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llvm-6502/utils/TableGen/DAGISelMatcherEmitter.cpp
Chris Lattner 57fcd03611 so hey, it turns out that the histogram was completely wrong, because 
we sometimes emit nodes multiple times to string buffers to size them.
Compute the histogram correctly.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@97708 91177308-0d34-0410-b5e6-96231b3b80d8
2010-03-04 01:34:29 +00:00

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//===- 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/CommandLine.h"
#include "llvm/Support/FormattedStream.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 {
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<Record*> NodeXForms;
public:
MatcherTableEmitter() {}
unsigned EmitMatcherList(const Matcher *N, unsigned Indent,
unsigned StartIdx, formatted_raw_ostream &OS);
void EmitPredicateFunctions(const CodeGenDAGPatterns &CGP,
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(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.
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;
}
/// EmitMatcherOpcodes - 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() == 0 && "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::CaptureFlagInput:
OS << "OPC_CaptureFlagInput,\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::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: {
StringRef Pred = cast<CheckPredicateMatcher>(N)->getPredicateName();
OS << "OPC_CheckPredicate, " << getNodePredicate(Pred) << ',';
if (!OmitComments)
OS.PadToColumn(CommentIndent) << "// " << Pred;
OS << '\n';
return 2;
}
case Matcher::CheckOpcode:
OS << "OPC_CheckOpcode, "
<< cast<CheckOpcodeMatcher>(N)->getOpcode().getEnumName() << ",\n";
return 2;
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;
if (const SwitchOpcodeMatcher *SOM = dyn_cast<SwitchOpcodeMatcher>(N))
Child = SOM->getCaseMatcher(i);
else
Child = cast<SwitchTypeMatcher>(N)->getCaseMatcher(i);
// 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+1, FOS);
} while (GetVBRSize(ChildSize) != VBRSize);
assert(ChildSize != 0 && "Should not have a zero-sized child!");
if (i != 0) {
OS.PadToColumn(Indent*2);
if (!OmitComments)
OS << (isa<SwitchOpcodeMatcher>(N) ?
"/*SwitchOpcode*/ " : "/*SwitchType*/ ");
}
// Emit the VBR.
CurrentIdx += EmitVBRValue(ChildSize, OS);
OS << ' ';
if (const SwitchOpcodeMatcher *SOM = dyn_cast<SwitchOpcodeMatcher>(N))
OS << SOM->getCaseOpcode(i).getEnumName();
else
OS << getEnumName(cast<SwitchTypeMatcher>(N)->getCaseType(i));
OS << ',';
if (!OmitComments)
OS << "// ->" << CurrentIdx+ChildSize+1;
OS << '\n';
++CurrentIdx;
OS << TmpBuf.str();
CurrentIdx += ChildSize;
}
// Emit the final zero to terminate the switch.
OS.PadToColumn(Indent*2) << "0, ";
if (!OmitComments)
OS << (isa<SwitchOpcodeMatcher>(N) ?
"// EndSwitchOpcode" : "// EndSwitchType");
OS << '\n';
++CurrentIdx;
return CurrentIdx-StartIdx;
}
case Matcher::CheckType:
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::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:
OS << "OPC_EmitRegister, "
<< getEnumName(cast<EmitRegisterMatcher>(N)->getVT()) << ", ";
if (Record *R = cast<EmitRegisterMatcher>(N)->getReg())
OS << getQualifiedName(R) << ",\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);
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_OPCODE(" << EN->getOpcodeName() << "), 0";
if (EN->hasChain()) OS << "|OPFL_Chain";
if (EN->hasInFlag()) OS << "|OPFL_FlagInput";
if (EN->hasOutFlag()) OS << "|OPFL_FlagOutput";
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() << '\n';
OS.PadToColumn(Indent*2) << "// Dst: "
<< *SNT->getPattern().getDstPattern() << '\n';
}
} else
OS << '\n';
return 6+EN->getNumVTs()+NumOperandBytes;
}
case Matcher::MarkFlagResults: {
const MarkFlagResultsMatcher *CFR = cast<MarkFlagResultsMatcher>(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 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() << '\n';
OS.PadToColumn(Indent*2) << "// Dst: "
<< *CM->getPattern().getDstPattern();
}
OS << '\n';
return 2 + NumResultBytes;
}
}
assert(0 && "Unreachable");
return 0;
}
/// 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(const CodeGenDAGPatterns &CGP,
formatted_raw_ostream &OS) {
// Emit pattern predicates.
if (!PatternPredicates.empty()) {
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.
// 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, 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) {
// FIXME: Storing this by name is horrible.
TreePattern *P =PFsByName[NodePredicates[i].substr(strlen("Predicate_"))];
assert(P && "Unknown name?");
// Emit the predicate code corresponding to this pattern.
std::string Code = P->getRecord()->getValueAsCode("Predicate");
assert(!Code.empty() && "No code in this predicate");
OS << " case " << i << ": { // " << NodePredicates[i] << '\n';
std::string ClassName;
if (P->getOnlyTree()->isLeaf())
ClassName = "SDNode";
else
ClassName =
CGP.getSDNodeInfo(P->getOnlyTree()->getOperator()).getSDClassName();
if (ClassName == "SDNode")
OS << " SDNode *N = Node;\n";
else
OS << " " << ClassName << "*N = cast<" << ClassName << ">(Node);\n";
OS << Code << "\n }\n";
}
OS << " }\n";
OS << "}\n\n";
}
// Emit CompletePattern matchers.
// FIXME: This should be const.
if (!ComplexPatterns.empty()) {
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();
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.
if (!NodeXForms.empty()) {
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) {
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 != 0; 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::CaptureFlagInput: OS << "OPC_CaptureFlagInput"; break;
case Matcher::MoveChild: OS << "OPC_MoveChild"; break;
case Matcher::MoveParent: OS << "OPC_MoveParent"; break;
case Matcher::CheckSame: OS << "OPC_CheckSame"; 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::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::MarkFlagResults: OS << "OPC_MarkFlagResults"; 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;
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(TheMatcher, 5, 0, OS);
OS << " 0\n }; // Total Array size is " << (TotalSize+1) << " bytes\n\n";
MatcherEmitter.EmitHistogram(TheMatcher, OS);
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(CGP, OS);
}
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