From 09cd2dc94d9ef3d7c0e53962a595e7aa58ae57ce Mon Sep 17 00:00:00 2001
From: Nick Lewycky <nicholas@mxc.ca>
Date: Mon, 28 Nov 2011 22:14:02 +0000
Subject: [PATCH] Don't define these unless we plan to use them.

llvm-svn: 145289
---
 lib/Support/Valgrind.cpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/lib/Support/Valgrind.cpp b/lib/Support/Valgrind.cpp
index 078d705183d..2b250a35775 100644
--- a/lib/Support/Valgrind.cpp
+++ b/lib/Support/Valgrind.cpp
@@ -53,6 +53,7 @@ void llvm::sys::ValgrindDiscardTranslations(const void *Addr, size_t Len) {
 
 #endif  // !HAVE_VALGRIND_VALGRIND_H
 
+#if LLVM_ENABLE_THREADS != 0 && !defined(NDEBUG)
 // These functions require no implementation, tsan just looks at the arguments
 // they're called with.
 extern "C" {
@@ -63,3 +64,4 @@ void AnnotateHappensAfter(const char *file, int line,
 void AnnotateIgnoreWritesBegin(const char *file, int line) {}
 void AnnotateIgnoreWritesEnd(const char *file, int line) {}
 }
+#endif