From c6a4f5e819217e1e12c458aed8e7b122e23a3a58 Mon Sep 17 00:00:00 2001
From: Stephen Hines <srhines@google.com>
Date: Mon, 21 Jul 2014 00:45:20 -0700
Subject: Update LLVM for rebase to r212749.

Includes a cherry-pick of:
r212948 - fixes a small issue with atomic calls

Change-Id: Ib97bd980b59f18142a69506400911a6009d9df18
---
 lib/Bitcode/Reader/BitcodeReader.h | 90 ++++++++++++++++++--------------------
 1 file changed, 42 insertions(+), 48 deletions(-)

(limited to 'lib/Bitcode/Reader/BitcodeReader.h')

diff --git a/lib/Bitcode/Reader/BitcodeReader.h b/lib/Bitcode/Reader/BitcodeReader.h
index 593d8f9..1d4869a 100644
--- a/lib/Bitcode/Reader/BitcodeReader.h
+++ b/lib/Bitcode/Reader/BitcodeReader.h
@@ -22,10 +22,11 @@
 #include "llvm/IR/OperandTraits.h"
 #include "llvm/IR/Type.h"
 #include "llvm/IR/ValueHandle.h"
-#include "llvm/Support/system_error.h"
+#include <system_error>
 #include <vector>
 
 namespace llvm {
+  class Comdat;
   class MemoryBuffer;
   class LLVMContext;
 
@@ -125,8 +126,7 @@ public:
 class BitcodeReader : public GVMaterializer {
   LLVMContext &Context;
   Module *TheModule;
-  MemoryBuffer *Buffer;
-  bool BufferOwned;
+  std::unique_ptr<MemoryBuffer> Buffer;
   std::unique_ptr<BitstreamReader> StreamFile;
   BitstreamCursor Stream;
   DataStreamer *LazyStreamer;
@@ -136,6 +136,7 @@ class BitcodeReader : public GVMaterializer {
   std::vector<Type*> TypeList;
   BitcodeReaderValueList ValueList;
   BitcodeReaderMDValueList MDValueList;
+  std::vector<Comdat *> ComdatList;
   SmallVector<Instruction *, 64> InstructionList;
   SmallVector<SmallVector<uint64_t, 64>, 64> UseListRecords;
 
@@ -193,7 +194,7 @@ class BitcodeReader : public GVMaterializer {
   /// not need this flag.
   bool UseRelativeIDs;
 
-  static const error_category &BitcodeErrorCategory();
+  static const std::error_category &BitcodeErrorCategory();
 
 public:
   enum ErrorType {
@@ -219,47 +220,39 @@ public:
     InvalidValue // Invalid version, inst number, attr number, etc
   };
 
-  error_code Error(ErrorType E) {
-    return error_code(E, BitcodeErrorCategory());
+  std::error_code Error(ErrorType E) {
+    return std::error_code(E, BitcodeErrorCategory());
   }
 
   explicit BitcodeReader(MemoryBuffer *buffer, LLVMContext &C)
-    : Context(C), TheModule(nullptr), Buffer(buffer), BufferOwned(false),
-      LazyStreamer(nullptr), NextUnreadBit(0), SeenValueSymbolTable(false),
-      ValueList(C), MDValueList(C),
-      SeenFirstFunctionBody(false), UseRelativeIDs(false) {
-  }
+      : Context(C), TheModule(nullptr), Buffer(buffer), LazyStreamer(nullptr),
+        NextUnreadBit(0), SeenValueSymbolTable(false), ValueList(C),
+        MDValueList(C), SeenFirstFunctionBody(false), UseRelativeIDs(false) {}
   explicit BitcodeReader(DataStreamer *streamer, LLVMContext &C)
-    : Context(C), TheModule(nullptr), Buffer(nullptr), BufferOwned(false),
-      LazyStreamer(streamer), NextUnreadBit(0), SeenValueSymbolTable(false),
-      ValueList(C), MDValueList(C),
-      SeenFirstFunctionBody(false), UseRelativeIDs(false) {
-  }
-  ~BitcodeReader() {
-    FreeState();
-  }
+      : Context(C), TheModule(nullptr), Buffer(nullptr), LazyStreamer(streamer),
+        NextUnreadBit(0), SeenValueSymbolTable(false), ValueList(C),
+        MDValueList(C), SeenFirstFunctionBody(false), UseRelativeIDs(false) {}
+  ~BitcodeReader() { FreeState(); }
 
   void materializeForwardReferencedFunctions();
 
   void FreeState();
 
