DAGISelMatcherGen.cpp [plain text]
#include "DAGISelMatcher.h"
#include "CodeGenDAGPatterns.h"
#include "CodeGenRegisters.h"
#include "llvm/ADT/DenseMap.h"
#include "llvm/ADT/SmallVector.h"
#include "llvm/ADT/StringMap.h"
#include "llvm/TableGen/Error.h"
#include "llvm/TableGen/Record.h"
#include <utility>
using namespace llvm;
static MVT::SimpleValueType getRegisterValueType(Record *R,
const CodeGenTarget &T) {
bool FoundRC = false;
MVT::SimpleValueType VT = MVT::Other;
const CodeGenRegister *Reg = T.getRegBank().getReg(R);
ArrayRef<CodeGenRegisterClass*> RCs = T.getRegBank().getRegClasses();
for (unsigned rc = 0, e = RCs.size(); rc != e; ++rc) {
const CodeGenRegisterClass &RC = *RCs[rc];
if (!RC.contains(Reg))
continue;
if (!FoundRC) {
FoundRC = true;
VT = RC.getValueTypeNum(0);
continue;
}
assert(VT == RC.getValueTypeNum(0));
}
return VT;
}
namespace {
class MatcherGen {
const PatternToMatch &Pattern;
const CodeGenDAGPatterns &CGP;
TreePatternNode *PatWithNoTypes;
StringMap<unsigned> VariableMap;
unsigned NextRecordedOperandNo;
SmallVector<unsigned, 2> MatchedChainNodes;
SmallVector<unsigned, 2> MatchedGlueResultNodes;
SmallVector<std::pair<const TreePatternNode*,
unsigned>, 2> MatchedComplexPatterns;
SmallVector<std::pair<Record*, unsigned>, 2> PhysRegInputs;
Matcher *TheMatcher;
Matcher *CurPredicate;
public:
MatcherGen(const PatternToMatch &pattern, const CodeGenDAGPatterns &cgp);
~MatcherGen() {
delete PatWithNoTypes;
}
bool EmitMatcherCode(unsigned Variant);
void EmitResultCode();
Matcher *GetMatcher() const { return TheMatcher; }
private:
void AddMatcher(Matcher *NewNode);
void InferPossibleTypes();
void EmitMatchCode(const TreePatternNode *N, TreePatternNode *NodeNoTypes);
void EmitLeafMatchCode(const TreePatternNode *N);
void EmitOperatorMatchCode(const TreePatternNode *N,
TreePatternNode *NodeNoTypes);
unsigned getNamedArgumentSlot(StringRef Name) {
unsigned VarMapEntry = VariableMap[Name];
assert(VarMapEntry != 0 &&
"Variable referenced but not defined and not caught earlier!");
return VarMapEntry-1;
}
const TreePatternNode *GetInstPatternNode(const DAGInstruction &Ins,
const TreePatternNode *N);
void EmitResultOperand(const TreePatternNode *N,
SmallVectorImpl<unsigned> &ResultOps);
void EmitResultOfNamedOperand(const TreePatternNode *N,
SmallVectorImpl<unsigned> &ResultOps);
void EmitResultLeafAsOperand(const TreePatternNode *N,
SmallVectorImpl<unsigned> &ResultOps);
void EmitResultInstructionAsOperand(const TreePatternNode *N,
SmallVectorImpl<unsigned> &ResultOps);
void EmitResultSDNodeXFormAsOperand(const TreePatternNode *N,
SmallVectorImpl<unsigned> &ResultOps);
};
}
MatcherGen::MatcherGen(const PatternToMatch &pattern,
const CodeGenDAGPatterns &cgp)
: Pattern(pattern), CGP(cgp), NextRecordedOperandNo(0),
TheMatcher(0), CurPredicate(0) {
PatWithNoTypes = Pattern.getSrcPattern()->clone();
PatWithNoTypes->RemoveAllTypes();
InferPossibleTypes();
}
void MatcherGen::InferPossibleTypes() {
TreePattern &TP = *CGP.pf_begin()->second;
bool MadeChange = true;
while (MadeChange)
MadeChange = PatWithNoTypes->ApplyTypeConstraints(TP,
true);
