From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 48) id 72C06385AC3D; Thu, 6 Jan 2022 10:06:44 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 72C06385AC3D From: "guojiufu at gcc dot gnu.org" To: gcc-bugs@gcc.gnu.org Subject: [Bug rtl-optimization/63281] powerpc64le creates 64 bit constants from scratch instead of loading them Date: Thu, 06 Jan 2022 10:06:44 +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: 5.0 X-Bugzilla-Keywords: missed-optimization X-Bugzilla-Severity: enhancement X-Bugzilla-Who: guojiufu at gcc dot gnu.org X-Bugzilla-Status: NEW X-Bugzilla-Resolution: X-Bugzilla-Priority: P3 X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org X-Bugzilla-Target-Milestone: --- 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: Thu, 06 Jan 2022 10:06:44 -0000 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D63281 --- Comment #21 from Jiu Fu Guo --- Also had a test on powerpc, -m32. As testing, it seems no significant bene= fit loading from 'rodata' vs. building constants by instructions. lis %r7,0x410 ori %r7,%r7,0x103c lis %r6,0x710 ori %r6,%r6,0xe005 lis %r12,.LC3@ha la %r12,.LC3@l(%r12) lwz %r3,0(%r12) lwz %r4,4(%r12)=