gcc/testsuite/gcc.dg/tree-ssa/vrp19.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-fwrapv -O1 -ftree-vrp -fdisable-tree-evrp -fdump-tree-vrp1 -fdisable-tree-ethread -fdisable-tree-thread1" } */
   3
   4 #include <limits.h>
   5 extern void abort ();
   6 extern void exit (int);
   7
   8 int f (int a) {
   9         if (a != INT_MIN) {
  10                 a = a > 0 ? a : -a;
  11                 if (a < 0)
  12                   return 1;
  13         }
  14         return 0;
  15 }
  16
  17 int g (int b) {
  18         if (b != INT_MIN) {
  19                 b = b > 0 ? b : -b;
  20                 if (b >= 0)
  21                   return 0;
  22         }
  23         return 1;
  24 }
  25 /* { dg-final { scan-tree-dump "Folding predicate a_. < 0 to 0" "vrp1" } } */
  26 /* { dg-final { scan-tree-dump "Folding predicate b_. >= 0 to 1" "vrp1" } } */