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When making a clone of a DSGraph from the BU pass, make sure to remember that
this clone is supposed to be used for *ALL* of the functions in the SCC. This fixes the memory explosion problem the TD pass was having, reducing the memory growth from 24MB -> 3.5MB on povray and 270MB ->8.3MB on perlbmk! This obviously also speeds up the TD pass *a lot*. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@20763 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -105,8 +105,8 @@ bool TDDataStructures::runOnModule(Module &M) {
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for (Module::iterator I = M.begin(), E = M.end(); I != E; ++I)
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if (!I->isExternal())
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getOrCreateDSGraph(*I);
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return false;
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}
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//return false;
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#endif
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@ -154,6 +154,13 @@ DSGraph &TDDataStructures::getOrCreateDSGraph(Function &F) {
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assert(G->getAuxFunctionCalls().empty() && "Cloned aux calls?");
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G->setPrintAuxCalls();
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G->setGlobalsGraph(GlobalsGraph);
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// Note that this graph is the graph for ALL of the function in the SCC, not
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// just F.
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for (DSGraph::retnodes_iterator RI = G->retnodes_begin(),
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E = G->retnodes_end(); RI != E; ++RI)
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if (RI->first != &F)
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DSInfo[RI->first] = G;
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}
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return *G;
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}
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