832 lines
28 KiB
C++
832 lines
28 KiB
C++
//===- DAGISelMatcherEmitter.cpp - Matcher Emitter ------------------------===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This file contains code to generate C++ code for a matcher.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "DAGISelMatcher.h"
|
|
#include "CodeGenDAGPatterns.h"
|
|
#include "llvm/ADT/DenseMap.h"
|
|
#include "llvm/ADT/SmallString.h"
|
|
#include "llvm/ADT/StringMap.h"
|
|
#include "llvm/Support/CommandLine.h"
|
|
#include "llvm/Support/FormattedStream.h"
|
|
#include "llvm/TableGen/Record.h"
|
|
using namespace llvm;
|
|
|
|
enum {
|
|
CommentIndent = 30
|
|
};
|
|
|
|
// To reduce generated source code size.
|
|
static cl::opt<bool>
|
|
OmitComments("omit-comments", cl::desc("Do not generate comments"),
|
|
cl::init(false));
|
|
|
|
namespace {
|
|
class MatcherTableEmitter {
|
|
const CodeGenDAGPatterns &CGP;
|
|
|
|
DenseMap<TreePattern *, unsigned> NodePredicateMap;
|
|
std::vector<TreePredicateFn> NodePredicates;
|
|
|
|
StringMap<unsigned> PatternPredicateMap;
|
|
std::vector<std::string> PatternPredicates;
|
|
|
|
DenseMap<const ComplexPattern*, unsigned> ComplexPatternMap;
|
|
std::vector<const ComplexPattern*> ComplexPatterns;
|
|
|
|
|
|
DenseMap<Record*, unsigned> NodeXFormMap;
|
|
std::vector<Record*> NodeXForms;
|
|
|
|
public:
|
|
MatcherTableEmitter(const CodeGenDAGPatterns &cgp)
|
|
: CGP(cgp) {}
|
|
|
|
unsigned EmitMatcherList(const Matcher *N, unsigned Indent,
|
|
unsigned StartIdx, formatted_raw_ostream &OS);
|
|
|
|
void EmitPredicateFunctions(formatted_raw_ostream &OS);
|
|
|
|
void EmitHistogram(const Matcher *N, formatted_raw_ostream &OS);
|
|
private:
|
|
unsigned EmitMatcher(const Matcher *N, unsigned Indent, unsigned CurrentIdx,
|
|
formatted_raw_ostream &OS);
|
|
|
|
unsigned getNodePredicate(TreePredicateFn Pred) {
|
|
unsigned &Entry = NodePredicateMap[Pred.getOrigPatFragRecord()];
|
|
if (Entry == 0) {
|
|
NodePredicates.push_back(Pred);
|
|
Entry = NodePredicates.size();
|
|
}
|
|
return Entry-1;
|
|
}
|
|
|
|
unsigned getPatternPredicate(StringRef PredName) {
|
|
unsigned &Entry = PatternPredicateMap[PredName];
|
|
if (Entry == 0) {
|
|
PatternPredicates.push_back(PredName.str());
|
|
Entry = PatternPredicates.size();
|
|
}
|
|
return Entry-1;
|
|
}
|
|
unsigned getComplexPat(const ComplexPattern &P) {
|
|
unsigned &Entry = ComplexPatternMap[&P];
|
|
if (Entry == 0) {
|
|
ComplexPatterns.push_back(&P);
|
|
Entry = ComplexPatterns.size();
|
|
}
|
|
return Entry-1;
|
|
}
|
|
|
|
unsigned getNodeXFormID(Record *Rec) {
|
|
unsigned &Entry = NodeXFormMap[Rec];
|
|
if (Entry == 0) {
|
|
NodeXForms.push_back(Rec);
|
|
Entry = NodeXForms.size();
|
|
}
|
|
return Entry-1;
|
|
}
|
|
|
|
};
|
|
} // end anonymous namespace.
|
|
|
|
static unsigned GetVBRSize(unsigned Val) {
|
|
if (Val <= 127) return 1;
|
|
|
|
unsigned NumBytes = 0;
|
|
while (Val >= 128) {
|
|
Val >>= 7;
|
|
++NumBytes;
|
|
}
|
|
return NumBytes+1;
|
|
}
|
|
|
|
/// EmitVBRValue - Emit the specified value as a VBR, returning the number of
|
|
/// bytes emitted.
|
|
static uint64_t EmitVBRValue(uint64_t Val, raw_ostream &OS) {
|
|
if (Val <= 127) {
|
|
OS << Val << ", ";
|
|
return 1;
|
|
}
|
|
|
|
uint64_t InVal = Val;
|
|
unsigned NumBytes = 0;
|
|
while (Val >= 128) {
|
|
OS << (Val&127) << "|128,";
|
|
Val >>= 7;
|
|
++NumBytes;
|
|
}
|
|
OS << Val;
|
|
if (!OmitComments)
|
|
OS << "/*" << InVal << "*/";
|
|
OS << ", ";
|
|
return NumBytes+1;
|
|
}
|
|
|
|
/// EmitMatcher - Emit bytes for the specified matcher and return
|
|
/// the number of bytes emitted.
