Provide an interface to transfer SDDbgValue from one SDNode to another.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@124245 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/include/llvm/CodeGen/SelectionDAG.h b/include/llvm/CodeGen/SelectionDAG.h
index 4f8e98b..136bdd5 100644
--- a/include/llvm/CodeGen/SelectionDAG.h
+++ b/include/llvm/CodeGen/SelectionDAG.h
@@ -100,6 +100,10 @@
return DbgValMap[Node];
}
+ void removeSDDbgValues(const SDNode *Node) {
+ DbgValMap.erase(Node);
+ }
+
typedef SmallVector<SDDbgValue*,32>::iterator DbgIterator;
DbgIterator DbgBegin() { return DbgValues.begin(); }
DbgIterator DbgEnd() { return DbgValues.end(); }
@@ -901,6 +905,9 @@
SmallVector<SDDbgValue*,2> &GetDbgValues(const SDNode* SD) {
return DbgInfo->getSDDbgValues(SD);
}
+
+ /// TransferDbgValues - Transfer SDDbgValues.
+ void TransferDbgValues(SDValue From, SDValue To);
/// hasDebugValues - Return true if there are any SDDbgValue nodes associated
/// with this SelectionDAG.
diff --git a/lib/CodeGen/SelectionDAG/SDNodeDbgValue.h b/lib/CodeGen/SelectionDAG/SDNodeDbgValue.h
index 2dcb229..e5cd23a 100644
--- a/lib/CodeGen/SelectionDAG/SDNodeDbgValue.h
+++ b/lib/CodeGen/SelectionDAG/SDNodeDbgValue.h
@@ -83,6 +83,14 @@
// Returns the SDNode* for a register ref
SDNode *getSDNode() { assert (kind==SDNODE); return u.s.Node; }
+ // setSDNode - If underlying SDNode is replaced by another node then
+ // SelectionDAG can use this to transfer DbgValue.
+ void setSDNode(SDNode *N, unsigned R) {
+ assert (kind==SDNODE);
+ u.s.Node = N;
+ u.s.ResNo = R;
+ }
+
// Returns the ResNo for a register ref
unsigned getResNo() { assert (kind==SDNODE); return u.s.ResNo; }
diff --git a/lib/CodeGen/SelectionDAG/SelectionDAG.cpp b/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
index f6aea1f..e751e22 100644
--- a/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
+++ b/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
@@ -5424,6 +5424,23 @@
SD->setHasDebugValue(true);
}
+/// TransferDbgValues - Transfer SDDbgValues.
+void SelectionDAG::TransferDbgValues(SDValue From, SDValue To) {
+ if (From == To || !From.getNode()->getHasDebugValue())
+ return;
+ SDNode *FromNode = From.getNode();
+ SDNode *ToNode = To.getNode();
+ SmallVector<SDDbgValue*,2> &DVs = GetDbgValues(FromNode);
+ DbgInfo->removeSDDbgValues(FromNode);
+ for (SmallVector<SDDbgValue *, 2>::iterator I = DVs.begin(), E = DVs.end();
+ I != E; ++I) {
+ if ((*I)->getKind() == SDDbgValue::SDNODE) {
+ AddDbgValue(*I, ToNode, false);
+ (*I)->setSDNode(ToNode, To.getResNo());
+ }
+ }
+}
+
//===----------------------------------------------------------------------===//
// SDNode Class
//===----------------------------------------------------------------------===//