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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 13:44:27 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D105778

--- Comment #3 from Uro=C5=A1 Bizjak <ubizjak at gmail dot com> ---
Comment on attachment 53058
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=3D53058
gcc13-pr105778.patch

>+      operands[2] =3D gen_lowpart (QImode, operands[2]);

We have learned that pre-reload splits need to move operand to a register
before calling gen_lowpart.

>+      emit_insn (gen_ashl<dwi>3_doubleword (operands[0], operands[1],
>+					    operands[2]));
>+      DONE;=