On Tue, Mar 11, 2025 at 10:18:18AM +0100, Richard Biener wrote:
> I think the patch as-is is more robust, but still - ugh ... I wonder
> whether we can instead avoid introducing the COMPLEX_EXPR at all
> at -O0?
Can we set DECL_NOT_GIMPLE_REG_P at -O0 during gimplification (where
we've already handled some uses/setters of it), at least when
gimplify_modify_expr_complex_part sees {REAL,IMAG}PART_EXPR on
{VAR,PARM,RESULT}_DECL?
Or would we need to basically revert to the old way (for -O0 only) where
we assumed all complex vars aren't gimple regs unless proven otherwise
(not assume it for getting initialized internal vars of course)?
Jakub
