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[Bug tree-optimization/38180] CCP does not propagate through constant initializers
- From: "rguenth at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 28 Mar 2009 12:52:30 -0000
- Subject: [Bug tree-optimization/38180] CCP does not propagate through constant initializers
- References: <bug-38180-10053@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #8 from rguenth at gcc dot gnu dot org 2009-03-28 12:52 -------
Subject: Bug 38180
Author: rguenth
Date: Sat Mar 28 12:52:13 2009
New Revision: 145184
URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=145184
Log:
2009-03-28 Richard Guenther <rguenther@suse.de>
PR tree-optimization/38180
* tree-ssa-ccp.c (get_default_value): Simplify.
(likely_value): Likewise.
(surely_varying_stmt_p): Properly handle VOP case.
(ccp_initialize): Likewise.
(ccp_fold): Handle propagating through *&.
(fold_const_aggregate_ref): Also handle decls.
* gcc.dg/tree-ssa/ssa-ccp-24.c: New testcase.
Added:
trunk/gcc/testsuite/gcc.dg/tree-ssa/ssa-ccp-24.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-ssa-ccp.c
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38180