#include "LegalizeTypes.h"
#include "llvm/CallingConv.h"
-#include "llvm/Constants.h"
-#include "llvm/DerivedTypes.h"
#include "llvm/Support/CommandLine.h"
-#include "llvm/Support/MathExtras.h"
+#include "llvm/Target/TargetData.h"
using namespace llvm;
-#ifndef NDEBUG
-static cl::opt<bool>
-ViewLegalizeTypesDAGs("view-legalize-types-dags", cl::Hidden,
- cl::desc("Pop up a window to show dags before legalize types"));
-#else
-static const bool ViewLegalizeTypesDAGs = 0;
-#endif
-
-
-
/// run - This is the main entry point for the type legalizer. This does a
/// top-down traversal of the dag, legalizing types as it goes.
void DAGTypeLegalizer::run() {
// 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());
+ DAG.setRoot(SDValue());
- // Walk all nodes in the graph, assigning them a NodeID of 'ReadyToProcess'
+ // 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(),
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 {
+ for (unsigned i = 0, NumResults = N->getNumValues(); i < NumResults; ++i) {
MVT ResultVT = N->getValueType(i);
switch (getTypeAction(ResultVT)) {
default:
case ExpandInteger:
ExpandIntegerResult(N, i);
goto NodeDone;
- case PromoteFloat:
- PromoteFloatResult(N, i);
+ case SoftenFloat:
+ SoftenFloatResult(N, i);
goto NodeDone;
case ExpandFloat:
ExpandFloatResult(N, i);
goto NodeDone;
- case Scalarize:
- ScalarizeResult(N, i);
+ case ScalarizeVector:
+ ScalarizeVectorResult(N, i);
goto NodeDone;
- case Split:
- SplitResult(N, i);
+ case SplitVector:
+ SplitVectorResult(N, i);
goto NodeDone;
}
- } 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) {
+ if (IgnoreNodeResults(N->getOperand(i).getNode()))
+ continue;
+
MVT OpVT = N->getOperand(i).getValueType();
switch (getTypeAction(OpVT)) {
default:
case ExpandInteger:
NeedsRevisit = ExpandIntegerOperand(N, i);
break;
- case PromoteFloat:
- NeedsRevisit = PromoteFloatOperand(N, i);
+ case SoftenFloat:
+ NeedsRevisit = SoftenFloatOperand(N, i);
break;
case ExpandFloat:
NeedsRevisit = ExpandFloatOperand(N, i);
break;
- case Scalarize:
- NeedsRevisit = ScalarizeOperand(N, i);
+ case ScalarizeVector:
+ NeedsRevisit = ScalarizeVectorOperand(N, i);
break;
- case Split:
- NeedsRevisit = SplitOperand(N, i);
+ case SplitVector:
+ NeedsRevisit = SplitVectorOperand(N, i);
break;
}
break;
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.
for (SDNode::use_iterator UI = N->use_begin(), E = N->use_end();
UI != E; ++UI) {
- SDNode *User = UI->getUser();
- int NodeID = User->getNodeId();
- assert(NodeID != ReadyToProcess && NodeID != Processed &&
+ SDNode *User = *UI;
+ 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.
bool Failed = false;
// Check that all result types are legal.
- for (unsigned i = 0, NumVals = I->getNumValues(); i < NumVals; ++i)
- if (!isTypeLegal(I->getValueType(i))) {
- cerr << "Result type " << i << " illegal!\n";
- Failed = true;
- }
+ 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 (!isTypeLegal(I->getOperand(i).getValueType())) {
+ if (!IgnoreNodeResults(I->getOperand(i).getNode()) &&
+ !isTypeLegal(I->getOperand(i).getValueType())) {
cerr << "Operand type " << i << " illegal!\n";
Failed = true;
}
/// 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.