}
void MatcherGen::AddMatcher(Matcher *NewNode) {
if (CurPredicate != 0)
CurPredicate->setNext(NewNode);
else
TheMatcher = NewNode;
CurPredicate = NewNode;
}
void MatcherGen::EmitLeafMatchCode(const TreePatternNode *N) {
assert(N->isLeaf() && "Not a leaf?");
if (IntInit *II = dyn_cast<IntInit>(N->getLeafValue())) {
if (N == Pattern.getSrcPattern()) {
const SDNodeInfo &NI = CGP.getSDNodeInfo(CGP.getSDNodeNamed("imm"));
AddMatcher(new CheckOpcodeMatcher(NI));
}
return AddMatcher(new CheckIntegerMatcher(II->getValue()));
}
if (N->getLeafValue() == UnsetInit::get()) {
assert(N->hasName() && "Unnamed ? leaf");
return;
}
DefInit *DI = dyn_cast<DefInit>(N->getLeafValue());
if (DI == 0) {
errs() << "Unknown leaf kind: " << *N << "\n";
abort();
}
Record *LeafRec = DI->getDef();
if (LeafRec->isSubClassOf("ValueType")) {
if (N->hasName())
return;
return AddMatcher(new CheckValueTypeMatcher(LeafRec->getName()));
}
if ( LeafRec->isSubClassOf("RegisterClass") ||
LeafRec->isSubClassOf("RegisterOperand") ||
LeafRec->isSubClassOf("PointerLikeRegClass") ||
LeafRec->isSubClassOf("SubRegIndex") ||
LeafRec->getName() == "srcvalue")
return;
if (LeafRec->isSubClassOf("Register")) {
AddMatcher(new RecordMatcher("physreg input "+LeafRec->getName(),
NextRecordedOperandNo));
PhysRegInputs.push_back(std::make_pair(LeafRec, NextRecordedOperandNo++));
return;
}
if (LeafRec->isSubClassOf("CondCode"))
return AddMatcher(new CheckCondCodeMatcher(LeafRec->getName()));
if (LeafRec->isSubClassOf("ComplexPattern")) {
if (N->getName().empty()) {
errs() << "We expect complex pattern uses to have names: " << *N << "\n";
exit(1);
}
MatchedComplexPatterns.push_back(std::make_pair(N, 0));
return;
}
errs() << "Unknown leaf kind: " << *N << "\n";
abort();
}
void MatcherGen::EmitOperatorMatchCode(const TreePatternNode *N,
TreePatternNode *NodeNoTypes) {
assert(!N->isLeaf() && "Not an operator?");
const SDNodeInfo &CInfo = CGP.getSDNodeInfo(N->getOperator());
if ((N->getOperator()->getName() == "and" ||
N->getOperator()->getName() == "or") &&
N->getChild(1)->isLeaf() && N->getChild(1)->getPredicateFns().empty() &&
N->getPredicateFns().empty()) {
if (IntInit *II = dyn_cast<IntInit>(N->getChild(1)->getLeafValue())) {
if (!isPowerOf2_32(II->getValue())) { if (N == Pattern.getSrcPattern())
AddMatcher(new CheckOpcodeMatcher(CInfo));
if (N->getOperator()->getName() == "and")
AddMatcher(new CheckAndImmMatcher(II->getValue()));
else
AddMatcher(new CheckOrImmMatcher(II->getValue()));
AddMatcher(new MoveChildMatcher(0));
EmitMatchCode(N->getChild(0), NodeNoTypes->getChild(0));
AddMatcher(new MoveParentMatcher());
return;
}
}
}
AddMatcher(new CheckOpcodeMatcher(CInfo));
if (N->NodeHasProperty(SDNPMemOperand, CGP))
AddMatcher(new RecordMemRefMatcher());
unsigned OpNo = 0;
if (N->NodeHasProperty(SDNPHasChain, CGP)) {
AddMatcher(new RecordMatcher("'" + N->getOperator()->getName() +
"' chained node",
NextRecordedOperandNo));
MatchedChainNodes.push_back(NextRecordedOperandNo++);
OpNo = 1;
const TreePatternNode *Root = Pattern.getSrcPattern();
if (N != Root) { bool NeedCheck = !Root->hasChild(N);
