VT = RC.getValueTypeNum(0);
continue;
}
-
- // In multiple RC's. If the Types of the RC's do not agree, return
- // MVT::Other. The target is responsible for handling this.
- if (VT != RC.getValueTypeNum(0))
- // FIXME2: when does this happen? Abort?
- return MVT::Other;
+
+ // If this occurs in multiple register classes, they all have to agree.
+ assert(VT == RC.getValueTypeNum(0));
}
return VT;
}
/// MatchedChainNodes - This maintains the position in the recorded nodes
/// array of all of the recorded input nodes that have chains.
SmallVector<unsigned, 2> MatchedChainNodes;
+
+ /// MatchedFlagResultNodes - This maintains the position in the recorded
+ /// nodes array of all of the recorded input nodes that have flag results.
+ SmallVector<unsigned, 2> MatchedFlagResultNodes;
+
+ /// MatchedComplexPatterns - This maintains a list of all of the
+ /// ComplexPatterns that we need to check. The patterns are known to have
+ /// names which were recorded. The second element of each pair is the first
+ /// slot number that the OPC_CheckComplexPat opcode drops the matched
+ /// results into.
+ SmallVector<std::pair<const TreePatternNode*,
+ unsigned>, 2> MatchedComplexPatterns;
/// PhysRegInputs - List list has an entry for each explicitly specified
/// physreg input to the pattern. The first elt is the Register node, the
/// second is the recorded slot number the input pattern match saved it in.
SmallVector<std::pair<Record*, unsigned>, 2> PhysRegInputs;
- /// EmittedMergeInputChains - For nodes that match patterns involving
- /// chains, is set to true if we emitted the "MergeInputChains" operation.
- bool EmittedMergeInputChains;
-
/// Matcher - This is the top level of the generated matcher, the result.
- MatcherNode *Matcher;
+ Matcher *TheMatcher;
/// CurPredicate - As we emit matcher nodes, this points to the latest check
/// which should have future checks stuck into its Next position.
- MatcherNode *CurPredicate;
+ Matcher *CurPredicate;
public:
MatcherGen(const PatternToMatch &pattern, const CodeGenDAGPatterns &cgp);
delete PatWithNoTypes;
}
- void EmitMatcherCode();
+ bool EmitMatcherCode(unsigned Variant);
void EmitResultCode();
- MatcherNode *GetMatcher() const { return Matcher; }
- MatcherNode *GetCurPredicate() const { return CurPredicate; }
+ Matcher *GetMatcher() const { return TheMatcher; }
+ Matcher *GetCurPredicate() const { return CurPredicate; }
private:
- void AddMatcherNode(MatcherNode *NewNode);
+ void AddMatcher(Matcher *NewNode);
void InferPossibleTypes();
// Matcher Generation.
MatcherGen::MatcherGen(const PatternToMatch &pattern,
const CodeGenDAGPatterns &cgp)
: Pattern(pattern), CGP(cgp), NextRecordedOperandNo(0),
- EmittedMergeInputChains(false), Matcher(0), CurPredicate(0) {
+ TheMatcher(0), CurPredicate(0) {
// We need to produce the matcher tree for the patterns source pattern. To do
// this we need to match the structure as well as the types. To do the type
// matching, we want to figure out the fewest number of type checks we need to
}
-/// AddMatcherNode - Add a matcher node to the current graph we're building.
-void MatcherGen::AddMatcherNode(MatcherNode *NewNode) {
+/// AddMatcher - Add a matcher node to the current graph we're building.
+void MatcherGen::AddMatcher(Matcher *NewNode) {
if (CurPredicate != 0)
CurPredicate->setNext(NewNode);
else
- Matcher = NewNode;
+ TheMatcher = NewNode;
CurPredicate = NewNode;
}
void MatcherGen::EmitLeafMatchCode(const TreePatternNode *N) {
assert(N->isLeaf() && "Not a leaf?");
- // If there are node predicates for this node, generate their checks.
- for (unsigned i = 0, e = N->getPredicateFns().size(); i != e; ++i)
- AddMatcherNode(new CheckPredicateMatcherNode(N->getPredicateFns()[i]));
-
// Direct match against an integer constant.
