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From: "mkretz at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/114966] fails to optimize avx2 in-register permute written with std::experimental::simd
Date: Tue, 07 May 2024 07:08:20 +0000 [thread overview]
Message-ID: <bug-114966-4-j4XGEyjT0E@http.gcc.gnu.org/bugzilla/> (raw)
In-Reply-To: <bug-114966-4@http.gcc.gnu.org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114966
Matthias Kretz (Vir) <mkretz at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |mkretz at gcc dot gnu.org
--- Comment #2 from Matthias Kretz (Vir) <mkretz at gcc dot gnu.org> ---
GCC trunk recognizes a list-init of the vector builtin as a VEC_PERM_EXPR.
That's what's behind the generator ctor of simd. So something goes wrong there.
I had a quick look through the tree passes on compiler-explorer, and on
forwprop3 GCC 13 matches the VEC_PERM_EXPR, while trunk doesn't
(https://godbolt.org/z/9Pef3c9d9)
next prev parent reply other threads:[~2024-05-07 7:08 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-05-07 2:57 [Bug tree-optimization/114966] New: " lee.imple at gmail dot com
2024-05-07 3:18 ` [Bug tree-optimization/114966] " lee.imple at gmail dot com
2024-05-07 7:08 ` mkretz at gcc dot gnu.org [this message]
2024-05-07 8:58 ` rguenth at gcc dot gnu.org
2024-05-07 10:28 ` mkretz at gcc dot gnu.org
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