if (!NeedCheck) {
const SDNodeInfo &PInfo = CGP.getSDNodeInfo(Root->getOperator());
NeedCheck =
Root->getOperator() == CGP.get_intrinsic_void_sdnode() ||
Root->getOperator() == CGP.get_intrinsic_w_chain_sdnode() ||
Root->getOperator() == CGP.get_intrinsic_wo_chain_sdnode() ||
PInfo.getNumOperands() > 1 ||
PInfo.hasProperty(SDNPHasChain) ||
PInfo.hasProperty(SDNPInGlue) ||
PInfo.hasProperty(SDNPOptInGlue);
}
if (NeedCheck)
AddMatcher(new CheckFoldableChainNodeMatcher());
}
}
if (N->NodeHasProperty(SDNPOutGlue, CGP) &&
N != Pattern.getSrcPattern()) {
AddMatcher(new RecordMatcher("'" + N->getOperator()->getName() +
"' glue output node",
NextRecordedOperandNo));
MatchedGlueResultNodes.push_back(NextRecordedOperandNo++);
}
if (N->NodeHasProperty(SDNPOptInGlue, CGP) ||
N->NodeHasProperty(SDNPInGlue, CGP))
AddMatcher(new CaptureGlueInputMatcher());
for (unsigned i = 0, e = N->getNumChildren(); i != e; ++i, ++OpNo) {
AddMatcher(new MoveChildMatcher(OpNo));
EmitMatchCode(N->getChild(i), NodeNoTypes->getChild(i));
AddMatcher(new MoveParentMatcher());
}
}
void MatcherGen::EmitMatchCode(const TreePatternNode *N,
TreePatternNode *NodeNoTypes) {
SmallVector<unsigned, 2> ResultsToTypeCheck;
for (unsigned i = 0, e = NodeNoTypes->getNumTypes(); i != e; ++i) {
if (NodeNoTypes->getExtType(i) == N->getExtType(i)) continue;
NodeNoTypes->setType(i, N->getExtType(i));
InferPossibleTypes();
ResultsToTypeCheck.push_back(i);
}
if (!N->getName().empty()) {
unsigned &VarMapEntry = VariableMap[N->getName()];
if (VarMapEntry == 0) {
AddMatcher(new RecordMatcher("$" + N->getName(), NextRecordedOperandNo));
VarMapEntry = ++NextRecordedOperandNo;
} else {
AddMatcher(new CheckSameMatcher(VarMapEntry-1));
return;
}
}
if (N->isLeaf())
EmitLeafMatchCode(N);
else
EmitOperatorMatchCode(N, NodeNoTypes);
for (unsigned i = 0, e = N->getPredicateFns().size(); i != e; ++i)
AddMatcher(new CheckPredicateMatcher(N->getPredicateFns()[i]));
for (unsigned i = 0, e = ResultsToTypeCheck.size(); i != e; ++i)
AddMatcher(new CheckTypeMatcher(N->getType(ResultsToTypeCheck[i]),
ResultsToTypeCheck[i]));
}
bool MatcherGen::EmitMatcherCode(unsigned Variant) {
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;
}
EmitMatchCode(Pattern.getSrcPattern(), PatWithNoTypes);
if (!Pattern.getPredicateCheck().empty())
AddMatcher(new CheckPatternPredicateMatcher(Pattern.getPredicateCheck()));
for (unsigned i = 0, e = MatchedComplexPatterns.size(); i != e; ++i) {
const TreePatternNode *N = MatchedComplexPatterns[i].first;
MatchedComplexPatterns[i].second = NextRecordedOperandNo;
unsigned RecNodeEntry = VariableMap[N->getName()];
assert(!N->getName().empty() && RecNodeEntry &&
"Complex pattern should have a name and slot");
--RecNodeEntry;
const ComplexPattern &CP =
CGP.getComplexPattern(((DefInit*)N->getLeafValue())->getDef());
AddMatcher(new CheckComplexPatMatcher(CP, RecNodeEntry,
N->getName(), NextRecordedOperandNo));
NextRecordedOperandNo += CP.getNumOperands();
if (CP.hasProperty(SDNPHasChain)) {
++NextRecordedOperandNo;
assert(NextRecordedOperandNo > 1 &&
"Should have recorded input/result chains at least!");
