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From: "bergner at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/103623] [12 Regression] error: unable to generate
 reloads (ICE in curr_insn_transform, at lra-constraints.c:4132), or error:
 insn does not satisfy its constraints (ICE in extract_constrain_insn_cached,
 at recog.c:2682)
Date: Fri, 18 Feb 2022 19:58:00 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D103623

--- Comment #28 from Peter Bergner <bergner at gcc dot gnu.org> ---
(In reply to Segher Boessenkool from comment #27)
> OTOH, it makes no sense to test if we have hard float.  The pack and unpa=
ck
> builtins should work (and work the same) whenever long double is
> double-double.

Agreed.  For soft-float, the value would be a a GPR pair versus a FPR pair =
(for
-m64).  It's a little tricker for -m32 -msoft-float compiles, since a 128-b=
it
long double would live in 4 32-bit GPRs, so more regs than it takes to hold
them in FPRs.  Not much of a complication, but just needs to be tested on
32-bit to ensure it works as expected.=