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Remove more long dead code: dsa doesn't provide must alias info

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llvm-svn: 20870
This commit is contained in:
Chris Lattner 2005-03-26 22:54:46 +00:00
parent 8638fbf4d6
commit 21d25dd835
1 changed files with 0 additions and 32 deletions
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32
lib/Analysis/DataStructure/DataStructureAA.cpp
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@ -56,8 +56,6 @@ namespace {
AliasResult alias(const Value *V1, unsigned V1Size, AliasResult alias(const Value *V1, unsigned V1Size,
const Value *V2, unsigned V2Size); const Value *V2, unsigned V2Size);
void getMustAliases(Value *P, std::vector<Value*> &RetVals);
ModRefResult getModRefInfo(CallSite CS, Value *P, unsigned Size); ModRefResult getModRefInfo(CallSite CS, Value *P, unsigned Size);
ModRefResult getModRefInfo(CallSite CS1, CallSite CS2) { ModRefResult getModRefInfo(CallSite CS1, CallSite CS2) {
return AliasAnalysis::getModRefInfo(CS1,CS2); return AliasAnalysis::getModRefInfo(CS1,CS2);
@ -245,33 +243,3 @@ DSAA::getModRefInfo(CallSite CS, Value *P, unsigned Size) {
return Result; return Result;
} }
/// getMustAliases - If there are any pointers known that must alias this
/// pointer, return them now. This allows alias-set based alias analyses to
/// perform a form a value numbering (which is exposed by load-vn). If an alias
/// analysis supports this, it should ADD any must aliased pointers to the
/// specified vector.
///
void DSAA::getMustAliases(Value *P, std::vector<Value*> &RetVals) {
#if 0 // This does not correctly handle arrays!
// Currently the only must alias information we can provide is to say that
// something is equal to a global value. If we already have a global value,
// don't get worked up about it.
if (!isa<GlobalValue>(P)) {
DSGraph *G = getGraphForValue(P);
if (!G) G = &TD->getGlobalsGraph();
// The only must alias information we can currently determine occurs when
// the node for P is a global node with only one entry.
DSGraph::ScalarMapTy::const_iterator I = G->getScalarMap().find(P);
if (I != G->getScalarMap().end()) {
DSNode *N = I->second.getNode();
if (N->isComplete() && isSinglePhysicalObject(N))
RetVals.push_back(N->getGlobals()[0]);
}
}
#endif
return AliasAnalysis::getMustAliases(P, RetVals);
}