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Fix the "partial pool allocator" on em3d and others. The problem is that 

DSNodes, unlike other GraphTraits nodes, can have null outgoing edges, and
df_iterator doesn't take this into consideration.  As a workaround, the
successor iterator now handles null nodes and 'indicates' that null has
no successors.

llvm-svn: 12025
This commit is contained in:
Chris Lattner 2004-03-01 01:42:26 +00:00
parent b4c203ce67
commit 482cf01a1e
1 changed files with 8 additions and 4 deletions
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12
llvm/include/llvm/Analysis/DSGraphTraits.h
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@ -33,10 +33,14 @@ class DSNodeIterator : public forward_iterator<const DSNode, ptrdiff_t> {
DSNodeIterator(NodeTy *N) : Node(N), Offset(0) {} // begin iterator DSNodeIterator(NodeTy *N) : Node(N), Offset(0) {} // begin iterator
DSNodeIterator(NodeTy *N, bool) : Node(N) { // Create end iterator DSNodeIterator(NodeTy *N, bool) : Node(N) { // Create end iterator
Offset = N->getNumLinks() << DS::PointerShift; if (N != 0) {
if (Offset == 0 && Node->getForwardNode() && Offset = N->getNumLinks() << DS::PointerShift;
Node->isDeadNode()) // Model Forward link if (Offset == 0 && Node->getForwardNode() &&
Offset += DS::PointerSize; Node->isDeadNode()) // Model Forward link
Offset += DS::PointerSize;
} else {
Offset = 0;
}
} }
public: public:
DSNodeIterator(const DSNodeHandle &NH) DSNodeIterator(const DSNodeHandle &NH)