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From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/86723] not optimizing with bswap, that casts to int aftwards
Date: Thu, 19 Aug 2021 18:42:49 +0000 [thread overview]
Message-ID: <bug-86723-4-oF6SH6w4K4@http.gcc.gnu.org/bugzilla/> (raw)
In-Reply-To: <bug-86723-4@http.gcc.gnu.org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86723
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Last reconfirmed|2018-07-29 00:00:00 |2021-8-19
--- Comment #4 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
clang:
movabsq $72057589742960640, %rax # imm = 0xFFFFFF00000000
andq %rdi, %rax
bswapq %rax
shrq $56, %rdi
orl %edi, %eax
ICC:
bswap %rdi #11.51
movl %edi, %eax #11.51
ret
ICC looks like it is able to do it correctly.
next parent reply other threads:[~2021-08-19 18:42 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <bug-86723-4@http.gcc.gnu.org/bugzilla/>
2021-08-19 18:42 ` pinskia at gcc dot gnu.org [this message]
2021-08-19 19:20 ` jakub at gcc dot gnu.org
2021-08-20 15:38 ` jakub at gcc dot gnu.org
2021-08-23 9:54 ` cvs-commit at gcc dot gnu.org
2021-08-23 9:54 ` jakub at gcc dot gnu.org
2021-08-25 2:35 ` pinskia at gcc dot gnu.org
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