */
   2 /* { dg-additional-options "--param vect-epilogues-nomask=0" } */
   3 /* { dg-require-effective-target vect_int } */
   4 /* { dg-require-effective-target arm_v8_2a_dotprod_neon_hw { target { aarch64*-*-* || arm*-*-* } } } */
   5 /* { dg-additional-options "-march=armv8.2-a+dotprod" { target { aarch64*-*-* } } } */
   6 /* { dg-add-options arm_v8_2a_dotprod_neon }  */
   7
   8 #include <stdarg.h>
   9 #include "tree-vect.h"
  10
  11 #define N 64
  12
  13 #define DOT1 43680
  14
  15 signed char X[N] __attribute__ ((__aligned__(__BIGGEST_ALIGNMENT__)));
  16 signed char Y[N] __attribute__ ((__aligned__(__BIGGEST_ALIGNMENT__)));
  17
  18 /* char->short->int dot product.
  19    The dot-product pattern should be detected.
  20    Vectorizable on vect_sdot_qi targets (targets that support dot-product of
  21    signed chars).
  22
  23    In the future could also be vectorized as widening-mult + widening-summation,
  24    or with type-conversion support.
  25  */
  26 __attribute__ ((noinline)) int
  27 foo1(int len) {
  28   int i;
  29   int result = 0;
  30   short prod;
  31
  32   for (i=0; i<len; i++) {
  33     prod = X[i] * Y[i];
  34     result += prod;
  35   }
  36   return result;
  37 }
  38
  39 int main (void)
  40 {
  41   int i, dot1;
  42
  43   check_vect ();
  44
  45   for (i=0; i<N; i++) {
  46     X[i] = i;
  47     Y[i] = 64-i;
  48     __asm__ volatile ("");
  49   }
  50
  51   dot1 = foo1 (N);
  52   if (dot1 != DOT1)
  53     abort ();
  54
  55   return 0;
  56 }
  57
  58 /* { dg-final { scan-tree-dump-times "vect_recog_dot_prod_pattern: detected(?:(?!Analysis failed).)*Analysis succeeded" 1 "vect" { target { vect_sdot_qi || { vect_widen_mult_qi_to_hi && vect_widen_sum_hi_to_si } } } } } */
  59 /* { dg-final { scan-tree-dump-times "vect_recog_widen_mult_pattern: detected(?:(?!Analysis failed).)*Analysis succeeded" 1 "vect" { target { vect_sdot_qi || { vect_widen_mult_qi_to_hi && vect_widen_sum_hi_to_si } } } } } */
  60 /* { dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect" { target vect_sdot_qi } } } */
  61 /* { dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect" { target { vect_widen_mult_qi_to_hi && vect_widen_sum_hi_to_si } } } } */
  62