mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-09-10 22:55:57 +00:00
the new isel: fold movechild+record+moveparent into a single recordchild N node. This shrinks the X86 table from 125443 to 117502 bytes. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@97031 91177308-0d34-0410-b5e6-96231b3b80d8
522 lines
17 KiB
C++
522 lines
17 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 a matcher.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "DAGISelMatcher.h"
|
|
#include "CodeGenDAGPatterns.h"
|
|
#include "Record.h"
|
|
#include "llvm/ADT/DenseMap.h"
|
|
#include "llvm/ADT/SmallString.h"
|
|
#include "llvm/ADT/StringMap.h"
|
|
#include "llvm/Support/FormattedStream.h"
|
|
using namespace llvm;
|
|
|
|
namespace {
|
|
enum {
|
|
CommentIndent = 30
|
|
};
|
|
}
|
|
|
|
/// ClassifyInt - Classify an integer by size, return '1','2','4','8' if this
|
|
/// fits in 1, 2, 4, or 8 sign extended bytes.
|
|
static char ClassifyInt(int64_t Val) {
|
|
if (Val == int8_t(Val)) return '1';
|
|
if (Val == int16_t(Val)) return '2';
|
|
if (Val == int32_t(Val)) return '4';
|
|
return '8';
|
|
}
|
|
|
|
/// EmitInt - Emit the specified integer, returning the number of bytes emitted.
|
|
static unsigned EmitInt(int64_t Val, formatted_raw_ostream &OS) {
|
|
unsigned BytesEmitted = 1;
|
|
OS << (int)(unsigned char)Val << ", ";
|
|
if (Val == int8_t(Val)) {
|
|
OS << '\n';
|
|
return BytesEmitted;
|
|
}
|
|
|
|
OS << (int)(unsigned char)(Val >> 8) << ", ";
|
|
++BytesEmitted;
|
|
|
|
if (Val != int16_t(Val)) {
|
|
OS << (int)(unsigned char)(Val >> 16) << ", "
|
|
<< (int)(unsigned char)(Val >> 24) << ", ";
|
|
BytesEmitted += 2;
|
|
|
|
if (Val != int32_t(Val)) {
|
|
OS << (int)(unsigned char)(Val >> 32) << ", "
|
|
<< (int)(unsigned char)(Val >> 40) << ", "
|
|
<< (int)(unsigned char)(Val >> 48) << ", "
|
|
<< (int)(unsigned char)(Val >> 56) << ", ";
|
|
BytesEmitted += 4;
|
|
}
|
|
}
|
|
|
|
OS.PadToColumn(CommentIndent) << "// " << Val << " aka 0x";
|
|
OS.write_hex(Val) << '\n';
|
|
return BytesEmitted;
|
|
}
|
|
|
|
namespace {
|
|
class MatcherTableEmitter {
|
|
StringMap<unsigned> NodePredicateMap, PatternPredicateMap;
|
|
std::vector<std::string> NodePredicates, PatternPredicates;
|
|
|
|
DenseMap<const ComplexPattern*, unsigned> ComplexPatternMap;
|
|
std::vector<const ComplexPattern*> ComplexPatterns;
|
|
|
|
|
|
DenseMap<Record*, unsigned> NodeXFormMap;
|
|
std::vector<const Record*> NodeXForms;
|
|
|
|
public:
|
|
MatcherTableEmitter() {}
|
|
|
|
unsigned EmitMatcherList(const MatcherNode *N, unsigned Indent,
|
|
unsigned StartIdx, formatted_raw_ostream &OS);
|
|
|
|
void EmitPredicateFunctions(formatted_raw_ostream &OS);
|
|
private:
|
|
unsigned EmitMatcher(const MatcherNode *N, unsigned Indent,
|
|
formatted_raw_ostream &OS);
|
|
|
|
unsigned getNodePredicate(StringRef PredName) {
|
|
unsigned &Entry = NodePredicateMap[PredName];
|
|
if (Entry == 0) {
|
|
NodePredicates.push_back(PredName.str());
|
|
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.
|
|
|
|
/// EmitVBRValue - Emit the specified value as a VBR, returning the number of
|
|
/// bytes emitted.
