Michael Benfield a17193dbb9 Enable AutoFDO. ... This largely involves implementing the options debug-info-for-profiling and profile-sample-use and forwarding them on to LLVM. AutoFDO can be used on x86-64 Linux like this: rustc -O -Cdebug-info-for-profiling main.rs -o main perf record -b ./main create_llvm_prof --binary=main --out=code.prof rustc -O -Cprofile-sample-use=code.prof main.rs -o main2 Now `main2` will have feedback directed optimization applied to it. The create_llvm_prof tool can be obtained from this github repository: https://github.com/google/autofdo Fixes #64892.		2021-10-06 19:36:52 +00:00
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src	Enable AutoFDO.	2021-10-06 19:36:52 +00:00
Cargo.toml	Migrate to 2021	2021-09-20 22:21:42 -04:00