-void DAGTypeLegalizer::AnalyzeNewNode(SDNode *&N) {
+/// 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
// 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<SDOperand, 8> NewOps;
+ SmallVector<SDValue, 8> NewOps;
unsigned NumProcessed = 0;
for (unsigned i = 0, e = N->getNumOperands(); i != e; ++i) {
- SDOperand OrigOp = N->getOperand(i);
- SDOperand Op = OrigOp;
+ SDValue OrigOp = N->getOperand(i);
+ SDValue Op = OrigOp;
- if (Op.Val->getNodeId() == Processed)
- RemapNode(Op);
+ if (Op.getNode()->getNodeId() == Processed)
+ RemapValue(Op);
+ else if (Op.getNode()->getNodeId() == NewNode)
+ AnalyzeNewValue(Op);
- if (Op.Val->getNodeId() == NewNode)
- AnalyzeNewNode(Op.Val);
- else if (Op.Val->getNodeId() == Processed)
+ if (Op.getNode()->getNodeId() == Processed)
++NumProcessed;
if (!NewOps.empty()) {
}
// Some operands changed - update the node.
- if (!NewOps.empty())
- N = DAG.UpdateNodeOperands(SDOperand(N, 0), &NewOps[0], NewOps.size()).Val;
+ 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.
public SelectionDAG::DAGUpdateListener {
DAGTypeLegalizer &DTL;
public:
- NodeUpdateListener(DAGTypeLegalizer &dtl) : DTL(dtl) {}
+ 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 ReplacedNodes.
+ // target in a map, so note the replacement N -> E in ReplacedValues.
assert(E && "Node not replaced?");
- for (unsigned i = 0, e = E->getNumValues(); i != e; ++i)
- DTL.NoteReplacement(SDOperand(N, i), SDOperand(E, i));
+ DTL.NoteDeletion(N, E);
}
virtual void NodeUpdated(SDNode *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.
- AnalyzeNewNode(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.
// The old node may still be present in a map like ExpandedIntegers or
// PromotedIntegers. Inform maps about the replacement.
- NoteReplacement(From, To);
+ ReplacedValues[From] = To;
}
/// ReplaceNodeWith - Replace uses of the 'from' node's results with the 'to'
if (From == To) return;
// If expansion produced new nodes, make sure they are properly marked.
- AnalyzeNewNode(To);
+ 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");
// Anything that used the old node should now use the new one. Note that this
// can potentially cause recursive merging.
NodeUpdateListener NUL(*this);
- DAG.ReplaceAllUsesWith(From, To, &NUL);
-
- // The old node may still be present in a map like ExpandedIntegers or
- // PromotedIntegers. Inform maps about the replacement.
for (unsigned i = 0, e = From->getNumValues(); i != e; ++i) {
- assert(From->getValueType(i) == To->getValueType(i) &&
- "Node results don't match");
- NoteReplacement(SDOperand(From, i), SDOperand(To, i));
+ 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!");
}
-/// ExpungeNode - If this is a deleted value that was kept around to speed up
-/// remapping, remove it globally now. The only map that can have a deleted
-/// node as a source is ReplacedNodes. Other maps can have deleted nodes as
-/// targets, but since their looked-up values are always immediately remapped
-/// using RemapNode, resulting in a not-deleted node, this is harmless as long
-/// as ReplacedNodes/RemapNode always performs correct mappings. The mapping
-/// will always be correct as long as ExpungeNode is called on the source when
-/// adding a new node to ReplacedNodes, and called on the target when adding
-/// a new node to any map.
-void DAGTypeLegalizer::ExpungeNode(SDOperand N) {
- SDOperand Replacement = N;
- RemapNode(Replacement);
- if (Replacement != N) {
- // Remove N from all maps - this is expensive but extremely rare.
