//
// The LLVM Compiler Infrastructure
//
-// This file was developed by Chris Lattner and is distributed under
-// the University of Illinois Open Source License. See LICENSE.TXT for details.
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
//===----------------------------------------------------------------------===//
#include "LegalizeTypes.h"
-#include "llvm/Constants.h"
-#include "llvm/DerivedTypes.h"
-#include "llvm/Support/MathExtras.h"
+#include "llvm/CallingConv.h"
+#include "llvm/Support/CommandLine.h"
+#include "llvm/Target/TargetData.h"
using namespace llvm;
/// run - This is the main entry point for the type legalizer. This does a
// The root of the dag may dangle to deleted nodes until the type legalizer is
// done. Set it to null to avoid confusion.
- DAG.setRoot(SDOperand());
-
- // Walk all nodes in the graph, assigning them a NodeID of 'ReadyToProcess'
+ DAG.setRoot(SDValue());
+
+ // Walk all nodes in the graph, assigning them a NodeId of 'ReadyToProcess'
// (and remembering them) if they are leaves and assigning 'NewNode' if
// non-leaves.
for (SelectionDAG::allnodes_iterator I = DAG.allnodes_begin(),
I->setNodeId(NewNode);
}
}
-
+
// Now that we have a set of nodes to process, handle them all.
while (!Worklist.empty()) {
SDNode *N = Worklist.back();
Worklist.pop_back();
assert(N->getNodeId() == ReadyToProcess &&
"Node should be ready if on worklist!");
-
+
+ if (IgnoreNodeResults(N))
+ goto ScanOperands;
+
// Scan the values produced by the node, checking to see if any result
// types are illegal.
- unsigned i = 0;
- unsigned NumResults = N->getNumValues();
- do {
- MVT::ValueType ResultVT = N->getValueType(i);
- LegalizeAction Action = getTypeAction(ResultVT);
- if (Action == Promote) {
- PromoteResult(N, i);
+ for (unsigned i = 0, NumResults = N->getNumValues(); i < NumResults; ++i) {
+ MVT ResultVT = N->getValueType(i);
+ switch (getTypeAction(ResultVT)) {
+ default:
+ assert(false && "Unknown action!");
+ case Legal:
+ break;
+ case PromoteInteger:
+ PromoteIntegerResult(N, i);
goto NodeDone;
- } else if (Action == Expand) {
- // Expand can mean 1) split integer in half 2) scalarize single-element
- // vector 3) split vector in half.
- if (!MVT::isVector(ResultVT))
- ExpandResult(N, i);
- else if (MVT::getVectorNumElements(ResultVT) == 1)
- ScalarizeResult(N, i); // Scalarize the single-element vector.
- else
- SplitResult(N, i); // Split the vector in half.
+ case ExpandInteger:
+ ExpandIntegerResult(N, i);
+ goto NodeDone;
+ case SoftenFloat:
+ SoftenFloatResult(N, i);
+ goto NodeDone;
+ case ExpandFloat:
+ ExpandFloatResult(N, i);
+ goto NodeDone;
+ case ScalarizeVector:
+ ScalarizeVectorResult(N, i);
+ goto NodeDone;
+ case SplitVector:
+ SplitVectorResult(N, i);
goto NodeDone;
- } else {
- assert(Action == Legal && "Unknown action!");
}
- } while (++i < NumResults);
-
+ }
+
+ScanOperands:
// Scan the operand list for the node, handling any nodes with operands that
// are illegal.
{
unsigned NumOperands = N->getNumOperands();
bool NeedsRevisit = false;
+ unsigned i;
for (i = 0; i != NumOperands; ++i) {
- MVT::ValueType OpVT = N->getOperand(i).getValueType();
- LegalizeAction Action = getTypeAction(OpVT);
- if (Action == Promote) {
- NeedsRevisit = PromoteOperand(N, i);
+ if (IgnoreNodeResults(N->getOperand(i).getNode()))
+ continue;
+
+ MVT OpVT = N->getOperand(i).getValueType();
+ switch (getTypeAction(OpVT)) {
+ default:
+ assert(false && "Unknown action!");
+ case Legal:
+ continue;
+ case PromoteInteger:
+ NeedsRevisit = PromoteIntegerOperand(N, i);
break;
- } else if (Action == Expand) {
- // Expand can mean 1) split integer in half 2) scalarize single-element
- // vector 3) split vector in half.
- if (!MVT::isVector(OpVT)) {
- NeedsRevisit = ExpandOperand(N, i);
- } else if (MVT::getVectorNumElements(OpVT) == 1) {
- // Scalarize the single-element vector.
- NeedsRevisit = ScalarizeOperand(N, i);
- } else {
- NeedsRevisit = SplitOperand(N, i); // Split the vector in half.
