[llvm-commits] CVS: llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp

[Chris Lattner]

Changes in directory llvm/lib/CodeGen/SelectionDAG:

LegalizeDAG.cpp updated: 1.42 -> 1.43
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Log message:

Zero is cheaper than sign extend.


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Diffs of the changes:  (+1 -1)

Index: llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
diff -u llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp:1.42 llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp:1.43
--- llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp:1.42	Tue Jan 18 13:27:06 2005
+++ llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp	Tue Jan 18 15:57:59 2005
@@ -793,7 +793,7 @@
       case ISD::SIGN_EXTEND:
         Result = PromoteOp(Node->getOperand(0));
         // NOTE: Any extend would work here...
-        Result = DAG.getNode(ISD::SIGN_EXTEND, Op.getValueType(), Result);
+        Result = DAG.getNode(ISD::ZERO_EXTEND, Op.getValueType(), Result);
         Result = DAG.getNode(ISD::SIGN_EXTEND_INREG, Result.getValueType(),
                              Result, Node->getOperand(0).getValueType());
         break;