|
|
unsigned MatcherTableEmitter::
|
|
EmitMatcher(const Matcher *N, unsigned Indent, unsigned CurrentIdx,
|
|
formatted_raw_ostream &OS) {
|
|
OS.PadToColumn(Indent*2);
|
|
|
|
switch (N->getKind()) {
|
|
case Matcher::Scope: {
|
|
const ScopeMatcher *SM = cast<ScopeMatcher>(N);
|
|
assert(SM->getNext() == nullptr && "Shouldn't have next after scope");
|
|
|
|
unsigned StartIdx = CurrentIdx;
|
|
|
|
// Emit all of the children.
|
|
for (unsigned i = 0, e = SM->getNumChildren(); i != e; ++i) {
|
|
if (i == 0) {
|
|
OS << "OPC_Scope, ";
|
|
++CurrentIdx;
|
|
} else {
|
|
if (!OmitComments) {
|
|
OS << "/*" << CurrentIdx << "*/";
|
|
OS.PadToColumn(Indent*2) << "/*Scope*/ ";
|
|
} else
|
|
OS.PadToColumn(Indent*2);
|
|
}
|
|
|
|
// We need to encode the child and the offset of the failure code before
|
|
// emitting either of them. Handle this by buffering the output into a
|
|
// string while we get the size. Unfortunately, the offset of the
|
|
// children depends on the VBR size of the child, so for large children we
|
|
// have to iterate a bit.
|
|
SmallString<128> TmpBuf;
|
|
unsigned ChildSize = 0;
|
|
unsigned VBRSize = 0;
|
|
do {
|
|
VBRSize = GetVBRSize(ChildSize);
|
|
|
|
TmpBuf.clear();
|
|
raw_svector_ostream OS(TmpBuf);
|
|
formatted_raw_ostream FOS(OS);
|
|
ChildSize = EmitMatcherList(SM->getChild(i), Indent+1,
|
|
CurrentIdx+VBRSize, FOS);
|
|
} while (GetVBRSize(ChildSize) != VBRSize);
|
|
|
|
assert(ChildSize != 0 && "Should not have a zero-sized child!");
|
|
|
|
CurrentIdx += EmitVBRValue(ChildSize, OS);
|
|
if (!OmitComments) {
|
|
OS << "/*->" << CurrentIdx+ChildSize << "*/";
|
|
|
|
if (i == 0)
|
|
OS.PadToColumn(CommentIndent) << "// " << SM->getNumChildren()
|
|
<< " children in Scope";
|
|
}
|
|
|
|
OS << '\n' << TmpBuf.str();
|
|
CurrentIdx += ChildSize;
|
|
}
|
|
|
|
// Emit a zero as a sentinel indicating end of 'Scope'.
|
|
if (!OmitComments)
|
|
OS << "/*" << CurrentIdx << "*/";
|
|
OS.PadToColumn(Indent*2) << "0, ";
|
|
if (!OmitComments)
|
|
OS << "/*End of Scope*/";
|
|
OS << '\n';
|
|
return CurrentIdx - StartIdx + 1;
|
|
}
|
|
|
|
case Matcher::RecordNode:
|
|
OS << "OPC_RecordNode,";
|
|
if (!OmitComments)
|
|
OS.PadToColumn(CommentIndent) << "// #"
|
|
<< cast<RecordMatcher>(N)->getResultNo() << " = "
|
|
<< cast<RecordMatcher>(N)->getWhatFor();
|
|
OS << '\n';
|
|
return 1;
|
|
|
|
case Matcher::RecordChild:
|
|
OS << "OPC_RecordChild" << cast<RecordChildMatcher>(N)->getChildNo()
|
|
<< ',';
|
|
if (!OmitComments)
|
|
OS.PadToColumn(CommentIndent) << "// #"
|
|
<< cast<RecordChildMatcher>(N)->getResultNo() << " = "
|
|
<< cast<RecordChildMatcher>(N)->getWhatFor();
|
|
OS << '\n';
|
|
return 1;
|
|
|
|
case Matcher::RecordMemRef:
|
|
OS << "OPC_RecordMemRef,\n";
|
|
return 1;
|
|
|
|
case Matcher::CaptureGlueInput:
|
|
OS << "OPC_CaptureGlueInput,\n";
|
|
return 1;
|
|
|
|
case Matcher::MoveChild:
|
|
OS << "OPC_MoveChild, " << cast<MoveChildMatcher>(N)->getChildNo() << ",\n";
|
|
return 2;
|
|
|
|
case Matcher::MoveParent:
|
|
OS << "OPC_MoveParent,\n";
|
|
return 1;
|
|
|
|
case Matcher::CheckSame:
|
|
OS << "OPC_CheckSame, "
|
|
<< cast<CheckSameMatcher>(N)->getMatchNumber() << ",\n";
|
|
return 2;
|
|
|
|
case Matcher::CheckChildSame:
|
|
OS << "OPC_CheckChild"
|
|
<< cast<CheckChildSameMatcher>(N)->getChildNo() << "Same, "
|
|
<< cast<CheckChildSameMatcher>(N)->getMatchNumber() << ",\n";
|
|
return 2;
|
|
|
|
