diff --git a/AST/CFG.cpp b/AST/CFG.cpp
index d91f9c3..e1c1a74 100644
--- a/AST/CFG.cpp
+++ b/AST/CFG.cpp
@@ -393,7 +393,7 @@
 CFGBlock* CFGBuilder::VisitCompoundStmt(CompoundStmt* C) {
   //   The value returned from this function is the last created CFGBlock
   //   that represents the "entry" point for the translated AST node.
-  CFGBlock* LastBlock;
+  CFGBlock* LastBlock = 0;
   
   for (CompoundStmt::reverse_body_iterator I = C->body_rbegin(),
        E = C->body_rend(); I != E; ++I )
diff --git a/Parse/ParseObjc.cpp b/Parse/ParseObjc.cpp
index 16434cd..9da15fa 100644
--- a/Parse/ParseObjc.cpp
+++ b/Parse/ParseObjc.cpp
@@ -445,7 +445,7 @@
   assert(Tok.getKind() == tok::l_paren && "expected (");
   
   SourceLocation LParenLoc = ConsumeParen(), RParenLoc;
-  TypeTy *Ty;
+  TypeTy *Ty = 0;
   
   while (isObjCTypeQualifier())
     ConsumeToken();
diff --git a/Sema/SemaDecl.cpp b/Sema/SemaDecl.cpp
index ae9c719..dd8fe22 100644
--- a/Sema/SemaDecl.cpp
+++ b/Sema/SemaDecl.cpp
@@ -485,7 +485,7 @@
     QualType R = GetTypeForDeclarator(D, S);
     assert(!R.isNull() && "GetTypeForDeclarator() returned null type");
 
-    FunctionDecl::StorageClass SC;
+    FunctionDecl::StorageClass SC = FunctionDecl::None;
     switch (D.getDeclSpec().getStorageClassSpec()) {
       default: assert(0 && "Unknown storage class!");
       case DeclSpec::SCS_auto: