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Divide select methods into groups by SelectionDAG node opcodes (ISD::ADD, 

X86ISD::CMP, etc.) instead of SDNode names (add, x86cmp, etc). We now allow
multiple SDNodes to map to the same SelectionDAG node (e.g. store, indexed
store).

llvm-svn: 31575
This commit is contained in:
Evan Cheng 2006-11-08 23:01:03 +00:00
parent eacb043c0a
commit 7120b9e9c7
1 changed files with 35 additions and 46 deletions
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81
llvm/utils/TableGen/DAGISelEmitter.cpp
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@ -3374,19 +3374,16 @@ void DAGISelEmitter::EmitPatterns(std::vector<std::pair<PatternToMatch*,
OS << std::string(Indent-2, ' ') << "}\n";
}
static std::string getOpcodeName(Record *Op, DAGISelEmitter &ISE) {
const SDNodeInfo &OpcodeInfo = ISE.getSDNodeInfo(Op);
return OpcodeInfo.getEnumName();
}
namespace {
/// CompareByRecordName - An ordering predicate that implements less-than by
/// comparing the names records.
struct CompareByRecordName {
bool operator()(const Record *LHS, const Record *RHS) const {
// Sort by name first.
if (LHS->getName() < RHS->getName()) return true;
// If both names are equal, sort by pointer.
return LHS->getName() == RHS->getName() && LHS < RHS;
}
};
static std::string getLegalCName(std::string OpName) {
std::string::size_type pos = OpName.find("::");
if (pos != std::string::npos)
OpName.replace(pos, 2, "_");
return OpName;
}
void DAGISelEmitter::EmitInstructionSelector(std::ostream &OS) {
@ -3394,23 +3391,25 @@ void DAGISelEmitter::EmitInstructionSelector(std::ostream &OS) {
if (!InstNS.empty()) InstNS += "::";
// Group the patterns by their top-level opcodes.
std::map<Record*, std::vector<PatternToMatch*>,
CompareByRecordName> PatternsByOpcode;
std::map<std::string, std::vector<PatternToMatch*> > PatternsByOpcode;
// All unique target node emission functions.
std::map<std::string, unsigned> EmitFunctions;
for (unsigned i = 0, e = PatternsToMatch.size(); i != e; ++i) {
TreePatternNode *Node = PatternsToMatch[i].getSrcPattern();
if (!Node->isLeaf()) {
PatternsByOpcode[Node->getOperator()].push_back(&PatternsToMatch[i]);
PatternsByOpcode[getOpcodeName(Node->getOperator(), *this)].
push_back(&PatternsToMatch[i]);
} else {
const ComplexPattern *CP;
if (dynamic_cast<IntInit*>(Node->getLeafValue())) {
PatternsByOpcode[getSDNodeNamed("imm")].push_back(&PatternsToMatch[i]);
PatternsByOpcode[getOpcodeName(getSDNodeNamed("imm"), *this)].
push_back(&PatternsToMatch[i]);
} else if ((CP = NodeGetComplexPattern(Node, *this))) {
std::vector<Record*> OpNodes = CP->getRootNodes();
for (unsigned j = 0, e = OpNodes.size(); j != e; j++) {
PatternsByOpcode[OpNodes[j]]
.insert(PatternsByOpcode[OpNodes[j]].begin(), &PatternsToMatch[i]);
PatternsByOpcode[getOpcodeName(OpNodes[j], *this)]
.insert(PatternsByOpcode[getOpcodeName(OpNodes[j], *this)].begin(),
&PatternsToMatch[i]);
}
} else {
std::cerr << "Unrecognized opcode '";
@ -3432,11 +3431,10 @@ void DAGISelEmitter::EmitInstructionSelector(std::ostream &OS) {
// Emit one Select_* method for each top-level opcode. We do this instead of
// emitting one giant switch statement to support compilers where this will
// result in the recursive functions taking less stack space.
for (std::map<Record*, std::vector<PatternToMatch*>,
CompareByRecordName>::iterator PBOI = PatternsByOpcode.begin(),
E = PatternsByOpcode.end(); PBOI != E; ++PBOI) {
const std::string &OpName = PBOI->first->getName();
const SDNodeInfo &OpcodeInfo = getSDNodeInfo(PBOI->first);
for (std::map<std::string, std::vector<PatternToMatch*> >::iterator
PBOI = PatternsByOpcode.begin(), E = PatternsByOpcode.end();
PBOI != E; ++PBOI) {
const std::string &OpName = PBOI->first;
std::vector<PatternToMatch*> &PatternsOfOp = PBOI->second;
assert(!PatternsOfOp.empty() && "No patterns but map has entry?");
@ -3451,8 +3449,6 @@ void DAGISelEmitter::EmitInstructionSelector(std::ostream &OS) {
for (unsigned i = 0, e = PatternsOfOp.size(); i != e; ++i) {
PatternToMatch *Pat = PatternsOfOp[i];
TreePatternNode *SrcPat = Pat->getSrcPattern();
if (OpcodeInfo.getNumResults() == 0 && SrcPat->getNumChildren() > 0)
SrcPat = SrcPat->getChild(0);
MVT::ValueType VT = SrcPat->getTypeNum(0);
std::map<MVT::ValueType, std::vector<PatternToMatch*> >::iterator TI =
PatternsByType.find(VT);
@ -3595,7 +3591,8 @@ void DAGISelEmitter::EmitInstructionSelector(std::ostream &OS) {
} else
OpVTI->second.push_back(OpVTStr);
OS << "SDNode *Select_" << OpName << (OpVTStr != "" ? "_" : "")
OS << "SDNode *Select_" << getLegalCName(OpName)
<< (OpVTStr != "" ? "_" : "")
<< OpVTStr << "(const SDOperand &N) {\n";
// Loop through and reverse all of the CodeList vectors, as we will be
@ -3616,9 +3613,9 @@ void DAGISelEmitter::EmitInstructionSelector(std::ostream &OS) {
// catch the case where nothing handles a pattern.
