Fix an infinite loop I caused by making sure to legalize the flag operand
of CALLSEQ_* nodes
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@25582 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/SelectionDAG/SelectionDAG.cpp b/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
index c1ba5eb..ed96bd6 100644
--- a/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
+++ b/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
@@ -1276,6 +1276,19 @@
OperandList[0].Val->Uses.push_back(this);
}
+// setAdjCallFlag - This method changes the flag input of an
+// CALLSEQ_START/END node to be the specified operand.
+void SDNode::setAdjCallFlag(SDOperand N) {
+ assert(N.getValueType() == MVT::Flag);
+ assert((getOpcode() == ISD::CALLSEQ_START ||
+ getOpcode() == ISD::CALLSEQ_END) && "Cannot adjust this node!");
+
+ SDOperand &FlagOp = OperandList[getNumOperands()-1];
+ assert(FlagOp.getValueType() == MVT::Flag);
+ FlagOp.Val->removeUser(this);
+ FlagOp = N;
+ FlagOp.Val->Uses.push_back(this);
+}
SDOperand SelectionDAG::getLoad(MVT::ValueType VT,