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Templatize graph traits and iterator to work with const and non-const clients

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@4746 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2002-11-18 21:42:19 +00:00
parent 9850237536
commit c59a1ba33b
2 changed files with 54 additions and 14 deletions
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34
include/llvm/Analysis/DSGraphTraits.h
View File

@ -14,15 +14,16 @@
#include "Support/iterator"
#include "Support/STLExtras.h"
template<typename NodeTy>
class DSNodeIterator : public forward_iterator<const DSNode, ptrdiff_t> {
friend class DSNode;
const DSNode * const Node;
NodeTy * const Node;
unsigned Offset;
typedef DSNodeIterator _Self;
typedef DSNodeIterator<NodeTy> _Self;
DSNodeIterator(const DSNode *N) : Node(N), Offset(0) {} // begin iterator
DSNodeIterator(const DSNode *N, bool) // Create end iterator
DSNodeIterator(NodeTy *N) : Node(N), Offset(0) {} // begin iterator
DSNodeIterator(NodeTy *N, bool) // Create end iterator
: Node(N) {
Offset = (N->getSize()+((1 << DS::PointerShift)-1)) &
~((1 << DS::PointerShift)-1);
@ -60,8 +61,18 @@ public:
};
// Provide iterators for DSNode...
inline DSNode::iterator DSNode::begin() const { return DSNodeIterator(this); }
inline DSNode::iterator DSNode::end() const { return DSNodeIterator(this, false); }
inline DSNode::iterator DSNode::begin() {
return DSNode::iterator(this);
}
inline DSNode::iterator DSNode::end() {
return DSNode::iterator(this, false);
}
inline DSNode::const_iterator DSNode::begin() const {
return DSNode::const_iterator(this);
}
inline DSNode::const_iterator DSNode::end() const {
return DSNode::const_iterator(this, false);
}
template <> struct GraphTraits<DSNode*> {
typedef DSNode NodeType;
@ -72,6 +83,15 @@ template <> struct GraphTraits<DSNode*> {
static ChildIteratorType child_end(NodeType *N) { return N->end(); }
};
template <> struct GraphTraits<const DSNode*> {
typedef const DSNode NodeType;
typedef DSNode::const_iterator ChildIteratorType;
static NodeType *getEntryNode(NodeType *N) { return N; }
static ChildIteratorType child_begin(NodeType *N) { return N->begin(); }
static ChildIteratorType child_end(NodeType *N) { return N->end(); }
};
static DSNode &dereference ( DSNode *N) { return *N; }
static const DSNode &dereferenceC(const DSNode *N) { return *N; }
@ -97,7 +117,7 @@ template <> struct GraphTraits<DSGraph*> {
template <> struct GraphTraits<const DSGraph*> {
typedef const DSNode NodeType;
typedef DSNode::iterator ChildIteratorType;
typedef DSNode::const_iterator ChildIteratorType;
typedef std::pointer_to_unary_function<const DSNode *,const DSNode&> DerefFun;

34
include/llvm/Analysis/DataStructure/DSGraphTraits.h
View File

@ -14,15 +14,16 @@
#include "Support/iterator"
#include "Support/STLExtras.h"
template<typename NodeTy>
class DSNodeIterator : public forward_iterator<const DSNode, ptrdiff_t> {
friend class DSNode;
const DSNode * const Node;
NodeTy * const Node;
unsigned Offset;
typedef DSNodeIterator _Self;
typedef DSNodeIterator<NodeTy> _Self;
DSNodeIterator(const DSNode *N) : Node(N), Offset(0) {} // begin iterator
DSNodeIterator(const DSNode *N, bool) // Create end iterator
DSNodeIterator(NodeTy *N) : Node(N), Offset(0) {} // begin iterator
DSNodeIterator(NodeTy *N, bool) // Create end iterator
: Node(N) {
Offset = (N->getSize()+((1 << DS::PointerShift)-1)) &
~((1 << DS::PointerShift)-1);
@ -60,8 +61,18 @@ public:
};
// Provide iterators for DSNode...
inline DSNode::iterator DSNode::begin() const { return DSNodeIterator(this); }
inline DSNode::iterator DSNode::end() const { return DSNodeIterator(this, false); }
inline DSNode::iterator DSNode::begin() {
return DSNode::iterator(this);
}
inline DSNode::iterator DSNode::end() {
return DSNode::iterator(this, false);
}
inline DSNode::const_iterator DSNode::begin() const {
return DSNode::const_iterator(this);
}
inline DSNode::const_iterator DSNode::end() const {
return DSNode::const_iterator(this, false);
}
template <> struct GraphTraits<DSNode*> {
typedef DSNode NodeType;
@ -72,6 +83,15 @@ template <> struct GraphTraits<DSNode*> {
static ChildIteratorType child_end(NodeType *N) { return N->end(); }
};
template <> struct GraphTraits<const DSNode*> {
typedef const DSNode NodeType;
typedef DSNode::const_iterator ChildIteratorType;
static NodeType *getEntryNode(NodeType *N) { return N; }
static ChildIteratorType child_begin(NodeType *N) { return N->begin(); }
static ChildIteratorType child_end(NodeType *N) { return N->end(); }
};
static DSNode &dereference ( DSNode *N) { return *N; }
static const DSNode &dereferenceC(const DSNode *N) { return *N; }
@ -97,7 +117,7 @@ template <> struct GraphTraits<DSGraph*> {
template <> struct GraphTraits<const DSGraph*> {
typedef const DSNode NodeType;
typedef DSNode::iterator ChildIteratorType;
typedef DSNode::const_iterator ChildIteratorType;
typedef std::pointer_to_unary_function<const DSNode *,const DSNode&> DerefFun;