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| author | Alisa Sireneva <me@purplesyringa.moe> | 2025-07-15 12:55:46 +0300 |
|---|---|---|
| committer | Alisa Sireneva <me@purplesyringa.moe> | 2025-07-23 02:17:54 +0300 |
| commit | ed11a396435fc1de59bf40b39789cf8b5c7f5307 (patch) | |
| tree | 26597747d75ece82e83fe66736d4f04ccaf024dd /compiler/rustc_codegen_ssa | |
| parent | a7a1618e6c835f1f00940ad72203d05808209a0d (diff) | |
| download | rust-ed11a396435fc1de59bf40b39789cf8b5c7f5307.tar.gz rust-ed11a396435fc1de59bf40b39789cf8b5c7f5307.zip | |
Don't special-case llvm.* as nounwind
Certain LLVM intrinsics, such as `llvm.wasm.throw`, can unwind. Marking them as nounwind causes us to skip cleanup of locals and optimize out `catch_unwind` under inlining or when `llvm.wasm.throw` is used directly by user code. The motivation for forcibly marking llvm.* as nounwind is no longer present: most intrinsics are linked as `extern "C"` or other non-unwinding ABIs, so we won't codegen `invoke` for them anyway.
Diffstat (limited to 'compiler/rustc_codegen_ssa')
| -rw-r--r-- | compiler/rustc_codegen_ssa/src/codegen_attrs.rs | 9 |
1 files changed, 0 insertions, 9 deletions
diff --git a/compiler/rustc_codegen_ssa/src/codegen_attrs.rs b/compiler/rustc_codegen_ssa/src/codegen_attrs.rs index dd49db26689..3f456fa115a 100644 --- a/compiler/rustc_codegen_ssa/src/codegen_attrs.rs +++ b/compiler/rustc_codegen_ssa/src/codegen_attrs.rs @@ -511,15 +511,6 @@ fn codegen_fn_attrs(tcx: TyCtxt<'_>, did: LocalDefId) -> CodegenFnAttrs { err.emit(); } - // Any linkage to LLVM intrinsics for now forcibly marks them all as never - // unwinds since LLVM sometimes can't handle codegen which `invoke`s - // intrinsic functions. - if let Some(name) = &codegen_fn_attrs.link_name - && name.as_str().starts_with("llvm.") - { - codegen_fn_attrs.flags |= CodegenFnAttrFlags::NEVER_UNWIND; - } - if let Some(features) = check_tied_features( tcx.sess, &codegen_fn_attrs |