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| author | Wesley Wiser <wwiser@gmail.com> | 2020-01-31 18:58:28 -0500 |
|---|---|---|
| committer | Wesley Wiser <wwiser@gmail.com> | 2020-02-01 14:19:17 -0500 |
| commit | f5f86be1d40f30b3183ec148f443afa73d0cbe15 (patch) | |
| tree | b502ea8bf896068391dadc47ac11b9f6858fc219 /src/librustc_codegen_llvm/llvm/ffi.rs | |
| parent | cd1ef390e731ed77b90b11b1f77e2c5ca641b261 (diff) | |
| download | rust-f5f86be1d40f30b3183ec148f443afa73d0cbe15.tar.gz rust-f5f86be1d40f30b3183ec148f443afa73d0cbe15.zip | |
Add support for enabling the LLVM time-trace feature
I found this helpful while investigating an LLVM performance issue. Passing `-Z llvm-time-trace` causes a `llvm_timings.json` file to be created. This file can be inspected in either the Chrome Profiler tools or with any other compatible tool like SpeedScope. More information on the LLVM feature: - https://aras-p.info/blog/2019/01/16/time-trace-timeline-flame-chart-profiler-for-Clang/ - https://reviews.llvm.org/rL357340
Diffstat (limited to 'src/librustc_codegen_llvm/llvm/ffi.rs')
| -rw-r--r-- | src/librustc_codegen_llvm/llvm/ffi.rs | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/src/librustc_codegen_llvm/llvm/ffi.rs b/src/librustc_codegen_llvm/llvm/ffi.rs index 875b2c47b3b..3f37f86676c 100644 --- a/src/librustc_codegen_llvm/llvm/ffi.rs +++ b/src/librustc_codegen_llvm/llvm/ffi.rs @@ -1454,6 +1454,10 @@ extern "C" { pub fn LLVMInitializePasses(); + pub fn LLVMTimeTraceProfilerInitialize(); + + pub fn LLVMTimeTraceProfilerFinish(FileName: *const c_char); + pub fn LLVMAddAnalysisPasses(T: &'a TargetMachine, PM: &PassManager<'a>); pub fn LLVMPassManagerBuilderCreate() -> &'static mut PassManagerBuilder; |