}
};
+// IAPrinter - Holds information about an InstAlias. Two InstAliases match if
+// they both have the same conditionals. In which case, we cannot print out the
+// alias for that pattern.
+class IAPrinter {
+ AsmWriterInfo &AWI;
+ std::vector<std::string> Conds;
+ std::map<StringRef, unsigned> OpMap;
+ std::string Result;
+ std::string AsmString;
+ std::vector<Record*> ReqFeatures;
+public:
+ IAPrinter(AsmWriterInfo &Info, std::string R, std::string AS)
+ : AWI(Info), Result(R), AsmString(AS) {}
+
+ void addCond(const std::string &C) { Conds.push_back(C); }
+ void addReqFeatures(const std::vector<Record*> &Features) {
+ AWI.addReqFeatures(Features);
+ ReqFeatures = Features;
+ }
+
+ void addOperand(StringRef Op, unsigned Idx) { OpMap[Op] = Idx; }
+ unsigned getOpIndex(StringRef Op) { return OpMap[Op]; }
+ bool isOpMapped(StringRef Op) { return OpMap.find(Op) != OpMap.end(); }
+
+ bool print(raw_ostream &O) {
+ if (Conds.empty() && ReqFeatures.empty()) {
+ O.indent(6) << "return true;\n";
+ return false;
+ }
+
+ O << "if (";
+
+ for (std::vector<std::string>::iterator
+ I = Conds.begin(), E = Conds.end(); I != E; ++I) {
+ if (I != Conds.begin()) {
+ O << " &&\n";
+ O.indent(8);
+ }
+
+ O << *I;
+ }
+
+ if (!ReqFeatures.empty()) {
+ if (Conds.begin() != Conds.end()) {
+ O << " &&\n";
+ O.indent(8);
+ } else {
+ O << "if (";
+ }
+
+ std::string Req;
+ raw_string_ostream ReqO(Req);
+
+ for (std::vector<Record*>::iterator
+ I = ReqFeatures.begin(), E = ReqFeatures.end(); I != E; ++I) {
+ if (I != ReqFeatures.begin()) ReqO << " | ";
+ ReqO << AWI.getFeatureInfo(*I)->getEnumName();
+ }
+
+ O << "(AvailableFeatures & (" << ReqO.str() << ")) == ("
+ << ReqO.str() << ')';
+ }
+
+ O << ") {\n";
+ O.indent(6) << "// " << Result << "\n";
+ O.indent(6) << "AsmString = \"" << AsmString << "\";\n";
+
+ for (std::map<StringRef, unsigned>::iterator
+ I = OpMap.begin(), E = OpMap.end(); I != E; ++I)
+ O.indent(6) << "OpMap[\"" << I->first << "\"] = "
+ << I->second << ";\n";
+
+ O.indent(6) << "break;\n";
+ O.indent(4) << '}';
+ return !ReqFeatures.empty();
+ }
+
+ bool operator==(const IAPrinter &RHS) {
+ if (Conds.size() != RHS.Conds.size())
+ return false;
+
+ unsigned Idx = 0;
+ for (std::vector<std::string>::iterator
+ I = Conds.begin(), E = Conds.end(); I != E; ++I)
+ if (*I != RHS.Conds[Idx++])
+ return false;
+
+ return true;
+ }
+
+ bool operator()(const IAPrinter &RHS) {
+ if (Conds.size() < RHS.Conds.size())
+ return true;
+
+ unsigned Idx = 0;
+ for (std::vector<std::string>::iterator
+ I = Conds.begin(), E = Conds.end(); I != E; ++I)
+ if (*I != RHS.Conds[Idx++])
+ return *I < RHS.Conds[Idx++];
+
+ return false;
+ }
+};
+
} // end anonymous namespace
/// EmitSubtargetFeatureFlagEnumeration - Emit the subtarget feature flag
O << " Feature_None = 0\n";
O << "};\n\n";
- O << "} // end anonymous namespace\n";
+ O << "} // end anonymous namespace\n\n";
}
/// EmitComputeAvailableFeatures - Emit the function to compute the list of
bool isMC = AsmWriter->getValueAsBit("isMCAsmWriter");
const char *MachineInstrClassName = isMC ? "MCInst" : "MachineInstr";
- O << "bool " << Target.getName() << ClassName
- << "::printAliasInstr(const " << MachineInstrClassName
- << " *MI, raw_ostream &OS) {\n";
-
std::vector<Record*> AllInstAliases =
Records.getAllDerivedDefinitions("InstAlias");
I = AllInstAliases.begin(), E = AllInstAliases.end(); I != E; ++I) {
CodeGenInstAlias *Alias = new CodeGenInstAlias(*I, Target);
const Record *R = *I;
+ if (!R->getValueAsBit("EmitAlias"))
+ continue; // We were told not to emit the alias, but to emit the aliasee.
const DagInit *DI = R->getValueAsDag("ResultInst");
const DefInit *Op = dynamic_cast<const DefInit*>(DI->getOperator());
AliasMap[getQualifiedName(Op->getDef())].push_back(Alias);
}
- if (AliasMap.empty() || !isMC) {
- // FIXME: Support MachineInstr InstAliases?
