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[Bug rtl-optimization/78546] [6 Regression] wrong code at -O2 and above
- 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: Tue, 29 Nov 2016 07:49:21 +0000
- Subject: [Bug rtl-optimization/78546] [6 Regression] wrong code at -O2 and above
- Auto-submitted: auto-generated
- References: <bug-78546-4@http.gcc.gnu.org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78546
--- Comment #18 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Tue Nov 29 07:48:43 2016
New Revision: 242953
URL: https://gcc.gnu.org/viewcvs?rev=242953&root=gcc&view=rev
Log:
2016-11-29 Richard Biener <rguenther@suse.de>
PR middle-end/78546
* match.pd: Add CST1 - (CST2 - A) -> CST3 + A missing case.
* gcc.dg/tree-ssa/forwprop-36.c: New testcase.
Added:
trunk/gcc/testsuite/gcc.dg/tree-ssa/forwprop-36.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/match.pd
trunk/gcc/testsuite/ChangeLog