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fix 255.vortex again, third time's the charm.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90217 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2009-12-01 07:33:32 +00:00
parent 49f5389aae
commit 855d9da596
1 changed files with 35 additions and 2 deletions
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37
lib/Analysis/MemoryDependenceAnalysis.cpp
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@ -1156,8 +1156,41 @@ getNonLocalPointerDepFromBB(Value *Pointer, uint64_t PointeeSize,
// that predecessor. We can still do PRE of the load, which would insert
// a computation of the pointer in this predecessor.
if (PredPtr == 0) {
Result.push_back(NonLocalDepEntry(Pred,
MemDepResult::getClobber(Pred->getTerminator())));
// Add the entry to the Result list.
NonLocalDepEntry Entry(Pred,
MemDepResult::getClobber(Pred->getTerminator()));
Result.push_back(Entry);
// Add it to the cache for this CacheKey so that subsequent queries get
// this result.
Cache = &NonLocalPointerDeps[CacheKey].second;
MemoryDependenceAnalysis::NonLocalDepInfo::iterator It =
std::upper_bound(Cache->begin(), Cache->end(), Entry);
if (It != Cache->begin() && prior(It)->first == Pred)
--It;
if (It == Cache->end() || It->first != Pred) {
Cache->insert(It, Entry);
// Add it to the reverse map.
ReverseNonLocalPtrDeps[Pred->getTerminator()].insert(CacheKey);
} else if (!It->second.isDirty()) {
// noop
} else if (It->second.getInst() == Pred->getTerminator()) {
// Same instruction, clear the dirty marker.
It->second = Entry.second;
} else if (It->second.getInst() == 0) {
// Dirty, with no instruction, just add this.
It->second = Entry.second;
ReverseNonLocalPtrDeps[Pred->getTerminator()].insert(CacheKey);
} else {
// Otherwise, dirty with a different instruction.
RemoveFromReverseMap(ReverseNonLocalPtrDeps, It->second.getInst(),
CacheKey);
It->second = Entry.second;
ReverseNonLocalPtrDeps[Pred->getTerminator()].insert(CacheKey);
}
Cache = 0;
continue;
}