From ccd846b73ffce9296e392e550712926845098fab Mon Sep 17 00:00:00 2001
From: Chris Lattner <sabre@nondot.org>
Date: Wed, 18 Feb 2009 01:48:17 +0000
Subject: [PATCH] allow TimeRegion to take a potentially-null pointer to a
 timer for clang.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@64874 91177308-0d34-0410-b5e6-96231b3b80d8
---
 include/llvm/Support/Timer.h | 13 +++++++++----
 1 file changed, 9 insertions(+), 4 deletions(-)

diff --git a/include/llvm/Support/Timer.h b/include/llvm/Support/Timer.h
index b9882a97082..584199f4400 100644
--- a/include/llvm/Support/Timer.h
+++ b/include/llvm/Support/Timer.h
@@ -113,14 +113,19 @@ private:
 /// the relevant timer.  This makes it easy to time a region of code.
 ///
 class TimeRegion {
-  Timer &T;
+  Timer *T;
   TimeRegion(const TimeRegion &); // DO NOT IMPLEMENT
 public:
-  explicit TimeRegion(Timer &t) : T(t) {
-    T.startTimer();
+  explicit TimeRegion(Timer &t) : T(&t) {
+    T->startTimer();
+  }
+  explicit TimeRegion(Timer *t) : T(t) {
+    if (T)
+      T->startTimer();
   }
   ~TimeRegion() {
-    T.stopTimer();
+    if (T)
+      T->stopTimer();
   }
 };