gcc/testsuite/gcc.dg/torture/pr56157.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-ftree-vectorize" } */
   3
   4 struct Pixel {
   5     unsigned short r;
   6     unsigned short g;
   7     unsigned short b;
   8     unsigned short a;
   9 };
  10
  11 void fn(unsigned char * __restrict dst, const unsigned char * __restrict src)
  12 {
  13   unsigned x;
  14   for(x = 0; x < 1024; x += 1)
  15     {
  16       struct Pixel pixel;
  17       pixel.r = (unsigned short)(((unsigned)src[0]) * 0xffff / 0xff);
  18       pixel.g = (unsigned short)(((unsigned)src[1]) * 0xffff / 0xff);
  19       pixel.b = (unsigned short)(((unsigned)src[2]) * 0xffff / 0xff);
  20       pixel.a = (unsigned short)(((unsigned)src[3]) * 0xffff / 0xff);
  21       __builtin_memcpy(dst, &pixel, sizeof pixel);
  22       src += 4;
  23       dst += 8;
  24     }
  25 }