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5e7c1b93ac
rust/compiler/rustc_codegen_llvm
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Zalathar 5e7c1b93ac coverage: Avoid a query stability hazard in function_coverage_map 
When #118865 started enforcing the `rustc::potential_query_instability` lint in
`rustc_codegen_llvm`, it added an exemption for this site, arguing that the
entries are only used to create a list of filenames that is later sorted.

However, the list of entries also gets traversed when creating the function
coverage records in LLVM IR, which may be sensitive to hash-based ordering.

This patch therefore changes `function_coverage_map` to use `FxIndexMap`, which
should avoid hash-based instability by iterating in insertion order.
2024-01-02 22:57:04 +11:00
..
src coverage: Avoid a query stability hazard in function_coverage_map 2024-01-02 22:57:04 +11:00
Cargo.toml Update to bitflags 2 in the compiler 2023-12-30 18:17:28 +01:00
messages.ftl warn when using an unstable feature with -Ctarget-feature 2023-11-06 09:44:00 +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.