gcc/testsuite/gcc.dg/vect/vect-reduc-dot-u8a.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 DOT 43680
  14
  15 unsigned char X[N] __attribute__ ((__aligned__(__BIGGEST_ALIGNMENT__))) = {0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63};
  16 unsigned char Y[N] __attribute__ ((__aligned__(__BIGGEST_ALIGNMENT__))) = {64,63,62,61,60,59,58,57,56,55,54,53,52,51,50,49,48,47,46,45,44,43,42,41,40,39,38,37,36,35,34,33,32,31,30,29,28,27,26,25,24,23,22,21,20,19,18,17,16,15,14,13,12,11,10,9,8,7,6,5,4,3,2,1};
  17
  18 /* char->short->int dot product.
  19    Detected as a dot-product pattern.
  20    Should be vectorized on targets that support dot-product for unsigned chars
  21    (vect_udot_qi),
  22    and on targets that support widening-multiplication and widening-summation
  23    (vect_widen_mult_qi && vec_widen_sum_qi_to_si).
  24    Widening-multiplication can also be supported by type promotion and non-widening
  25    multiplication (vect_unpack && vect_short_mult);
  26    Widening summation can also be supported by type promotion and non-widening
  27    summation (vect_unpack).
  28    */
  29 __attribute__ ((noinline)) unsigned int
  30 foo (int len) {
  31   int i;
  32   unsigned int result = 0;
  33   unsigned short prod;
  34
  35   for (i=0; i<len; i++) {
  36     prod = X[i] * Y[i];
  37     result += prod;
  38   }
  39   return result;
  40 }
  41
  42 int main (void)
  43 {
  44   unsigned int dot;
  45   int i;
  46
  47   check_vect ();
  48
  49   dot = foo (N);
  50   if (dot != DOT)
  51     abort ();
  52
  53   return 0;
  54 }
  55
  56 /* { dg-final { scan-tree-dump-times "vect_recog_dot_prod_pattern: detected(?:(?!failed)(?!Re-trying).)*succeeded" 1 "vect" { target { vect_udot_qi || { vect_widen_mult_qi_to_hi && vect_widen_sum_qi_to_si } } } } } */
  57 /* { dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect" { target vect_udot_qi } } } */
  58 /* { dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect" { target { vect_widen_mult_qi_to_hi && vect_widen_sum_qi_to_si } } } } */
  59
  60