- }
+ case ExpandInteger:
+ NeedsRevisit = ExpandIntegerOperand(N, i);
+ break;
+ case SoftenFloat:
+ NeedsRevisit = SoftenFloatOperand(N, i);
+ break;
+ case ExpandFloat:
+ NeedsRevisit = ExpandFloatOperand(N, i);
+ break;
+ case ScalarizeVector:
+ NeedsRevisit = ScalarizeVectorOperand(N, i);
+ break;
+ case SplitVector:
+ NeedsRevisit = SplitVectorOperand(N, i);
break;
- } else {
- assert(Action == Legal && "Unknown action!");
}
+ break;
}
// If the node needs revisiting, don't add all users to the worklist etc.
if (NeedsRevisit)
continue;
-
- if (i == NumOperands)
+
+ if (i == NumOperands) {
DEBUG(cerr << "Legally typed node: "; N->dump(&DAG); cerr << "\n");
}
+ }
NodeDone:
// If we reach here, the node was processed, potentially creating new nodes.
// Mark it as processed and add its users to the worklist as appropriate.
N->setNodeId(Processed);
-
+
for (SDNode::use_iterator UI = N->use_begin(), E = N->use_end();
UI != E; ++UI) {
SDNode *User = *UI;
- int NodeID = User->getNodeId();
- assert(NodeID != ReadyToProcess && NodeID != Processed &&
+ int NodeId = User->getNodeId();
+ assert(NodeId != ReadyToProcess && NodeId != Processed &&
"Invalid node id for user of unprocessed node!");
-
+
// This node has two options: it can either be a new node or its Node ID
// may be a count of the number of operands it has that are not ready.
- if (NodeID > 0) {
- User->setNodeId(NodeID-1);
-
+ if (NodeId > 0) {
+ User->setNodeId(NodeId-1);
+
// If this was the last use it was waiting on, add it to the ready list.
- if (NodeID-1 == ReadyToProcess)
+ if (NodeId-1 == ReadyToProcess)
Worklist.push_back(User);
continue;
}
-
+
// Otherwise, this node is new: this is the first operand of it that
- // became ready. Its new NodeID is the number of operands it has minus 1
+ // became ready. Its new NodeId is the number of operands it has minus 1
// (as this node is now processed).
- assert(NodeID == NewNode && "Unknown node ID!");
+ assert(NodeId == NewNode && "Unknown node ID!");
User->setNodeId(User->getNumOperands()-1);
-
+
// If the node only has a single operand, it is now ready.
if (User->getNumOperands() == 1)
Worklist.push_back(User);
}
}
-
+
// If the root changed (e.g. it was a dead load, update the root).
DAG.setRoot(Dummy.getValue());
#ifndef NDEBUG
for (SelectionDAG::allnodes_iterator I = DAG.allnodes_begin(),
E = DAG.allnodes_end(); I != E; ++I) {
- if (I->getNodeId() == Processed)
- continue;
- cerr << "Unprocessed node: ";
- I->dump(&DAG); cerr << "\n";
-
- if (I->getNodeId() == NewNode)
- cerr << "New node not 'noticed'?\n";
- else if (I->getNodeId() > 0)
- cerr << "Operand not processed?\n";
- else if (I->getNodeId() == ReadyToProcess)
- cerr << "Not added to worklist?\n";
- abort();
+ bool Failed = false;
+
+ // Check that all result types are legal.
+ if (!IgnoreNodeResults(I))
+ for (unsigned i = 0, NumVals = I->getNumValues(); i < NumVals; ++i)
+ if (!isTypeLegal(I->getValueType(i))) {
+ cerr << "Result type " << i << " illegal!\n";
+ Failed = true;
+ }
+
+ // Check that all operand types are legal.
+ for (unsigned i = 0, NumOps = I->getNumOperands(); i < NumOps; ++i)
+ if (!IgnoreNodeResults(I->getOperand(i).getNode()) &&
+ !isTypeLegal(I->getOperand(i).getValueType())) {
+ cerr << "Operand type " << i << " illegal!\n";
+ Failed = true;
+ }
+
+ if (I->getNodeId() != Processed) {
+ if (I->getNodeId() == NewNode)
+ cerr << "New node not 'noticed'?\n";
+ else if (I->getNodeId() > 0)
+ cerr << "Operand not processed?\n";
+ else if (I->getNodeId() == ReadyToProcess)
+ cerr << "Not added to worklist?\n";
+ Failed = true;
+ }
+
+ if (Failed) {
+ I->dump(&DAG); cerr << "\n";
+ abort();
+ }
}
#endif
}
-/// MarkNewNodes - The specified node is the root of a subtree of potentially
-/// new nodes. Add the correct NodeId to mark it.
-void DAGTypeLegalizer::MarkNewNodes(SDNode *N) {
+/// AnalyzeNewNode - The specified node is the root of a subtree of potentially
+/// new nodes. Correct any processed operands (this may change the node) and
+/// calculate the NodeId. If the node itself changes to a processed node, it
+/// is not remapped - the caller needs to take care of this.
+/// Returns the potentially changed node.
+SDNode *DAGTypeLegalizer::AnalyzeNewNode(SDNode *N) {
// If this was an existing node that is already done, we're done.
if (N->getNodeId() != NewNode)
- return;
+ return N;
+
+ // Remove any stale map entries.
