From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 48) id B9908382E812; Wed, 27 Jan 2021 22:15:12 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org B9908382E812 From: "segher at gcc dot gnu.org" To: gcc-bugs@gcc.gnu.org Subject: [Bug rtl-optimization/80960] [8/9/10/11 Regression] Huge memory use when compiling a very large test case Date: Wed, 27 Jan 2021 22:15:12 +0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gcc X-Bugzilla-Component: rtl-optimization X-Bugzilla-Version: 6.3.0 X-Bugzilla-Keywords: memory-hog X-Bugzilla-Severity: normal X-Bugzilla-Who: segher at gcc dot gnu.org X-Bugzilla-Status: ASSIGNED X-Bugzilla-Resolution: X-Bugzilla-Priority: P2 X-Bugzilla-Assigned-To: rguenth at gcc dot gnu.org X-Bugzilla-Target-Milestone: 8.5 X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: Message-ID: In-Reply-To: References: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/ Auto-Submitted: auto-generated MIME-Version: 1.0 X-BeenThere: gcc-bugs@gcc.gnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Gcc-bugs mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 27 Jan 2021 22:15:12 -0000 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D80960 --- Comment #26 from Segher Boessenkool --- (In reply to Richard Biener from comment #23) > (that combine number prevails on trunk as well, I can't spot any code > that disables combine on large BBs so not sure what goes on here) There is no such thing, indeed. And the instruction combiner is "mostly linear", so it shouldn't actually matter.=