gcc-4_9/gcc/testsuite/gcc.dg/vect/pr52252-ld.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O2 -g -ftree-vectorize -mssse3 -fdump-tree-vect-details" { target { i?86-*-* x86_64-*-* } } } */
   3
   4 #define byte unsigned char
   5
   6 void
   7 matrix_mul (byte *in, byte *out, int size)
   8 {
   9   int i;
  10   for (i = 0; i < size; i++)
  11     {
  12       byte in0 = in[0];
  13       byte in1 = in[1];
  14       byte in2 = in[2];
  15       byte out0, out1, out2, out3;
  16       out0 = in0 + in1;
  17       out1 = in0 + in2;
  18       out2 = in1 + in2;
  19       out3 = in0 + in1 + in2;
  20       out[0] = out0;
  21       out[1] = out1;
  22       out[2] = out2;
  23       out[3] = out3;
  24       in += 3;
  25       out += 4;
  26     }
  27 }
  28
  29 /* { dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect" } } */
  30 /* { dg-final { cleanup-tree-dump "vect" } } */