r218019 - in /trunk/gcc: ChangeLog gimple-fold....

[rguenth@gcc.gnu.org]

Author: rguenth
Date: Mon Nov 24 14:07:18 2014
New Revision: 218019

URL: https://gcc.gnu.org/viewcvs?rev=218019&root=gcc&view=rev
Log:
2014-11-24  Richard Biener  <rguenther@suse.de>

	PR tree-optimization/63679
	* tree-ssa-sccvn.c: Include ipa-ref.h, plugin-api.h and cgraph.h.
	(copy_reference_ops_from_ref): Fix non-constant ADDR_EXPR case
	to properly leave off at -1.
	(fully_constant_vn_reference_p): Generalize folding from
	constant initializers.
	(vn_reference_lookup_3): When looking through aggregate copies
	handle offsetted reads and try simplifying the result to
	a constant.
	* gimple-fold.h (fold_ctor_reference): Export.
	* gimple-fold.c (fold_ctor_reference): Likewise.

	* gcc.dg/tree-ssa/ssa-fre-42.c: New testcase.
	* gcc.dg/tree-ssa/20030807-5.c: Avoid folding read from global to zero.
	* gcc.target/i386/ssetype-1.c: Likewise.
	* gcc.target/i386/ssetype-3.c: Likewise.
	* gcc.target/i386/ssetype-5.c: Likewise.

Added:
    trunk/gcc/testsuite/gcc.dg/tree-ssa/ssa-fre-42.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/gimple-fold.c
    trunk/gcc/gimple-fold.h
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/testsuite/gcc.dg/tree-ssa/20030807-5.c
    trunk/gcc/testsuite/gcc.target/i386/ssetype-1.c
    trunk/gcc/testsuite/gcc.target/i386/ssetype-3.c
    trunk/gcc/testsuite/gcc.target/i386/ssetype-5.c
    trunk/gcc/tree-ssa-sccvn.c