- if (IntInit *II = dynamic_cast<IntInit*>(N->getLeafValue()))
- return AddMatcherNode(new CheckIntegerMatcherNode(II->getValue()));
+ if (IntInit *II = dynamic_cast<IntInit*>(N->getLeafValue())) {
+ // If this is the root of the dag we're matching, we emit a redundant opcode
+ // check to ensure that this gets folded into the normal top-level
+ // OpcodeSwitch.
+ if (N == Pattern.getSrcPattern()) {
+ const SDNodeInfo &NI = CGP.getSDNodeInfo(CGP.getSDNodeNamed("imm"));
+ AddMatcher(new CheckOpcodeMatcher(NI));
+ }
+
+ return AddMatcher(new CheckIntegerMatcher(II->getValue()));
+ }
DefInit *DI = dynamic_cast<DefInit*>(N->getLeafValue());
if (DI == 0) {
// If we have a physreg reference like (mul gpr:$src, EAX) then we need to
// record the register
if (LeafRec->isSubClassOf("Register")) {
- AddMatcherNode(new RecordMatcherNode("physreg input "+LeafRec->getName()));
+ AddMatcher(new RecordMatcher("physreg input "+LeafRec->getName(),
+ NextRecordedOperandNo));
PhysRegInputs.push_back(std::make_pair(LeafRec, NextRecordedOperandNo++));
return;
}
if (LeafRec->isSubClassOf("ValueType"))
- return AddMatcherNode(new CheckValueTypeMatcherNode(LeafRec->getName()));
+ return AddMatcher(new CheckValueTypeMatcher(LeafRec->getName()));
if (LeafRec->isSubClassOf("CondCode"))
- return AddMatcherNode(new CheckCondCodeMatcherNode(LeafRec->getName()));
+ return AddMatcher(new CheckCondCodeMatcher(LeafRec->getName()));
if (LeafRec->isSubClassOf("ComplexPattern")) {
// We can't model ComplexPattern uses that don't have their name taken yet.
errs() << "We expect complex pattern uses to have names: " << *N << "\n";
exit(1);
}
-
- // Handle complex pattern.
- const ComplexPattern &CP = CGP.getComplexPattern(LeafRec);
- AddMatcherNode(new CheckComplexPatMatcherNode(CP));
-
- // If the complex pattern has a chain, then we need to keep track of the
- // fact that we just recorded a chain input. The chain input will be
- // matched as the last operand of the predicate if it was successful.
- if (CP.hasProperty(SDNPHasChain)) {
- // It is the last operand recorded.
- assert(NextRecordedOperandNo > 1 &&
- "Should have recorded input/result chains at least!");
- MatchedChainNodes.push_back(NextRecordedOperandNo-1);
- // If we need to check chains, do so, see comment for
- // "NodeHasProperty(SDNPHasChain" below.
- if (MatchedChainNodes.size() > 1) {
- // FIXME2: This is broken, we should eliminate this nonsense completely,
- // but we want to produce the same selections that the old matcher does
- // for now.
- unsigned PrevOp = MatchedChainNodes[MatchedChainNodes.size()-2];
- AddMatcherNode(new CheckChainCompatibleMatcherNode(PrevOp));
- }
- }
+ // Remember this ComplexPattern so that we can emit it after all the other
+ // structural matches are done.
+ MatchedComplexPatterns.push_back(std::make_pair(N, 0));
return;
}
N->getPredicateFns().empty()) {
if (IntInit *II = dynamic_cast<IntInit*>(N->getChild(1)->getLeafValue())) {
if (!isPowerOf2_32(II->getValue())) { // Don't bother with single bits.
+ // If this is at the root of the pattern, we emit a redundant
+ // CheckOpcode so that the following checks get factored properly under
+ // a single opcode check.
+ if (N == Pattern.getSrcPattern())
+ AddMatcher(new CheckOpcodeMatcher(CInfo));
+
+ // Emit the CheckAndImm/CheckOrImm node.
if (N->getOperator()->getName() == "and")
- AddMatcherNode(new CheckAndImmMatcherNode(II->getValue()));
+ AddMatcher(new CheckAndImmMatcher(II->getValue()));
else
- AddMatcherNode(new CheckOrImmMatcherNode(II->getValue()));
+ AddMatcher(new CheckOrImmMatcher(II->getValue()));
// Match the LHS of the AND as appropriate.
