gcc/testsuite/gcc.dg/tree-ssa/loop-24.c - gcc - Git at Google

 /* { dg-do compile } */
 /* { dg-options "-O2 -fstrict-overflow -fdump-tree-optimized" } */

 void foo(int a, int b)
 { for(;a!=b;a+=4); }

 void foo2(int a, int b)
 { for(;a<b;a+=4); }

 void foo3(int*a, int* b)
 { for(;a<b;a++); }

 void foo4(int*a, int*b)
 { for(;a!=b;a++); }

 /* { dg-final { scan-tree-dump-not "if" "optimized" } } */
	/* { dg-do compile } */
	/* { dg-options "-O2 -fstrict-overflow -fdump-tree-optimized" } */

	void foo(int a, int b)
	{ for(;a!=b;a+=4); }

	void foo2(int a, int b)
	{ for(;a<b;a+=4); }

	void foo3(inta, int b)
	{ for(;a<b;a++); }

	void foo4(inta, intb)
	{ for(;a!=b;a++); }

	/* { dg-final { scan-tree-dump-not "if" "optimized" } } */