MatchedChainNodes.push_back(NextRecordedOperandNo-1);
}
}
return false;
}
void MatcherGen::EmitResultOfNamedOperand(const TreePatternNode *N,
SmallVectorImpl<unsigned> &ResultOps){
assert(!N->getName().empty() && "Operand not named!");
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?");
for (unsigned i = 0, e = CP->getNumOperands(); i != e; ++i)
ResultOps.push_back(SlotNo+i);
return;
}
unsigned SlotNo = getNamedArgumentSlot(N->getName());
if (!N->isLeaf()) {
StringRef OperatorName = N->getOperator()->getName();
if (OperatorName == "imm" || OperatorName == "fpimm") {
AddMatcher(new EmitConvertToTargetMatcher(SlotNo));
ResultOps.push_back(NextRecordedOperandNo++);
return;
}
}
ResultOps.push_back(SlotNo);
}
void MatcherGen::EmitResultLeafAsOperand(const TreePatternNode *N,
SmallVectorImpl<unsigned> &ResultOps) {
assert(N->isLeaf() && "Must be a leaf");
if (IntInit *II = dyn_cast<IntInit>(N->getLeafValue())) {
AddMatcher(new EmitIntegerMatcher(II->getValue(), N->getType(0)));
ResultOps.push_back(NextRecordedOperandNo++);
return;
}
if (DefInit *DI = dyn_cast<DefInit>(N->getLeafValue())) {
Record *Def = DI->getDef();
if (Def->isSubClassOf("Register")) {
const CodeGenRegister *Reg =
CGP.getTargetInfo().getRegBank().getReg(Def);
AddMatcher(new EmitRegisterMatcher(Reg, N->getType(0)));
ResultOps.push_back(NextRecordedOperandNo++);
return;
}
if (Def->getName() == "zero_reg") {
AddMatcher(new EmitRegisterMatcher(0, N->getType(0)));
ResultOps.push_back(NextRecordedOperandNo++);
return;
}
if (Def->isSubClassOf("RegisterOperand"))
Def = Def->getValueAsDef("RegClass");
if (Def->isSubClassOf("RegisterClass")) {
std::string Value = getQualifiedName(Def) + "RegClassID";
AddMatcher(new EmitStringIntegerMatcher(Value, MVT::i32));
ResultOps.push_back(NextRecordedOperandNo++);
return;
}
if (Def->isSubClassOf("SubRegIndex")) {
std::string Value = getQualifiedName(Def);
AddMatcher(new EmitStringIntegerMatcher(Value, MVT::i32));
ResultOps.push_back(NextRecordedOperandNo++);
return;
}
}
errs() << "unhandled leaf node: \n";
N->dump();
}
const TreePatternNode *MatcherGen::
GetInstPatternNode(const DAGInstruction &Inst, const TreePatternNode *N) {
const TreePattern *InstPat = Inst.getPattern();
TreePatternNode *InstPatNode;
if (InstPat)
InstPatNode = InstPat->getTree(0);
else if ( N == Pattern.getDstPattern())
InstPatNode = Pattern.getSrcPattern();
else
return 0;
if (InstPatNode && !InstPatNode->isLeaf() &&
InstPatNode->getOperator()->getName() == "set")
InstPatNode = InstPatNode->getChild(InstPatNode->getNumChildren()-1);
return InstPatNode;
}
static bool
mayInstNodeLoadOrStore(const TreePatternNode *N,
const CodeGenDAGPatterns &CGP) {
Record *Op = N->getOperator();
const CodeGenTarget &CGT = CGP.getTargetInfo();
CodeGenInstruction &II = CGT.getInstruction(Op);
return II.mayLoad || II.mayStore;
}
static unsigned
numNodesThatMayLoadOrStore(const TreePatternNode *N,
const CodeGenDAGPatterns &CGP) {
if (N->isLeaf())
return 0;
Record *OpRec = N->getOperator();
if (!OpRec->isSubClassOf("Instruction"))
return 0;
unsigned Count = 0;
if (mayInstNodeLoadOrStore(N, CGP))
++Count;
