From 0ffe6984297ece417e591003674d4466a201eb2a Mon Sep 17 00:00:00 2001
From: Derek Schuff <dschuff@google.com>
Date: Wed, 29 Feb 2012 00:07:09 +0000
Subject: [PATCH] Fix PR12080 by ensuring that MaterializeModule actually reads
 all the bitcode in the streaming case.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@151676 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Bitcode/Reader/BitcodeReader.cpp |  6 ++++++
 lib/Bitcode/Reader/BitcodeReader.h   | 10 ++++++----
 2 files changed, 12 insertions(+), 4 deletions(-)

diff --git a/lib/Bitcode/Reader/BitcodeReader.cpp b/lib/Bitcode/Reader/BitcodeReader.cpp
index 899154971b8..e3990403bd7 100644
--- a/lib/Bitcode/Reader/BitcodeReader.cpp
+++ b/lib/Bitcode/Reader/BitcodeReader.cpp
@@ -2789,6 +2789,12 @@ bool BitcodeReader::MaterializeModule(Module *M, std::string *ErrInfo) {
         Materialize(F, ErrInfo))
       return true;
 
+  // At this point, if there are any function bodies, the current bit is
+  // pointing to the END_BLOCK record after them. Now make sure the rest
+  // of the bits in the module have been read.
+  if (NextUnreadBit)
+    ParseModule(true);
+
   // Upgrade any intrinsic calls that slipped through (should not happen!) and
   // delete the old functions to clean up. We can't do this unless the entire
   // module is materialized because there could always be another function body
diff --git a/lib/Bitcode/Reader/BitcodeReader.h b/lib/Bitcode/Reader/BitcodeReader.h
index ad7baa732da..e7c4e94f785 100644
--- a/lib/Bitcode/Reader/BitcodeReader.h
+++ b/lib/Bitcode/Reader/BitcodeReader.h
@@ -182,13 +182,15 @@ class BitcodeReader : public GVMaterializer {
 public:
   explicit BitcodeReader(MemoryBuffer *buffer, LLVMContext &C)
     : Context(C), TheModule(0), Buffer(buffer), BufferOwned(false),
-      LazyStreamer(0), SeenValueSymbolTable(false), ErrorString(0),
-      ValueList(C), MDValueList(C), SeenFirstFunctionBody(false) {
+      LazyStreamer(0), NextUnreadBit(0), SeenValueSymbolTable(false),
+      ErrorString(0), ValueList(C), MDValueList(C),
+      SeenFirstFunctionBody(false) {
   }
   explicit BitcodeReader(DataStreamer *streamer, LLVMContext &C)
     : Context(C), TheModule(0), Buffer(0), BufferOwned(false),
-      LazyStreamer(streamer), SeenValueSymbolTable(false), ErrorString(0),
-      ValueList(C), MDValueList(C), SeenFirstFunctionBody(false) {
+      LazyStreamer(streamer), NextUnreadBit(0), SeenValueSymbolTable(false),
+      ErrorString(0), ValueList(C), MDValueList(C),
+      SeenFirstFunctionBody(false) {
   }
   ~BitcodeReader() {
     FreeState();