Fix using wrong result type for setcc.

When reducing the bitwidth of a comparison against a constant, the
original setcc's result type was used, which was incorrect.

No test since I don't think any other in tree targets change the
bitwidth of the setcc type depending on the bitwidth of the compared
type.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@208236 91177308-0d34-0410-b5e6-96231b3b80d8

include/llvm/CodeGen/SelectionDAG.h

@@ -557,6 +557,11 @@ public:
   /// value assuming it was the smaller SrcTy value.
   SDValue getZeroExtendInReg(SDValue Op, SDLoc DL, EVT SrcTy);
 
+  /// getBoolExtOrTrunc - Convert Op, which must be of integer type, to the
+  /// integer type VT, by using an extension appropriate for the target's
+  /// BooleanContent or truncating it.
+  SDValue getBoolExtOrTrunc(SDValue Op, SDLoc SL, EVT VT);
+
   /// getNOT - Create a bitwise NOT operation as (XOR Val, -1).
   SDValue getNOT(SDLoc DL, SDValue Val, EVT VT);