Update clang to r339409b.

Change-Id: Ied8a188bb072c40035320acedc86164b66d920af
diff --git a/linux-x64/clang/include/llvm/CodeGen/MachineFrameInfo.h b/linux-x64/clang/include/llvm/CodeGen/MachineFrameInfo.h
index 2d6081f..02b2f1b 100644
--- a/linux-x64/clang/include/llvm/CodeGen/MachineFrameInfo.h
+++ b/linux-x64/clang/include/llvm/CodeGen/MachineFrameInfo.h
@@ -266,6 +266,10 @@
   /// It is only valid during and after prolog/epilog code insertion.
   unsigned MaxCallFrameSize = ~0u;
 
+  /// The number of bytes of callee saved registers that the target wants to
+  /// report for the current function in the CodeView S_FRAMEPROC record.
+  unsigned CVBytesOfCalleeSavedRegisters = 0;
+
   /// The prolog/epilog code inserter fills in this vector with each
   /// callee saved register saved in the frame.  Beyond its use by the prolog/
   /// epilog code inserter, this data used for debug info and exception
@@ -603,6 +607,15 @@
   }
   void setMaxCallFrameSize(unsigned S) { MaxCallFrameSize = S; }
 
+  /// Returns how many bytes of callee-saved registers the target pushed in the
+  /// prologue. Only used for debug info.
+  unsigned getCVBytesOfCalleeSavedRegisters() const {
+    return CVBytesOfCalleeSavedRegisters;
+  }
+  void setCVBytesOfCalleeSavedRegisters(unsigned S) {
+    CVBytesOfCalleeSavedRegisters = S;
+  }
+
   /// Create a new object at a fixed location on the stack.
   /// All fixed objects should be created before other objects are created for
   /// efficiency. By default, fixed objects are not pointed to by LLVM IR