case Matcher::CheckPatternPredicate: {
|
|
StringRef Pred =cast<CheckPatternPredicateMatcher>(N)->getPredicate();
|
|
OS << "OPC_CheckPatternPredicate, " << getPatternPredicate(Pred) << ',';
|
|
if (!OmitComments)
|
|
OS.PadToColumn(CommentIndent) << "// " << Pred;
|
|
OS << '\n';
|
|
return 2;
|
|
}
|
|
case Matcher::CheckPredicate: {
|
|
TreePredicateFn Pred = cast<CheckPredicateMatcher>(N)->getPredicate();
|
|
OS << "OPC_CheckPredicate, " << getNodePredicate(Pred) << ',';
|
|
if (!OmitComments)
|
|
OS.PadToColumn(CommentIndent) << "// " << Pred.getFnName();
|
|
OS << '\n';
|
|
return 2;
|
|
}
|
|
|
|
case Matcher::CheckOpcode:
|
|
OS << "OPC_CheckOpcode, TARGET_VAL("
|
|
<< cast<CheckOpcodeMatcher>(N)->getOpcode().getEnumName() << "),\n";
|
|
return 3;
|
|
|
|
case Matcher::SwitchOpcode:
|
|
case Matcher::SwitchType: {
|
|
unsigned StartIdx = CurrentIdx;
|
|
|
|
unsigned NumCases;
|
|
if (const SwitchOpcodeMatcher *SOM = dyn_cast<SwitchOpcodeMatcher>(N)) {
|
|
OS << "OPC_SwitchOpcode ";
|
|
NumCases = SOM->getNumCases();
|
|
} else {
|
|
OS << "OPC_SwitchType ";
|
|
NumCases = cast<SwitchTypeMatcher>(N)->getNumCases();
|
|
}
|
|
|
|
if (!OmitComments)
|
|
OS << "/*" << NumCases << " cases */";
|
|
OS << ", ";
|
|
++CurrentIdx;
|
|
|
|
// For each case we emit the size, then the opcode, then the matcher.
|
|
for (unsigned i = 0, e = NumCases; i != e; ++i) {
|
|
const Matcher *Child;
|
|
unsigned IdxSize;
|
|
if (const SwitchOpcodeMatcher *SOM = dyn_cast<SwitchOpcodeMatcher>(N)) {
|
|
Child = SOM->getCaseMatcher(i);
|
|
IdxSize = 2; // size of opcode in table is 2 bytes.
|
|
} else {
|
|
Child = cast<SwitchTypeMatcher>(N)->getCaseMatcher(i);
|
|
IdxSize = 1; // size of type in table is 1 byte.
|
|
}
|
|
|
|
// We need to encode the opcode and the offset of the case code before
|
|
// emitting the case code. Handle this by buffering the output into a
|
|
// string while we get the size. Unfortunately, the offset of the
|
|
// children depends on the VBR size of the child, so for large children we
|
|
// have to iterate a bit.
|
|
SmallString<128> TmpBuf;
|
|
unsigned ChildSize = 0;
|
|
unsigned VBRSize = 0;
|
|
do {
|
|
VBRSize = GetVBRSize(ChildSize);
|
|
|
|
TmpBuf.clear();
|
|
raw_svector_ostream OS(TmpBuf);
|
|
formatted_raw_ostream FOS(OS);
|
|
ChildSize = EmitMatcherList(Child, Indent+1, CurrentIdx+VBRSize+IdxSize,
|
|
FOS);
|
|
} while (GetVBRSize(ChildSize) != VBRSize);
|
|
|
|
assert(ChildSize != 0 && "Should not have a zero-sized child!");
|
|
|
|
if (i != 0) {
|
|
if (!OmitComments)
|
|
OS << "/*" << CurrentIdx << "*/";
|
|
OS.PadToColumn(Indent*2);
|
|
if (!OmitComments)
|
|
OS << (isa<SwitchOpcodeMatcher>(N) ?
|
|
"/*SwitchOpcode*/ " : "/*SwitchType*/ ");
|
|
}
|
|
|
|
// Emit the VBR.
|
|
CurrentIdx += EmitVBRValue(ChildSize, OS);
|
|
|
|
if (const SwitchOpcodeMatcher *SOM = dyn_cast<SwitchOpcodeMatcher>(N))
|
|
OS << "TARGET_VAL(" << SOM->getCaseOpcode(i).getEnumName() << "),";
|
|
else
|
|
OS << getEnumName(cast<SwitchTypeMatcher>(N)->getCaseType(i)) << ',';
|
|
|
|
CurrentIdx += IdxSize;
|
|
|
|
if (!OmitComments)
|
|
OS << "// ->" << CurrentIdx+ChildSize;
|
|
OS << '\n';
|
|
OS << TmpBuf.str();
|
|
CurrentIdx += ChildSize;
|
|
}
|
|
|
|
// Emit the final zero to terminate the switch.
|
|
if (!OmitComments)
|
|
OS << "/*" << CurrentIdx << "*/";
|
|
OS.PadToColumn(Indent*2) << "0, ";
|
|
if (!OmitComments)
|
|
OS << (isa<SwitchOpcodeMatcher>(N) ?
