r242075 - in /trunk/gcc: ChangeLog gimple-ssa-i...

[law@gcc.gnu.org]

Author: law
Date: Fri Nov 11 16:00:47 2016
New Revision: 242075

URL: https://gcc.gnu.org/viewcvs?rev=242075&root=gcc&view=rev
Log:
	* gimple-ssa-isolate-paths.c (is_divmod_with_given_divisor): New
	function.
	(stmt_uses_name_in_undefined_way): New function, extracted from
	find_implicit_erroneous_behavior and extended for div/mod case.
	(stmt_uses_0_or_null_in_undefined_way): New function, extracted from
	find_explicit_erroneous_behavior and extended for div/mod case.
	(find_implicit_erroneous_behavior): Use new helper function.
	(find_explicit_erroneous_behavior): Use new helper function.

	* gcc.dg/tree-ssa/isolate-6.c: New test.
	* gcc.dg/tree-ssa/isolate-7.c: New test.

Added:
    trunk/gcc/testsuite/gcc.dg/tree-ssa/isolate-6.c
    trunk/gcc/testsuite/gcc.dg/tree-ssa/isolate-7.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/gimple-ssa-isolate-paths.c
    trunk/gcc/testsuite/ChangeLog