gcc/testsuite/gcc.dg/tree-ssa/loop-24.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O -fstrict-overflow -fdump-tree-empty" } */
   3
   4 void foo(int a, int b)
   5 { for(;a!=b;a+=4); }
   6
   7 void foo2(int a, int b)
   8 { for(;a<b;a+=4); }
   9
  10 void foo3(int*a, int* b)
  11 { for(;a<b;a++); }
  12
  13 void foo4(int*a, int*b)
  14 { for(;a!=b;a++); }
  15
  16 /* { dg-final { scan-tree-dump-times "Removing empty loop" 4 "empty" } } */
  17 /* { dg-final { cleanup-tree-dump "empty" } } */