|
|
"// EndSwitchOpcode" : "// EndSwitchType");
|
|
|
|
OS << '\n';
|
|
++CurrentIdx;
|
|
return CurrentIdx-StartIdx;
|
|
}
|
|
|
|
case Matcher::CheckType:
|
|
assert(cast<CheckTypeMatcher>(N)->getResNo() == 0 &&
|
|
"FIXME: Add support for CheckType of resno != 0");
|
|
OS << "OPC_CheckType, "
|
|
<< getEnumName(cast<CheckTypeMatcher>(N)->getType()) << ",\n";
|
|
return 2;
|
|
|
|
case Matcher::CheckChildType:
|
|
OS << "OPC_CheckChild"
|
|
<< cast<CheckChildTypeMatcher>(N)->getChildNo() << "Type, "
|
|
<< getEnumName(cast<CheckChildTypeMatcher>(N)->getType()) << ",\n";
|
|
return 2;
|
|
|
|
case Matcher::CheckInteger: {
|
|
OS << "OPC_CheckInteger, ";
|
|
unsigned Bytes=1+EmitVBRValue(cast<CheckIntegerMatcher>(N)->getValue(), OS);
|
|
OS << '\n';
|
|
return Bytes;
|
|
}
|
|
case Matcher::CheckChildInteger: {
|
|
OS << "OPC_CheckChild" << cast<CheckChildIntegerMatcher>(N)->getChildNo()
|
|
<< "Integer, ";
|
|
unsigned Bytes=1+EmitVBRValue(cast<CheckChildIntegerMatcher>(N)->getValue(),
|
|
OS);
|
|
OS << '\n';
|
|
return Bytes;
|
|
}
|
|
case Matcher::CheckCondCode:
|
|
OS << "OPC_CheckCondCode, ISD::"
|
|
<< cast<CheckCondCodeMatcher>(N)->getCondCodeName() << ",\n";
|
|
return 2;
|
|
|
|
case Matcher::CheckValueType:
|
|
OS << "OPC_CheckValueType, MVT::"
|
|
<< cast<CheckValueTypeMatcher>(N)->getTypeName() << ",\n";
|
|
return 2;
|
|
|
|
case Matcher::CheckComplexPat: {
|
|
const CheckComplexPatMatcher *CCPM = cast<CheckComplexPatMatcher>(N);
|
|
const ComplexPattern &Pattern = CCPM->getPattern();
|
|
OS << "OPC_CheckComplexPat, /*CP*/" << getComplexPat(Pattern) << ", /*#*/"
|
|
<< CCPM->getMatchNumber() << ',';
|
|
|
|
if (!OmitComments) {
|
|
OS.PadToColumn(CommentIndent) << "// " << Pattern.getSelectFunc();
|
|
OS << ":$" << CCPM->getName();
|
|
for (unsigned i = 0, e = Pattern.getNumOperands(); i != e; ++i)
|
|
OS << " #" << CCPM->getFirstResult()+i;
|
|
|
|
if (Pattern.hasProperty(SDNPHasChain))
|
|
OS << " + chain result";
|
|
}
|
|
OS << '\n';
|
|
return 3;
|
|
}
|
|
|
|
case Matcher::CheckAndImm: {
|
|
OS << "OPC_CheckAndImm, ";
|
|
unsigned Bytes=1+EmitVBRValue(cast<CheckAndImmMatcher>(N)->getValue(), OS);
|
|
OS << '\n';
|
|
return Bytes;
|
|
}
|
|
|
|
case Matcher::CheckOrImm: {
|
|
OS << "OPC_CheckOrImm, ";
|
|
unsigned Bytes = 1+EmitVBRValue(cast<CheckOrImmMatcher>(N)->getValue(), OS);
|
|
OS << '\n';
|
|
return Bytes;
|
|
}
|
|
|
|
case Matcher::CheckFoldableChainNode:
|
|
OS << "OPC_CheckFoldableChainNode,\n";
|
|
return 1;
|
|
|
|
case Matcher::EmitInteger: {
|
|
int64_t Val = cast<EmitIntegerMatcher>(N)->getValue();
|
|
OS << "OPC_EmitInteger, "
|
|
<< getEnumName(cast<EmitIntegerMatcher>(N)->getVT()) << ", ";
|
|
unsigned Bytes = 2+EmitVBRValue(Val, OS);
|
|
OS << '\n';
|
|
return Bytes;
|
|
}
|
|
case Matcher::EmitStringInteger: {
|
|
const std::string &Val = cast<EmitStringIntegerMatcher>(N)->getValue();
|
|
// These should always fit into one byte.
|
|
OS << "OPC_EmitInteger, "
|
|
<< getEnumName(cast<EmitStringIntegerMatcher>(N)->getVT()) << ", "
|
|
<< Val << ",\n";
|
|
return 3;
|
|
}
|
|
|
|
case Matcher::EmitRegister: {
|
|
const EmitRegisterMatcher *Matcher = cast<EmitRegisterMatcher>(N);
|
|
const CodeGenRegister *Reg = Matcher->getReg();
|
|
// If the enum value of the register is larger than one byte can handle,
|
|
// use EmitRegister2.
