gcc/testsuite/gcc.dg/tree-ssa/scev-cast.c

   1 /* A test for various conversions of chrecs.  */
   2
   3 /* { dg-do compile { target i?86-*-* x86_64-*-* } } */
   4 /* { dg-options "-O2 -fdump-tree-optimized" } */
   5
   6 void blas (char xxx);
   7 void blau (unsigned char xxx);
   8
   9 void tst(void)
  10 {
  11   unsigned i;
  12
  13   for (i = 0; i < 128; i++) /* This cast to char has to be preserved.  */
  14     blas ((char) i);
  15   for (i = 0; i < 127; i++) /* And this one does not.  */
  16     blas ((char) i);
  17   for (i = 0; i < 255; i++) /* This cast is not necessary.  */
  18     blau ((unsigned char) i);
  19   for (i = 0; i < 256; i++)
  20     blau ((unsigned char) i); /* This one is necessary.  */
  21 }
  22
  23 /* { dg-final { scan-tree-dump-times "\\(int\\) \\(unsigned char\\)" 1 "optimized" } } */
  24 /* { dg-final { scan-tree-dump-times "\\(int\\) \\(char\\)" 1 "optimized" } } */
  25
  26 /* { dg-final { cleanup-tree-dump "optimized" } } */