- ReplacedNodes.erase(N);
-
- for (DenseMap<SDOperand, SDOperand>::iterator I = ReplacedNodes.begin(),
- E = ReplacedNodes.end(); I != E; ++I) {
- if (I->second == N)
- I->second = Replacement;
- }
+/// 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;
- for (DenseMap<SDOperand, SDOperand>::iterator I = PromotedIntegers.begin(),
- E = PromotedIntegers.end(); I != E; ++I) {
- assert(I->first != N);
- if (I->second == N)
- I->second = Replacement;
- }
+ // 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;
- for (DenseMap<SDOperand, SDOperand>::iterator I = PromotedFloats.begin(),
- E = PromotedFloats.end(); I != E; ++I) {
- assert(I->first != N);
- if (I->second == N)
- I->second = Replacement;
- }
+ if (i == e)
+ return;
- for (DenseMap<SDOperand, SDOperand>::iterator I = ScalarizedVectors.begin(),
- E = ScalarizedVectors.end(); I != E; ++I) {
- assert(I->first != N);
- if (I->second == N)
- I->second = Replacement;
- }
+ // Remove N from all maps - this is expensive but rare.
- for (DenseMap<SDOperand, std::pair<SDOperand, SDOperand> >::iterator
- I = ExpandedIntegers.begin(), E = ExpandedIntegers.end(); I != E; ++I){
- assert(I->first != N);
- if (I->second.first == N)
- I->second.first = Replacement;
- if (I->second.second == N)
- I->second.second = Replacement;
- }
+ for (DenseMap<SDValue, SDValue>::iterator I = PromotedIntegers.begin(),
+ E = PromotedIntegers.end(); I != E; ++I) {
+ assert(I->first.getNode() != N);
+ RemapValue(I->second);
+ }
- for (DenseMap<SDOperand, std::pair<SDOperand, SDOperand> >::iterator
- I = ExpandedFloats.begin(), E = ExpandedFloats.end(); I != E; ++I) {
- assert(I->first != N);
- if (I->second.first == N)
- I->second.first = Replacement;
- if (I->second.second == N)
- I->second.second = Replacement;
- }
+ for (DenseMap<SDValue, SDValue>::iterator I = SoftenedFloats.begin(),
+ E = SoftenedFloats.end(); I != E; ++I) {
+ assert(I->first.getNode() != N);
+ RemapValue(I->second);
+ }
- for (DenseMap<SDOperand, std::pair<SDOperand, SDOperand> >::iterator
- I = SplitVectors.begin(), E = SplitVectors.end(); I != E; ++I) {
- assert(I->first != N);
- if (I->second.first == N)
- I->second.first = Replacement;
- if (I->second.second == N)
- I->second.second = Replacement;
- }
+ 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);
-void DAGTypeLegalizer::SetPromotedInteger(SDOperand Op, SDOperand Result) {
- ExpungeNode(Result);
- AnalyzeNewNode(Result.Val);
+ for (unsigned i = 0, e = N->getNumValues(); i != e; ++i)
+ ReplacedValues.erase(SDValue(N, i));
+}
+
+void DAGTypeLegalizer::SetPromotedInteger(SDValue Op, SDValue Result) {
+ AnalyzeNewValue(Result);
- SDOperand &OpEntry = PromotedIntegers[Op];
- assert(OpEntry.Val == 0 && "Node is already promoted!");
+ SDValue &OpEntry = PromotedIntegers[Op];
+ assert(OpEntry.getNode() == 0 && "Node is already promoted!");
OpEntry = Result;
}
-void DAGTypeLegalizer::SetPromotedFloat(SDOperand Op, SDOperand Result) {
- ExpungeNode(Result);
- AnalyzeNewNode(Result.Val);
+void DAGTypeLegalizer::SetSoftenedFloat(SDValue Op, SDValue Result) {
+ AnalyzeNewValue(Result);