|
|
static unsigned EmitVBRValue(unsigned Val, raw_ostream &OS) {
|
|
if (Val <= 127) {
|
|
OS << Val << ", ";
|
|
return 1;
|
|
}
|
|
|
|
unsigned InVal = Val;
|
|
unsigned NumBytes = 0;
|
|
while (Val >= 128) {
|
|
OS << (Val&127) << "|128,";
|
|
Val >>= 7;
|
|
++NumBytes;
|
|
}
|
|
OS << Val << "/*" << InVal << "*/, ";
|
|
return NumBytes+1;
|
|
}
|
|
|
|
/// EmitMatcherOpcodes - Emit bytes for the specified matcher and return
|
|
/// the number of bytes emitted.
|
|
unsigned MatcherTableEmitter::
|
|
EmitMatcher(const MatcherNode *N, unsigned Indent, formatted_raw_ostream &OS) {
|
|
OS.PadToColumn(Indent*2);
|
|
|
|
switch (N->getKind()) {
|
|
case MatcherNode::Push: assert(0 && "Should be handled by caller");
|
|
case MatcherNode::RecordNode:
|
|
OS << "OPC_RecordNode,";
|
|
OS.PadToColumn(CommentIndent) << "// "
|
|
<< cast<RecordMatcherNode>(N)->getWhatFor() << '\n';
|
|
return 1;
|
|
|
|
case MatcherNode::RecordChild:
|
|
OS << "OPC_RecordChild" << cast<RecordChildMatcherNode>(N)->getChildNo()
|
|
<< ',';
|
|
OS.PadToColumn(CommentIndent) << "// "
|
|
<< cast<RecordChildMatcherNode>(N)->getWhatFor() << '\n';
|
|
return 1;
|
|
|
|
case MatcherNode::RecordMemRef:
|
|
OS << "OPC_RecordMemRef,\n";
|
|
return 1;
|
|
|
|
case MatcherNode::CaptureFlagInput:
|
|
OS << "OPC_CaptureFlagInput,\n";
|
|
return 1;
|
|
|
|
case MatcherNode::MoveChild:
|
|
OS << "OPC_MoveChild, "
|
|
<< cast<MoveChildMatcherNode>(N)->getChildNo() << ",\n";
|
|
return 2;
|
|
|
|
case MatcherNode::MoveParent:
|
|
OS << "OPC_MoveParent,\n";
|
|
return 1;
|
|
|
|
case MatcherNode::CheckSame:
|
|
OS << "OPC_CheckSame, "
|
|
<< cast<CheckSameMatcherNode>(N)->getMatchNumber() << ",\n";
|
|
return 2;
|
|
|
|
case MatcherNode::CheckPatternPredicate: {
|
|
StringRef Pred = cast<CheckPatternPredicateMatcherNode>(N)->getPredicate();
|
|
OS << "OPC_CheckPatternPredicate, " << getPatternPredicate(Pred) << ',';
|
|
OS.PadToColumn(CommentIndent) << "// " << Pred << '\n';
|
|
return 2;
|
|
}
|
|
case MatcherNode::CheckPredicate: {
|
|
StringRef Pred = cast<CheckPredicateMatcherNode>(N)->getPredicateName();
|
|
OS << "OPC_CheckPredicate, " << getNodePredicate(Pred) << ',';
|
|
OS.PadToColumn(CommentIndent) << "// " << Pred << '\n';
|
|
return 2;
|
|
}
|
|
|
|
case MatcherNode::CheckOpcode:
|
|
OS << "OPC_CheckOpcode, "
|
|
<< cast<CheckOpcodeMatcherNode>(N)->getOpcodeName() << ",\n";
|
|
return 2;
|
|
|
|
case MatcherNode::CheckMultiOpcode: {
|
|
const CheckMultiOpcodeMatcherNode *CMO=cast<CheckMultiOpcodeMatcherNode>(N);
|
|
OS << "OPC_CheckMultiOpcode, " << CMO->getNumOpcodeNames() << ", ";
|
|
for (unsigned i = 0, e = CMO->getNumOpcodeNames(); i != e; ++i)
|
|
OS << CMO->getOpcodeName(i) << ", ";
|
|
OS << '\n';
|
|
return 2 + CMO->getNumOpcodeNames();
|
|
}
|
|
|
|
case MatcherNode::CheckType:
|
|
OS << "OPC_CheckType, "
|
|
<< getEnumName(cast<CheckTypeMatcherNode>(N)->getType()) << ",\n";
|
|
return 2;
|
|
|
|
case MatcherNode::CheckInteger: {
