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From: "crazylht at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug middle-end/102133] [12 Regression] ICE in set_rtl building
 libgcc __muldc3 for 32-bit SPARC
Date: Tue, 31 Aug 2021 02:16:17 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D102133

--- Comment #4 from Hongtao.liu <crazylht at gmail dot com> ---

>=20
> and it hit REG_P (XEXP (x, 1)), XEXP (x, 1) is invalid for subreg, so
> set_rtl  here doesn't accept subreg?

typo, it hit gcc_assert that if X is not REG, it must be CONCAT or PARALLEL,
but here is SUBREG, so gcc_assert failed.=