Add a note about passing MVT::Other to getSetCCResultType.

llvm-svn: 61756

Author: CunningBaldrick

llvm/include/llvm/Target/TargetLowering.h

@@ -116,8 +116,11 @@ class TargetLowering {
   /// srl/add/sra.
   bool isPow2DivCheap() const { return Pow2DivIsCheap; }
 
-  /// getSetCCResultType - Return the ValueType of the result of setcc
-  /// operations.
+  /// getSetCCResultType - Return the ValueType of the result of SETCC
+  /// operations.  Also used to obtain the target's preferred type for
+  /// the condition operand of SELECT and BRCOND nodes.  In the case of
+  /// BRCOND the argument passed is MVT::Other since there are no other
+  /// operands to get a type hint from.
   virtual MVT getSetCCResultType(MVT VT) const;
 
   /// getBooleanContents - For targets without i1 registers, this gives the