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From: "linux at carewolf dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/67351] New: Missed optimisation on 64-bit field compared to 32-bit
Date: Tue, 25 Aug 2015 15:38:00 -0000 [thread overview]
Message-ID: <bug-67351-4@http.gcc.gnu.org/bugzilla/> (raw)
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67351
Bug ID: 67351
Summary: Missed optimisation on 64-bit field compared to 32-bit
Product: gcc
Version: 5.2.1
Status: UNCONFIRMED
Severity: enhancement
Priority: P3
Component: middle-end
Assignee: unassigned at gcc dot gnu.org
Reporter: linux at carewolf dot com
Target Milestone: ---
Created attachment 36253
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=36253&action=edit
Test
Gcc will expand and detect field setting on 32-bit integers, but for some
reason miss the opportunity on 64-bit.
This was discovered as gcc was inexplicably slower compared to clang on the
64-bit case but not when using 32bit.
next reply other threads:[~2015-08-25 15:38 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-08-25 15:38 linux at carewolf dot com [this message]
2015-08-25 15:39 ` [Bug middle-end/67351] " linux at carewolf dot com
2015-08-25 16:37 ` [Bug target/67351] " ubizjak at gmail dot com
2015-08-26 6:57 ` rguenth at gcc dot gnu.org
2015-09-01 9:00 ` [Bug tree-optimization/67351] " hs.naveen2u at gmail dot com
2015-09-03 10:20 ` naveenh at gcc dot gnu.org
2015-09-17 11:13 ` linux at carewolf dot com
2015-09-17 11:45 ` ubizjak at gmail dot com
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