gcc/testsuite/gcc.dg/vect/slp-perm-12.c

   1 /* { dg-require-effective-target vect_int } */
   2 /* { dg-require-effective-target vect_pack_trunc } */
   3 /* { dg-additional-options "-msse4" { target { i?86-*-* x86_64-*-* } } } */
   4
   5 #include "tree-vect.h"
   6
   7 extern void abort (void);
   8
   9 unsigned char a[64];
  10 short b[88];
  11
  12 void __attribute__((noinline))
  13 test(unsigned char * __restrict__ dst, short * __restrict__ tptr)
  14 {
  15   int i;
  16   for (i = 0; i < 8; i++)
  17     {
  18       dst[0] = (tptr[0] - tptr[0 + 3]);
  19       dst[1] = (tptr[1] - tptr[1 + 3]);
  20       dst[2] = (tptr[2] - tptr[2 + 3]);
  21       dst[3] = (tptr[3] - tptr[3 + 3]);
  22       dst[4] = (tptr[4] - tptr[4 + 3]);
  23       dst[5] = (tptr[5] - tptr[5 + 3]);
  24       dst[6] = (tptr[6] - tptr[6 + 3]);
  25       dst[7] = (tptr[7] - tptr[7 + 3]);
  26       dst += 8;
  27       tptr += 11;
  28     }
  29 }
  30
  31 int main()
  32 {
  33   int i;
  34
  35   check_vect ();
  36
  37   for (i = 0; i < 88; ++i)
  38     {
  39       b[i] = i;
  40       __asm__ volatile ("");
  41     }
  42
  43   test (a, b);
  44
  45   for (i = 0; i < 64; ++i)
  46     if (a[i] != 253)
  47       abort ();
  48
  49   return 0;
  50 }
  51
  52 /* { dg-final { scan-tree-dump-times "vectorizing stmts using SLP" 1 "vect" { target vect_perm } } } */