Introduce InstanceKind::LlvmIntrinsic by bjorn3 · Pull Request #159183 · rust-lang/rust

bjorn3 · 2026-07-12T16:20:18Z

This way codegen backends don't have to check for a magic symbol name prefix to detect LLVM intrinsic calls and thus can more easily handle them separately as necessary.

rustbot · 2026-07-12T16:20:21Z

miri is developed in its own repository. If possible, consider making this change to rust-lang/miri instead.

cc @rust-lang/miri

Some changes occurred to MIR optimizations

cc @rust-lang/wg-mir-opt

Some changes occurred to the CTFE / Miri interpreter

cc @rust-lang/miri

Some changes occurred to the CTFE machinery

cc @RalfJung, @oli-obk, @lcnr

This PR changes rustc_public

cc @oli-obk, @celinval, @ouz-a, @makai410

rustbot · 2026-07-12T16:20:23Z

r? @folkertdev

rustbot has assigned @folkertdev.
They will have a look at your PR within the next two weeks and either review your PR or reassign to another reviewer.

Use r? to explicitly pick a reviewer

Why was this reviewer chosen?

The reviewer was selected based on:

Owners of files modified in this PR: compiler
compiler expanded to 75 candidates
Random selection from 18 candidates

RalfJung

r=me on the Miri changes

View changes since this review

RalfJung · 2026-07-13T14:01:23Z

Oh wait nvm there was the EmulateItemResult discussion.

bjorn3 · 2026-07-13T14:18:02Z

Ok if I squash the first four commits?

RalfJung

Now for real, r=me on the Miri parts. :)

And yeah fine for me to squash.

View changes since this review

This way codegen backends don't have to check for a magic symbol name prefix to detect LLVM intrinsic calls and thus can more easily handle them separately as necessary.

folkertdev · 2026-07-14T08:56:39Z

Nice!

@bors r=RalfJung,folkertdev

rust-bors · 2026-07-14T08:56:42Z

📌 Commit aec727f has been approved by RalfJung,folkertdev

It is now in the queue for this repository.

…RalfJung,folkertdev Introduce InstanceKind::LlvmIntrinsic This way codegen backends don't have to check for a magic symbol name prefix to detect LLVM intrinsic calls and thus can more easily handle them separately as necessary.

rustbot added S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue. labels Jul 12, 2026

rustbot assigned folkertdev Jul 12, 2026

bjorn3 force-pushed the instance_llvm_intrinsic branch from e14ca78 to b7990f6 Compare July 12, 2026 16:24

bjorn3 commented Jul 12, 2026

View reviewed changes

Comment thread src/tools/miri/src/intrinsics/mod.rs Outdated