|
|
if (Reg && Reg->EnumValue > 255) {
|
|
OS << "OPC_EmitRegister2, " << getEnumName(Matcher->getVT()) << ", ";
|
|
OS << "TARGET_VAL(" << getQualifiedName(Reg->TheDef) << "),\n";
|
|
return 4;
|
|
} else {
|
|
OS << "OPC_EmitRegister, " << getEnumName(Matcher->getVT()) << ", ";
|
|
if (Reg) {
|
|
OS << getQualifiedName(Reg->TheDef) << ",\n";
|
|
} else {
|
|
OS << "0 ";
|
|
if (!OmitComments)
|
|
OS << "/*zero_reg*/";
|
|
OS << ",\n";
|
|
}
|
|
return 3;
|
|
}
|
|
}
|
|
|
|
case Matcher::EmitConvertToTarget:
|
|
OS << "OPC_EmitConvertToTarget, "
|
|
<< cast<EmitConvertToTargetMatcher>(N)->getSlot() << ",\n";
|
|
return 2;
|
|
|
|
case Matcher::EmitMergeInputChains: {
|
|
const EmitMergeInputChainsMatcher *MN =
|
|
cast<EmitMergeInputChainsMatcher>(N);
|
|
|
|
// Handle the specialized forms OPC_EmitMergeInputChains1_0 and 1_1.
|
|
if (MN->getNumNodes() == 1 && MN->getNode(0) < 2) {
|
|
OS << "OPC_EmitMergeInputChains1_" << MN->getNode(0) << ",\n";
|
|
return 1;
|
|
}
|
|
|
|
OS << "OPC_EmitMergeInputChains, " << MN->getNumNodes() << ", ";
|
|
for (unsigned i = 0, e = MN->getNumNodes(); i != e; ++i)
|
|
OS << MN->getNode(i) << ", ";
|
|
OS << '\n';
|
|
return 2+MN->getNumNodes();
|
|
}
|
|
case Matcher::EmitCopyToReg:
|
|
OS << "OPC_EmitCopyToReg, "
|
|
<< cast<EmitCopyToRegMatcher>(N)->getSrcSlot() << ", "
|
|
<< getQualifiedName(cast<EmitCopyToRegMatcher>(N)->getDestPhysReg())
|
|
<< ",\n";
|
|
return 3;
|
|
case Matcher::EmitNodeXForm: {
|
|
const EmitNodeXFormMatcher *XF = cast<EmitNodeXFormMatcher>(N);
|
|
OS << "OPC_EmitNodeXForm, " << getNodeXFormID(XF->getNodeXForm()) << ", "
|
|
<< XF->getSlot() << ',';
|
|
if (!OmitComments)
|
|
OS.PadToColumn(CommentIndent) << "// "<<XF->getNodeXForm()->getName();
|
|
OS <<'\n';
|
|
return 3;
|
|
}
|
|
|
|
case Matcher::EmitNode:
|
|
case Matcher::MorphNodeTo: {
|
|
const EmitNodeMatcherCommon *EN = cast<EmitNodeMatcherCommon>(N);
|
|
OS << (isa<EmitNodeMatcher>(EN) ? "OPC_EmitNode" : "OPC_MorphNodeTo");
|
|
OS << ", TARGET_VAL(" << EN->getOpcodeName() << "), 0";
|
|
|
|
if (EN->hasChain()) OS << "|OPFL_Chain";
|
|
if (EN->hasInFlag()) OS << "|OPFL_GlueInput";
|
|
if (EN->hasOutFlag()) OS << "|OPFL_GlueOutput";
|
|
if (EN->hasMemRefs()) OS << "|OPFL_MemRefs";
|
|
if (EN->getNumFixedArityOperands() != -1)
|
|
OS << "|OPFL_Variadic" << EN->getNumFixedArityOperands();
|
|
OS << ",\n";
|
|
|
|
OS.PadToColumn(Indent*2+4) << EN->getNumVTs();
|
|
if (!OmitComments)
|
|
OS << "/*#VTs*/";
|
|
OS << ", ";
|
|
for (unsigned i = 0, e = EN->getNumVTs(); i != e; ++i)
|
|
OS << getEnumName(EN->getVT(i)) << ", ";
|
|
|
|
OS << EN->getNumOperands();
|
|
if (!OmitComments)
|
|
OS << "/*#Ops*/";
|
|
OS << ", ";
|
|
unsigned NumOperandBytes = 0;
|
|
for (unsigned i = 0, e = EN->getNumOperands(); i != e; ++i)
|
|
NumOperandBytes += EmitVBRValue(EN->getOperand(i), OS);
|
|
|
|
if (!OmitComments) {
|
|
// Print the result #'s for EmitNode.
