[Bug rtl-optimization/71150] [7 Regression] ICE on valid code at -O1 and above in 64-bit mode on x86_64-linux-gnu in lra_eliminate_reg_if_possible, at lra-eliminations.c:1402

[jiwang at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71150

Jiong Wang <jiwang at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Target|                            |i386*
             Status|NEW                         |ASSIGNED

--- Comment #2 from Jiong Wang <jiwang at gcc dot gnu.org> ---
r236181 was assuming SUBREG_REG (x) is a REG, but actually it might be not, at
least for i386. A simple new guard of REG_P check can fix this regression.

Will explore more to see what's the best fix and propose a patch shortly.