Always compute all the bits in ComputeMaskedBits.

[oota-llvm.git] / lib / CodeGen / SelectionDAG / LegalizeIntegerTypes.cpp

diff --git a/lib/CodeGen/SelectionDAG/LegalizeIntegerTypes.cpp b/lib/CodeGen/SelectionDAG/LegalizeIntegerTypes.cpp
index 41506d17b7c3ff596ab9a2a3bd601dec613e07bc..95ddb1e0f6fb7cabab2c1a888d28783ae8a0e1f6 100644 (file)
--- a/lib/CodeGen/SelectionDAG/LegalizeIntegerTypes.cpp
+++ b/lib/CodeGen/SelectionDAG/LegalizeIntegerTypes.cpp
@@ -1362,7 +1362,7 @@ ExpandShiftWithKnownAmountBit(SDNode *N, SDValue &Lo, SDValue &Hi) {
 
   APInt HighBitMask = APInt::getHighBitsSet(ShBits, ShBits - Log2_32(NVTBits));
   APInt KnownZero, KnownOne;
-  DAG.ComputeMaskedBits(N->getOperand(1), HighBitMask, KnownZero, KnownOne);
+  DAG.ComputeMaskedBits(N->getOperand(1), KnownZero, KnownOne);
 
   // If we don't know anything about the high bits, exit.
   if (((KnownZero|KnownOne) & HighBitMask) == 0)