for (unsigned i = 0, e = N->getNumChildren(); i != e; ++i)
Count += numNodesThatMayLoadOrStore(N->getChild(i), CGP);
return Count;
}
void MatcherGen::
EmitResultInstructionAsOperand(const TreePatternNode *N,
SmallVectorImpl<unsigned> &OutputOps) {
Record *Op = N->getOperator();
const CodeGenTarget &CGT = CGP.getTargetInfo();
CodeGenInstruction &II = CGT.getInstruction(Op);
const DAGInstruction &Inst = CGP.getInstruction(Op);
const TreePatternNode *InstPatNode = GetInstPatternNode(Inst, N);
bool NodeHasChain = InstPatNode &&
InstPatNode->TreeHasProperty(SDNPHasChain, CGP);
if (Pattern.getSrcPattern()->TreeHasProperty(SDNPHasChain, CGP)
&& (II.hasCtrlDep || II.mayLoad || II.mayStore || II.canFoldAsLoad ||
II.hasSideEffects))
NodeHasChain = true;
bool isRoot = N == Pattern.getDstPattern();
bool TreeHasInGlue = false, TreeHasOutGlue = false;
if (isRoot) {
const TreePatternNode *SrcPat = Pattern.getSrcPattern();
TreeHasInGlue = SrcPat->TreeHasProperty(SDNPOptInGlue, CGP) ||
SrcPat->TreeHasProperty(SDNPInGlue, CGP);
TreeHasOutGlue = SrcPat->TreeHasProperty(SDNPOutGlue, CGP);
}
unsigned NumResults = Inst.getNumResults();
SmallVector<unsigned, 8> InstOps;
for (unsigned ChildNo = 0, InstOpNo = NumResults, e = II.Operands.size();
InstOpNo != e; ++InstOpNo) {
Record *OperandNode = II.Operands[InstOpNo].Rec;
if (OperandNode->isSubClassOf("OperandWithDefaultOps") &&
!CGP.getDefaultOperand(OperandNode).DefaultOps.empty()) {
const DAGDefaultOperand &DefaultOp
= CGP.getDefaultOperand(OperandNode);
for (unsigned i = 0, e = DefaultOp.DefaultOps.size(); i != e; ++i)
EmitResultOperand(DefaultOp.DefaultOps[i], InstOps);
continue;
}
unsigned NumSubOps = 1;
if (OperandNode->isSubClassOf("Operand")) {
DagInit *MIOpInfo = OperandNode->getValueAsDag("MIOperandInfo");
if (unsigned NumArgs = MIOpInfo->getNumArgs())
NumSubOps = NumArgs;
}
unsigned FinalNumOps = InstOps.size() + NumSubOps;
while (InstOps.size() < FinalNumOps) {
const TreePatternNode *Child = N->getChild(ChildNo);
unsigned BeforeAddingNumOps = InstOps.size();
EmitResultOperand(Child, InstOps);
assert(InstOps.size() > BeforeAddingNumOps && "Didn't add any operands");
if (!Child->isLeaf() && Child->getOperator()->isSubClassOf("Instruction"))
InstOps.resize(BeforeAddingNumOps+1);
++ChildNo;
}
}
if (isRoot && !PhysRegInputs.empty()) {
for (unsigned i = 0, e = PhysRegInputs.size(); i != e; ++i)
AddMatcher(new EmitCopyToRegMatcher(PhysRegInputs[i].second,
PhysRegInputs[i].first));
TreeHasInGlue = true;
}
SmallVector<MVT::SimpleValueType, 4> ResultVTs;
for (unsigned i = 0, e = N->getNumTypes(); i != e; ++i)
ResultVTs.push_back(N->getType(i));
if (isRoot && !Pattern.getDstRegs().empty()) {
Record *HandledReg = 0;
if (II.HasOneImplicitDefWithKnownVT(CGT) != MVT::Other)
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));
}
}
int NumFixedArityOperands = -1;
if (isRoot &&
(Pattern.getSrcPattern()->NodeHasProperty(SDNPVariadic, CGP)))
NumFixedArityOperands = Pattern.getSrcPattern()->getNumChildren();
bool PatternHasMemOperands =
Pattern.getSrcPattern()->TreeHasProperty(SDNPMemOperand, CGP);
bool NodeHasMemRefs = false;
