This is the mail archive of the
gcc-bugs@gcc.gnu.org
mailing list for the GCC project.
[Bug tree-optimization/66299] more optimize opportunity
- From: "mpolacek at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Tue, 09 Jun 2015 14:24:38 +0000
- Subject: [Bug tree-optimization/66299] more optimize opportunity
- Auto-submitted: auto-generated
- References: <bug-66299-4 at http dot gcc dot gnu dot org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66299
--- Comment #5 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Author: mpolacek
Date: Tue Jun 9 14:24:04 2015
New Revision: 224283
URL: https://gcc.gnu.org/viewcvs?rev=224283&root=gcc&view=rev
Log:
PR tree-optimization/66299
* match.pd ((CST1 << A) == CST2 -> A == ctz (CST2) - ctz (CST1)
((CST1 << A) != CST2 -> A != ctz (CST2) - ctz (CST1)): New
patterns.
* gcc.dg/pr66299-1.c: New test.
* gcc.dg/pr66299-2.c: New test.
* gcc.dg/pr66299-3.c: New test.
Added:
trunk/gcc/testsuite/gcc.dg/pr66299-1.c
trunk/gcc/testsuite/gcc.dg/pr66299-2.c
trunk/gcc/testsuite/gcc.dg/pr66299-3.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/match.pd
trunk/gcc/testsuite/ChangeLog