|
|
int64_t Val = cast<CheckIntegerMatcherNode>(N)->getValue();
|
|
OS << "OPC_CheckInteger" << ClassifyInt(Val) << ", ";
|
|
return EmitInt(Val, OS)+1;
|
|
}
|
|
case MatcherNode::CheckCondCode:
|
|
OS << "OPC_CheckCondCode, ISD::"
|
|
<< cast<CheckCondCodeMatcherNode>(N)->getCondCodeName() << ",\n";
|
|
return 2;
|
|
|
|
case MatcherNode::CheckValueType:
|
|
OS << "OPC_CheckValueType, MVT::"
|
|
<< cast<CheckValueTypeMatcherNode>(N)->getTypeName() << ",\n";
|
|
return 2;
|
|
|
|
case MatcherNode::CheckComplexPat: {
|
|
const ComplexPattern &Pattern =
|
|
cast<CheckComplexPatMatcherNode>(N)->getPattern();
|
|
OS << "OPC_CheckComplexPat, " << getComplexPat(Pattern) << ',';
|
|
OS.PadToColumn(CommentIndent) << "// " << Pattern.getSelectFunc();
|
|
OS << ": " << Pattern.getNumOperands() << " operands";
|
|
if (Pattern.hasProperty(SDNPHasChain))
|
|
OS << " + chain result and input";
|
|
OS << '\n';
|
|
return 2;
|
|
}
|
|
|
|
case MatcherNode::CheckAndImm: {
|
|
int64_t Val = cast<CheckAndImmMatcherNode>(N)->getValue();
|
|
OS << "OPC_CheckAndImm" << ClassifyInt(Val) << ", ";
|
|
return EmitInt(Val, OS)+1;
|
|
}
|
|
|
|
case MatcherNode::CheckOrImm: {
|
|
int64_t Val = cast<CheckOrImmMatcherNode>(N)->getValue();
|
|
OS << "OPC_CheckOrImm" << ClassifyInt(Val) << ", ";
|
|
return EmitInt(Val, OS)+1;
|
|
}
|
|
case MatcherNode::CheckFoldableChainNode:
|
|
OS << "OPC_CheckFoldableChainNode,\n";
|
|
return 1;
|
|
case MatcherNode::CheckChainCompatible:
|
|
OS << "OPC_CheckChainCompatible, "
|
|
<< cast<CheckChainCompatibleMatcherNode>(N)->getPreviousOp() << ",\n";
|
|
return 2;
|
|
|
|
case MatcherNode::EmitInteger: {
|
|
int64_t Val = cast<EmitIntegerMatcherNode>(N)->getValue();
|
|
OS << "OPC_EmitInteger" << ClassifyInt(Val) << ", "
|
|
<< getEnumName(cast<EmitIntegerMatcherNode>(N)->getVT()) << ", ";
|
|
return EmitInt(Val, OS)+2;
|
|
}
|
|
case MatcherNode::EmitStringInteger: {
|
|
const std::string &Val = cast<EmitStringIntegerMatcherNode>(N)->getValue();
|
|
// These should always fit into one byte.
|
|
OS << "OPC_EmitInteger1, "
|
|
<< getEnumName(cast<EmitStringIntegerMatcherNode>(N)->getVT()) << ", "
|
|
<< Val << ",\n";
|
|
return 3;
|
|
}
|
|
|
|
case MatcherNode::EmitRegister:
|
|
OS << "OPC_EmitRegister, "
|
|
<< getEnumName(cast<EmitRegisterMatcherNode>(N)->getVT()) << ", ";
|
|
if (Record *R = cast<EmitRegisterMatcherNode>(N)->getReg())
|
|
OS << getQualifiedName(R) << ",\n";
|
|
else
|
|
OS << "0 /*zero_reg*/,\n";
|
|
return 3;
|
|
|
|
case MatcherNode::EmitConvertToTarget:
|
|
OS << "OPC_EmitConvertToTarget, "
|
|
<< cast<EmitConvertToTargetMatcherNode>(N)->getSlot() << ",\n";
|
|
return 2;
|
|
|
|
case MatcherNode::EmitMergeInputChains: {
|
|
const EmitMergeInputChainsMatcherNode *MN =
|
|
cast<EmitMergeInputChainsMatcherNode>(N);
|
|
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 MatcherNode::EmitCopyToReg:
|
|
OS << "OPC_EmitCopyToReg, "
|
|
<< cast<EmitCopyToRegMatcherNode>(N)->getSrcSlot() << ", "