+ ExpungeNode(N);
// Okay, we know that this node is new. Recursively walk all of its operands
// to see if they are new also. The depth of this walk is bounded by the size
//
// As we walk the operands, keep track of the number of nodes that are
// processed. If non-zero, this will become the new nodeid of this node.
+ // Already processed operands may need to be remapped to the node that
+ // replaced them, which can result in our node changing. Since remapping
+ // is rare, the code tries to minimize overhead in the non-remapping case.
+
+ SmallVector<SDValue, 8> NewOps;
unsigned NumProcessed = 0;
for (unsigned i = 0, e = N->getNumOperands(); i != e; ++i) {
- int OpId = N->getOperand(i).Val->getNodeId();
- if (OpId == NewNode)
- MarkNewNodes(N->getOperand(i).Val);
- else if (OpId == Processed)
+ SDValue OrigOp = N->getOperand(i);
+ SDValue Op = OrigOp;
+
+ if (Op.getNode()->getNodeId() == Processed)
+ RemapValue(Op);
+ else if (Op.getNode()->getNodeId() == NewNode)
+ AnalyzeNewValue(Op);
+
+ if (Op.getNode()->getNodeId() == Processed)
++NumProcessed;
+
+ if (!NewOps.empty()) {
+ // Some previous operand changed. Add this one to the list.
+ NewOps.push_back(Op);
+ } else if (Op != OrigOp) {
+ // This is the first operand to change - add all operands so far.
+ for (unsigned j = 0; j < i; ++j)
+ NewOps.push_back(N->getOperand(j));
+ NewOps.push_back(Op);
+ }
+ }
+
+ // Some operands changed - update the node.
+ if (!NewOps.empty()) {
+ SDNode *M = DAG.UpdateNodeOperands(SDValue(N, 0), &NewOps[0],
+ NewOps.size()).getNode();
+ if (M != N) {
+ if (M->getNodeId() != NewNode)
+ // It morphed into a previously analyzed node - nothing more to do.
+ return M;
+
+ // It morphed into a different new node. Do the equivalent of passing
+ // it to AnalyzeNewNode: expunge it and calculate the NodeId.
+ N = M;
+ ExpungeNode(N);
+ }
}
-
+
+ // Calculate the NodeId.
N->setNodeId(N->getNumOperands()-NumProcessed);
if (N->getNodeId() == ReadyToProcess)
Worklist.push_back(N);
+
+ return N;
+}
+
+/// AnalyzeNewValue - Call AnalyzeNewNode, updating the node in Val if needed.
+/// If the node changes to a processed node, then remap it.
+void DAGTypeLegalizer::AnalyzeNewValue(SDValue &Val) {
+ SDNode *N(Val.getNode());
+ // If this was an existing node that is already done, avoid remapping it.
+ if (N->getNodeId() != NewNode)
+ return;
+ SDNode *M(AnalyzeNewNode(N));
+ if (M != N)
+ Val.setNode(M);
+ if (M->getNodeId() == Processed)
+ // It morphed into an already processed node - remap it.
+ RemapValue(Val);
+}
+
+
+namespace {
+ /// NodeUpdateListener - This class is a DAGUpdateListener that listens for
+ /// updates to nodes and recomputes their ready state.
+ class VISIBILITY_HIDDEN NodeUpdateListener :
+ public SelectionDAG::DAGUpdateListener {
+ DAGTypeLegalizer &DTL;
+ public:
+ explicit NodeUpdateListener(DAGTypeLegalizer &dtl) : DTL(dtl) {}
+
+ virtual void NodeDeleted(SDNode *N, SDNode *E) {
+ assert(N->getNodeId() != DAGTypeLegalizer::Processed &&
+ N->getNodeId() != DAGTypeLegalizer::ReadyToProcess &&
+ "RAUW deleted processed node!");
+ // It is possible, though rare, for the deleted node N to occur as a
+ // target in a map, so note the replacement N -> E in ReplacedValues.
+ assert(E && "Node not replaced?");
+ DTL.NoteDeletion(N, E);
+ }
+
+ virtual void NodeUpdated(SDNode *N) {
+ // Node updates can mean pretty much anything. It is possible that an
+ // operand was set to something already processed (f.e.) in which case
+ // this node could become ready. Recompute its flags.
+ assert(N->getNodeId() != DAGTypeLegalizer::Processed &&
+ N->getNodeId() != DAGTypeLegalizer::ReadyToProcess &&
+ "RAUW updated processed node!");
+ DTL.ReanalyzeNode(N);
+ }
+ };
}
+
/// ReplaceValueWith - The specified value was legalized to the specified other
-/// value. If they are different, update the DAG and NodeIDs replacing any uses
+/// value. If they are different, update the DAG and NodeIds replacing any uses
/// of From to use To instead.
-void DAGTypeLegalizer::ReplaceValueWith(SDOperand From, SDOperand To) {
+void DAGTypeLegalizer::ReplaceValueWith(SDValue From, SDValue To) {
if (From == To) return;
-
+
// If expansion produced new nodes, make sure they are properly marked.
