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Drop support for legacy PM with LLVM 15 #96072

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nikic opened this issue Apr 15, 2022 · 0 comments · Fixed by #96215
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Drop support for legacy PM with LLVM 15 #96072

nikic opened this issue Apr 15, 2022 · 0 comments · Fixed by #96215
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A-LLVM Area: Code generation parts specific to LLVM. Both correctness bugs and optimization-related issues.

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nikic commented Apr 15, 2022

Support for the legacy pass manager is being actively removed in LLVM 15. We need to make -Z new-llvm-pass-manager=no error with LLVM 15 (or warn and ignore), and remove references to certain FFI functions either exported by the Rust wrapper or llvm-c.

This would be at least the LLVMRustCreate*Pass family of functions, as well as the LLVMPsasManagerBuilder* family of functions. As the latter are provided by llvm-c, I guess we'd want to use weak symbols for those.
@nikic nikic added the A-LLVM Area: Code generation parts specific to LLVM. Both correctness bugs and optimization-related issues. label Apr 15, 2022
@nikic nikic self-assigned this Apr 19, 2022
@nikic nikic mentioned this issue Apr 19, 2022
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@bors bors closed this as completed in 433f1f4 Apr 25, 2022
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Drop support for legacy PM with LLVM 15 nikic/rust
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