|
|
<< getQualifiedName(cast<EmitCopyToRegMatcherNode>(N)->getDestPhysReg())
|
|
<< ",\n";
|
|
return 3;
|
|
case MatcherNode::EmitNodeXForm: {
|
|
const EmitNodeXFormMatcherNode *XF = cast<EmitNodeXFormMatcherNode>(N);
|
|
OS << "OPC_EmitNodeXForm, " << getNodeXFormID(XF->getNodeXForm()) << ", "
|
|
<< XF->getSlot() << ',';
|
|
OS.PadToColumn(CommentIndent) << "// "<<XF->getNodeXForm()->getName()<<'\n';
|
|
return 3;
|
|
}
|
|
|
|
case MatcherNode::EmitNode: {
|
|
const EmitNodeMatcherNode *EN = cast<EmitNodeMatcherNode>(N);
|
|
OS << "OPC_EmitNode, TARGET_OPCODE(" << EN->getOpcodeName() << "), 0";
|
|
|
|
if (EN->hasChain()) OS << "|OPFL_Chain";
|
|
if (EN->hasFlag()) OS << "|OPFL_Flag";
|
|
if (EN->hasMemRefs()) OS << "|OPFL_MemRefs";
|
|
if (EN->getNumFixedArityOperands() != -1)
|
|
OS << "|OPFL_Variadic" << EN->getNumFixedArityOperands();
|
|
OS << ",\n";
|
|
|
|
OS.PadToColumn(Indent*2+4) << EN->getNumVTs() << "/*#VTs*/, ";
|
|
for (unsigned i = 0, e = EN->getNumVTs(); i != e; ++i)
|
|
OS << getEnumName(EN->getVT(i)) << ", ";
|
|
|
|
OS << EN->getNumOperands() << "/*#Ops*/, ";
|
|
unsigned NumOperandBytes = 0;
|
|
for (unsigned i = 0, e = EN->getNumOperands(); i != e; ++i) {
|
|
// We emit the operand numbers in VBR encoded format, in case the number
|
|
// is too large to represent with a byte.
|
|
NumOperandBytes += EmitVBRValue(EN->getOperand(i), OS);
|
|
}
|
|
OS << '\n';
|
|
return 6+EN->getNumVTs()+NumOperandBytes;
|
|
}
|
|
case MatcherNode::MarkFlagResults: {
|
|
const MarkFlagResultsMatcherNode *CFR = cast<MarkFlagResultsMatcherNode>(N);
|
|
OS << "OPC_MarkFlagResults, " << 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 MatcherNode::CompleteMatch: {
|
|
const CompleteMatchMatcherNode *CM = cast<CompleteMatchMatcherNode>(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';
|
|
OS.PadToColumn(Indent*2) << "// Src: "
|
|
<< *CM->getPattern().getSrcPattern() << '\n';
|
|
OS.PadToColumn(Indent*2) << "// Dst: "
|
|
<< *CM->getPattern().getDstPattern() << '\n';
|
|
return 2 + NumResultBytes;
|
|
}
|
|
}
|
|
assert(0 && "Unreachable");
|
|
return 0;
|
|
}
|
|
|
|
/// EmitMatcherList - Emit the bytes for the specified matcher subtree.
|
|
unsigned MatcherTableEmitter::
|
|
EmitMatcherList(const MatcherNode *N, unsigned Indent, unsigned CurrentIdx,
|
|
formatted_raw_ostream &OS) {
|
|
unsigned Size = 0;
|
|
while (N) {
|
|
// Push is a special case since it is binary.
|
|
if (const PushMatcherNode *PMN = dyn_cast<PushMatcherNode>(N)) {
|
|
// 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.
|
|
SmallString<128> TmpBuf;
|
|
unsigned NextSize;
|
|
{
|
|
raw_svector_ostream OS(TmpBuf);
|
|
formatted_raw_ostream FOS(OS);
|
|
NextSize = EmitMatcherList(cast<PushMatcherNode>(N)->getNext(),
|
|
Indent+1, CurrentIdx+2, FOS);
|
|
}
|
|
|
|
// In the unlikely event that we have something too big to emit with a
|
|
// one byte offset, regenerate it with a two-byte one.