- if (To.Val->getNodeId() == NewNode)
- MarkNewNodes(To.Val);
-
+ ExpungeNode(From.getNode());
+ AnalyzeNewValue(To); // Expunges To.
+
// Anything that used the old node should now use the new one. Note that this
// can potentially cause recursive merging.
- DAG.ReplaceAllUsesOfValueWith(From, To);
-
- // The old node may still be present in ExpandedNodes or PromotedNodes.
- // Inform them about the replacement.
- ReplacedNodes[From] = To;
-
- // Since we just made an unstructured update to the DAG, which could wreak
- // general havoc on anything that once used From and now uses To, walk all
- // users of the result, updating their flags.
- for (SDNode::use_iterator I = To.Val->use_begin(), E = To.Val->use_end();
- I != E; ++I) {
- SDNode *User = *I;
- // If the node isn't already processed or in the worklist, mark it as new,
- // then use MarkNewNodes to recompute its ID.
- int NodeId = User->getNodeId();
- if (NodeId != ReadyToProcess && NodeId != Processed) {
- User->setNodeId(NewNode);
- MarkNewNodes(User);
- }
- }
+ NodeUpdateListener NUL(*this);
+ DAG.ReplaceAllUsesOfValueWith(From, To, &NUL);
+
+ // The old node may still be present in a map like ExpandedIntegers or
+ // PromotedIntegers. Inform maps about the replacement.
+ ReplacedValues[From] = To;
}
/// ReplaceNodeWith - Replace uses of the 'from' node's results with the 'to'
/// node's results. The from and to node must define identical result types.
void DAGTypeLegalizer::ReplaceNodeWith(SDNode *From, SDNode *To) {
if (From == To) return;
+
+ // If expansion produced new nodes, make sure they are properly marked.
+ ExpungeNode(From);
+
+ To = AnalyzeNewNode(To); // Expunges To.
+ // If To morphed into an already processed node, its values may need
+ // remapping. This is done below.
+
assert(From->getNumValues() == To->getNumValues() &&
"Node results don't match");
-
- // If expansion produced new nodes, make sure they are properly marked.
- if (To->getNodeId() == NewNode)
- MarkNewNodes(To);
-
+
// Anything that used the old node should now use the new one. Note that this
// can potentially cause recursive merging.
- DAG.ReplaceAllUsesWith(From, To);
-
- // The old node may still be present in ExpandedNodes or PromotedNodes.
- // Inform them about the replacement.
+ NodeUpdateListener NUL(*this);
for (unsigned i = 0, e = From->getNumValues(); i != e; ++i) {
- assert(From->getValueType(i) == To->getValueType(i) &&
- "Node results don't match");
- ReplacedNodes[SDOperand(From, i)] = SDOperand(To, i);
- }
-
- // Since we just made an unstructured update to the DAG, which could wreak
- // general havoc on anything that once used From and now uses To, walk all
- // users of the result, updating their flags.
- for (SDNode::use_iterator I = To->use_begin(), E = To->use_end();I != E; ++I){
- SDNode *User = *I;
- // If the node isn't already processed or in the worklist, mark it as new,
- // then use MarkNewNodes to recompute its ID.
- int NodeId = User->getNodeId();
- if (NodeId != ReadyToProcess && NodeId != Processed) {
- User->setNodeId(NewNode);
- MarkNewNodes(User);
- }
+ SDValue FromVal(From, i);
+ SDValue ToVal(To, i);
+
+ // AnalyzeNewNode may have morphed a new node into a processed node. Remap
+ // values now.
+ if (To->getNodeId() == Processed)
+ RemapValue(ToVal);
+
+ assert(FromVal.getValueType() == ToVal.getValueType() &&
+ "Node results don't match!");
+
+ // Make anything that used the old value use the new value.
+ DAG.ReplaceAllUsesOfValueWith(FromVal, ToVal, &NUL);
+
+ // The old node may still be present in a map like ExpandedIntegers or
+ // PromotedIntegers. Inform maps about the replacement.
+ ReplacedValues[FromVal] = ToVal;
}
}
-
-/// RemapNode - If the specified value was already legalized to another value,
+/// RemapValue - If the specified value was already legalized to another value,
/// replace it by that value.
-void DAGTypeLegalizer::RemapNode(SDOperand &N) {
- DenseMap<SDOperand, SDOperand>::iterator I = ReplacedNodes.find(N);
- if (I != ReplacedNodes.end()) {
+void DAGTypeLegalizer::RemapValue(SDValue &N) {
+ DenseMap<SDValue, SDValue>::iterator I = ReplacedValues.find(N);
+ if (I != ReplacedValues.end()) {
// Use path compression to speed up future lookups if values get multiply
// replaced with other values.
