Initial commit of (very basic) if converter.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37092 91177308-0d34-0410-b5e6-96231b3b80d8

include/llvm/CodeGen/Passes.h

@@ -81,6 +81,9 @@ namespace llvm {
   /// branches.
   FunctionPass *createBranchFoldingPass();
 
+  /// IfConverter Pass - This pass performs machine code if conversion.
+  FunctionPass *createIfConverterPass();
+
   /// DebugLabelFoldingPass - This pass prunes out redundant debug labels.  This
   /// allows a debug emitter to determine if the range of two labels is empty,
   /// by seeing if the labels map to the same reduced label.