- O << " return true;\n";
- O << "}\n\n";
- O << "#endif // PRINT_ALIAS_INSTR\n";
- return;
- }
-
- O << " StringRef AsmString;\n";
- O << " std::map<StringRef, unsigned> OpMap;\n";
- O << " switch (MI->getOpcode()) {\n";
- O << " default: return true;\n";
+ // A map of which conditions need to be met for each instruction operand
+ // before it can be matched to the mnemonic.
+ std::map<std::string, std::vector<IAPrinter*> > IAPrinterMap;
+ AsmWriterInfo AWI;
for (std::map<std::string, std::vector<CodeGenInstAlias*> >::iterator
I = AliasMap.begin(), E = AliasMap.end(); I != E; ++I) {
std::vector<CodeGenInstAlias*> &Aliases = I->second;
- std::map<std::string, unsigned> CondCount;
- std::map<std::string, std::string> BodyMap;
-
- std::string AsmString = "";
-
for (std::vector<CodeGenInstAlias*>::iterator
II = Aliases.begin(), IE = Aliases.end(); II != IE; ++II) {
const CodeGenInstAlias *CGA = *II;
- AsmString = CGA->AsmString;
- unsigned Indent = 8;
+ IAPrinter *IAP = new IAPrinter(AWI, CGA->Result->getAsString(),
+ CGA->AsmString);
+
+ IAP->addReqFeatures(CGA->TheDef->getValueAsListOfDefs("Predicates"));
+
unsigned LastOpNo = CGA->ResultInstOperandIndex.size();
std::string Cond;
- raw_string_ostream CondO(Cond);
-
- CondO << "if (MI->getNumOperands() == " << LastOpNo;
+ Cond = std::string("MI->getNumOperands() == ") + llvm::utostr(LastOpNo);
+ IAP->addCond(Cond);
std::map<StringRef, unsigned> OpMap;
bool CantHandle = false;
StringRef ROName = RO.getName();
if (Rec->isSubClassOf("RegisterClass")) {
- CondO << " &&\n";
- CondO.indent(Indent) << "MI->getOperand(" << i << ").isReg() &&\n";
- if (OpMap.find(ROName) == OpMap.end()) {
- OpMap[ROName] = i;
- CondO.indent(Indent)
- << "regIsInRegisterClass(RC_"
- << CGA->ResultOperands[i].getRecord()->getName()
- << ", MI->getOperand(" << i << ").getReg())";
+ Cond = std::string("MI->getOperand(")+llvm::utostr(i)+").isReg()";
+ IAP->addCond(Cond);
+
+ if (!IAP->isOpMapped(ROName)) {
+ IAP->addOperand(ROName, i);
+ Cond = std::string("regIsInRegisterClass(RC_") +
+ CGA->ResultOperands[i].getRecord()->getName() +
+ ", MI->getOperand(" + llvm::utostr(i) + ").getReg())";
+ IAP->addCond(Cond);
} else {
- CondO.indent(Indent)
- << "MI->getOperand(" << i
- << ").getReg() == MI->getOperand("
- << OpMap[ROName] << ").getReg()";
+ Cond = std::string("MI->getOperand(") +
+ llvm::utostr(i) + ").getReg() == MI->getOperand(" +
+ llvm::utostr(IAP->getOpIndex(ROName)) + ").getReg()";
+ IAP->addCond(Cond);
}
} else {
assert(Rec->isSubClassOf("Operand") && "Unexpected operand!");
// FIXME: We need to handle these situations.
