bool SRETPromotion::runOnSCC(CallGraphSCC &SCC) {
bool Changed = false;
for (CallGraphSCC::iterator I = SCC.begin(), E = SCC.end(); I != E; ++I)
if (CallGraphNode *NewNode = PromoteReturn(*I)) {
SCC.ReplaceNode(*I, NewNode);
Changed = true;
}
return Changed;
}
bool ArgPromotion::runOnSCC(CallGraphSCC &SCC) {
if (skipSCC(SCC))
return false;
// Get the callgraph information that we need to update to reflect our
// changes.
CallGraph &CG = getAnalysis<CallGraphWrapperPass>().getCallGraph();
LegacyAARGetter AARGetter(*this);
bool Changed = false, LocalChange;
// Iterate until we stop promoting from this SCC.
do {
LocalChange = false;
// Attempt to promote arguments from all functions in this SCC.
for (CallGraphNode *OldNode : SCC) {
Function *OldF = OldNode->getFunction();
if (!OldF)
continue;
auto ReplaceCallSite = [&](CallSite OldCS, CallSite NewCS) {
Function *Caller = OldCS.getInstruction()->getParent()->getParent();
CallGraphNode *NewCalleeNode =
CG.getOrInsertFunction(NewCS.getCalledFunction());
CallGraphNode *CallerNode = CG[Caller];
CallerNode->replaceCallEdge(OldCS, NewCS, NewCalleeNode);
};
if (Function *NewF = promoteArguments(OldF, AARGetter, MaxElements,
{ReplaceCallSite})) {
LocalChange = true;
// Update the call graph for the newly promoted function.
CallGraphNode *NewNode = CG.getOrInsertFunction(NewF);
NewNode->stealCalledFunctionsFrom(OldNode);
if (OldNode->getNumReferences() == 0)
delete CG.removeFunctionFromModule(OldNode);
else
OldF->setLinkage(Function::ExternalLinkage);
// And updat ethe SCC we're iterating as well.
SCC.ReplaceNode(OldNode, NewNode);
}
}
// Remember that we changed something.
Changed |= LocalChange;
} while (LocalChange);
return Changed;
}
bool ArgPromotion::runOnSCC(CallGraphSCC &SCC) {
bool Changed = false, LocalChange;
do { // Iterate until we stop promoting from this SCC.
LocalChange = false;
// Attempt to promote arguments from all functions in this SCC.
for (CallGraphSCC::iterator I = SCC.begin(), E = SCC.end(); I != E; ++I) {
if (CallGraphNode *CGN = PromoteArguments(*I)) {
LocalChange = true;
SCC.ReplaceNode(*I, CGN);
}
}
Changed |= LocalChange; // Remember that we changed something.
} while (LocalChange);
return Changed;
}
bool ArgPromotion::runOnSCC(CallGraphSCC &SCC) {
bool Changed = false, LocalChange;
DataLayoutPass *DLP = getAnalysisIfAvailable<DataLayoutPass>();
DL = DLP ? &DLP->getDataLayout() : nullptr;
do { // Iterate until we stop promoting from this SCC.
LocalChange = false;
// Attempt to promote arguments from all functions in this SCC.
for (CallGraphSCC::iterator I = SCC.begin(), E = SCC.end(); I != E; ++I) {
if (CallGraphNode *CGN = PromoteArguments(*I)) {
LocalChange = true;
SCC.ReplaceNode(*I, CGN);
}
}
Changed |= LocalChange; // Remember that we changed something.
} while (LocalChange);
return Changed;
}
static bool runImpl(CallGraphSCC &SCC, CallGraph &CG,
function_ref<AAResults &(Function &F)> AARGetter,
unsigned MaxElements) {
bool Changed = false, LocalChange;
do { // Iterate until we stop promoting from this SCC.
LocalChange = false;
// Attempt to promote arguments from all functions in this SCC.
for (CallGraphNode *OldNode : SCC) {
if (CallGraphNode *NewNode =
PromoteArguments(OldNode, CG, AARGetter, MaxElements)) {
LocalChange = true;
SCC.ReplaceNode(OldNode, NewNode);
}
}
Changed |= LocalChange; // Remember that we changed something.
} while (LocalChange);
return Changed;
}