- RemapNode(I->second);
+ RemapValue(I->second);
N = I->second;
}
+ assert(N.getNode()->getNodeId() != NewNode && "Mapped to unanalyzed node!");
}
-void DAGTypeLegalizer::SetPromotedOp(SDOperand Op, SDOperand Result) {
- if (Result.Val->getNodeId() == NewNode)
- MarkNewNodes(Result.Val);
+/// ExpungeNode - If N has a bogus mapping in ReplacedValues, eliminate it.
+/// This can occur when a node is deleted then reallocated as a new node -
+/// the mapping in ReplacedValues applies to the deleted node, not the new
+/// one.
+/// The only map that can have a deleted node as a source is ReplacedValues.
+/// Other maps can have deleted nodes as targets, but since their looked-up
+/// values are always immediately remapped using RemapValue, resulting in a
+/// not-deleted node, this is harmless as long as ReplacedValues/RemapValue
+/// always performs correct mappings. In order to keep the mapping correct,
+/// ExpungeNode should be called on any new nodes *before* adding them as
+/// either source or target to ReplacedValues (which typically means calling
+/// Expunge when a new node is first seen, since it may no longer be marked
+/// NewNode by the time it is added to ReplacedValues).
+void DAGTypeLegalizer::ExpungeNode(SDNode *N) {
+ if (N->getNodeId() != NewNode)
+ return;
+
+ // If N is not remapped by ReplacedValues then there is nothing to do.
+ unsigned i, e;
+ for (i = 0, e = N->getNumValues(); i != e; ++i)
+ if (ReplacedValues.find(SDValue(N, i)) != ReplacedValues.end())
+ break;
+
+ if (i == e)
+ return;
+
+ // Remove N from all maps - this is expensive but rare.
+
+ for (DenseMap<SDValue, SDValue>::iterator I = PromotedIntegers.begin(),
+ E = PromotedIntegers.end(); I != E; ++I) {
+ assert(I->first.getNode() != N);
+ RemapValue(I->second);
+ }
+
+ for (DenseMap<SDValue, SDValue>::iterator I = SoftenedFloats.begin(),
+ E = SoftenedFloats.end(); I != E; ++I) {
+ assert(I->first.getNode() != N);
+ RemapValue(I->second);
+ }
- SDOperand &OpEntry = PromotedNodes[Op];
- assert(OpEntry.Val == 0 && "Node is already promoted!");
+ for (DenseMap<SDValue, SDValue>::iterator I = ScalarizedVectors.begin(),
+ E = ScalarizedVectors.end(); I != E; ++I) {
+ assert(I->first.getNode() != N);
+ RemapValue(I->second);
+ }
+
+ for (DenseMap<SDValue, std::pair<SDValue, SDValue> >::iterator
+ I = ExpandedIntegers.begin(), E = ExpandedIntegers.end(); I != E; ++I){
+ assert(I->first.getNode() != N);
+ RemapValue(I->second.first);
+ RemapValue(I->second.second);
+ }
+
+ for (DenseMap<SDValue, std::pair<SDValue, SDValue> >::iterator
+ I = ExpandedFloats.begin(), E = ExpandedFloats.end(); I != E; ++I) {
+ assert(I->first.getNode() != N);
+ RemapValue(I->second.first);
+ RemapValue(I->second.second);
+ }
+
+ for (DenseMap<SDValue, std::pair<SDValue, SDValue> >::iterator
+ I = SplitVectors.begin(), E = SplitVectors.end(); I != E; ++I) {
+ assert(I->first.getNode() != N);
+ RemapValue(I->second.first);
+ RemapValue(I->second.second);
+ }
+
+ for (DenseMap<SDValue, SDValue>::iterator I = ReplacedValues.begin(),
+ E = ReplacedValues.end(); I != E; ++I)
+ RemapValue(I->second);
+
+ for (unsigned i = 0, e = N->getNumValues(); i != e; ++i)
+ ReplacedValues.erase(SDValue(N, i));
+}
+
+void DAGTypeLegalizer::SetPromotedInteger(SDValue Op, SDValue Result) {
+ AnalyzeNewValue(Result);
+
+ SDValue &OpEntry = PromotedIntegers[Op];
+ assert(OpEntry.getNode() == 0 && "Node is already promoted!");
OpEntry = Result;
}
-void DAGTypeLegalizer::SetScalarizedOp(SDOperand Op, SDOperand Result) {
- if (Result.Val->getNodeId() == NewNode)
- MarkNewNodes(Result.Val);
-
- SDOperand &OpEntry = ScalarizedNodes[Op];
- assert(OpEntry.Val == 0 && "Node is already scalarized!");
+void DAGTypeLegalizer::SetSoftenedFloat(SDValue Op, SDValue Result) {
+ AnalyzeNewValue(Result);
+
+ SDValue &OpEntry = SoftenedFloats[Op];
+ assert(OpEntry.getNode() == 0 && "Node is already converted to integer!");
OpEntry = Result;
}
+void DAGTypeLegalizer::SetScalarizedVector(SDValue Op, SDValue Result) {
+ AnalyzeNewValue(Result);
+
+ SDValue &OpEntry = ScalarizedVectors[Op];
+ assert(OpEntry.getNode() == 0 && "Node is already scalarized!");
+ OpEntry = Result;
+}
-void DAGTypeLegalizer::GetExpandedOp(SDOperand Op, SDOperand &Lo,
- SDOperand &Hi) {
- std::pair<SDOperand, SDOperand> &Entry = ExpandedNodes[Op];
- RemapNode(Entry.first);
- RemapNode(Entry.second);
- assert(Entry.first.Val && "Operand isn't expanded");
+void DAGTypeLegalizer::GetExpandedInteger(SDValue Op, SDValue &Lo,
+ SDValue &Hi) {
+ std::pair<SDValue, SDValue> &Entry = ExpandedIntegers[Op];
+ RemapValue(Entry.first);
+ RemapValue(Entry.second);
+ assert(Entry.first.getNode() && "Operand isn't expanded");
Lo = Entry.first;
Hi = Entry.second;
}
-void DAGTypeLegalizer::SetExpandedOp(SDOperand Op, SDOperand Lo,
- SDOperand Hi) {
+void DAGTypeLegalizer::SetExpandedInteger(SDValue Op, SDValue Lo,
+ SDValue Hi) {
+ // Lo/Hi may have been newly allocated, if so, add nodeid's as relevant.
