Re: [PATCH] tailc, v2: Virtually undo IPA-VRP return value optimization for tail calls [PR118430]

[Jakub Jelinek]

On Wed, Jan 15, 2025 at 11:46:28AM +0100, Jakub Jelinek wrote:
> BTW, I think we don't optimize returns-arg stuff like that at least right
> now, and if we did, it wouldn't be through IPA-VRP, most of the returns-arg
> functions actually return a pointer, not integer and for prange we just
> track constant values, not say address of something.

I think for RA, perhaps we could add a REG_EQUIV note to the call insns
which return singleton value range and let CSE etc. deal with that.

        Jakub