Remove LLVMRustMarkAllFunctionsNounwind #92877
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This was originally introduced in rust-lang#10916 as a way to remove all landing pads when performing LTO. However this is no longer necessary today since rustc properly marks all functions and call-sites as nounwind where appropriate. In fact this is incorrect in the presence of `extern "C-unwind"` which must create a landing pad when compiled with `-C panic=abort` so that foreign exceptions are caught and properly turned into aborts.
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@bors r+ This makes sense to me, and if there are any regressions we can adjust the nounwind attribute emission at a later point, as necessary. |
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Jan 17, 2022
…askrgr Rollup of 10 pull requests Successful merges: - rust-lang#90498 (Clarifications in the target tier policy) - rust-lang#92164 (Implement `#[rustc_must_implement_one_of]` attribute) - rust-lang#92729 (rustc_codegen_llvm: Remove (almost) unused span parameter from many functions in metadata.rs) - rust-lang#92752 (Correct minor typos in some long error code explanations) - rust-lang#92801 (Enable wrapping words by default) - rust-lang#92825 (Rename environment variable for overriding rustc version) - rust-lang#92877 (Remove LLVMRustMarkAllFunctionsNounwind) - rust-lang#92936 (rustdoc: Remove `collect` in `html::markdown::parse`) - rust-lang#92956 (Add `log2` and `log10` to `NonZeroU*`) - rust-lang#92960 (Use `carrying_{mul|add}` in `num::bignum`) Failed merges: r? `@ghost` `@rustbot` modify labels: rollup
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This was originally introduced in #10916 as a way to remove all landing
pads when performing LTO. However this is no longer necessary today
since rustc properly marks all functions and call-sites as nounwind
where appropriate.
In fact this is incorrect in the presence of
extern "C-unwind"whichmust create a landing pad when compiled with
-C panic=abortso thatforeign exceptions are caught and properly turned into aborts.