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[Bug tree-optimization/45397] [5/6 Regression] Issues with integer narrowing conversions
- From: "rguenth at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Mon, 27 Feb 2017 08:52:00 +0000
- Subject: [Bug tree-optimization/45397] [5/6 Regression] Issues with integer narrowing conversions
- Auto-submitted: auto-generated
- References: <bug-45397-4@http.gcc.gnu.org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=45397
--- Comment #31 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Mon Feb 27 08:51:28 2017
New Revision: 245752
URL: https://gcc.gnu.org/viewcvs?rev=245752&root=gcc&view=rev
Log:
2017-02-27 Richard Biener <rguenther@suse.de>
PR tree-optimization/45397
* tree-ssa-pre.c (eliminate_insert): Handle BIT_AND_EXPR.
* tree-ssa-sccvn.c (valueized_wider_op): New helper.
(visit_nary_op): Add pattern matching for CSEing sign-changed
or truncated operations with wider ones.
* gcc.dg/tree-ssa/pr45397.c: New testcase.
Added:
trunk/gcc/testsuite/gcc.dg/tree-ssa/pr45397.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-ssa-pre.c
trunk/gcc/tree-ssa-sccvn.c