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When building local graphs, clone the initializer for constant globals into each

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local graph that uses the global.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11850 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2004-02-25 23:31:02 +00:00
parent e3fcabe068
commit c420ab6c25
1 changed files with 21 additions and 7 deletions
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28
lib/Analysis/DataStructure/Local.cpp
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@ -177,6 +177,18 @@ DSGraph::DSGraph(const TargetData &td, Function &F, DSGraph *GG)
else else
++I; ++I;
// If there are any constant globals referenced in this function, merge their
// initializers into the local graph from the globals graph.
if (ScalarMap.global_begin() != ScalarMap.global_end()) {
ReachabilityCloner RC(*this, *GG, 0);
for (DSScalarMap::global_iterator I = ScalarMap.global_begin();
I != ScalarMap.global_end(); ++I)
if (GlobalVariable *GV = dyn_cast<GlobalVariable>(*I))
if (GV->isConstant())
RC.merge(ScalarMap[GV], GG->ScalarMap[GV]);
}
markIncompleteNodes(DSGraph::MarkFormalArgs); markIncompleteNodes(DSGraph::MarkFormalArgs);
// Remove any nodes made dead due to merging... // Remove any nodes made dead due to merging...
@ -894,18 +906,20 @@ bool LocalDataStructures::run(Module &M) {
const TargetData &TD = getAnalysis<TargetData>(); const TargetData &TD = getAnalysis<TargetData>();
{
GraphBuilder GGB(*GlobalsGraph);
// Add initializers for all of the globals to the globals graph...
for (Module::giterator I = M.gbegin(), E = M.gend(); I != E; ++I)
if (!I->isExternal())
GGB.mergeInGlobalInitializer(I);
}
// Calculate all of the graphs... // Calculate all of the graphs...
for (Module::iterator I = M.begin(), E = M.end(); I != E; ++I) for (Module::iterator I = M.begin(), E = M.end(); I != E; ++I)
if (!I->isExternal()) if (!I->isExternal())
DSInfo.insert(std::make_pair(I, new DSGraph(TD, *I, GlobalsGraph))); DSInfo.insert(std::make_pair(I, new DSGraph(TD, *I, GlobalsGraph)));
GraphBuilder GGB(*GlobalsGraph);
// Add initializers for all of the globals to the globals graph...
for (Module::giterator I = M.gbegin(), E = M.gend(); I != E; ++I)
if (!I->isExternal())
GGB.mergeInGlobalInitializer(I);
GlobalsGraph->removeTriviallyDeadNodes(); GlobalsGraph->removeTriviallyDeadNodes();
GlobalsGraph->markIncompleteNodes(DSGraph::MarkFormalArgs); GlobalsGraph->markIncompleteNodes(DSGraph::MarkFormalArgs);
return false; return false;