gcc/testsuite/gcc.dg/vect/vect-reduc-sad-1.c

   1 /* { dg-require-effective-target vect_int } */
   2
   3 #include "tree-vect.h"
   4
   5 #define N 50
   6
   7 #ifndef SIGNEDNESS_1
   8 #define SIGNEDNESS_1 unsigned
   9 #define SIGNEDNESS_2 unsigned
  10 #define SIGNEDNESS_3 unsigned
  11 #endif
  12
  13 SIGNEDNESS_1 int __attribute__ ((noipa))
  14 f (SIGNEDNESS_1 int res, SIGNEDNESS_3 char *restrict a,
  15    SIGNEDNESS_3 char *restrict b)
  16 {
  17   for (__INTPTR_TYPE__ i = 0; i < N; ++i)
  18     {
  19       int av = a[i];
  20       int bv = b[i];
  21       short diff = av - bv;
  22       SIGNEDNESS_2 short abs = diff < 0 ? -diff : diff;
  23       res += abs;
  24     }
  25   return res;
  26 }
  27
  28 #define BASE1 ((SIGNEDNESS_3 int) -1 < 0 ? -126 : 4)
  29 #define BASE2 ((SIGNEDNESS_3 int) -1 < 0 ? 116 : 220)
  30
  31 int
  32 main (void)
  33 {
  34   check_vect ();
  35
  36   SIGNEDNESS_3 char a[N], b[N];
  37   int expected = 0x12345;
  38   for (int i = 0; i < N; ++i)
  39     {
  40       a[i] = BASE1 + i * 5;
  41       b[i] = BASE1 - i * 4;
  42       asm volatile ("" ::: "memory");
  43       int diff = a[i] - b[i];
  44       expected += (SIGNEDNESS_2 short) (diff < 0 ? -diff : diff);
  45     }
  46   if (f (0x12345, a, b) != expected)
  47     __builtin_abort ();
  48 }
  49
  50 /* { dg-final { scan-tree-dump "vect_recog_sad_pattern: detected" "vect" } } */
  51 /* { dg-final { scan-tree-dump-times "vectorized 1 loop" 1 "vect" { target vect_sdot_qi } } } */