if (mightNotMatch) {
OS << " std::cerr << \"Cannot yet select: \";\n";
if (OpcodeInfo.getEnumName() != "ISD::INTRINSIC_W_CHAIN" &&
OpcodeInfo.getEnumName() != "ISD::INTRINSIC_WO_CHAIN" &&
OpcodeInfo.getEnumName() != "ISD::INTRINSIC_VOID") {
if (OpName != "ISD::INTRINSIC_W_CHAIN" &&
OpName != "ISD::INTRINSIC_WO_CHAIN" &&
OpName != "ISD::INTRINSIC_VOID") {
OS << " N.Val->dump(CurDAG);\n";
} else {
OS << " unsigned iid = cast<ConstantSDNode>(N.getOperand("
@ -3657,6 +3654,7 @@ void DAGISelEmitter::EmitInstructionSelector(std::ostream &OS) {
<< "INSTRUCTION_LIST_END)) {\n"
<< " return NULL; // Already selected.\n"
<< " }\n\n"
<< " MVT::ValueType NVT = N.Val->getValueType(0);\n"
<< " switch (N.getOpcode()) {\n"
<< " default: break;\n"
<< " case ISD::EntryToken: // These leaves remain the same.\n"
@ -3688,31 +3686,22 @@ void DAGISelEmitter::EmitInstructionSelector(std::ostream &OS) {
// Loop over all of the case statements, emiting a call to each method we
// emitted above.
for (std::map<Record*, std::vector<PatternToMatch*>,
CompareByRecordName>::iterator PBOI = PatternsByOpcode.begin(),
E = PatternsByOpcode.end(); PBOI != E; ++PBOI) {
const SDNodeInfo &OpcodeInfo = getSDNodeInfo(PBOI->first);
const std::string &OpName = PBOI->first->getName();
for (std::map<std::string, std::vector<PatternToMatch*> >::iterator
PBOI = PatternsByOpcode.begin(), E = PatternsByOpcode.end();
PBOI != E; ++PBOI) {
const std::string &OpName = PBOI->first;
// Potentially multiple versions of select for this opcode. One for each
// ValueType of the node (or its first true operand if it doesn't produce a
// result.
std::map<std::string, std::vector<std::string> >::iterator OpVTI =
OpcodeVTMap.find(OpName);
std::vector<std::string> &OpVTs = OpVTI->second;
OS << " case " << OpcodeInfo.getEnumName() << ": {\n";
OS << " case " << OpName << ": {\n";
if (OpVTs.size() == 1) {
std::string &VTStr = OpVTs[0];
OS << " return Select_" << OpName
OS << " return Select_" << getLegalCName(OpName)
<< (VTStr != "" ? "_" : "") << VTStr << "(N);\n";
} else {
if (OpcodeInfo.getNumResults())
OS << " MVT::ValueType NVT = N.Val->getValueType(0);\n";
else if (OpcodeInfo.hasProperty(SDNPHasChain))
OS << " MVT::ValueType NVT = (N.getNumOperands() > 1) ?"
<< " N.getOperand(1).Val->getValueType(0) : MVT::isVoid;\n";
else
OS << " MVT::ValueType NVT = (N.getNumOperands() > 0) ?"
<< " N.getOperand(0).Val->getValueType(0) : MVT::isVoid;\n";
int Default = -1;
OS << " switch (NVT) {\n";
for (unsigned i = 0, e = OpVTs.size(); i < e; ++i) {
@ -3722,12 +3711,12 @@ void DAGISelEmitter::EmitInstructionSelector(std::ostream &OS) {
continue;
}
OS << " case MVT::" << VTStr << ":\n"
<< " return Select_" << OpName
<< " return Select_" << getLegalCName(OpName)
<< "_" << VTStr << "(N);\n";
}
OS << " default:\n";
if (Default != -1)
OS << " return Select_" << OpName << "(N);\n";
OS << " return Select_" << getLegalCName(OpName) << "(N);\n";
else
OS << " break;\n";
OS << " }\n";