- AddMatcherNode(new MoveChildMatcherNode(0));
+ AddMatcher(new MoveChildMatcher(0));
EmitMatchCode(N->getChild(0), NodeNoTypes->getChild(0));
- AddMatcherNode(new MoveParentMatcherNode());
+ AddMatcher(new MoveParentMatcher());
return;
}
}
}
// Check that the current opcode lines up.
- AddMatcherNode(new CheckOpcodeMatcherNode(CInfo.getEnumName()));
-
- // If there are node predicates for this node, generate their checks.
- for (unsigned i = 0, e = N->getPredicateFns().size(); i != e; ++i)
- AddMatcherNode(new CheckPredicateMatcherNode(N->getPredicateFns()[i]));
-
+ AddMatcher(new CheckOpcodeMatcher(CInfo));
// If this node has memory references (i.e. is a load or store), tell the
// interpreter to capture them in the memref array.
if (N->NodeHasProperty(SDNPMemOperand, CGP))
- AddMatcherNode(new RecordMemRefMatcherNode());
+ AddMatcher(new RecordMemRefMatcher());
// If this node has a chain, then the chain is operand #0 is the SDNode, and
// the child numbers of the node are all offset by one.
unsigned OpNo = 0;
if (N->NodeHasProperty(SDNPHasChain, CGP)) {
// Record the node and remember it in our chained nodes list.
- AddMatcherNode(new RecordMatcherNode("'" + N->getOperator()->getName() +
- "' chained node"));
+ AddMatcher(new RecordMatcher("'" + N->getOperator()->getName() +
+ "' chained node",
+ NextRecordedOperandNo));
// Remember all of the input chains our pattern will match.
MatchedChainNodes.push_back(NextRecordedOperandNo++);
- // If this is the second (e.g. indbr(load) or store(add(load))) or third
- // input chain (e.g. (store (add (load, load))) from msp430) we need to make
- // sure that folding the chain won't induce cycles in the DAG. This could
- // happen if there were an intermediate node between the indbr and load, for
- // example.
- if (MatchedChainNodes.size() > 1) {
- // FIXME2: This is broken, we should eliminate this nonsense completely,
- // but we want to produce the same selections that the old matcher does
- // for now.
- unsigned PrevOp = MatchedChainNodes[MatchedChainNodes.size()-2];
- AddMatcherNode(new CheckChainCompatibleMatcherNode(PrevOp));
- }
-
// Don't look at the input chain when matching the tree pattern to the
// SDNode.
OpNo = 1;
}
if (NeedCheck)
- AddMatcherNode(new CheckFoldableChainNodeMatcherNode());
+ AddMatcher(new CheckFoldableChainNodeMatcher());
}
}
+
+ // If this node has an output flag and isn't the root, remember it.
+ if (N->NodeHasProperty(SDNPOutFlag, CGP) &&
+ N != Pattern.getSrcPattern()) {
+ // TODO: This redundantly records nodes with both flags and chains.
+
+ // Record the node and remember it in our chained nodes list.
+ AddMatcher(new RecordMatcher("'" + N->getOperator()->getName() +
+ "' flag output node",
+ NextRecordedOperandNo));
+ // Remember all of the nodes with output flags our pattern will match.
+ MatchedFlagResultNodes.push_back(NextRecordedOperandNo++);
+ }
// If this node is known to have an input flag or if it *might* have an input
// flag, capture it as the flag input of the pattern.
if (N->NodeHasProperty(SDNPOptInFlag, CGP) ||
N->NodeHasProperty(SDNPInFlag, CGP))
- AddMatcherNode(new CaptureFlagInputMatcherNode());
+ AddMatcher(new CaptureFlagInputMatcher());
for (unsigned i = 0, e = N->getNumChildren(); i != e; ++i, ++OpNo) {
// Get the code suitable for matching this child. Move to the child, check
// it then move back to the parent.
- AddMatcherNode(new MoveChildMatcherNode(OpNo));
+ AddMatcher(new MoveChildMatcher(OpNo));
EmitMatchCode(N->getChild(i), NodeNoTypes->getChild(i));
- AddMatcherNode(new MoveParentMatcherNode());
+ AddMatcher(new MoveParentMatcher());
}
}
// If N and NodeNoTypes don't agree on a type, then this is a case where we
// need to do a type check. Emit the check, apply the tyep to NodeNoTypes and
// reinfer any correlated types.
