r236117 - in /trunk/gcc: ChangeLog alias.c fold...

[rguenth@gcc.gnu.org]

Author: rguenth
Date: Wed May 11 10:24:11 2016
New Revision: 236117

URL: https://gcc.gnu.org/viewcvs?rev=236117&root=gcc&view=rev
Log:
2016-05-11  Richard Biener  <rguenther@suse.de>

	PR middle-end/71002
	* alias.c (reference_alias_ptr_type): Preserve alias-set zero
	if the langhook insists on it.
	* fold-const.c (make_bit_field_ref): Add arg for the original
	reference and preserve its alias-set.
	(decode_field_reference): Take exp by reference and adjust it
	to the original memory reference.
	(optimize_bit_field_compare): Adjust callers.
	(fold_truth_andor_1): Likewise.
	* gimplify.c (gimplify_expr): Adjust in-SSA form test.

	* g++.dg/torture/pr71002.C: New testcase.

Added:
    trunk/gcc/testsuite/g++.dg/torture/pr71002.C
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/alias.c
    trunk/gcc/fold-const.c
    trunk/gcc/gimplify.c
    trunk/gcc/testsuite/ChangeLog