[llvm-dev] AA on intrinsics w/ side effects

[Hendrik Greving via llvm-dev]

Answering my own question: I think AliasAnalysis::getModRefInfo might do.

On Wed, Dec 9, 2020 at 10:27 AM Hendrik Greving <hgreving at google.com> wrote:

> Is there anything that can be used target specific to do AA for intrinsics
> w/ side effects but no specific memory pointer?
>
> e.g.
> instr_custom_A // implicitly only address space A
> instr_custom_B // implicitly only address space B
>
> Is there anything in any AA step except e.g. manually propagating
> alias.scope that would help disambiguating that they are disjoint (in
> llvm-ir)?
>
> The only idea I have is to add unused pointer arguments to the intrinsics
> for each memory space that are always null, combined w/ IntrArgMemOnly,
> maybe additionally handling it then w/ external AA.
>
> Thanks for help
>
>
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