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From: "ppalka at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug tree-optimization/66423] New: a % (1 << b) no longer gets folded to a & (1 << b) for unsigned a and b Date: Thu, 04 Jun 2015 22:24:00 -0000 [thread overview] Message-ID: <bug-66423-4@http.gcc.gnu.org/bugzilla/> (raw) https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66423 Bug ID: 66423 Summary: a % (1 << b) no longer gets folded to a & (1 << b) for unsigned a and b Product: gcc Version: 6.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: tree-optimization Assignee: unassigned at gcc dot gnu.org Reporter: ppalka at gcc dot gnu.org Target Milestone: --- Test case: unsigned int my_mod (unsigned int a, unsigned int b) { return a % (1 << b); } no longer gets folded to a & (1 << b). I have not done a bisection but it may be that r223690 is the cause.
next reply other threads:[~2015-06-04 22:24 UTC|newest] Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top 2015-06-04 22:24 ppalka at gcc dot gnu.org [this message] 2015-06-05 4:02 ` [Bug tree-optimization/66423] [6 Regression] a % (1 << b) no longer gets folded to a & (1 << b) for unsigned a glisse at gcc dot gnu.org 2015-06-08 10:48 ` rguenth at gcc dot gnu.org 2015-06-09 12:32 ` rguenth at gcc dot gnu.org
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