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rust/compiler/rustc_codegen_llvm
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Tomasz Miąsko 1aee8083be Import small cold functions 
The Rust code is often written under an assumption that for generic
methods inline attribute is mostly unnecessary, since for optimized
builds using ThinLTO, a method will be generated in at least one CGU and
available for import.

For example, deref implementations for Box, Vec, MutexGuard, and
MutexGuard are not currently marked as inline, neither is identity
implementation of From trait.

In PGO builds, when functions are determined to be cold, the default
multiplier of zero will stop the import, even for completely trivial
functions.

Increase slightly the default multiplier from 0 to 0.1 to import them
regardless.
2021-03-11 00:00:00 +00:00
..
src Import small cold functions 2021-03-11 00:00:00 +00:00
Cargo.toml Rollup merge of #82537 - wesleywiser:update_measureme, r=oli-obk 2021-02-27 21:56:20 +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.