- if (NodeNoTypes->getExtTypes() != N->getExtTypes()) {
- AddMatcherNode(new CheckTypeMatcherNode(N->getTypeNum(0)));
- NodeNoTypes->setTypes(N->getExtTypes());
+ bool DoTypeCheck = false;
+ if (NodeNoTypes->getNumTypes() != 0 &&
+ NodeNoTypes->getExtType(0) != N->getExtType(0)) {
+ assert(NodeNoTypes->getNumTypes() == 1 && "FIXME: Handle multiple results");
+ NodeNoTypes->setType(0, N->getExtType(0));
InferPossibleTypes();
+ DoTypeCheck = true;
}
// If this node has a name associated with it, capture it in VariableMap. If
if (!N->getName().empty()) {
unsigned &VarMapEntry = VariableMap[N->getName()];
if (VarMapEntry == 0) {
- VarMapEntry = NextRecordedOperandNo+1;
-
- unsigned NumRecorded;
-
- // If this is a complex pattern, the match operation for it will
- // implicitly record all of the outputs of it (which may be more than
- // one).
- if (const ComplexPattern *CP = N->getComplexPatternInfo(CGP)) {
- // Record the right number of operands.
- NumRecorded = CP->getNumOperands();
-
- if (CP->hasProperty(SDNPHasChain))
- ++NumRecorded; // Chained node operand.
- } else {
- // If it is a normal named node, we must emit a 'Record' opcode.
- AddMatcherNode(new RecordMatcherNode("$" + N->getName()));
- NumRecorded = 1;
- }
- NextRecordedOperandNo += NumRecorded;
-
+ // If it is a named node, we must emit a 'Record' opcode.
+ AddMatcher(new RecordMatcher("$" + N->getName(), NextRecordedOperandNo));
+ VarMapEntry = ++NextRecordedOperandNo;
} else {
// If we get here, this is a second reference to a specific name. Since
// we already have checked that the first reference is valid, we don't
// have to recursively match it, just check that it's the same as the
// previously named thing.
- AddMatcherNode(new CheckSameMatcherNode(VarMapEntry-1));
+ AddMatcher(new CheckSameMatcher(VarMapEntry-1));
return;
}
}
EmitLeafMatchCode(N);
else
EmitOperatorMatchCode(N, NodeNoTypes);
+
+ // If there are node predicates for this node, generate their checks.
+ for (unsigned i = 0, e = N->getPredicateFns().size(); i != e; ++i)
+ AddMatcher(new CheckPredicateMatcher(N->getPredicateFns()[i]));
+
+ if (DoTypeCheck) {
+ assert(N->getNumTypes() == 1);
+ AddMatcher(new CheckTypeMatcher(N->getType(0)));
+ }
}
-void MatcherGen::EmitMatcherCode() {
+/// EmitMatcherCode - Generate the code that matches the predicate of this
+/// pattern for the specified Variant. If the variant is invalid this returns
+/// true and does not generate code, if it is valid, it returns false.
+bool MatcherGen::EmitMatcherCode(unsigned Variant) {
+ // If the root of the pattern is a ComplexPattern and if it is specified to
+ // match some number of root opcodes, these are considered to be our variants.
+ // Depending on which variant we're generating code for, emit the root opcode
+ // check.
+ if (const ComplexPattern *CP =
+ Pattern.getSrcPattern()->getComplexPatternInfo(CGP)) {
+ const std::vector<Record*> &OpNodes = CP->getRootNodes();
+ assert(!OpNodes.empty() &&"Complex Pattern must specify what it can match");
+ if (Variant >= OpNodes.size()) return true;
+
+ AddMatcher(new CheckOpcodeMatcher(CGP.getSDNodeInfo(OpNodes[Variant])));
+ } else {
+ if (Variant != 0) return true;
+ }
+
+ // Emit the matcher for the pattern structure and types.
+ EmitMatchCode(Pattern.getSrcPattern(), PatWithNoTypes);
+
// If the pattern has a predicate on it (e.g. only enabled when a subtarget
// feature is around, do the check).
if (!Pattern.getPredicateCheck().empty())
- AddMatcherNode(new
- CheckPatternPredicateMatcherNode(Pattern.getPredicateCheck()));
+ AddMatcher(new CheckPatternPredicateMatcher(Pattern.getPredicateCheck()));
+
+ // Now that we've completed the structural type match, emit any ComplexPattern
+ // checks (e.g. addrmode matches). We emit this after the structural match
+ // because they are generally more expensive to evaluate and more difficult to
+ // factor.
