gcc/testsuite/gcc.target/i386/pr55342.c

   1 /* PR rtl-optimization/55342 */
   2 /* { dg-do compile } */
   3 /* { dg-options "-O2" } */
   4 /* { dg-final { scan-assembler-not "notb" } } */
   5
   6
   7 void convert_image(unsigned char *in, unsigned char *out, int size) {
   8     int i;
   9     unsigned char * read = in,
  10      * write = out;
  11     for(i = 0; i < size; i++) {
  12         unsigned char r = *read++;
  13         unsigned char g = *read++;
  14         unsigned char b = *read++;
  15         unsigned char c, m, y, k, tmp;
  16         c = 255 - r;
  17         m = 255 - g;
  18         y = 255 - b;
  19         if (c < m)
  20           k = ((c) > (y)?(y):(c));
  21         else
  22           k = ((m) > (y)?(y):(m));
  23         *write++ = c - k;
  24         *write++ = m - k;
  25         *write++ = y - k;
  26         *write++ = k;
  27     }
  28 }