#include "llvm/Analysis/DSSupport.h"
+namespace llvm {
+
template<typename BaseType>
class DSNodeIterator; // Data structure graph traversal iterator
class TargetData;
/// null.
DSNodeHandle ForwardNH;
+ /// Next, Prev - These instance variables are used to keep the node on a
+ /// doubly-linked ilist in the DSGraph.
+ DSNode *Next, *Prev;
+ friend class ilist_traits<DSNode>;
+
/// Size - The current size of the node. This should be equal to the size of
/// the current type record.
///
private:
unsigned short NodeType;
public:
-
+
+ /// DSNode ctor - Create a node of the specified type, inserting it into the
+ /// specified graph.
DSNode(const Type *T, DSGraph *G);
- DSNode(const DSNode &, DSGraph *G);
+
+ /// DSNode "copy ctor" - Copy the specified node, inserting it into the
+ /// specified graph. If NullLinks is true, then null out all of the links,
+ /// but keep the same number of them. This can be used for efficiency if the
+ /// links are just going to be clobbered anyway.
+ DSNode(const DSNode &, DSGraph *G, bool NullLinks = false);
~DSNode() {
dropAllReferences();
/// getForwardNode - This method returns the node that this node is forwarded
/// to, if any.
DSNode *getForwardNode() const { return ForwardNH.getNode(); }
+
+ /// isForwarding - Return true if this node is forwarding to another.
+ ///
+ bool isForwarding() const { return !ForwardNH.isNull(); }
+
+ /// stopForwarding - When the last reference to this forwarding node has been
+ /// dropped, delete the node.
void stopForwarding() {
- assert(!ForwardNH.isNull() &&
+ assert(isForwarding() &&
"Node isn't forwarding, cannot stopForwarding!");
ForwardNH.setNode(0);
+ assert(ParentGraph == 0 &&
+ "Forwarding nodes must have been removed from graph!");
+ delete this;
}
/// hasLink - Return true if this memory object has a link in slot #LinkNo
/// also marks the node with the 'G' flag if it does not already have it.
///
void addGlobal(GlobalValue *GV);
+ void mergeGlobals(const std::vector<GlobalValue*> &RHS);
const std::vector<GlobalValue*> &getGlobals() const { return Globals; }
+ typedef std::vector<GlobalValue*>::const_iterator global_iterator;
+ global_iterator global_begin() const { return Globals.begin(); }
+ global_iterator global_end() const { return Globals.end(); }
+
+
/// maskNodeTypes - Apply a mask to the node types bitfield.
///
void maskNodeTypes(unsigned Mask) {
NodeType &= Mask;
}
+ void mergeNodeFlags(unsigned RHS) {
+ NodeType |= RHS;
+ }
+
/// getNodeFlags - Return all of the flags set on the node. If the DEAD flag
/// is set, hide it from the caller.
unsigned getNodeFlags() const { return NodeType & ~DEAD; }
DSNode *setIncompleteMarker() { NodeType |= Incomplete; return this; }
DSNode *setModifiedMarker() { NodeType |= Modified; return this; }
DSNode *setReadMarker() { NodeType |= Read; return this; }
+ DSNode *setArrayMarker() { NodeType |= Array; return this; }
void makeNodeDead() {
Globals.clear();
void dropAllReferences() {
Links.clear();
- if (!ForwardNH.isNull())
+ if (isForwarding())
ForwardNH.setNode(0);
}
static void MergeNodes(DSNodeHandle& CurNodeH, DSNodeHandle& NH);
};
+//===----------------------------------------------------------------------===//
+// Define the ilist_traits specialization for the DSGraph ilist.
+//
+template<>
+struct ilist_traits<DSNode> {
+ static DSNode *getPrev(const DSNode *N) { return N->Prev; }
+ static DSNode *getNext(const DSNode *N) { return N->Next; }
+
+ static void setPrev(DSNode *N, DSNode *Prev) { N->Prev = Prev; }
+ static void setNext(DSNode *N, DSNode *Next) { N->Next = Next; }
+
+ static DSNode *createNode() { return new DSNode(0,0); }
+ //static DSNode *createNode(const DSNode &V) { return new DSNode(V); }
+
+
+ void addNodeToList(DSNode *NTy) {}
+ void removeNodeFromList(DSNode *NTy) {}
+ void transferNodesFromList(iplist<DSNode, ilist_traits> &L2,
+ ilist_iterator<DSNode> first,
+ ilist_iterator<DSNode> last) {}
+};
+
+template<>
+struct ilist_traits<const DSNode> : public ilist_traits<DSNode> {};
//===----------------------------------------------------------------------===//
// Define inline DSNodeHandle functions that depend on the definition of DSNode
//
inline DSNode *DSNodeHandle::getNode() const {
assert((!N || Offset < N->Size || (N->Size == 0 && Offset == 0) ||
- !N->ForwardNH.isNull()) && "Node handle offset out of range!");
- if (!N || N->ForwardNH.isNull())
+ N->isForwarding()) && "Node handle offset out of range!");
+ if (N == 0 || !N->isForwarding())
return N;
return HandleForwarding();
}
-inline void DSNodeHandle::setNode(DSNode *n) {
- assert(!n || !n->getForwardNode() && "Cannot set node to a forwarded node!");
- if (N) N->NumReferrers--;
+inline void DSNodeHandle::setNode(DSNode *n) const {
+ assert(!n || !n->isForwarding() && "Cannot set node to a forwarded node!");
+ if (N) getNode()->NumReferrers--;
N = n;
if (N) {
N->NumReferrers++;
}
assert(!N || ((N->NodeType & DSNode::DEAD) == 0));
assert((!N || Offset < N->Size || (N->Size == 0 && Offset == 0) ||
- !N->ForwardNH.isNull()) && "Node handle offset out of range!");
+ N->isForwarding()) && "Node handle offset out of range!");
}
inline bool DSNodeHandle::hasLink(unsigned Num) const {
/// mergeWith - Merge the logical node pointed to by 'this' with the node
/// pointed to by 'N'.
///
-inline void DSNodeHandle::mergeWith(const DSNodeHandle &Node) {
- if (N != 0)
+inline void DSNodeHandle::mergeWith(const DSNodeHandle &Node) const {
+ if (!isNull())
getNode()->mergeWith(Node, Offset);
- else // No node to merge with, so just point to Node
- *this = Node;
+ else { // No node to merge with, so just point to Node
+ Offset = 0;
+ setNode(Node.getNode());
+ Offset = Node.getOffset();
+ }
}
+} // End llvm namespace
+
#endif
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