[llvm-commits] [llvm] r45063 - in /llvm/trunk/include/llvm/ADT: DepthFirstIterator.h GraphTraits.h
Anton Korobeynikov
asl at math.spbu.ru
Sat Dec 15 14:23:25 PST 2007
Author: asl
Date: Sat Dec 15 16:23:24 2007
New Revision: 45063
URL: http://llvm.org/viewvc/llvm-project?rev=45063&view=rev
Log:
Use references in DF iterators. This eliminates copy-ctor calls on huge objects (graphs)
Modified:
llvm/trunk/include/llvm/ADT/DepthFirstIterator.h
llvm/trunk/include/llvm/ADT/GraphTraits.h
Modified: llvm/trunk/include/llvm/ADT/DepthFirstIterator.h
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/include/llvm/ADT/DepthFirstIterator.h?rev=45063&r1=45062&r2=45063&view=diff
==============================================================================
--- llvm/trunk/include/llvm/ADT/DepthFirstIterator.h (original)
+++ llvm/trunk/include/llvm/ADT/DepthFirstIterator.h Sat Dec 15 16:23:24 2007
@@ -96,16 +96,16 @@
typedef df_iterator<GraphT, SetType, ExtStorage, GT> _Self;
// Provide static begin and end methods as our public "constructors"
- static inline _Self begin(GraphT G) {
+ static inline _Self begin(const GraphT& G) {
return _Self(GT::getEntryNode(G));
}
- static inline _Self end(GraphT G) { return _Self(); }
+ static inline _Self end(const GraphT& G) { return _Self(); }
// Static begin and end methods as our public ctors for external iterators
- static inline _Self begin(GraphT G, SetType &S) {
+ static inline _Self begin(const GraphT& G, SetType &S) {
return _Self(GT::getEntryNode(G), S);
}
- static inline _Self end(GraphT G, SetType &S) { return _Self(S); }
+ static inline _Self end(const GraphT& G, SetType &S) { return _Self(S); }
inline bool operator==(const _Self& x) const {
return VisitStack.size() == x.VisitStack.size() &&
@@ -162,12 +162,12 @@
// Provide global constructors that automatically figure out correct types...
//
template <class T>
-df_iterator<T> df_begin(T G) {
+df_iterator<T> df_begin(const T& G) {
return df_iterator<T>::begin(G);
}
template <class T>
-df_iterator<T> df_end(T G) {
+df_iterator<T> df_end(const T& G) {
return df_iterator<T>::end(G);
}
@@ -179,12 +179,12 @@
};
template <class T, class SetTy>
-df_ext_iterator<T, SetTy> df_ext_begin(T G, SetTy &S) {
+df_ext_iterator<T, SetTy> df_ext_begin(const T& G, SetTy &S) {
return df_ext_iterator<T, SetTy>::begin(G, S);
}
template <class T, class SetTy>
-df_ext_iterator<T, SetTy> df_ext_end(T G, SetTy &S) {
+df_ext_iterator<T, SetTy> df_ext_end(const T& G, SetTy &S) {
return df_ext_iterator<T, SetTy>::end(G, S);
}
@@ -199,13 +199,15 @@
};
template <class T>
-idf_iterator<T> idf_begin(T G) {
- return idf_iterator<T>::begin(G);
+idf_iterator<T> idf_begin(const T& G) {
+ Inverse<T> DummyG;
+ return idf_iterator<T>::begin(DummyG);
}
template <class T>
-idf_iterator<T> idf_end(T G){
- return idf_iterator<T>::end(G);
+idf_iterator<T> idf_end(const T& G){
+ Inverse<T> DummyG;
+ return idf_iterator<T>::end(DummyG);
}
// Provide global definitions of external inverse depth first iterators...
@@ -218,13 +220,15 @@
};
template <class T, class SetTy>
-idf_ext_iterator<T, SetTy> idf_ext_begin(T G, SetTy &S) {
- return idf_ext_iterator<T, SetTy>::begin(G, S);
+idf_ext_iterator<T, SetTy> idf_ext_begin(const T& G, SetTy &S) {
+ Inverse<T> DummyG(G);
+ return idf_ext_iterator<T, SetTy>::begin(DummyG, S);
}
template <class T, class SetTy>
-idf_ext_iterator<T, SetTy> idf_ext_end(T G, SetTy &S) {
- return idf_ext_iterator<T, SetTy>::end(G, S);
+idf_ext_iterator<T, SetTy> idf_ext_end(const T& G, SetTy &S) {
+ Inverse<T> DummyG(G);
+ return idf_ext_iterator<T, SetTy>::end(DummyG, S);
}
} // End llvm namespace
Modified: llvm/trunk/include/llvm/ADT/GraphTraits.h
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/include/llvm/ADT/GraphTraits.h?rev=45063&r1=45062&r2=45063&view=diff
==============================================================================
--- llvm/trunk/include/llvm/ADT/GraphTraits.h (original)
+++ llvm/trunk/include/llvm/ADT/GraphTraits.h Sat Dec 15 16:23:24 2007
@@ -73,9 +73,9 @@
//
template <class GraphType>
struct Inverse {
- GraphType &Graph;
+ const GraphType &Graph;
- inline Inverse(GraphType &G) : Graph(G) {}
+ inline Inverse(const GraphType &G) : Graph(G) {}
};
// Provide a partial specialization of GraphTraits so that the inverse of an inverse
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