Introduce new convenience methods for sign extending or

truncating an SDValue (depending on whether the target
type is bigger or smaller than the value's type); or zero
extending or truncating it.  Use it in a few places (this
seems to be a popular operation, but I only modified cases
of it in SelectionDAGBuild).  In particular, the eh_selector
lowering was doing this wrong due to a repeated rather than
inverted test, fixed with this change.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@84027 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 8 insertions, 0 deletions

diff --git a/include/llvm/CodeGen/SelectionDAG.h b/include/llvm/CodeGen/SelectionDAG.h
index eb2a727155..e0198ef2e3 100644
--- a/include/llvm/CodeGen/SelectionDAG.h
+++ b/include/llvm/CodeGen/SelectionDAG.h
@@ -381,6 +381,14 @@ public:
   SDValue getVectorShuffle(EVT VT, DebugLoc dl, SDValue N1, SDValue N2, 
                            const int *MaskElts);
 
+  /// getSExtOrTrunc - Convert Op, which must be of integer type, to the
+  /// integer type VT, by either sign-extending or truncating it.
+  SDValue getSExtOrTrunc(SDValue Op, DebugLoc DL, EVT VT);
+
+  /// getZExtOrTrunc - Convert Op, which must be of integer type, to the
+  /// integer type VT, by either zero-extending or truncating it.
+  SDValue getZExtOrTrunc(SDValue Op, DebugLoc DL, EVT VT);
+
   /// getZeroExtendInReg - Return the expression required to zero extend the Op
   /// value assuming it was the smaller SrcTy value.
   SDValue getZeroExtendInReg(SDValue Op, DebugLoc DL, EVT SrcTy);