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[Bug tree-optimization/66423] [6 Regression] a % (1 << b) no longer gets folded to a & (1 << b) for unsigned a
- From: "glisse at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Fri, 05 Jun 2015 04:02:40 +0000
- Subject: [Bug tree-optimization/66423] [6 Regression] a % (1 << b) no longer gets folded to a & (1 << b) for unsigned a
- Auto-submitted: auto-generated
- References: <bug-66423-4 at http dot gcc dot gnu dot org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66423
Marc Glisse <glisse at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2015-06-05
Target Milestone|--- |6.0
Summary|a % (1 << b) no longer gets |[6 Regression] a % (1 << b)
|folded to a & (1 << b) for |no longer gets folded to a
|unsigned a and b |& (1 << b) for unsigned a
Ever confirmed|0 |1
--- Comment #1 from Marc Glisse <glisse at gcc dot gnu.org> ---
a % (unsigned int) (1 << b)
The pattern in match.pd seems to be missing a 'convert' case.