gcc/testsuite/gcc.dg/tree-ssa/overflow-1.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O -fdump-tree-optimized" } */
   3
   4 #if __SIZEOF_INT__ < 4
   5   __extension__ typedef __UINT32_TYPE__ uint32_t;
   6 #else
   7   typedef unsigned uint32_t;
   8 #endif
   9
  10 int f(uint32_t a){
  11     uint32_t b=5;
  12     uint32_t c=a-b;
  13     return c>a;
  14 }
  15 int g(uint32_t a){
  16     uint32_t b=32;
  17     uint32_t c=a+b;
  18     return c<a;
  19 }
  20
  21 /* { dg-final { scan-tree-dump "a_\[0-9\]+.D. <= 4;" "optimized" } } */
  22 /* { dg-final { scan-tree-dump "a_\[0-9\]+.D. > 4294967263;" "optimized" } } */