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From: "tschwinge at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/104345] [12 Regression] "nvptx: Transition nvptx backend
 to STORE_FLAG_VALUE = 1" patch made some code generation worse
Date: Tue, 08 Feb 2022 15:36:35 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D104345

--- Comment #9 from Thomas Schwinge <tschwinge at gcc dot gnu.org> ---
OK!  Putting your "nvptx: Add support for 64-bit mul.hi (and other)
instructions" on top, that considerably changes (simplifies!) the generated
'__muldc3' PTX code; the regression disappears.  :-)

(I have, so far, only manually tested
'libgomp.oacc-c-c++-common/reduction-cplx-dbl.c'.  I'll report later in the
unlikely case that any other/new issues should appear.)


(And, will later test your "nvptx: Tweak constraints on copysign instructio=
ns"
on top, too.)=