make sure to remove a node from the use list of its operands when we replace
it.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22820 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/include/llvm/CodeGen/SelectionDAGNodes.h b/include/llvm/CodeGen/SelectionDAGNodes.h
index 00b9403..930a163 100644
--- a/include/llvm/CodeGen/SelectionDAGNodes.h
+++ b/include/llvm/CodeGen/SelectionDAGNodes.h
@@ -614,7 +614,14 @@
void MorphNodeTo(unsigned Opc) {
NodeType = Opc;
Values.clear();
- Operands.clear();
+
+ // Clear the operands list, updating used nodes to remove this from their
+ // use list.
+ while (!Operands.empty()) {
+ SDNode *O = Operands.back().Val;
+ Operands.pop_back();
+ O->removeUser(this);
+ }
}
void setValueTypes(MVT::ValueType VT) {