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From: "roger at nextmovesoftware dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/105034] [10/11/12 regression]Suboptimal codegen for
 min/max with -Os
Date: Thu, 14 Apr 2022 09:20:09 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D105034

--- Comment #5 from Roger Sayle <roger at nextmovesoftware dot com> ---
The latest CSiBE results on x86_64-pc-linux-gnu:  With -Os the total size is
3696263, and with -Os -mno-stv the total size is 3966887, i.e. 624 bytes
larger.  The worst regression from -mno-stv is
teem-1.6.0-src/src/nrrd/parseNrrd which 402 bytes larger, and the best
improvement from -mno-stv is linux-2.4.23-pre3-testplatform/net/ipv4/route
which is 134 bytes smaller.  So I think this is a fine tuning problem.

cmp/cmov is much shorter than a pmax or a pmin, so SImode MAX/MIN should ha=
ve
negative gain with -Os.  Likewise for const0_rtx.=