gcc/testsuite/gcc.dg/vect/bb-slp-26.c

   1 /* { dg-require-effective-target vect_int } */
   2
   3 #include <stdarg.h>
   4 #include "tree-vect.h"
   5
   6 #define A 3
   7 #define B 4
   8 #define N 256
   9
  10 char src[N], dst[N];
  11
  12 void __attribute__((noinline,noclone))
  13 foo (char * __restrict__ dst, char * __restrict__ src, int h, int stride)
  14 {
  15   int i;
  16   h /= 16;
  17   for (i = 0; i < h; i++)
  18     {
  19       dst[0] += A*src[0] + src[stride];
  20       dst[1] += A*src[1] + src[1+stride];
  21       dst[2] += A*src[2] + src[2+stride];
  22       dst[3] += A*src[3] + src[3+stride];
  23       dst[4] += A*src[4] + src[4+stride];
  24       dst[5] += A*src[5] + src[5+stride];
  25       dst[6] += A*src[6] + src[6+stride];
  26       dst[7] += A*src[7] + src[7+stride];
  27       dst += 8;
  28       src += 8;
  29       asm volatile ("" ::: "memory");
  30    }
  31 }
  32
  33
  34 int main (void)
  35 {
  36   int i;
  37
  38   check_vect ();
  39
  40   for (i = 0; i < N; i++)
  41     {
  42        dst[i] = 0;
  43        src[i] = i/8;
  44     }
  45
  46   foo (dst, src, N, 8);
  47
  48   for (i = 0; i < N/2; i++)
  49     {
  50       if (dst[i] != A * src[i] + src[i+8])
  51         abort ();
  52     }
  53
  54   return 0;
  55 }
  56
  57 /* { dg-final { scan-tree-dump-times "basic block vectorized" 1 "slp1" { target { vect64 && vect_hw_misalign } } } } */
  58