From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 93542 invoked by alias); 6 May 2015 04:47:50 -0000 Mailing-List: contact gcc-bugs-help@gcc.gnu.org; run by ezmlm Precedence: bulk List-Id: List-Archive: List-Post: List-Help: Sender: gcc-bugs-owner@gcc.gnu.org Received: (qmail 93516 invoked by uid 48); 6 May 2015 04:47:47 -0000 From: "hp at gcc dot gnu.org" To: gcc-bugs@gcc.gnu.org Subject: [Bug ipa/66004] [6 Regression]: performance of 26_numerics/random/negative_binomial_distribution/operators/values.cc Date: Wed, 06 May 2015 04:47:00 -0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gcc X-Bugzilla-Component: ipa X-Bugzilla-Version: 6.0 X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: hp at gcc dot gnu.org X-Bugzilla-Status: UNCONFIRMED X-Bugzilla-Resolution: X-Bugzilla-Priority: P3 X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org X-Bugzilla-Target-Milestone: 6.0 X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: cc component Message-ID: In-Reply-To: References: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 7bit X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/ Auto-Submitted: auto-generated MIME-Version: 1.0 X-SW-Source: 2015-05/txt/msg00433.txt.bz2 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66004 Hans-Peter Nilsson changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |hubicka at gcc dot gnu.org Component|libstdc++ |ipa --- Comment #2 from Hans-Peter Nilsson --- Bisecting shows that revision r221859 is the culprit, adding Honza to CC. I hope to add analysis of the compiled code showing (an example of) the regressed code, but it would be really nice if Someone could performance-regression test r221859 (compared to r221858) on another target. Weird that a performance-regression of 16% is supposed to be *fixed* by that commit (see PR65076). While it refers to *compile-time* regression, that is just another name for a *run-time* performance-regression of the bootstrapped compiler, apparently typical for at least the execution-path when compiling tramp3d-v4.cpp supposedly for x86_64-linux and 26_numerics/random/negative_binomial_distribution/operators/values.cc for cris-elf. Note that the regression is not fixed for cris-elf at r222305 (a later additional commit referencing PR65076). Revision-numbers and cycle numbers while bisecting follows. Note the very stable numbers: r221618 34633750695 r221758 34633750695 r221828 34633750695 r221845 34633750695 r221854 34633750695 r221858 34633750695 r221859 40068917595 r221860 40068917595 r221863 40068917595 r221899 40068917595 r222180 40068917595 r222742 40111446541