- SDOperand &OpEntry = PromotedFloats[Op];
- assert(OpEntry.Val == 0 && "Node is already converted to integer!");
+ SDValue &OpEntry = SoftenedFloats[Op];
+ assert(OpEntry.getNode() == 0 && "Node is already converted to integer!");
OpEntry = Result;
}
-void DAGTypeLegalizer::SetScalarizedVector(SDOperand Op, SDOperand Result) {
- ExpungeNode(Result);
- AnalyzeNewNode(Result.Val);
+void DAGTypeLegalizer::SetScalarizedVector(SDValue Op, SDValue Result) {
+ AnalyzeNewValue(Result);
- SDOperand &OpEntry = ScalarizedVectors[Op];
- assert(OpEntry.Val == 0 && "Node is already scalarized!");
+ SDValue &OpEntry = ScalarizedVectors[Op];
+ assert(OpEntry.getNode() == 0 && "Node is already scalarized!");
OpEntry = Result;
}
-void DAGTypeLegalizer::GetExpandedInteger(SDOperand Op, SDOperand &Lo,
- SDOperand &Hi) {
- std::pair<SDOperand, SDOperand> &Entry = ExpandedIntegers[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::SetExpandedInteger(SDOperand Op, SDOperand Lo,
- SDOperand Hi) {
- ExpungeNode(Lo);
- ExpungeNode(Hi);
-
+void DAGTypeLegalizer::SetExpandedInteger(SDValue Op, SDValue Lo,
+ SDValue Hi) {
// Lo/Hi may have been newly allocated, if so, add nodeid's as relevant.
- AnalyzeNewNode(Lo.Val);
- AnalyzeNewNode(Hi.Val);
+ AnalyzeNewValue(Lo);
+ AnalyzeNewValue(Hi);
// Remember that this is the result of the node.
- std::pair<SDOperand, SDOperand> &Entry = ExpandedIntegers[Op];
- assert(Entry.first.Val == 0 && "Node already expanded");
+ std::pair<SDValue, SDValue> &Entry = ExpandedIntegers[Op];
+ assert(Entry.first.getNode() == 0 && "Node already expanded");
Entry.first = Lo;
Entry.second = Hi;
}
-void DAGTypeLegalizer::GetExpandedFloat(SDOperand Op, SDOperand &Lo,
- SDOperand &Hi) {
- std::pair<SDOperand, SDOperand> &Entry = ExpandedFloats[Op];
- RemapNode(Entry.first);
- RemapNode(Entry.second);
- assert(Entry.first.Val && "Operand isn't expanded");
+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(SDOperand Op, SDOperand Lo,
- SDOperand Hi) {
- ExpungeNode(Lo);
- ExpungeNode(Hi);
-
+void DAGTypeLegalizer::SetExpandedFloat(SDValue Op, SDValue Lo,
+ SDValue Hi) {
// Lo/Hi may have been newly allocated, if so, add nodeid's as relevant.
- AnalyzeNewNode(Lo.Val);
- AnalyzeNewNode(Hi.Val);
+ AnalyzeNewValue(Lo);
+ AnalyzeNewValue(Hi);
// Remember that this is the result of the node.
- std::pair<SDOperand, SDOperand> &Entry = ExpandedFloats[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(SDOperand Op, SDOperand &Lo,
- SDOperand &Hi) {
- std::pair<SDOperand, SDOperand> &Entry = SplitVectors[Op];
- RemapNode(Entry.first);
- RemapNode(Entry.second);
- assert(Entry.first.Val && "Operand isn't split");
+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(SDOperand Op, SDOperand Lo,
- SDOperand Hi) {
- ExpungeNode(Lo);
- ExpungeNode(Hi);
-
+void DAGTypeLegalizer::SetSplitVector(SDValue Op, SDValue Lo,
+ SDValue Hi) {
// Lo/Hi may have been newly allocated, if so, add nodeid's as relevant.
- AnalyzeNewNode(Lo.Val);
- AnalyzeNewNode(Hi.Val);
+ AnalyzeNewValue(Lo);
+ AnalyzeNewValue(Hi);
// Remember that this is the result of the node.
