gcc/testsuite/gcc.dg/tree-ssa/cmpbit-7.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O2 -fdump-tree-forwprop1" } */
   3 /* PR tree-optimization/106164 */
   4 /* PR tree-optimization/111456 */
   5
   6 _Bool f(int a)
   7 {
   8         _Bool t = a == 3;
   9         unsigned t1 = a;
  10         _Bool t2 = t1 >= 3;
  11         return t | t2;
  12 }
  13
  14 /* Should be able to optimize down to just `a > 2` during forwprop1 */
  15 /* { dg-final { scan-tree-dump-not "a_\[0-9\]+.D. == 3" "forwprop1" } } */
  16
  17 _Bool f1(int b)
  18 {
  19         _Bool t = b == 3;
  20         short t1 = b;
  21         _Bool t2 = t1 >= 3;
  22         return t | t2;
  23 }
  24
  25 /* Should be able to optimize down to just `a > 2` during forwprop1 as `((short)a) >= 3` is
  26    true already when `a == 3`. */
  27 /* { dg-final { scan-tree-dump-not "b_\[0-9\]+.D. == 3" "forwprop1" } } */
  28 /* { dg-final { scan-tree-dump-times "_\[0-9\]+ > 2" 2 "forwprop1" } } */