From 0b5ca7850bd62a2558a4efb7de0c12dfe1f4fb8e Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Bj=C3=B6rn=20Steinbrink?= <bsteinbr@gmail.com>
Date: Sat, 28 Feb 2015 22:40:39 +0100
Subject: [PATCH] Re-enable -Z time-llvm-passes when using a single codegen
 unit

The timing code break when using multiple codegen units, but that
shouldn't stop us from using it with a single codegen unit.
---
 src/librustc_trans/back/write.rs | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/librustc_trans/back/write.rs b/src/librustc_trans/back/write.rs
index a1fc63778ce8a..cd14fe529b1a7 100644
--- a/src/librustc_trans/back/write.rs
+++ b/src/librustc_trans/back/write.rs
@@ -851,7 +851,9 @@ pub fn run_passes(sess: &Session,
 
     // FIXME: time_llvm_passes support - does this use a global context or
     // something?
-    //if sess.time_llvm_passes() { llvm::LLVMRustPrintPassTimings(); }
+    if sess.opts.cg.codegen_units == 1 && sess.time_llvm_passes() {
+        unsafe { llvm::LLVMRustPrintPassTimings(); }
+    }
 }
 
 struct WorkItem {