[asan] enable asan only for the functions that have Attribute::AddressSafety

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@148846 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Transforms/Instrumentation/AddressSanitizer.cpp b/lib/Transforms/Instrumentation/AddressSanitizer.cpp
index 6ee9550..3f06815 100644
--- a/lib/Transforms/Instrumentation/AddressSanitizer.cpp
+++ b/lib/Transforms/Instrumentation/AddressSanitizer.cpp
@@ -608,6 +608,7 @@
 bool AddressSanitizer::handleFunction(Module &M, Function &F) {
   if (BL->isIn(F)) return false;
   if (&F == AsanCtorFunction) return false;
+  if (!F.hasFnAttr(Attribute::AddressSafety)) return false;
 
   if (!ClDebugFunc.empty() && ClDebugFunc != F.getName())
     return false;