+ for (unsigned i = 0, e = MatchedComplexPatterns.size(); i != e; ++i) {
+ const TreePatternNode *N = MatchedComplexPatterns[i].first;
+
+ // Remember where the results of this match get stuck.
+ MatchedComplexPatterns[i].second = NextRecordedOperandNo;
+
+ // Get the slot we recorded the value in from the name on the node.
+ unsigned RecNodeEntry = VariableMap[N->getName()];
+ assert(!N->getName().empty() && RecNodeEntry &&
+ "Complex pattern should have a name and slot");
+ --RecNodeEntry; // Entries in VariableMap are biased.
+
+ const ComplexPattern &CP =
+ CGP.getComplexPattern(((DefInit*)N->getLeafValue())->getDef());
+
+ // Emit a CheckComplexPat operation, which does the match (aborting if it
+ // fails) and pushes the matched operands onto the recorded nodes list.
+ AddMatcher(new CheckComplexPatMatcher(CP, RecNodeEntry,
+ N->getName(), NextRecordedOperandNo));
+
+ // Record the right number of operands.
+ NextRecordedOperandNo += CP.getNumOperands();
+ if (CP.hasProperty(SDNPHasChain)) {
+ // If the complex pattern has a chain, then we need to keep track of the
+ // fact that we just recorded a chain input. The chain input will be
+ // matched as the last operand of the predicate if it was successful.
+ ++NextRecordedOperandNo; // Chained node operand.
+
+ // It is the last operand recorded.
+ assert(NextRecordedOperandNo > 1 &&
+ "Should have recorded input/result chains at least!");
+ MatchedChainNodes.push_back(NextRecordedOperandNo-1);
+ }
+
+ // TODO: Complex patterns can't have output flags, if they did, we'd want
+ // to record them.
+ }
- // Emit the matcher for the pattern structure and types.
- EmitMatchCode(Pattern.getSrcPattern(), PatWithNoTypes);
+ return false;
}
SmallVectorImpl<unsigned> &ResultOps){
assert(!N->getName().empty() && "Operand not named!");
- unsigned SlotNo = getNamedArgumentSlot(N->getName());
-
// A reference to a complex pattern gets all of the results of the complex
// pattern's match.
if (const ComplexPattern *CP = N->getComplexPatternInfo(CGP)) {
+ unsigned SlotNo = 0;
+ for (unsigned i = 0, e = MatchedComplexPatterns.size(); i != e; ++i)
+ if (MatchedComplexPatterns[i].first->getName() == N->getName()) {
+ SlotNo = MatchedComplexPatterns[i].second;
+ break;
+ }
+ assert(SlotNo != 0 && "Didn't get a slot number assigned?");
+
+ // The first slot entry is the node itself, the subsequent entries are the
+ // matched values.
for (unsigned i = 0, e = CP->getNumOperands(); i != e; ++i)
ResultOps.push_back(SlotNo+i);
return;
}
+ unsigned SlotNo = getNamedArgumentSlot(N->getName());
+
// If this is an 'imm' or 'fpimm' node, make sure to convert it to the target
// version of the immediate so that it doesn't get selected due to some other
// node use.
if (!N->isLeaf()) {
StringRef OperatorName = N->getOperator()->getName();
if (OperatorName == "imm" || OperatorName == "fpimm") {
- AddMatcherNode(new EmitConvertToTargetMatcherNode(SlotNo));
+ AddMatcher(new EmitConvertToTargetMatcher(SlotNo));
ResultOps.push_back(NextRecordedOperandNo++);
return;
}
assert(N->isLeaf() && "Must be a leaf");
if (IntInit *II = dynamic_cast<IntInit*>(N->getLeafValue())) {
- AddMatcherNode(new EmitIntegerMatcherNode(II->getValue(),N->getTypeNum(0)));
+ AddMatcher(new EmitIntegerMatcher(II->getValue(), N->getType(0)));
ResultOps.push_back(NextRecordedOperandNo++);
return;
}
// If this is an explicit register reference, handle it.
