diff options
| author | Michael Benfield <mbenfield@google.com> | 2021-05-07 07:41:37 +0000 |
|---|---|---|
| committer | Michael Benfield <mbenfield@google.com> | 2021-10-06 19:36:52 +0000 |
| commit | a17193dbb931ea0c8b66d82f640385bce8b4929a (patch) | |
| tree | 5649047fed7b0c037e06ba0cfc05bd70028428e1 /compiler/rustc_codegen_llvm/src/llvm | |
| parent | d7539a6af09e5889ed9bcb8b49571b7a59c32e65 (diff) | |
| download | rust-a17193dbb931ea0c8b66d82f640385bce8b4929a.tar.gz rust-a17193dbb931ea0c8b66d82f640385bce8b4929a.zip | |
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.
Diffstat (limited to 'compiler/rustc_codegen_llvm/src/llvm')
| -rw-r--r-- | compiler/rustc_codegen_llvm/src/llvm/ffi.rs | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/compiler/rustc_codegen_llvm/src/llvm/ffi.rs b/compiler/rustc_codegen_llvm/src/llvm/ffi.rs index 436d906827b..5d437b2a068 100644 --- a/compiler/rustc_codegen_llvm/src/llvm/ffi.rs +++ b/compiler/rustc_codegen_llvm/src/llvm/ffi.rs @@ -2176,6 +2176,7 @@ extern "C" { PrepareForThinLTO: bool, PGOGenPath: *const c_char, PGOUsePath: *const c_char, + PGOSampleUsePath: *const c_char, ); pub fn LLVMRustAddLibraryInfo( PM: &PassManager<'a>, @@ -2210,6 +2211,8 @@ extern "C" { PGOUsePath: *const c_char, InstrumentCoverage: bool, InstrumentGCOV: bool, + PGOSampleUsePath: *const c_char, + DebugInfoForProfiling: bool, llvm_selfprofiler: *mut c_void, begin_callback: SelfProfileBeforePassCallback, end_callback: SelfProfileAfterPassCallback, |