+ AnalyzeNewValue(Lo);
+ AnalyzeNewValue(Hi);
+
+ // Remember that this is the result of the node.
+ std::pair<SDValue, SDValue> &Entry = ExpandedIntegers[Op];
+ assert(Entry.first.getNode() == 0 && "Node already expanded");
+ Entry.first = Lo;
+ Entry.second = Hi;
+}
+
+void DAGTypeLegalizer::GetExpandedFloat(SDValue Op, SDValue &Lo,
+ SDValue &Hi) {
+ std::pair<SDValue, SDValue> &Entry = ExpandedFloats[Op];
+ RemapValue(Entry.first);
+ RemapValue(Entry.second);
+ assert(Entry.first.getNode() && "Operand isn't expanded");
+ Lo = Entry.first;
+ Hi = Entry.second;
+}
+
+void DAGTypeLegalizer::SetExpandedFloat(SDValue Op, SDValue Lo,
+ SDValue Hi) {
+ // Lo/Hi may have been newly allocated, if so, add nodeid's as relevant.
+ AnalyzeNewValue(Lo);
+ AnalyzeNewValue(Hi);
+
// Remember that this is the result of the node.
- std::pair<SDOperand, SDOperand> &Entry = ExpandedNodes[Op];
- assert(Entry.first.Val == 0 && "Node already expanded");
+ std::pair<SDValue, SDValue> &Entry = ExpandedFloats[Op];
+ assert(Entry.first.getNode() == 0 && "Node already expanded");
Entry.first = Lo;
Entry.second = Hi;
-
+}
+
+void DAGTypeLegalizer::GetSplitVector(SDValue Op, SDValue &Lo,
+ SDValue &Hi) {
+ std::pair<SDValue, SDValue> &Entry = SplitVectors[Op];
+ RemapValue(Entry.first);
+ RemapValue(Entry.second);
+ assert(Entry.first.getNode() && "Operand isn't split");
+ Lo = Entry.first;
+ Hi = Entry.second;
+}
+
+void DAGTypeLegalizer::SetSplitVector(SDValue Op, SDValue Lo,
+ SDValue Hi) {
// Lo/Hi may have been newly allocated, if so, add nodeid's as relevant.
- if (Lo.Val->getNodeId() == NewNode)
- MarkNewNodes(Lo.Val);
- if (Hi.Val->getNodeId() == NewNode)
- MarkNewNodes(Hi.Val);
+ AnalyzeNewValue(Lo);
+ AnalyzeNewValue(Hi);
+
+ // Remember that this is the result of the node.
+ std::pair<SDValue, SDValue> &Entry = SplitVectors[Op];
+ assert(Entry.first.getNode() == 0 && "Node already split");
+ Entry.first = Lo;
+ Entry.second = Hi;
}
-SDOperand DAGTypeLegalizer::CreateStackStoreLoad(SDOperand Op,
- MVT::ValueType DestVT) {
- // Create the stack frame object.
- SDOperand FIPtr = DAG.CreateStackTemporary(DestVT);
-
+
+//===----------------------------------------------------------------------===//
+// Utilities.
+//===----------------------------------------------------------------------===//
+
+/// BitConvertToInteger - Convert to an integer of the same size.
+SDValue DAGTypeLegalizer::BitConvertToInteger(SDValue Op) {
+ unsigned BitWidth = Op.getValueType().getSizeInBits();
+ return DAG.getNode(ISD::BIT_CONVERT, MVT::getIntegerVT(BitWidth), Op);
+}
+
+SDValue DAGTypeLegalizer::CreateStackStoreLoad(SDValue Op,
+ MVT DestVT) {
+ // Create the stack frame object. Make sure it is aligned for both
+ // the source and destination types.