|
|
if (const EmitNodeMatcher *E = dyn_cast<EmitNodeMatcher>(EN)) {
|
|
if (unsigned NumResults = EN->getNumVTs()) {
|
|
OS.PadToColumn(CommentIndent) << "// Results =";
|
|
unsigned First = E->getFirstResultSlot();
|
|
for (unsigned i = 0; i != NumResults; ++i)
|
|
OS << " #" << First+i;
|
|
}
|
|
}
|
|
OS << '\n';
|
|
|
|
if (const MorphNodeToMatcher *SNT = dyn_cast<MorphNodeToMatcher>(N)) {
|
|
OS.PadToColumn(Indent*2) << "// Src: "
|
|
<< *SNT->getPattern().getSrcPattern() << " - Complexity = "
|
|
<< SNT->getPattern().getPatternComplexity(CGP) << '\n';
|
|
OS.PadToColumn(Indent*2) << "// Dst: "
|
|
<< *SNT->getPattern().getDstPattern() << '\n';
|
|
}
|
|
} else
|
|
OS << '\n';
|
|
|
|
return 6+EN->getNumVTs()+NumOperandBytes;
|
|
}
|
|
case Matcher::MarkGlueResults: {
|
|
const MarkGlueResultsMatcher *CFR = cast<MarkGlueResultsMatcher>(N);
|
|
OS << "OPC_MarkGlueResults, " << CFR->getNumNodes() << ", ";
|
|
unsigned NumOperandBytes = 0;
|
|
for (unsigned i = 0, e = CFR->getNumNodes(); i != e; ++i)
|
|
NumOperandBytes += EmitVBRValue(CFR->getNode(i), OS);
|
|
OS << '\n';
|
|
return 2+NumOperandBytes;
|
|
}
|
|
case Matcher::CompleteMatch: {
|
|
const CompleteMatchMatcher *CM = cast<CompleteMatchMatcher>(N);
|
|
OS << "OPC_CompleteMatch, " << CM->getNumResults() << ", ";
|
|
unsigned NumResultBytes = 0;
|
|
for (unsigned i = 0, e = CM->getNumResults(); i != e; ++i)
|
|
NumResultBytes += EmitVBRValue(CM->getResult(i), OS);
|
|
OS << '\n';
|
|
if (!OmitComments) {
|
|
OS.PadToColumn(Indent*2) << "// Src: "
|
|
<< *CM->getPattern().getSrcPattern() << " - Complexity = "
|
|
<< CM->getPattern().getPatternComplexity(CGP) << '\n';
|
|
OS.PadToColumn(Indent*2) << "// Dst: "
|
|
<< *CM->getPattern().getDstPattern();
|
|
}
|
|
OS << '\n';
|
|
return 2 + NumResultBytes;
|
|
}
|
|
}
|
|
llvm_unreachable("Unreachable");
|
|
}
|
|
|
|
/// EmitMatcherList - Emit the bytes for the specified matcher subtree.
|
|
unsigned MatcherTableEmitter::
|
|
EmitMatcherList(const Matcher *N, unsigned Indent, unsigned CurrentIdx,
|
|
formatted_raw_ostream &OS) {
|
|
unsigned Size = 0;
|
|
while (N) {
|
|
if (!OmitComments)
|
|
OS << "/*" << CurrentIdx << "*/";
|
|
unsigned MatcherSize = EmitMatcher(N, Indent, CurrentIdx, OS);
|
|
Size += MatcherSize;
|
|
CurrentIdx += MatcherSize;
|
|
|
|
// If there are other nodes in this list, iterate to them, otherwise we're
|
|
// done.
|
|
N = N->getNext();
|
|
}
|
|
return Size;
|
|
}
|
|
|
|
void MatcherTableEmitter::EmitPredicateFunctions(formatted_raw_ostream &OS) {
|
|
// Emit pattern predicates.
|
|
if (!PatternPredicates.empty()) {
|
|
OS << "bool CheckPatternPredicate(unsigned PredNo) const override {\n";
|
|
OS << " switch (PredNo) {\n";
|
|
OS << " default: llvm_unreachable(\"Invalid predicate in table?\");\n";
|
|
for (unsigned i = 0, e = PatternPredicates.size(); i != e; ++i)
|
|
OS << " case " << i << ": return " << PatternPredicates[i] << ";\n";
|
|
OS << " }\n";
|
|
OS << "}\n\n";
|
|
}
|
|
|
|
// Emit Node predicates.
|
|
// FIXME: Annoyingly, these are stored by name, which we never even emit. Yay?
|
|
StringMap<TreePattern*> PFsByName;
|
|
|
|
for (CodeGenDAGPatterns::pf_iterator I = CGP.pf_begin(), E = CGP.pf_end();
|
|
I != E; ++I)
|
|
PFsByName[I->first->getName()] = I->second;
|
|
|
|
if (!NodePredicates.empty()) {
|
|
OS << "bool CheckNodePredicate(SDNode *Node,\n";
|
|
OS << " unsigned PredNo) const override {\n";
|
|
OS << " switch (PredNo) {\n";
|
|
OS << " default: llvm_unreachable(\"Invalid predicate in table?\");\n";
|
|
for (unsigned i = 0, e = NodePredicates.size(); i != e; ++i) {
|
|
// Emit the predicate code corresponding to this pattern.
|
|
TreePredicateFn PredFn = NodePredicates[i];
|
|
|
|
assert(!PredFn.isAlwaysTrue() && "No code in this predicate");
|
|
OS << " case " << i << ": { // " << NodePredicates[i].getFnName() <<'\n';
|
|
|
|
OS << PredFn.getCodeToRunOnSDNode() << "\n }\n";
|
|
}
|
|
OS << " }\n";
|
|
OS << "}\n\n";
|
|
}
|
|
|
|
// Emit CompletePattern matchers.
|
|
// FIXME: This should be const.
