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From: "cvs-commit at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/78103] Failure to optimize with __builtin_clzl
Date: Sun, 01 Aug 2021 20:33:13 +0000 [thread overview]
Message-ID: <bug-78103-4-UIdR2lpORn@http.gcc.gnu.org/bugzilla/> (raw)
In-Reply-To: <bug-78103-4@http.gcc.gnu.org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78103
--- Comment #24 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by H.J. Lu <hjl@gcc.gnu.org>:
https://gcc.gnu.org/g:6f0c43e97825ee54e3779afbedcd0def12443001
commit r12-2656-g6f0c43e97825ee54e3779afbedcd0def12443001
Author: H.J. Lu <hjl.tools@gmail.com>
Date: Sun Aug 1 09:55:33 2021 -0700
i386: Improve SImode constant - __builtin_clzll for -mno-lzcnt
Add a zero_extend patten for bsr_rex64_1 and use it to split SImode
constant - __builtin_clzll to avoid unncessary zero_extend.
gcc/
PR target/78103
* config/i386/i386.md (bsr_rex64_1_zext): New.
(combine splitter for constant - clzll): Replace gen_bsr_rex64_1
with gen_bsr_rex64_1_zext.
gcc/testsuite/
PR target/78103
* gcc.target/i386/pr78103-2.c: Also scan incl.
* gcc.target/i386/pr78103-3.c: Scan leal|addl|incl for x32. Also
scan incq.
prev parent reply other threads:[~2021-08-01 20:33 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <bug-78103-4@http.gcc.gnu.org/bugzilla/>
2021-07-24 6:20 ` pinskia at gcc dot gnu.org
2021-07-24 12:28 ` jakub at gcc dot gnu.org
2021-07-26 10:57 ` jakub at gcc dot gnu.org
2021-07-26 11:14 ` jakub at gcc dot gnu.org
2021-07-26 11:22 ` jakub at gcc dot gnu.org
2021-07-26 12:11 ` jakub at gcc dot gnu.org
2021-07-26 21:01 ` segher at gcc dot gnu.org
2021-07-26 21:08 ` jakub at gcc dot gnu.org
2021-07-26 21:26 ` segher at gcc dot gnu.org
2021-07-27 8:52 ` jakub at gcc dot gnu.org
2021-07-27 12:35 ` segher at gcc dot gnu.org
2021-07-27 12:41 ` jakub at gcc dot gnu.org
2021-07-27 13:53 ` jakub at gcc dot gnu.org
2021-07-27 15:25 ` segher at gcc dot gnu.org
2021-07-27 15:37 ` segher at gcc dot gnu.org
2021-07-31 7:21 ` cvs-commit at gcc dot gnu.org
2021-07-31 8:24 ` jakub at gcc dot gnu.org
2021-08-01 20:33 ` cvs-commit at gcc dot gnu.org [this message]
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