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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/107043] range information not used in popcount
Date: Mon, 26 Sep 2022 20:27:17 +0000 [thread overview]
Message-ID: <bug-107043-4-zkrpYuvsfX@http.gcc.gnu.org/bugzilla/> (raw)
In-Reply-To: <bug-107043-4@http.gcc.gnu.org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107043
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2022-09-26
Ever confirmed|0 |1
Severity|normal |enhancement
--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Confirmed. The following two should be optimized too:
int g0(int n)
{
int n1 = n & 0x8000;
if (n1 == 0)
return 1;
// n1 will be 0x8000 here.
return (n1 >> 15) & 0x1;
}
int g1(int n)
{
int n1 = n & 0x8000;
if (n1 == 0)
return 1;
// n>>15 will be xxxxxx1 here.
return (n >> 15) & 0x1;
}
next prev parent reply other threads:[~2022-09-26 20:27 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-09-26 20:10 [Bug tree-optimization/107043] New: " drepper.fsp+rhbz at gmail dot com
2022-09-26 20:27 ` pinskia at gcc dot gnu.org [this message]
2022-09-27 10:19 ` [Bug tree-optimization/107043] " drepper.fsp+rhbz at gmail dot com
2022-09-27 14:29 ` aldyh at gcc dot gnu.org
2022-09-27 15:22 ` jakub at gcc dot gnu.org
2023-07-12 21:16 ` cvs-commit at gcc dot gnu.org
2023-07-12 21:19 ` aldyh at gcc dot gnu.org
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