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rust/compiler/rustc_codegen_llvm
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bors 3dc3c524f7 Auto merge of #133990 - Walnut356:static_const, r=workingjubilee 
[Debuginfo] Force enum `DISCR_*` to `static const u64` to allow for inspection via LLDB

see [here](https://rust-lang.zulipchat.com/#narrow/channel/317568-t-compiler.2Fwg-debugging/topic/Revamping.20Debuginfo/near/486614878) for more info.

This change mainly helps `*-msvc` debugged with LLDB. Currently, LLDB cannot inspect `static` struct fields, so the intended visualization for enums is only borderline functional, and niche enums with ranges of discriminant cannot be determined at all .

LLDB *can* inspect `static const` values (though for whatever reason, non-enum/non-u64 consts don't work).

This change adds the `LLVMRustDIBuilderCreateQualifiedType` to the rust FFI layer to wrap the discr type with a `const` modifier, as well as forcing all generated integer enum `DISCR_*` values to be u64's. Those values will only ever be used by debugger visualizers anyway, so it shouldn't be a huge deal, but I left a fixme comment for it just in case.. The `tag` also still properly reflects the discriminant type, so no information is lost.
2025-01-04 23:56:29 +00:00
..
src Auto merge of #133990 - Walnut356:static_const, r=workingjubilee 2025-01-04 23:56:29 +00:00
Cargo.toml rename rustc_attr to rustc_attr_parsing and create rustc_attr_data_structures 2024-12-16 19:08:19 +01:00
messages.ftl upstream rustc_codegen_llvm changes for enzyme/autodiff 2025-01-01 21:42:45 +01:00
README.md mv compiler to compiler/ 2020-08-30 18:45:07 +03:00

README.md

The codegen crate contains the code to convert from MIR into LLVM IR, and then from LLVM IR into machine code. In general it contains code that runs towards the end of the compilation process.

For more information about how codegen works, see the rustc dev guide.