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-rw-r--r--lib/CodeGen/SelectionDAG/LegalizeDAG.cpp7
1 files changed, 4 insertions, 3 deletions
diff --git a/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp b/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
index 63f58c2096..a5146bd452 100644
--- a/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
+++ b/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
@@ -551,9 +551,10 @@ SDOperand ExpandFCOPYSIGNToBitwiseOps(SDNode *Node, MVT::ValueType NVT,
}
-/// LegalizeOp - We know that the specified value has a legal type.
-/// Recursively ensure that the operands have legal types, then return the
-/// result.
+/// LegalizeOp - We know that the specified value has a legal type, and
+/// that its operands are legal. Now ensure that the operation itself
+/// is legal, recursively ensuring that the operands' operations remain
+/// legal.
SDOperand SelectionDAGLegalize::LegalizeOp(SDOperand Op) {
assert(isTypeLegal(Op.getValueType()) &&
"Caller should expand or promote operands that are not legal!");