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[RDF] Allow unlinking ref nodes from data-flow chains only 

llvm-svn: 258073
This commit is contained in:
Krzysztof Parzyszek 2016-01-18 20:41:34 +00:00
parent eb85b04c7e
commit 69e670d5f9
3 changed files with 23 additions and 14 deletions
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4
llvm/lib/Target/Hexagon/RDFDeadCode.cpp
View File

@ -183,9 +183,9 @@ bool DeadCodeElimination::erase(const SetVector<NodeId> &Nodes) {
if (trace())
dbgs() << " " << PrintNode<RefNode*>(RA, DFG) << '\n';
if (DFG.IsUse(RA))
DFG.unlinkUse(RA);
DFG.unlinkUse(RA, true);
else if (DFG.IsDef(RA))
DFG.unlinkDef(RA);
DFG.unlinkDef(RA, true);
}
// Now, remove all dead instruction nodes.

14
llvm/lib/Target/Hexagon/RDFGraph.cpp
View File

@ -1456,9 +1456,9 @@ void DataFlowGraph::removeUnusedPhis() {
PhiQ.insert(OA.Id);
}
if (RA.Addr->isDef())
unlinkDef(RA);
unlinkDef(RA, true);
else
unlinkUse(RA);
unlinkUse(RA, true);
}
NodeAddr<BlockNode*> BA = PA.Addr->getOwner(*this);
BA.Addr->removeMember(PA, *this);
@ -1593,13 +1593,10 @@ void DataFlowGraph::linkBlockRefs(DefStackMap &DefM, NodeAddr<BlockNode*> BA) {
}
// Remove the use node UA from any data-flow and structural links.
void DataFlowGraph::unlinkUse(NodeAddr<UseNode*> UA) {
void DataFlowGraph::unlinkUseDF(NodeAddr<UseNode*> UA) {
NodeId RD = UA.Addr->getReachingDef();
NodeId Sib = UA.Addr->getSibling();
NodeAddr<InstrNode*> IA = UA.Addr->getOwner(*this);
IA.Addr->removeMember(UA, *this);
if (RD == 0) {
assert(Sib == 0);
return;
@ -1623,7 +1620,7 @@ void DataFlowGraph::unlinkUse(NodeAddr<UseNode*> UA) {
}
// Remove the def node DA from any data-flow and structural links.
void DataFlowGraph::unlinkDef(NodeAddr<DefNode*> DA) {
void DataFlowGraph::unlinkDefDF(NodeAddr<DefNode*> DA) {
//
// RD
// | reached
@ -1710,7 +1707,4 @@ void DataFlowGraph::unlinkDef(NodeAddr<DefNode*> DA) {
Last.Addr->setSibling(RDA.Addr->getReachedUse());
RDA.Addr->setReachedUse(ReachedUses.front().Id);
}
NodeAddr<InstrNode*> IA = DA.Addr->getOwner(*this);
IA.Addr->removeMember(DA, *this);
}

19
llvm/lib/Target/Hexagon/RDFGraph.h
View File

@ -697,8 +697,16 @@ namespace rdf {
NodeList getRelatedRefs(NodeAddr<InstrNode*> IA,
NodeAddr<RefNode*> RA) const;
void unlinkUse(NodeAddr<UseNode*> UA);
void unlinkDef(NodeAddr<DefNode*> DA);
void unlinkUse(NodeAddr<UseNode*> UA, bool RemoveFromOwner) {
unlinkUseDF(UA);
if (RemoveFromOwner)
removeFromOwner(UA);
}
void unlinkDef(NodeAddr<DefNode*> DA, bool RemoveFromOwner) {
unlinkDefDF(DA);
if (RemoveFromOwner)
removeFromOwner(DA);
}
// Some useful filters.
template <uint16_t Kind>
@ -765,6 +773,13 @@ namespace rdf {
void linkStmtRefs(DefStackMap &DefM, NodeAddr<StmtNode*> SA);
void linkBlockRefs(DefStackMap &DefM, NodeAddr<BlockNode*> BA);
void unlinkUseDF(NodeAddr<UseNode*> UA);
void unlinkDefDF(NodeAddr<DefNode*> DA);
void removeFromOwner(NodeAddr<RefNode*> RA) {
NodeAddr<InstrNode*> IA = RA.Addr->getOwner(*this);
IA.Addr->removeMember(RA, *this);
}
TimerGroup TimeG;
NodeAddr<FuncNode*> Func;
NodeAllocator Memory;