+ delete IAP;
+ IAP = 0;
CantHandle = true;
break;
}
break;
}
case CodeGenInstAlias::ResultOperand::K_Imm:
- CondO << " &&\n";
- CondO.indent(Indent) << "MI->getOperand(" << i << ").getImm() == ";
- CondO << CGA->ResultOperands[i].getImm();
+ Cond = std::string("MI->getOperand(") +
+ llvm::utostr(i) + ").getImm() == " +
+ llvm::utostr(CGA->ResultOperands[i].getImm());
+ IAP->addCond(Cond);
break;
case CodeGenInstAlias::ResultOperand::K_Reg:
- CondO << " &&\n";
- CondO.indent(Indent) << "MI->getOperand(" << i << ").getReg() == ";
- CondO << Target.getName() << "::"
- << CGA->ResultOperands[i].getRegister()->getName();
+ Cond = std::string("MI->getOperand(") +
+ llvm::utostr(i) + ").getReg() == " + Target.getName() +
+ "::" + CGA->ResultOperands[i].getRegister()->getName();
+ IAP->addCond(Cond);
break;
}
- if (CantHandle) break;
+ if (!IAP) break;
}
if (CantHandle) continue;
+ IAPrinterMap[I->first].push_back(IAP);
+ }
+ }
- CondO << ")";
-
- std::string Body;
- raw_string_ostream BodyO(Body);
+ EmitSubtargetFeatureFlagEnumeration(AWI, O);
+ EmitComputeAvailableFeatures(AWI, AsmWriter, Target, O);
- BodyO << " // " << CGA->Result->getAsString() << "\n";
- BodyO << " AsmString = \"" << AsmString << "\";\n";
+ O << "bool " << Target.getName() << ClassName
+ << "::printAliasInstr(const " << MachineInstrClassName
+ << " *MI, raw_ostream &OS) {\n";
- for (std::map<StringRef, unsigned>::iterator
- III = OpMap.begin(), IIE = OpMap.end(); III != IIE; ++III)
- BodyO << " OpMap[\"" << III->first << "\"] = "
- << III->second << ";\n";
+ std::string Cases;
+ raw_string_ostream CasesO(Cases);
+ bool NeedAvailableFeatures = false;
+
+ for (std::map<std::string, std::vector<IAPrinter*> >::iterator
+ I = IAPrinterMap.begin(), E = IAPrinterMap.end(); I != E; ++I) {
+ std::vector<IAPrinter*> &IAPs = I->second;
+ std::vector<IAPrinter*> UniqueIAPs;
+
+ for (std::vector<IAPrinter*>::iterator
+ II = IAPs.begin(), IE = IAPs.end(); II != IE; ++II) {
+ IAPrinter *LHS = *II;
+ bool IsDup = false;
+ for (std::vector<IAPrinter*>::iterator
+ III = IAPs.begin(), IIE = IAPs.end(); III != IIE; ++III) {
+ IAPrinter *RHS = *III;
+ if (LHS != RHS && *LHS == *RHS) {
+ IsDup = true;
+ break;
+ }
+ }
- ++CondCount[CondO.str()];
- BodyMap[CondO.str()] = BodyO.str();
+ if (!IsDup) UniqueIAPs.push_back(LHS);
}
- std::string Code;
- raw_string_ostream CodeO(Code);
-
- bool EmitElse = false;
- for (std::map<std::string, unsigned>::iterator
- II = CondCount.begin(), IE = CondCount.end(); II != IE; ++II) {
- if (II->second != 1) continue;
- CodeO << " ";
- if (EmitElse) CodeO << "} else ";
- CodeO << II->first << " {\n";
- CodeO << BodyMap[II->first];
- EmitElse = true;
+ if (UniqueIAPs.empty()) continue;
+
+ CasesO.indent(2) << "case " << I->first << ":\n";
+
+ for (std::vector<IAPrinter*>::iterator
+ II = UniqueIAPs.begin(), IE = UniqueIAPs.end(); II != IE; ++II) {
+ IAPrinter *IAP = *II;
+ CasesO.indent(4);
+ NeedAvailableFeatures |= IAP->print(CasesO);
+ CasesO << '\n';
}
- if (CodeO.str().empty()) continue;
+ CasesO.indent(4) << "return true;\n";
+ }
- O << " case " << I->first << ":\n";
- O << CodeO.str();
- O << " }\n";
- O << " break;\n";
+ if (CasesO.str().empty() || !isMC) {
+ O << " return true;\n";
+ O << "}\n\n";
+ O << "#endif // PRINT_ALIAS_INSTR\n";
+ return;
}
- O << " }\n\n";
+ O.indent(2) << "StringRef AsmString;\n";
+ O.indent(2) << "std::map<StringRef, unsigned> OpMap;\n";
+ if (NeedAvailableFeatures)
+ O.indent(2) << "unsigned AvailableFeatures = getAvailableFeatures();\n\n";
+ O.indent(2) << "switch (MI->getOpcode()) {\n";
+ O.indent(2) << "default: return true;\n";
+ O << CasesO.str();
+ O.indent(2) << "}\n\n";
// Code that prints the alias, replacing the operands with the ones from the
// MCInst.
- O << " if (AsmString.empty()) return true;\n";
O << " std::pair<StringRef, StringRef> ASM = AsmString.split(' ');\n";
O << " OS << '\\t' << ASM.first;\n";
projects / oota-llvm.git / blobdiff