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From: "ubizjak at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/105778] Shift by register --- unnecessary AND instruction
Date: Tue, 31 May 2022 18:53:36 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D105778

--- Comment #6 from Uro=C5=A1 Bizjak <ubizjak at gmail dot com> ---
(In reply to Jakub Jelinek from comment #4)
> It is the same thing done a few lines later in the preexisting code too.
> Shall I all of those change to gen_lowpart (QImode, force_reg (GET_MODE
> (operands[2]), operands[2])) then?

Yes, please. A "register_operand" predicate accepts SUBREGs of some strange
mode (usually FP mode) registers, and gen_lowpart chokes on these.=