[PATCH]Fix PR66556.

[PATCH]Fix PR66556.

[PATCH]Fix PR66556. Don't drop side-effect in
simplify_const_relational_operation function.

gcc/

2015-07-13  Renlin Li  <renlin.li@arm.com>

	PR rtl/66556
	* simplify-rtx.c (simplify_const_relational_operation): Add
	side_effects_p checks.

gcc/testsuite/

2015-07-13  Renlin Li  <renlin.li@arm.com>

	PR rtl/66556
	* gcc.c-torture/execute/pr66556.c: New.

From-SVN: r225729