-  /// setBufferOwned - If this is true, the reader will destroy the MemoryBuffer
-  /// when the reader is destroyed.
-  void setBufferOwned(bool Owned) { BufferOwned = Owned; }
+  void releaseBuffer() override;
 
   bool isMaterializable(const GlobalValue *GV) const override;
   bool isDematerializable(const GlobalValue *GV) const override;
-  error_code Materialize(GlobalValue *GV) override;
-  error_code MaterializeModule(Module *M) override;
+  std::error_code Materialize(GlobalValue *GV) override;
+  std::error_code MaterializeModule(Module *M) override;
   void Dematerialize(GlobalValue *GV) override;
 
   /// @brief Main interface to parsing a bitcode buffer.
   /// @returns true if an error occurred.
-  error_code ParseBitcodeInto(Module *M);
+  std::error_code ParseBitcodeInto(Module *M);
 
   /// @brief Cheap mechanism to just extract module triple
   /// @returns true if an error occurred.
-  error_code ParseTriple(std::string &Triple);
+  ErrorOr<std::string> parseTriple();
 
   static uint64_t decodeSignRotatedValue(uint64_t V);
 
@@ -346,28 +339,29 @@ private:
     return getFnValueByID(ValNo, Ty);
   }
 
-  error_code ParseAttrKind(uint64_t Code, Attribute::AttrKind *Kind);
-  error_code ParseModule(bool Resume);
-  error_code ParseAttributeBlock();
-  error_code ParseAttributeGroupBlock();
-  error_code ParseTypeTable();
-  error_code ParseTypeTableBody();
-
-  error_code ParseValueSymbolTable();
-  error_code ParseConstants();
-  error_code RememberAndSkipFunctionBody();
-  error_code ParseFunctionBody(Function *F);
-  error_code GlobalCleanup();
-  error_code ResolveGlobalAndAliasInits();
-  error_code ParseMetadata();
-  error_code ParseMetadataAttachment();
-  error_code ParseModuleTriple(std::string &Triple);
-  error_code ParseUseLists();
-  error_code InitStream();
-  error_code InitStreamFromBuffer();
-  error_code InitLazyStream();
-  error_code FindFunctionInStream(Function *F,
-         DenseMap<Function*, uint64_t>::iterator DeferredFunctionInfoIterator);
+  std::error_code ParseAttrKind(uint64_t Code, Attribute::AttrKind *Kind);
+  std::error_code ParseModule(bool Resume);
+  std::error_code ParseAttributeBlock();
+  std::error_code ParseAttributeGroupBlock();
+  std::error_code ParseTypeTable();
+  std::error_code ParseTypeTableBody();
+
+  std::error_code ParseValueSymbolTable();
+  std::error_code ParseConstants();
+  std::error_code RememberAndSkipFunctionBody();
+  std::error_code ParseFunctionBody(Function *F);
+  std::error_code GlobalCleanup();
+  std::error_code ResolveGlobalAndAliasInits();
+  std::error_code ParseMetadata();
+  std::error_code ParseMetadataAttachment();
+  ErrorOr<std::string> parseModuleTriple();
+  std::error_code ParseUseLists();
+  std::error_code InitStream();
+  std::error_code InitStreamFromBuffer();
+  std::error_code InitLazyStream();
+  std::error_code FindFunctionInStream(
+      Function *F,
+      DenseMap<Function *, uint64_t>::iterator DeferredFunctionInfoIterator);
 };
 
 } // End llvm namespace
-- 
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