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Simplify code. No functionality change.

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Using DenseMap iterators isn't free as they have to check for empty
buckets. Dominator queries are common so this gives a minor speedup.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@147544 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Benjamin Kramer 2012-01-04 20:20:08 +00:00
parent 8a86887ba3
commit 34b5f0437b
1 changed files with 4 additions and 7 deletions
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11
include/llvm/Analysis/Dominators.h
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@ -321,8 +321,7 @@ public:
/// block. This is the same as using operator[] on this class.
///
inline DomTreeNodeBase<NodeT> *getNode(NodeT *BB) const {
typename DomTreeNodeMapType::const_iterator I = DomTreeNodes.find(BB);
return I != DomTreeNodes.end() ? I->second : 0;
return DomTreeNodes.lookup(BB);
}
/// getRootNode - This returns the entry node for the CFG of the function. If
@ -623,9 +622,8 @@ protected:
}
DomTreeNodeBase<NodeT> *getNodeForBlock(NodeT *BB) {
typename DomTreeNodeMapType::iterator I = this->DomTreeNodes.find(BB);
if (I != this->DomTreeNodes.end() && I->second)
return I->second;
if (DomTreeNodeBase<NodeT> *Node = getNode(BB))
return Node;
// Haven't calculated this node yet? Get or calculate the node for the
// immediate dominator.
@ -641,8 +639,7 @@ protected:
}
inline NodeT *getIDom(NodeT *BB) const {
typename DenseMap<NodeT*, NodeT*>::const_iterator I = IDoms.find(BB);
return I != IDoms.end() ? I->second : 0;
return IDoms.lookup(BB);
}
inline void addRoot(NodeT* BB) {