if (DefInit *DI = dynamic_cast<DefInit*>(N->getLeafValue())) {
if (DI->getDef()->isSubClassOf("Register")) {
- AddMatcherNode(new EmitRegisterMatcherNode(DI->getDef(),
- N->getTypeNum(0)));
+ AddMatcher(new EmitRegisterMatcher(DI->getDef(), N->getType(0)));
ResultOps.push_back(NextRecordedOperandNo++);
return;
}
if (DI->getDef()->getName() == "zero_reg") {
- AddMatcherNode(new EmitRegisterMatcherNode(0, N->getTypeNum(0)));
+ AddMatcher(new EmitRegisterMatcher(0, N->getType(0)));
ResultOps.push_back(NextRecordedOperandNo++);
return;
}
// in COPY_TO_SUBREG instructions.
if (DI->getDef()->isSubClassOf("RegisterClass")) {
std::string Value = getQualifiedName(DI->getDef()) + "RegClassID";
- AddMatcherNode(new EmitStringIntegerMatcherNode(Value, N->getTypeNum(0)));
+ AddMatcher(new EmitStringIntegerMatcher(Value, MVT::i32));
ResultOps.push_back(NextRecordedOperandNo++);
return;
}
SmallVectorImpl<unsigned> &OutputOps) {
Record *Op = N->getOperator();
const CodeGenTarget &CGT = CGP.getTargetInfo();
- CodeGenInstruction &II = CGT.getInstruction(Op->getName());
+ CodeGenInstruction &II = CGT.getInstruction(Op);
const DAGInstruction &Inst = CGP.getInstruction(Op);
// If we can, get the pattern for the instruction we're generating. We derive
bool isRoot = N == Pattern.getDstPattern();
- // NodeHasOutFlag - True if this node has a flag.
- bool NodeHasInFlag = false, NodeHasOutFlag = false;
+ // TreeHasOutFlag - True if this tree has a flag.
+ bool TreeHasInFlag = false, TreeHasOutFlag = false;
if (isRoot) {
const TreePatternNode *SrcPat = Pattern.getSrcPattern();
- NodeHasInFlag = SrcPat->TreeHasProperty(SDNPOptInFlag, CGP) ||
+ TreeHasInFlag = SrcPat->TreeHasProperty(SDNPOptInFlag, CGP) ||
SrcPat->TreeHasProperty(SDNPInFlag, CGP);
// FIXME2: this is checking the entire pattern, not just the node in
// question, doing this just for the root seems like a total hack.
- NodeHasOutFlag = SrcPat->TreeHasProperty(SDNPOutFlag, CGP);
+ TreeHasOutFlag = SrcPat->TreeHasProperty(SDNPOutFlag, CGP);
}
// NumResults - This is the number of results produced by the instruction in
++ChildNo;
}
- // Nodes that match patterns with (potentially multiple) chain inputs have to
- // merge them together into a token factor.
- if (NodeHasChain && !EmittedMergeInputChains) {
- // FIXME2: Move this out of emitresult to a top level place.
- assert(!MatchedChainNodes.empty() &&
- "How can this node have chain if no inputs do?");
- // Otherwise, we have to emit an operation to merge the input chains and
- // set this as the current input chain.
- AddMatcherNode(new EmitMergeInputChainsMatcherNode
- (MatchedChainNodes.data(), MatchedChainNodes.size()));
- EmittedMergeInputChains = true;
- }
-
// If this node has an input flag or explicitly specified input physregs, we
// need to add chained and flagged copyfromreg nodes and materialize the flag
// input.
// Emit all of the CopyToReg nodes for the input physical registers. These
// occur in patterns like (mul:i8 AL:i8, GR8:i8:$src).
for (unsigned i = 0, e = PhysRegInputs.size(); i != e; ++i)
- AddMatcherNode(new EmitCopyToRegMatcherNode(PhysRegInputs[i].second,
- PhysRegInputs[i].first));
+ AddMatcher(new EmitCopyToRegMatcher(PhysRegInputs[i].second,
+ PhysRegInputs[i].first));
// Even if the node has no other flag inputs, the resultant node must be
// flagged to the CopyFromReg nodes we just generated.
- NodeHasInFlag = true;
+ TreeHasInFlag = true;
}
// Result order: node results, chain, flags
// Determine the result types.
