gcc/testsuite/c-c++-common/pr95903.c

   1 /* PR middle-end/95903 */
   2 /* { dg-do compile { target lp64 } } */
   3 /* { dg-options "-O2 -fwrapv -fdump-tree-optimized" } */
   4 /* Verify that for -fwrapv the + 1 addition is performed in the parameter's
   5    type before sign extending it.  */
   6 /* { dg-final { scan-tree-dump-times "off_\[0-9]+\\\(D\\\) \\+ 1" 2 "optimized" } } */
   7
   8 char
   9 foo (const char *ptr, int off)
  10 {
  11   off += 1;
  12   return ptr[off];
  13 }
  14
  15 char
  16 bar (const char *ptr, int off)
  17 {
  18   return ptr[off + 1];
  19 }