|
|
if (!ComplexPatterns.empty()) {
|
|
OS << "bool CheckComplexPattern(SDNode *Root, SDNode *Parent,\n";
|
|
OS << " SDValue N, unsigned PatternNo,\n";
|
|
OS << " SmallVectorImpl<std::pair<SDValue, SDNode*> > &Result) override {\n";
|
|
OS << " unsigned NextRes = Result.size();\n";
|
|
OS << " switch (PatternNo) {\n";
|
|
OS << " default: llvm_unreachable(\"Invalid pattern # in table?\");\n";
|
|
for (unsigned i = 0, e = ComplexPatterns.size(); i != e; ++i) {
|
|
const ComplexPattern &P = *ComplexPatterns[i];
|
|
unsigned NumOps = P.getNumOperands();
|
|
|
|
if (P.hasProperty(SDNPHasChain))
|
|
++NumOps; // Get the chained node too.
|
|
|
|
OS << " case " << i << ":\n";
|
|
OS << " Result.resize(NextRes+" << NumOps << ");\n";
|
|
OS << " return " << P.getSelectFunc();
|
|
|
|
OS << "(";
|
|
// If the complex pattern wants the root of the match, pass it in as the
|
|
// first argument.
|
|
if (P.hasProperty(SDNPWantRoot))
|
|
OS << "Root, ";
|
|
|
|
// If the complex pattern wants the parent of the operand being matched,
|
|
// pass it in as the next argument.
|
|
if (P.hasProperty(SDNPWantParent))
|
|
OS << "Parent, ";
|
|
|
|
OS << "N";
|
|
for (unsigned i = 0; i != NumOps; ++i)
|
|
OS << ", Result[NextRes+" << i << "].first";
|
|
OS << ");\n";
|
|
}
|
|
OS << " }\n";
|
|
OS << "}\n\n";
|
|
}
|
|
|
|
|
|
// Emit SDNodeXForm handlers.
|
|
// FIXME: This should be const.
|
|
if (!NodeXForms.empty()) {
|
|
OS << "SDValue RunSDNodeXForm(SDValue V, unsigned XFormNo) override {\n";
|
|
OS << " switch (XFormNo) {\n";
|
|
OS << " default: llvm_unreachable(\"Invalid xform # in table?\");\n";
|
|
|
|
// FIXME: The node xform could take SDValue's instead of SDNode*'s.
|
|
for (unsigned i = 0, e = NodeXForms.size(); i != e; ++i) {
|
|
const CodeGenDAGPatterns::NodeXForm &Entry =
|
|
CGP.getSDNodeTransform(NodeXForms[i]);
|
|
|
|
Record *SDNode = Entry.first;
|
|
const std::string &Code = Entry.second;
|
|
|
|
OS << " case " << i << ": { ";
|
|
if (!OmitComments)
|
|
OS << "// " << NodeXForms[i]->getName();
|
|
OS << '\n';
|
|
|
|
std::string ClassName = CGP.getSDNodeInfo(SDNode).getSDClassName();
|
|
if (ClassName == "SDNode")
|
|
OS << " SDNode *N = V.getNode();\n";
|
|
else
|
|
OS << " " << ClassName << " *N = cast<" << ClassName
|
|
<< ">(V.getNode());\n";
|
|
OS << Code << "\n }\n";
|
|
}
|
|
OS << " }\n";
|
|
OS << "}\n\n";
|
|
}
|
|
}
|
|
|
|
static void BuildHistogram(const Matcher *M, std::vector<unsigned> &OpcodeFreq){
|
|
for (; M != nullptr; M = M->getNext()) {
|
|
// Count this node.
|
|
if (unsigned(M->getKind()) >= OpcodeFreq.size())
|
|
OpcodeFreq.resize(M->getKind()+1);
|
|
OpcodeFreq[M->getKind()]++;
|
|
|
|
// Handle recursive nodes.
