From: Reid Kleckner <reid@kleckner.net>
Date: Thu, 13 Feb 2014 00:44:34 +0000 (+0000)
Subject: Fix uninitialized read in vtordisp pragma code.
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=26c70bc947487298bfb6a2bc8b05eee2398f1743;p=clang

Fix uninitialized read in vtordisp pragma code.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@201280 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/Parse/ParsePragma.cpp b/lib/Parse/ParsePragma.cpp
index 6d92edb1df..90929d6918 100644
--- a/lib/Parse/ParsePragma.cpp
+++ b/lib/Parse/ParsePragma.cpp
@@ -958,7 +958,7 @@ void PragmaMSVtorDisp::HandlePragma(Preprocessor &PP,
   }
 
 
-  uint64_t Value;
+  uint64_t Value = 0;
   if (Kind == Sema::PVDK_Push || Kind == Sema::PVDK_Set) {
     const IdentifierInfo *II = Tok.getIdentifierInfo();
     if (II && II->isStr("off")) {
@@ -998,8 +998,8 @@ void PragmaMSVtorDisp::HandlePragma(Preprocessor &PP,
   AnnotTok.startToken();
   AnnotTok.setKind(tok::annot_pragma_ms_vtordisp);
   AnnotTok.setLocation(VtorDispLoc);
-  AnnotTok.setAnnotationValue(
-      reinterpret_cast<void *>(static_cast<uintptr_t>((Kind << 16) | Value)));
+  AnnotTok.setAnnotationValue(reinterpret_cast<void *>(
+      static_cast<uintptr_t>((Kind << 16) | (Value & 0xFFFF))));
   PP.EnterToken(AnnotTok);
 }