[Bug target/91683] ICE: SIGSEGV at -O when compiling for riscv64

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91683

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
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           Keywords|                            |GC
                 CC|                            |rguenth at gcc dot gnu.org,
                   |                            |segher at gcc dot gnu.org

--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Hmm, but shouldn't we instead fix combine to record not the reg rtx but the
regno for UNDO_MODE?  Because nothing prevents this from happening elsewhere
(even in combine itself?).