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 (signed char xxx);
   7 void blau (unsigned char xxx);
   8
   9 void tst(void)
  10 {
  11   unsigned i;
  12
  13   for (i = 0; i < 129; i++) /* This truncation to char has to be preserved.  */
  14     blas ((signed char) i);
  15   for (i = 0; i < 128; i++) /* This one is not necessary, VRP eliminates it.  */
  16     blas ((signed char) i);
  17   for (i = 0; i < 127; i++) /* This one is not necessary, IVOPTS eliminates it.  */
  18     blas ((signed char) i);
  19   for (i = 0; i < 256; i++) /* This one is not necessary, VRP eliminates it.  */
  20     blau ((unsigned char) i);
  21   for (i = 0; i < 257; i++) /* This one is necessary.  */
  22     blau ((unsigned char) i);
  23 }
  24
  25 /* { dg-final { scan-tree-dump-times "& 255" 1 "optimized" } } */
  26 /* { dg-final { scan-tree-dump-times "= \\(signed char\\)" 1 "optimized" } } */
  27