+ unsigned SrcAlign =
+ TLI.getTargetData()->getPrefTypeAlignment(Op.getValueType().getTypeForMVT());
+ SDValue FIPtr = DAG.CreateStackTemporary(DestVT, SrcAlign);
+
// Emit a store to the stack slot.
- SDOperand Store = DAG.getStore(DAG.getEntryNode(), Op, FIPtr, NULL, 0);
+ SDValue Store = DAG.getStore(DAG.getEntryNode(), Op, FIPtr, NULL, 0);
// Result is a load from the stack slot.
return DAG.getLoad(DestVT, Store, FIPtr, NULL, 0);
}
-/// HandleMemIntrinsic - This handles memcpy/memset/memmove with invalid
-/// operands. This promotes or expands the operands as required.
-SDOperand DAGTypeLegalizer::HandleMemIntrinsic(SDNode *N) {
- // The chain and pointer [operands #0 and #1] are always valid types.
- SDOperand Chain = N->getOperand(0);
- SDOperand Ptr = N->getOperand(1);
- SDOperand Op2 = N->getOperand(2);
-
- // Op #2 is either a value (memset) or a pointer. Promote it if required.
- switch (getTypeAction(Op2.getValueType())) {
- default: assert(0 && "Unknown action for pointer/value operand");
- case Legal: break;
- case Promote: Op2 = GetPromotedOp(Op2); break;
- }
-
- // The length could have any action required.
- SDOperand Length = N->getOperand(3);
- switch (getTypeAction(Length.getValueType())) {
- default: assert(0 && "Unknown action for memop operand");
- case Legal: break;
- case Promote: Length = GetPromotedZExtOp(Length); break;
- case Expand:
- SDOperand Dummy; // discard the high part.
- GetExpandedOp(Length, Length, Dummy);
- break;
- }
-
- SDOperand Align = N->getOperand(4);
- switch (getTypeAction(Align.getValueType())) {
- default: assert(0 && "Unknown action for memop operand");
- case Legal: break;
- case Promote: Align = GetPromotedZExtOp(Align); break;
+/// JoinIntegers - Build an integer with low bits Lo and high bits Hi.
+SDValue DAGTypeLegalizer::JoinIntegers(SDValue Lo, SDValue Hi) {
+ MVT LVT = Lo.getValueType();
+ MVT HVT = Hi.getValueType();
+ MVT NVT = MVT::getIntegerVT(LVT.getSizeInBits() + HVT.getSizeInBits());
+
+ Lo = DAG.getNode(ISD::ZERO_EXTEND, NVT, Lo);
+ Hi = DAG.getNode(ISD::ANY_EXTEND, NVT, Hi);
+ Hi = DAG.getNode(ISD::SHL, NVT, Hi, DAG.getConstant(LVT.getSizeInBits(),
+ TLI.getShiftAmountTy()));
+ return DAG.getNode(ISD::OR, NVT, Lo, Hi);
+}
+
+/// SplitInteger - Return the lower LoVT bits of Op in Lo and the upper HiVT
+/// bits in Hi.
+void DAGTypeLegalizer::SplitInteger(SDValue Op,
+ MVT LoVT, MVT HiVT,
+ SDValue &Lo, SDValue &Hi) {
+ assert(LoVT.getSizeInBits() + HiVT.getSizeInBits() ==
+ Op.getValueType().getSizeInBits() && "Invalid integer splitting!");
+ Lo = DAG.getNode(ISD::TRUNCATE, LoVT, Op);
+ Hi = DAG.getNode(ISD::SRL, Op.getValueType(), Op,
+ DAG.getConstant(LoVT.getSizeInBits(),
+ TLI.getShiftAmountTy()));
+ Hi = DAG.getNode(ISD::TRUNCATE, HiVT, Hi);
+}
+
+/// SplitInteger - Return the lower and upper halves of Op's bits in a value
+/// type half the size of Op's.
+void DAGTypeLegalizer::SplitInteger(SDValue Op,
+ SDValue &Lo, SDValue &Hi) {
+ MVT HalfVT = MVT::getIntegerVT(Op.getValueType().getSizeInBits()/2);
+ SplitInteger(Op, HalfVT, HalfVT, Lo, Hi);
+}
+
+/// MakeLibCall - Generate a libcall taking the given operands as arguments and
+/// returning a result of type RetVT.