SmallVector<MVT::SimpleValueType, 4> ResultVTs;
- if (NumResults > 0 && N->getTypeNum(0) != MVT::isVoid) {
+ if (N->getNumTypes()) {
// FIXME2: If the node has multiple results, we should add them. For now,
// preserve existing behavior?!
- ResultVTs.push_back(N->getTypeNum(0));
+ assert(N->getNumTypes() == 1);
+ ResultVTs.push_back(N->getType(0));
}
-
// If this is the root instruction of a pattern that has physical registers in
// its result pattern, add output VTs for them. For example, X86 has:
// This also handles implicit results like:
// (implicit EFLAGS)
if (isRoot && Pattern.getDstRegs().size() != 0) {
- for (unsigned i = 0; i != Pattern.getDstRegs().size(); ++i)
- if (Pattern.getDstRegs()[i]->isSubClassOf("Register"))
- ResultVTs.push_back(getRegisterValueType(Pattern.getDstRegs()[i], CGT));
+ // If the root came from an implicit def in the instruction handling stuff,
+ // don't re-add it.
+ Record *HandledReg = 0;
+ if (NumResults == 0 && N->getNumTypes() != 0 &&
+ !II.ImplicitDefs.empty())
+ HandledReg = II.ImplicitDefs[0];
+
+ for (unsigned i = 0; i != Pattern.getDstRegs().size(); ++i) {
+ Record *Reg = Pattern.getDstRegs()[i];
+ if (!Reg->isSubClassOf("Register") || Reg == HandledReg) continue;
+ ResultVTs.push_back(getRegisterValueType(Reg, CGT));
+ }
}
- if (NodeHasChain)
- ResultVTs.push_back(MVT::Other);
- if (NodeHasOutFlag)
- ResultVTs.push_back(MVT::Flag);
-
- // FIXME2: Instead of using the isVariadic flag on the instruction, we should
- // have an SDNP that indicates variadicism. The TargetInstrInfo isVariadic
- // property should be inferred from this when an instruction has a pattern.
+
+ // If this is the root of the pattern and the pattern we're matching includes
+ // a node that is variadic, mark the generated node as variadic so that it
+ // gets the excess operands from the input DAG.
int NumFixedArityOperands = -1;
- if (isRoot && II.isVariadic)
+ if (isRoot &&
+ (Pattern.getSrcPattern()->NodeHasProperty(SDNPVariadic, CGP)))
NumFixedArityOperands = Pattern.getSrcPattern()->getNumChildren();
// If this is the root node and any of the nodes matched nodes in the input
bool NodeHasMemRefs =
isRoot && Pattern.getSrcPattern()->TreeHasProperty(SDNPMemOperand, CGP);
- // FIXME: Eventually add a SelectNodeTo form. It works if the new node has a
- // superset of the results of the old node, in the same places. E.g. turning
- // (add (load)) -> add32rm is ok because result #0 is the result and result #1
- // is new.
- AddMatcherNode(new EmitNodeMatcherNode(II.Namespace+"::"+II.TheDef->getName(),
- ResultVTs.data(), ResultVTs.size(),
- InstOps.data(), InstOps.size(),
- NodeHasChain, NodeHasInFlag,
- NodeHasMemRefs,NumFixedArityOperands));
-
- // The newly emitted node gets recorded.
- // FIXME2: This should record all of the results except the (implicit) one.
- OutputOps.push_back(NextRecordedOperandNo++);
-
-
- // FIXME2: Kill off all the SelectionDAG::SelectNodeTo and getMachineNode
- // variants. Call MorphNodeTo instead of SelectNodeTo.
+ AddMatcher(new EmitNodeMatcher(II.Namespace+"::"+II.TheDef->getName(),
+ ResultVTs.data(), ResultVTs.size(),
+ InstOps.data(), InstOps.size(),
+ NodeHasChain, TreeHasInFlag, TreeHasOutFlag,
+ NodeHasMemRefs, NumFixedArityOperands,
+ NextRecordedOperandNo));
+
+ // The non-chain and non-flag results of the newly emitted node get recorded.
