Merge remote-tracking branch 'upstream/release_34' into merge-20140211

Conflicts:
	lib/Linker/LinkModules.cpp
	lib/Support/Unix/Signals.inc

Change-Id: Ia54f291fa5dc828052d2412736e8495c1282aa64

1 files changed, 25 insertions, 5 deletions

diff --git a/include/llvm/MC/MCFunction.h b/include/llvm/MC/MCFunction.h
index b85011e..22c9192 100644
--- a/include/llvm/MC/MCFunction.h
+++ b/include/llvm/MC/MCFunction.h
@@ -70,25 +70,33 @@ public:
 
   void addPredecessor(const MCBasicBlock *MCBB);
   bool isPredecessor(const MCBasicBlock *MCBB) const;
+
+  /// \brief Split block, mirrorring NewAtom = Insts->split(..).
+  /// This moves all successors to \p SplitBB, and
+  /// adds a fallthrough to it.
+  /// \p SplitBB The result of splitting Insts, a basic block directly following
+  /// this basic block.
+  void splitBasicBlock(MCBasicBlock *SplitBB);
   /// @}
 };
 
 /// \brief Represents a function in machine code, containing MCBasicBlocks.
-/// MCFunctions are created using MCModule::createFunction.
+/// MCFunctions are created by MCModule.
 class MCFunction {
   MCFunction           (const MCFunction&) LLVM_DELETED_FUNCTION;
   MCFunction& operator=(const MCFunction&) LLVM_DELETED_FUNCTION;
 
   std::string Name;
+  MCModule *ParentModule;
   typedef std::vector<MCBasicBlock*> BasicBlockListTy;
   BasicBlockListTy Blocks;
 
   // MCModule owns the function.
   friend class MCModule;
-  MCFunction(StringRef Name);
-public:
+  MCFunction(StringRef Name, MCModule *Parent);
   ~MCFunction();
 
+public:
   /// \brief Create an MCBasicBlock backed by Insts and add it to this function.
   /// \param Insts Sequence of straight-line code backing the basic block.
   /// \returns The newly created basic block.
@@ -96,13 +104,21 @@ public:
 
   StringRef getName() const { return Name; }
 
-  /// \name Access to the function's basic blocks. No ordering is enforced.
+  /// \name Get the owning MC Module.
+  /// @{
+  const MCModule *getParent() const { return ParentModule; }
+        MCModule *getParent()       { return ParentModule; }
+  /// @}
+
+  /// \name Access to the function's basic blocks. No ordering is enforced,
+  /// except that the first block is the entry block.
   /// @{
   /// \brief Get the entry point basic block.
   const MCBasicBlock *getEntryBlock() const { return front(); }
         MCBasicBlock *getEntryBlock()       { return front(); }
 
-  // NOTE: Dereferencing iterators gives pointers, so maybe a list is best here.
+  bool empty() const { return Blocks.empty(); }
+
   typedef BasicBlockListTy::const_iterator const_iterator;
   typedef BasicBlockListTy::      iterator       iterator;
   const_iterator begin() const { return Blocks.begin(); }
@@ -114,6 +130,10 @@ public:
         MCBasicBlock* front()       { return Blocks.front(); }
   const MCBasicBlock*  back() const { return Blocks.back(); }
         MCBasicBlock*  back()       { return Blocks.back(); }
+
+  /// \brief Find the basic block, if any, that starts at \p StartAddr.
+  const MCBasicBlock *find(uint64_t StartAddr) const;
+        MCBasicBlock *find(uint64_t StartAddr);
   /// @}
 };