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Reduce duplicated hash map lookups.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@162362 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Benjamin Kramer
2012-08-22 15:37:57 +00:00
parent fdeb9fe5e0
commit 05d96f98cb
7 changed files with 20 additions and 23 deletions
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lib/Analysis/LoopInfo.cpp
+4 -5
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@@ -429,8 +429,8 @@ void UnloopUpdater::updateSubloopParents() {
Unloop->removeChildLoop(llvm::prior(Unloop->end()));
assert(SubloopParents.count(Subloop) && "DFS failed to visit subloop");
if (SubloopParents[Subloop])
SubloopParents[Subloop]->addChildLoop(Subloop);
if (Loop *Parent = SubloopParents[Subloop])
Parent->addChildLoop(Subloop);
else
LI->addTopLevelLoop(Subloop);
}
@@ -456,9 +456,8 @@ Loop *UnloopUpdater::getNearestLoop(BasicBlock *BB, Loop *BBLoop) {
assert(Subloop && "subloop is not an ancestor of the original loop");
}
// Get the current nearest parent of the Subloop exits, initially Unloop.
if (!SubloopParents.count(Subloop))
SubloopParents[Subloop] = Unloop;
NearLoop = SubloopParents[Subloop];
NearLoop =
SubloopParents.insert(std::make_pair(Subloop, Unloop)).first->second;
}
succ_iterator I = succ_begin(BB), E = succ_end(BB);