+ for (unsigned i = 0, e = ResultVTs.size(); i != e; ++i) {
+ if (ResultVTs[i] == MVT::Other || ResultVTs[i] == MVT::Flag) break;
+ OutputOps.push_back(NextRecordedOperandNo++);
+ }
}
void MatcherGen::
// The input currently must have produced exactly one result.
assert(InputOps.size() == 1 && "Unexpected input to SDNodeXForm");
- AddMatcherNode(new EmitNodeXFormMatcherNode(InputOps[0], N->getOperator()));
+ AddMatcher(new EmitNodeXFormMatcher(InputOps[0], N->getOperator()));
ResultOps.push_back(NextRecordedOperandNo++);
}
}
void MatcherGen::EmitResultCode() {
+ // Patterns that match nodes with (potentially multiple) chain inputs have to
+ // merge them together into a token factor. This informs the generated code
+ // what all the chained nodes are.
+ if (!MatchedChainNodes.empty())
+ AddMatcher(new EmitMergeInputChainsMatcher
+ (MatchedChainNodes.data(), MatchedChainNodes.size()));
+
+ // Codegen the root of the result pattern, capturing the resulting values.
SmallVector<unsigned, 8> Ops;
EmitResultOperand(Pattern.getDstPattern(), Ops);
- // We know that the resulting pattern has exactly one result/
- // FIXME2: why? what about something like (set a,b,c, (complexpat))
- // FIXME2: Implicit results should be pushed here I guess?
- assert(Ops.size() == 1);
- // FIXME: Handle Ops.
- // FIXME: Handle (set EAX, (foo)) but not (implicit EFLAGS)
-
- AddMatcherNode(new PatternMarkerMatcherNode(Pattern));
+ // At this point, we have however many values the result pattern produces.
+ // However, the input pattern might not need all of these. If there are
+ // excess values at the end (such as condition codes etc) just lop them off.
+ // This doesn't need to worry about flags or chains, just explicit results.
+ //
+ // FIXME2: This doesn't work because there is currently no way to get an
+ // accurate count of the # results the source pattern sets. This is because
+ // of the "parallel" construct in X86 land, which looks like this:
+ //
+ //def : Pat<(parallel (X86and_flag GR8:$src1, GR8:$src2),
+ // (implicit EFLAGS)),
+ // (AND8rr GR8:$src1, GR8:$src2)>;
+ //
+ // This idiom means to match the two-result node X86and_flag (which is
+ // declared as returning a single result, because we can't match multi-result
+ // nodes yet). In this case, we would have to know that the input has two
+ // results. However, mul8r is modelled exactly the same way, but without
+ // implicit defs included. The fix is to support multiple results directly
+ // and eliminate 'parallel'.
+ //
+ // FIXME2: When this is fixed, we should revert the terrible hack in the
+ // OPC_EmitNode code in the interpreter.
+#if 0
+ const TreePatternNode *Src = Pattern.getSrcPattern();
+ unsigned NumSrcResults = Src->getTypeNum(0) != MVT::isVoid ? 1 : 0;
+ NumSrcResults += Pattern.getDstRegs().size();
+ assert(Ops.size() >= NumSrcResults && "Didn't provide enough results");
+ Ops.resize(NumSrcResults);
+#endif
+
+ // If the matched pattern covers nodes which define a flag result, emit a node
+ // that tells the matcher about them so that it can update their results.
+ if (!MatchedFlagResultNodes.empty())
+ AddMatcher(new MarkFlagResultsMatcher(MatchedFlagResultNodes.data(),
+ MatchedFlagResultNodes.size()));
+
+ AddMatcher(new CompleteMatchMatcher(Ops.data(), Ops.size(), Pattern));
}
-MatcherNode *llvm::ConvertPatternToMatcher(const PatternToMatch &Pattern,
- const CodeGenDAGPatterns &CGP) {
+/// ConvertPatternToMatcher - Create the matcher for the specified pattern with
+/// the specified variant. If the variant number is invalid, this returns null.
+Matcher *llvm::ConvertPatternToMatcher(const PatternToMatch &Pattern,
+ unsigned Variant,
+ const CodeGenDAGPatterns &CGP) {
MatcherGen Gen(Pattern, CGP);
// Generate the code for the matcher.
- Gen.EmitMatcherCode();
-
+ if (Gen.EmitMatcherCode(Variant))
+ return 0;
// FIXME2: Kill extra MoveParent commands at the end of the matcher sequence.
// FIXME2: Split result code out to another table, and make the matcher end
projects / oota-llvm.git / blobdiff