gcc/testsuite/gcc.dg/pr97750.c

   1 /* PR tree-optimization/97750 */
   2 /* { dg-do compile } */
   3 /* { dg-options "-O2 -Wall -Wextra" } */
   4 /* { dg-require-effective-target ptr_eq_long } */
   5
   6 char CopyPlane_src;
   7 long CopyPlane_copy_pitch;
   8 char *CopyFromUswc_src;
   9 int CopyFromUswc_height;
  10 void CopyPlane(char *dst) {
  11   __builtin_memcpy(dst, &CopyPlane_src, CopyPlane_copy_pitch);
  12 }
  13 void CopyFromUswc(long src_pitch) {
  14   char *dst;
  15   for (; CopyFromUswc_height;) {
  16     unsigned unaligned = (long)CopyFromUswc_src;
  17     if (unaligned)
  18       CopyPlane(&dst[unaligned]);
  19     CopyFromUswc_src += src_pitch;
  20   }
  21 }
  22 /* { dg-prune-output "-Wmaybe-uninitialized" } */