if (PatternHasMemOperands) {
unsigned NumNodesThatLoadOrStore =
numNodesThatMayLoadOrStore(Pattern.getDstPattern(), CGP);
bool NodeIsUniqueLoadOrStore = mayInstNodeLoadOrStore(N, CGP) &&
NumNodesThatLoadOrStore == 1;
NodeHasMemRefs =
NodeIsUniqueLoadOrStore || (isRoot && (mayInstNodeLoadOrStore(N, CGP) ||
NumNodesThatLoadOrStore != 1));
}
assert((!ResultVTs.empty() || TreeHasOutGlue || NodeHasChain) &&
"Node has no result");
AddMatcher(new EmitNodeMatcher(II.Namespace+"::"+II.TheDef->getName(),
ResultVTs, InstOps,
NodeHasChain, TreeHasInGlue, TreeHasOutGlue,
NodeHasMemRefs, NumFixedArityOperands,
NextRecordedOperandNo));
for (unsigned i = 0, e = ResultVTs.size(); i != e; ++i) {
if (ResultVTs[i] == MVT::Other || ResultVTs[i] == MVT::Glue) break;
OutputOps.push_back(NextRecordedOperandNo++);
}
}
void MatcherGen::
EmitResultSDNodeXFormAsOperand(const TreePatternNode *N,
SmallVectorImpl<unsigned> &ResultOps) {
assert(N->getOperator()->isSubClassOf("SDNodeXForm") && "Not SDNodeXForm?");
SmallVector<unsigned, 8> InputOps;
assert(N->getNumChildren() == 1);
EmitResultOperand(N->getChild(0), InputOps);
assert(InputOps.size() == 1 && "Unexpected input to SDNodeXForm");
AddMatcher(new EmitNodeXFormMatcher(InputOps[0], N->getOperator()));
ResultOps.push_back(NextRecordedOperandNo++);
}
void MatcherGen::EmitResultOperand(const TreePatternNode *N,
SmallVectorImpl<unsigned> &ResultOps) {
if (!N->getName().empty())
return EmitResultOfNamedOperand(N, ResultOps);
if (N->isLeaf())
return EmitResultLeafAsOperand(N, ResultOps);
Record *OpRec = N->getOperator();
if (OpRec->isSubClassOf("Instruction"))
return EmitResultInstructionAsOperand(N, ResultOps);
if (OpRec->isSubClassOf("SDNodeXForm"))
return EmitResultSDNodeXFormAsOperand(N, ResultOps);
errs() << "Unknown result node to emit code for: " << *N << '\n';
PrintFatalError("Unknown node in result pattern!");
}
void MatcherGen::EmitResultCode() {
if (!MatchedChainNodes.empty())
AddMatcher(new EmitMergeInputChainsMatcher(MatchedChainNodes));
SmallVector<unsigned, 8> Ops;
EmitResultOperand(Pattern.getDstPattern(), Ops);
unsigned NumSrcResults = Pattern.getSrcPattern()->getNumTypes();
if (!Pattern.getDstRegs().empty()) {
Record *HandledReg = 0;
const TreePatternNode *DstPat = Pattern.getDstPattern();
if (!DstPat->isLeaf() &&DstPat->getOperator()->isSubClassOf("Instruction")){
const CodeGenTarget &CGT = CGP.getTargetInfo();
CodeGenInstruction &II = CGT.getInstruction(DstPat->getOperator());
if (II.HasOneImplicitDefWithKnownVT(CGT) != MVT::Other)
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;
++NumSrcResults;
}
}
assert(Ops.size() >= NumSrcResults && "Didn't provide enough results");
Ops.resize(NumSrcResults);
if (!MatchedGlueResultNodes.empty())
AddMatcher(new MarkGlueResultsMatcher(MatchedGlueResultNodes));
AddMatcher(new CompleteMatchMatcher(Ops, Pattern));
}
Matcher *llvm::ConvertPatternToMatcher(const PatternToMatch &Pattern,
unsigned Variant,
const CodeGenDAGPatterns &CGP) {
MatcherGen Gen(Pattern, CGP);
if (Gen.EmitMatcherCode(Variant))
return 0;
Gen.EmitResultCode();
return Gen.GetMatcher();
}