From 2c0c87d9592d68b0cad47af9882f8bb6363187fa Mon Sep 17 00:00:00 2001
From: Patrick Walton <pcwalton@fb.com>
Date: Sat, 5 Nov 2022 01:08:57 -0700
Subject: [PATCH] rustc_llvm: Add a `-Z print-llvm-stats` option to expose LLVM
 statistics.

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
---
 src/lib.rs | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/lib.rs b/src/lib.rs
index 2a6b642782d..04ac0254a81 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -239,6 +239,10 @@ impl WriteBackendMethods for GccCodegenBackend {
         unimplemented!();
     }
 
+    fn print_statistics(&self) {
+        unimplemented!()
+    }
+
     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));
         Ok(())