- std::pair<SDOperand, SDOperand> &Entry = SplitVectors[Op];
- assert(Entry.first.Val == 0 && "Node already split");
+ std::pair<SDValue, SDValue> &Entry = SplitVectors[Op];
+ assert(Entry.first.getNode() == 0 && "Node already split");
Entry.first = Lo;
Entry.second = Hi;
}
+//===----------------------------------------------------------------------===//
+// Utilities.
+//===----------------------------------------------------------------------===//
+
/// BitConvertToInteger - Convert to an integer of the same size.
-SDOperand DAGTypeLegalizer::BitConvertToInteger(SDOperand Op) {
+SDValue DAGTypeLegalizer::BitConvertToInteger(SDValue Op) {
unsigned BitWidth = Op.getValueType().getSizeInBits();
return DAG.getNode(ISD::BIT_CONVERT, MVT::getIntegerVT(BitWidth), Op);
}
-SDOperand DAGTypeLegalizer::CreateStackStoreLoad(SDOperand Op,
- MVT DestVT) {
- // Create the stack frame object.
- SDOperand FIPtr = DAG.CreateStackTemporary(DestVT);
+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);
}
/// JoinIntegers - Build an integer with low bits Lo and high bits Hi.
-SDOperand DAGTypeLegalizer::JoinIntegers(SDOperand Lo, SDOperand Hi) {
+SDValue DAGTypeLegalizer::JoinIntegers(SDValue Lo, SDValue Hi) {
MVT LVT = Lo.getValueType();
MVT HVT = Hi.getValueType();
MVT NVT = MVT::getIntegerVT(LVT.getSizeInBits() + HVT.getSizeInBits());
/// SplitInteger - Return the lower LoVT bits of Op in Lo and the upper HiVT
/// bits in Hi.
-void DAGTypeLegalizer::SplitInteger(SDOperand Op,
+void DAGTypeLegalizer::SplitInteger(SDValue Op,
MVT LoVT, MVT HiVT,
- SDOperand &Lo, SDOperand &Hi) {
+ 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::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(SDOperand Op,
- SDOperand &Lo, SDOperand &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.
-SDOperand DAGTypeLegalizer::MakeLibCall(RTLIB::Libcall LC, MVT RetVT,
- const SDOperand *Ops, unsigned NumOps,
- bool isSigned) {
+SDValue DAGTypeLegalizer::MakeLibCall(RTLIB::Libcall LC, MVT RetVT,
+ const SDValue *Ops, unsigned NumOps,
+ bool isSigned) {
TargetLowering::ArgListTy Args;
Args.reserve(NumOps);
Entry.isZExt = !isSigned;
Args.push_back(Entry);
}
- SDOperand Callee = DAG.getExternalSymbol(TLI.getLibcallName(LC),
- TLI.getPointerTy());
+ SDValue Callee = DAG.getExternalSymbol(TLI.getLibcallName(LC),
+ TLI.getPointerTy());
const Type *RetTy = RetVT.getTypeForMVT();
- std::pair<SDOperand,SDOperand> CallInfo =
+ std::pair<SDValue,SDValue> CallInfo =
TLI.LowerCallTo(DAG.getEntryNode(), RetTy, isSigned, !isSigned, false,
- CallingConv::C, false, Callee, Args, DAG);
+ false, CallingConv::C, false, Callee, Args, DAG);
return CallInfo.first;
}
-SDOperand DAGTypeLegalizer::GetVectorElementPointer(SDOperand VecPtr, MVT EltVT,
- SDOperand Index) {
+/// 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);
+ }
+ 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);
+}
+
+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);
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);
+ }
+ }
+}
+
//===----------------------------------------------------------------------===//
// Entry Point
/// Note that this is an involved process that may invalidate pointers into
/// the graph.
void SelectionDAG::LegalizeTypes() {
- if (ViewLegalizeTypesDAGs) viewGraph();
-
DAGTypeLegalizer(*this).run();
}
projects / oota-llvm.git / blobdiff