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rustc_llvm: Add a -Z print-llvm-stats option to expose LLVM statistics.

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LLVM has a neat [statistics] feature that tracks how often optimizations kick
in. It's very handy for optimization work. Since we expose the LLVM pass
timings, I thought it made sense to expose the LLVM statistics too.

[statistics]: https://llvm.org/docs/ProgrammersManual.html#the-statistic-class-stats-option
This commit is contained in:
Patrick Walton 2022-11-05 01:08:57 -07:00 • committed by khei4
parent d873fa7382
commit 2c0c87d959
1 changed files with 4 additions and 0 deletions
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4
src/lib.rs
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@ -239,6 +239,10 @@ impl WriteBackendMethods for GccCodegenBackend {
unimplemented!(); unimplemented!();
} }
fn print_statistics(&self) {
unimplemented!()
}
unsafe fn optimize(_cgcx: &CodegenContext<Self>, _diag_handler: &Handler, module: &ModuleCodegen<Self::Module>, config: &ModuleConfig) -> Result<(), FatalError> { unsafe fn optimize(_cgcx: &CodegenContext<Self>, _diag_handler: &Handler, module: &ModuleCodegen<Self::Module>, config: &ModuleConfig) -> Result<(), FatalError> {
module.module_llvm.context.set_optimization_level(to_gcc_opt_level(config.opt_level)); module.module_llvm.context.set_optimization_level(to_gcc_opt_level(config.opt_level));
Ok(()) Ok(())