[Bug target/94538] [10 Regression] ICE: in extract_constrain_insn_cached, at recog.c:2223 (insn does not satisfy its constraints) with -mcpu=cortex-m23 -mslow-flash-data

[wilco at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94538

--- Comment #13 from Wilco <wilco at gcc dot gnu.org> ---
(In reply to Christophe Lyon from comment #12)
> I've posted a patch to fix the regression for your f3() examples:
> https://gcc.gnu.org/pipermail/gcc-patches/2020-April/543993.html

Yes that improves some of the examples, but I still see regressions on m0 for
eg. -1 or 511. The splitter must have the right priority or it will continue to
cause regressions. That means placing it around line 790 after the existing
movsi splitters.