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

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RalfJung

r=me on the Miri changes

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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.

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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.

…uwer Rollup of 22 pull requests Successful merges: - #156047 (Fix trait method resolution on an adjusted never type) - #157824 (Comptime inherent impls) - #158235 (Store `DefId` instead of `EiiDecl` in `EiiImplResolution::Known`) - #158723 (Support EII on Windows MSVC) - #158993 (rerun in original typing mode if we meet any opaques in post analysis) - #159160 (Make `HasTokens` a sub-trait of `HasAttrs`.) - #159183 (Introduce InstanceKind::LlvmIntrinsic) - #159251 (Bump rustc-perf submodule) - #155013 (Suggest the `[const] Destruct` bound for type parameters in const functions when missing) - #159155 (unstable book: Document `diagnostic_on_unknown` feature) - #159235 (Add regression test for #95719) - #159243 (inline Once wait and wait_force) - #159255 (Replace shortened type with `_` instead of `...` as placeholder) - #159259 (Add regression test for #144033) - #159265 (bootstrap: skip intrinsic-test when rustfmt is unavailable) - #159269 (disable range-len-try-from.rs on s390x) - #159272 (slice: make swap delegate to swap_unchecked) - #159274 (bootstrap: Rename `std_crates_for_run_make` to `std_crates_for_make_run`) - #159275 (remove obsolete comment) - #159277 (Construct `tokens` for attrs made by `mk_attr_word` and other variants) - #159283 (Remove obsolete verbose flag from deref/ref suggestions) - #159290 (rustc-dev-guide subtree update)

Rollup merge of #159183 - bjorn3:instance_llvm_intrinsic, r=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.

…uwer Rollup of 22 pull requests Successful merges: - rust-lang/rust#156047 (Fix trait method resolution on an adjusted never type) - rust-lang/rust#157824 (Comptime inherent impls) - rust-lang/rust#158235 (Store `DefId` instead of `EiiDecl` in `EiiImplResolution::Known`) - rust-lang/rust#158723 (Support EII on Windows MSVC) - rust-lang/rust#158993 (rerun in original typing mode if we meet any opaques in post analysis) - rust-lang/rust#159160 (Make `HasTokens` a sub-trait of `HasAttrs`.) - rust-lang/rust#159183 (Introduce InstanceKind::LlvmIntrinsic) - rust-lang/rust#159251 (Bump rustc-perf submodule) - rust-lang/rust#155013 (Suggest the `[const] Destruct` bound for type parameters in const functions when missing) - rust-lang/rust#159155 (unstable book: Document `diagnostic_on_unknown` feature) - rust-lang/rust#159235 (Add regression test for rust-lang/rust#95719) - rust-lang/rust#159243 (inline Once wait and wait_force) - rust-lang/rust#159255 (Replace shortened type with `_` instead of `...` as placeholder) - rust-lang/rust#159259 (Add regression test for rust-lang/rust#144033) - rust-lang/rust#159265 (bootstrap: skip intrinsic-test when rustfmt is unavailable) - rust-lang/rust#159269 (disable range-len-try-from.rs on s390x) - rust-lang/rust#159272 (slice: make swap delegate to swap_unchecked) - rust-lang/rust#159274 (bootstrap: Rename `std_crates_for_run_make` to `std_crates_for_make_run`) - rust-lang/rust#159275 (remove obsolete comment) - rust-lang/rust#159277 (Construct `tokens` for attrs made by `mk_attr_word` and other variants) - rust-lang/rust#159283 (Remove obsolete verbose flag from deref/ref suggestions) - rust-lang/rust#159290 (rustc-dev-guide subtree update)

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

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