|
|
if (NextSize > 255) {
|
|
TmpBuf.clear();
|
|
raw_svector_ostream OS(TmpBuf);
|
|
formatted_raw_ostream FOS(OS);
|
|
NextSize = EmitMatcherList(cast<PushMatcherNode>(N)->getNext(),
|
|
Indent+1, CurrentIdx+3, FOS);
|
|
if (NextSize > 65535) {
|
|
errs() <<
|
|
"Tblgen internal error: can't handle pattern this complex yet\n";
|
|
exit(1);
|
|
}
|
|
}
|
|
|
|
OS << "/*" << CurrentIdx << "*/";
|
|
OS.PadToColumn(Indent*2);
|
|
|
|
if (NextSize < 256)
|
|
OS << "OPC_Push, " << NextSize << ",\n";
|
|
else
|
|
OS << "OPC_Push2, " << (NextSize&255) << ", " << (NextSize>>8) << ",\n";
|
|
OS << TmpBuf.str();
|
|
|
|
Size += 2+NextSize;
|
|
CurrentIdx += 2+NextSize;
|
|
N = PMN->getFailure();
|
|
continue;
|
|
}
|
|
|
|
OS << "/*" << CurrentIdx << "*/";
|
|
unsigned MatcherSize = EmitMatcher(N, Indent, 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) {
|
|
// FIXME: Don't build off the DAGISelEmitter's predicates, emit them directly
|
|
// here into the case stmts.
|
|
|
|
// Emit pattern predicates.
|
|
OS << "bool CheckPatternPredicate(unsigned PredNo) const {\n";
|
|
OS << " switch (PredNo) {\n";
|
|
OS << " default: assert(0 && \"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.
|
|
OS << "bool CheckNodePredicate(SDNode *N, unsigned PredNo) const {\n";
|
|
OS << " switch (PredNo) {\n";
|
|
OS << " default: assert(0 && \"Invalid predicate in table?\");\n";
|
|
for (unsigned i = 0, e = NodePredicates.size(); i != e; ++i)
|
|
OS << " case " << i << ": return " << NodePredicates[i] << "(N);\n";
|
|
OS << " }\n";
|
|
OS << "}\n\n";
|
|
|
|
// Emit CompletePattern matchers.
|
|
// FIXME: This should be const.
|
|
OS << "bool CheckComplexPattern(SDNode *Root, SDValue N,\n";
|
|
OS << " unsigned PatternNo, SmallVectorImpl<SDValue> &Result) {\n";
|
|
OS << " switch (PatternNo) {\n";
|
|
OS << " default: assert(0 && \"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(Result.size()+" << NumOps << ");\n";
|
|
OS << " return " << P.getSelectFunc();
|
|
|
|
// FIXME: Temporary hack until old isel dies.
|
|
if (P.hasProperty(SDNPHasChain))
|
|
OS << "XXX";
|
|
|
|
OS << "(Root, N";
|
|
for (unsigned i = 0; i != NumOps; ++i)
|
|
OS << ", Result[Result.size()-" << (NumOps-i) << ']';
|
|
OS << ");\n";
|
|
}
|
|
OS << " }\n";
|
|
OS << "}\n\n";
|
|
|
|
// Emit SDNodeXForm handlers.
|
|
// FIXME: This should be const.
|
|
OS << "SDValue RunSDNodeXForm(SDValue V, unsigned XFormNo) {\n";
|
|
OS << " switch (XFormNo) {\n";
|
|
OS << " default: assert(0 && \"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)
|
|
OS << " case " << i << ": return Transform_" << NodeXForms[i]->getName()
|
|
<< "(V.getNode());\n";
|
|
OS << " }\n";
|
|
OS << "}\n\n";
|
|
}
|
|
|
|
|
|
void llvm::EmitMatcherTable(const MatcherNode *Matcher, raw_ostream &O) {
|
|
formatted_raw_ostream OS(O);
|
|
|
|
OS << "// The main instruction selector code.\n";
|
|
OS << "SDNode *SelectCode2(SDNode *N) {\n";
|
|
|
|
MatcherTableEmitter MatcherEmitter;
|
|
|
|
OS << " // Opcodes are emitted as 2 bytes, TARGET_OPCODE handles this.\n";
|
|
OS << " #define TARGET_OPCODE(X) X & 255, unsigned(X) >> 8\n";
|
|
OS << " static const unsigned char MatcherTable[] = {\n";
|
|
unsigned TotalSize = MatcherEmitter.EmitMatcherList(Matcher, 5, 0, OS);
|
|
OS << " 0\n }; // Total Array size is " << (TotalSize+1) << " bytes\n\n";
|
|
OS << " #undef TARGET_OPCODE\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);
|
|
}
|