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* Don't predefine ReversePostOrderTraversal because it adds a dependence on vector

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* static ctor/dtor is actually a REALLY good idea
* Remove explicit copy ctor and op=


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@480 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2001-09-07 21:02:14 +00:00
parent fd84023f5f
commit 12a16341f6
1 changed files with 27 additions and 13 deletions
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40
include/llvm/CFG.h
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@ -391,6 +391,7 @@ class POIterator : public std::forward_iterator<BBType, ptrdiff_t> {
}
}
}
public:
typedef POIterator<BBType, SuccItTy> _Self;
@ -400,18 +401,6 @@ public:
traverseChild();
}
inline POIterator() { /* End is when stack is empty */ }
#if 0
inline POIterator(const _Self& x)
: Visited(x.Visited), VisitStack(x.VisitStack) {
}
inline POIterator& operator=(const _Self& x) {
Visited = x.Visited;
VisitStack = x.VisitStack;
return *this;
}
#endif
inline bool operator==(const _Self& x) const {
return VisitStack == x.VisitStack;
@ -438,6 +427,10 @@ public:
inline _Self operator++(int) { // Postincrement
_Self tmp = *this; ++*this; return tmp;
}
// Provide default begin and end methods when nothing special is needed.
static inline _Self begin (BBType *BB) { return _Self(BB); }
static inline _Self end (BBType *BB) { return _Self(); }
};
inline po_iterator po_begin( Method *M) {
@ -467,9 +460,30 @@ inline po_const_iterator po_end (const BasicBlock *BB) {
}
//===----------------------------------------------------------------------===//
//===--------------------------------------------------------------------===//
// Reverse Post Order CFG iterator code
//===--------------------------------------------------------------------===//
//
// This is used to visit basic blocks in a method in reverse post order. This
// class is awkward to use because I don't know a good incremental algorithm to
// computer RPO from a graph. Because of this, the construction of the
// ReversePostOrderTraversal object is expensive (it must walk the entire graph
// with a postorder iterator to build the data structures). The moral of this
// story is: Don't create more ReversePostOrderTraversal classes than neccesary.
//
// This class should be used like this:
// {
// cfg::ReversePostOrderTraversal RPOT(MethodPtr); // Expensive to create
// for (cfg::rpo_iterator I = RPOT.begin(); I != RPOT.end(); ++I) {
// ...
// }
// for (cfg::rpo_iterator I = RPOT.begin(); I != RPOT.end(); ++I) {
// ...
// }
// }
//
typedef reverse_iterator<vector<BasicBlock*>::iterator> rpo_iterator;
class ReversePostOrderTraversal {
vector<BasicBlock*> Blocks; // Block list in normal PO order