|
|
if (const ScopeMatcher *SM = dyn_cast<ScopeMatcher>(M)) {
|
|
for (unsigned i = 0, e = SM->getNumChildren(); i != e; ++i)
|
|
BuildHistogram(SM->getChild(i), OpcodeFreq);
|
|
} else if (const SwitchOpcodeMatcher *SOM =
|
|
dyn_cast<SwitchOpcodeMatcher>(M)) {
|
|
for (unsigned i = 0, e = SOM->getNumCases(); i != e; ++i)
|
|
BuildHistogram(SOM->getCaseMatcher(i), OpcodeFreq);
|
|
} else if (const SwitchTypeMatcher *STM = dyn_cast<SwitchTypeMatcher>(M)) {
|
|
for (unsigned i = 0, e = STM->getNumCases(); i != e; ++i)
|
|
BuildHistogram(STM->getCaseMatcher(i), OpcodeFreq);
|
|
}
|
|
}
|
|
}
|
|
|
|
void MatcherTableEmitter::EmitHistogram(const Matcher *M,
|
|
formatted_raw_ostream &OS) {
|
|
if (OmitComments)
|
|
return;
|
|
|
|
std::vector<unsigned> OpcodeFreq;
|
|
BuildHistogram(M, OpcodeFreq);
|
|
|
|
OS << " // Opcode Histogram:\n";
|
|
for (unsigned i = 0, e = OpcodeFreq.size(); i != e; ++i) {
|
|
OS << " // #";
|
|
switch ((Matcher::KindTy)i) {
|
|
case Matcher::Scope: OS << "OPC_Scope"; break;
|
|
case Matcher::RecordNode: OS << "OPC_RecordNode"; break;
|
|
case Matcher::RecordChild: OS << "OPC_RecordChild"; break;
|
|
case Matcher::RecordMemRef: OS << "OPC_RecordMemRef"; break;
|
|
case Matcher::CaptureGlueInput: OS << "OPC_CaptureGlueInput"; break;
|
|
case Matcher::MoveChild: OS << "OPC_MoveChild"; break;
|
|
case Matcher::MoveParent: OS << "OPC_MoveParent"; break;
|
|
case Matcher::CheckSame: OS << "OPC_CheckSame"; break;
|
|
case Matcher::CheckChildSame: OS << "OPC_CheckChildSame"; break;
|
|
case Matcher::CheckPatternPredicate:
|
|
OS << "OPC_CheckPatternPredicate"; break;
|
|
case Matcher::CheckPredicate: OS << "OPC_CheckPredicate"; break;
|
|
case Matcher::CheckOpcode: OS << "OPC_CheckOpcode"; break;
|
|
case Matcher::SwitchOpcode: OS << "OPC_SwitchOpcode"; break;
|
|
case Matcher::CheckType: OS << "OPC_CheckType"; break;
|
|
case Matcher::SwitchType: OS << "OPC_SwitchType"; break;
|
|
case Matcher::CheckChildType: OS << "OPC_CheckChildType"; break;
|
|
case Matcher::CheckInteger: OS << "OPC_CheckInteger"; break;
|
|
case Matcher::CheckChildInteger: OS << "OPC_CheckChildInteger"; break;
|
|
case Matcher::CheckCondCode: OS << "OPC_CheckCondCode"; break;
|
|
case Matcher::CheckValueType: OS << "OPC_CheckValueType"; break;
|
|
case Matcher::CheckComplexPat: OS << "OPC_CheckComplexPat"; break;
|
|
case Matcher::CheckAndImm: OS << "OPC_CheckAndImm"; break;
|
|
case Matcher::CheckOrImm: OS << "OPC_CheckOrImm"; break;
|
|
case Matcher::CheckFoldableChainNode:
|
|
OS << "OPC_CheckFoldableChainNode"; break;
|
|
case Matcher::EmitInteger: OS << "OPC_EmitInteger"; break;
|
|
case Matcher::EmitStringInteger: OS << "OPC_EmitStringInteger"; break;
|
|
case Matcher::EmitRegister: OS << "OPC_EmitRegister"; break;
|
|
case Matcher::EmitConvertToTarget: OS << "OPC_EmitConvertToTarget"; break;
|
|
case Matcher::EmitMergeInputChains: OS << "OPC_EmitMergeInputChains"; break;
|
|
case Matcher::EmitCopyToReg: OS << "OPC_EmitCopyToReg"; break;
|
|
case Matcher::EmitNode: OS << "OPC_EmitNode"; break;
|
|
case Matcher::MorphNodeTo: OS << "OPC_MorphNodeTo"; break;
|
|
case Matcher::EmitNodeXForm: OS << "OPC_EmitNodeXForm"; break;
|
|
case Matcher::MarkGlueResults: OS << "OPC_MarkGlueResults"; break;
|
|
case Matcher::CompleteMatch: OS << "OPC_CompleteMatch"; break;
|
|
}
|
|
|
|
OS.PadToColumn(40) << " = " << OpcodeFreq[i] << '\n';
|
|
}
|
|
OS << '\n';
|
|
}
|
|
|
|
|
|
void llvm::EmitMatcherTable(const Matcher *TheMatcher,
|
|
const CodeGenDAGPatterns &CGP,
|
|
raw_ostream &O) {
|
|
formatted_raw_ostream OS(O);
|
|
|
|
OS << "// The main instruction selector code.\n";
|
|
OS << "SDNode *SelectCode(SDNode *N) {\n";
|
|
|
|
MatcherTableEmitter MatcherEmitter(CGP);
|
|
|
|
OS << " // Some target values are emitted as 2 bytes, TARGET_VAL handles\n";
|
|
OS << " // this.\n";
|
|
OS << " #define TARGET_VAL(X) X & 255, unsigned(X) >> 8\n";
|
|
OS << " static const unsigned char MatcherTable[] = {\n";
|
|
unsigned TotalSize = MatcherEmitter.EmitMatcherList(TheMatcher, 6, 0, OS);
|
|
OS << " 0\n }; // Total Array size is " << (TotalSize+1) << " bytes\n\n";
|
|
|
|
MatcherEmitter.EmitHistogram(TheMatcher, OS);
|
|
|
|
OS << " #undef TARGET_VAL\n";
|
|
OS << " return SelectCodeCommon(N, MatcherTable,sizeof(MatcherTable));\n}\n";
|
|
OS << '\n';
|
|
|
|
// Next up, emit the function for node and pattern predicates:
|
|
MatcherEmitter.EmitPredicateFunctions(OS);
|
|
}
|