+SDValue DAGTypeLegalizer::MakeLibCall(RTLIB::Libcall LC, MVT RetVT,
+ const SDValue *Ops, unsigned NumOps,
+ bool isSigned) {
+ TargetLowering::ArgListTy Args;
+ Args.reserve(NumOps);
+
+ TargetLowering::ArgListEntry Entry;
+ for (unsigned i = 0; i != NumOps; ++i) {
+ Entry.Node = Ops[i];
+ Entry.Ty = Entry.Node.getValueType().getTypeForMVT();
+ Entry.isSExt = isSigned;
+ Entry.isZExt = !isSigned;
+ Args.push_back(Entry);
}
-
- SDOperand AlwaysInline = N->getOperand(5);
- switch (getTypeAction(AlwaysInline.getValueType())) {
- default: assert(0 && "Unknown action for memop operand");
- case Legal: break;
- case Promote: AlwaysInline = GetPromotedZExtOp(AlwaysInline); break;
+ SDValue Callee = DAG.getExternalSymbol(TLI.getLibcallName(LC),
+ TLI.getPointerTy());
+
+ const Type *RetTy = RetVT.getTypeForMVT();
+ std::pair<SDValue,SDValue> CallInfo =
+ TLI.LowerCallTo(DAG.getEntryNode(), RetTy, isSigned, !isSigned, false,
+ false, CallingConv::C, false, Callee, Args, DAG);
+ return CallInfo.first;
+}
+
+/// LibCallify - Convert the node into a libcall with the same prototype.
+SDValue DAGTypeLegalizer::LibCallify(RTLIB::Libcall LC, SDNode *N,
+ bool isSigned) {
+ unsigned NumOps = N->getNumOperands();
+ if (NumOps == 0) {
+ return MakeLibCall(LC, N->getValueType(0), 0, 0, isSigned);
+ } else if (NumOps == 1) {
+ SDValue Op = N->getOperand(0);
+ return MakeLibCall(LC, N->getValueType(0), &Op, 1, isSigned);
+ } else if (NumOps == 2) {
+ SDValue Ops[2] = { N->getOperand(0), N->getOperand(1) };
+ return MakeLibCall(LC, N->getValueType(0), Ops, 2, isSigned);
}
-
- SDOperand Ops[] = { Chain, Ptr, Op2, Length, Align, AlwaysInline };
- return DAG.UpdateNodeOperands(SDOperand(N, 0), Ops, 6);
+ SmallVector<SDValue, 8> Ops(NumOps);
+ for (unsigned i = 0; i < NumOps; ++i)
+ Ops[i] = N->getOperand(i);
+
+ return MakeLibCall(LC, N->getValueType(0), &Ops[0], NumOps, isSigned);
}
-/// SplitOp - Return the lower and upper halves of Op's bits in a value type
-/// half the size of Op's.
-void DAGTypeLegalizer::SplitOp(SDOperand Op, SDOperand &Lo, SDOperand &Hi) {
- unsigned NVTBits = MVT::getSizeInBits(Op.getValueType())/2;
- assert(MVT::getSizeInBits(Op.getValueType()) == 2*NVTBits &&
- "Cannot split odd sized integer type");
- MVT::ValueType NVT = MVT::getIntegerType(NVTBits);
- Lo = DAG.getNode(ISD::TRUNCATE, NVT, Op);
- Hi = DAG.getNode(ISD::SRL, Op.getValueType(), Op,
- DAG.getConstant(NVTBits, TLI.getShiftAmountTy()));
- Hi = DAG.getNode(ISD::TRUNCATE, NVT, Hi);
+SDValue DAGTypeLegalizer::GetVectorElementPointer(SDValue VecPtr, MVT EltVT,
+ SDValue Index) {
+ // Make sure the index type is big enough to compute in.
+ if (Index.getValueType().bitsGT(TLI.getPointerTy()))
+ Index = DAG.getNode(ISD::TRUNCATE, TLI.getPointerTy(), Index);
+ else
+ Index = DAG.getNode(ISD::ZERO_EXTEND, TLI.getPointerTy(), Index);
+
+ // Calculate the element offset and add it to the pointer.
+ unsigned EltSize = EltVT.getSizeInBits() / 8; // FIXME: should be ABI size.
+
+ Index = DAG.getNode(ISD::MUL, Index.getValueType(), Index,
+ DAG.getConstant(EltSize, Index.getValueType()));
+ return DAG.getNode(ISD::ADD, Index.getValueType(), Index, VecPtr);
+}
+
+/// GetSplitDestVTs - Compute the VTs needed for the low/hi parts of a type
+/// which is split into two not necessarily identical pieces.
+void DAGTypeLegalizer::GetSplitDestVTs(MVT InVT, MVT &LoVT, MVT &HiVT) {
+ if (!InVT.isVector()) {
+ LoVT = HiVT = TLI.getTypeToTransformTo(InVT);
+ } else {
+ MVT NewEltVT = InVT.getVectorElementType();
+ unsigned NumElements = InVT.getVectorNumElements();
+ if ((NumElements & (NumElements-1)) == 0) { // Simple power of two vector.
+ NumElements >>= 1;
+ LoVT = HiVT = MVT::getVectorVT(NewEltVT, NumElements);
+ } else { // Non-power-of-two vectors.
+ unsigned NewNumElts_Lo = 1 << Log2_32(NumElements);
+ unsigned NewNumElts_Hi = NumElements - NewNumElts_Lo;
+ LoVT = MVT::getVectorVT(NewEltVT, NewNumElts_Lo);
+ HiVT = MVT::getVectorVT(NewEltVT, NewNumElts_Hi);
+ }
+ }
}
projects / oota-llvm.git / blobdiff