On Wed, 14 Nov 2018, Segher Boessenkool wrote: > Yeah, using local register vars to access global registers only works > by accident. It does work currently though, and people apparently use > it, so we shouldn't break it :-/
In the proposed approach (copying from/to pseudos just before/after the asm) we can emulate historic behavior by making uninitialized pseudos take values of the corresponding hardregs. If we decide that doing that just for must-uninit pseudos is enough, it's a simple extension to the existing init-regs pass. Does this sound reasonable? Alexander
