3 files changed, 31 insertions, 2 deletions
diff --git a/compiler/rustc_codegen_llvm/src/lib.rs b/compiler/rustc_codegen_llvm/src/lib.rs
index 24ba28bbc82..b0354376210 100644
--- a/compiler/rustc_codegen_llvm/src/lib.rs
+++ b/compiler/rustc_codegen_llvm/src/lib.rs
@@ -46,6 +46,7 @@ use rustc_span::symbol::Symbol;
 
 use std::any::Any;
 use std::ffi::CStr;
+use std::io::Write;
 
 mod back {
     pub mod archive;
@@ -178,7 +179,28 @@ impl WriteBackendMethods for LlvmCodegenBackend {
     type ThinBuffer = back::lto::ThinBuffer;
     fn print_pass_timings(&self) {
         unsafe {
-            llvm::LLVMRustPrintPassTimings();
+            let mut size = 0;
+            let cstr = llvm::LLVMRustPrintPassTimings(&mut size as *mut usize);
+            if cstr.is_null() {
+                println!("failed to get pass timings");
+            } else {
+                let timings = std::slice::from_raw_parts(cstr as *const u8, size);
+                std::io::stdout().write_all(timings).unwrap();
+                libc::free(cstr as *mut _);
+            }
+        }
+    }
+    fn print_statistics(&self) {
+        unsafe {
+            let mut size = 0;
+            let cstr = llvm::LLVMRustPrintStatistics(&mut size as *mut usize);
+            if cstr.is_null() {
+                println!("failed to get pass stats");
+            } else {
+                let stats = std::slice::from_raw_parts(cstr as *const u8, size);
+                std::io::stdout().write_all(stats).unwrap();
+                libc::free(cstr as *mut _);
+            }
         }
     }
     fn run_link(
diff --git a/compiler/rustc_codegen_llvm/src/llvm/ffi.rs b/compiler/rustc_codegen_llvm/src/llvm/ffi.rs
index 605f0154773..fd88994c31c 100644
--- a/compiler/rustc_codegen_llvm/src/llvm/ffi.rs
+++ b/compiler/rustc_codegen_llvm/src/llvm/ffi.rs
@@ -1868,7 +1868,10 @@ extern "C" {
     pub fn LLVMRustGetLastError() -> *const c_char;
 
     /// Print the pass timings since static dtors aren't picking them up.
-    pub fn LLVMRustPrintPassTimings();
+    pub fn LLVMRustPrintPassTimings(size: *const size_t) -> *const c_char;
+
+    /// Print the statistics since static dtors aren't picking them up.
+    pub fn LLVMRustPrintStatistics(size: *const size_t) -> *const c_char;
 
     pub fn LLVMStructCreateNamed(C: &Context, Name: *const c_char) -> &Type;
 
diff --git a/compiler/rustc_codegen_llvm/src/llvm_util.rs b/compiler/rustc_codegen_llvm/src/llvm_util.rs
index 03be0654b50..12649de5866 100644
--- a/compiler/rustc_codegen_llvm/src/llvm_util.rs
+++ b/compiler/rustc_codegen_llvm/src/llvm_util.rs
@@ -110,6 +110,10 @@ unsafe fn configure_llvm(sess: &Session) {
         // Use non-zero `import-instr-limit` multiplier for cold callsites.
         add("-import-cold-multiplier=0.1", false);
 
+        if sess.print_llvm_stats() {
+            add("-stats", false);
+        }
+
         for arg in sess_args {
             add(&(*arg), true);
         }