[Bug target/84710] [8 Regression] ICE: RTL check: expected code 'reg', have 'subreg' in rhs_regno, at rtl.h:1896 with -O -fno-forward-propagate

[segher at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84710

--- Comment #4 from Segher Boessenkool <segher at gcc dot gnu.org> ---
The testcase does not crash for me; does it need more non-default options?

The testcase has UB of course (d is undefined).