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From: "slyfox at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/115403] [15 Regression]  highway build from git fails with
 'target specific option mismatch' since r15-902-geff00046409a72
Date: Sun, 09 Jun 2024 08:59:33 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D115403

--- Comment #1 from Sergei Trofimovich <slyfox at gcc dot gnu.org> ---
Created attachment 58388
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=3D58388&action=3Dedit
float_test.cc.cc.xz

Attaching preprocessed file. It fails as:

$ g++ -O2 -std=3Dc++17 -c float_test.cc.cc
float_test.cc.cc: In function 'constexpr bool hwy::ScalarIsInf(T) [with T =
=3D
float16_t]':
float_test.cc.cc:15617:108: error: inlining failed in call to 'always_inlin=
e'
'constexpr To hwy::BitCastScalar(const From&) [with To =3D short unsigned i=
nt;
>From =3D float16_t; EnableIf<((bool)(! IsSpecialFloat<To>()))>* <anonymous>=
 =3D
0]': target specific option mismatch
15617 | ine)) __attribute__((flatten)) __attribute__((unused)) constexpr To
BitCastScalar(const From& val) {
      |=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=
=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=
=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20
^~~~~~~~~~~~~
float_test.cc.cc:16478:43: note: called from here
16478 |   return static_cast<TU>(BitCastScalar<TU>(static_cast<TF>(val)) <<=
 1)
=3D=3D
      |                          ~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~=