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//===--------------------- PredicateExpander.cpp --------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
/// \file
/// Functionalities used by the Tablegen backends to expand machine predicates.
//
//===----------------------------------------------------------------------===//
#include "PredicateExpander.h"
namespace llvm {
void PredicateExpander::expandTrue(formatted_raw_ostream &OS) { OS << "true"; }
void PredicateExpander::expandFalse(formatted_raw_ostream &OS) {
OS << "false";
}
void PredicateExpander::expandCheckImmOperand(formatted_raw_ostream &OS,
int OpIndex, int ImmVal) {
OS << "MI" << (isByRef() ? "." : "->") << "getOperand(" << OpIndex
<< ").getImm() " << (shouldNegate() ? "!= " : "== ") << ImmVal;
}
void PredicateExpander::expandCheckImmOperand(formatted_raw_ostream &OS,
int OpIndex, StringRef ImmVal) {
OS << "MI" << (isByRef() ? "." : "->") << "getOperand(" << OpIndex
<< ").getImm() " << (shouldNegate() ? "!= " : "== ") << ImmVal;
}
void PredicateExpander::expandCheckRegOperand(formatted_raw_ostream &OS,
int OpIndex, const Record *Reg) {
assert(Reg->isSubClassOf("Register") && "Expected a register Record!");
OS << "MI" << (isByRef() ? "." : "->") << "getOperand(" << OpIndex
<< ").getReg() " << (shouldNegate() ? "!= " : "== ");
const StringRef Str = Reg->getValueAsString("Namespace");
if (!Str.empty())
OS << Str << "::";
OS << Reg->getName();
}
void PredicateExpander::expandCheckInvalidRegOperand(formatted_raw_ostream &OS,
int OpIndex) {
OS << "MI" << (isByRef() ? "." : "->") << "getOperand(" << OpIndex
<< ").getReg() " << (shouldNegate() ? "!= " : "== ") << "0";
}
void PredicateExpander::expandCheckSameRegOperand(formatted_raw_ostream &OS,
int First, int Second) {
OS << "MI" << (isByRef() ? "." : "->") << "getOperand(" << First
<< ").getReg() " << (shouldNegate() ? "!=" : "==") << " MI"
<< (isByRef() ? "." : "->") << "getOperand(" << Second << ").getReg()";
}
void PredicateExpander::expandCheckNumOperands(formatted_raw_ostream &OS,
int NumOps) {
OS << "MI" << (isByRef() ? "." : "->") << "getNumOperands() "
<< (shouldNegate() ? "!= " : "== ") << NumOps;
}
void PredicateExpander::expandCheckOpcode(formatted_raw_ostream &OS,
const Record *Inst) {
OS << "MI" << (isByRef() ? "." : "->") << "getOpcode() "
<< (shouldNegate() ? "!= " : "== ") << Inst->getValueAsString("Namespace")
<< "::" << Inst->getName();
}
void PredicateExpander::expandCheckOpcode(formatted_raw_ostream &OS,
const RecVec &Opcodes) {
assert(!Opcodes.empty() && "Expected at least one opcode to check!");
bool First = true;
if (Opcodes.size() == 1) {
OS << "( ";
expandCheckOpcode(OS, Opcodes[0]);
OS << " )";
return;
}
OS << '(';
increaseIndentLevel();
for (const Record *Rec : Opcodes) {
OS << '\n';
OS.PadToColumn(getIndentLevel() * 2);
if (!First)
OS << (shouldNegate() ? "&& " : "|| ");
expandCheckOpcode(OS, Rec);
First = false;
}
OS << '\n';
decreaseIndentLevel();
OS.PadToColumn(getIndentLevel() * 2);
OS << ')';
}
void PredicateExpander::expandCheckPseudo(formatted_raw_ostream &OS,
const RecVec &Opcodes) {
if (shouldExpandForMC())
expandFalse(OS);
else
expandCheckOpcode(OS, Opcodes);
}
void PredicateExpander::expandPredicateSequence(formatted_raw_ostream &OS,
const RecVec &Sequence,
bool IsCheckAll) {
assert(!Sequence.empty() && "Found an invalid empty predicate set!");
if (Sequence.size() == 1)
return expandPredicate(OS, Sequence[0]);
// Okay, there is more than one predicate in the set.
bool First = true;
OS << (shouldNegate() ? "!(" : "(");
increaseIndentLevel();
bool OldValue = shouldNegate();
setNegatePredicate(false);
for (const Record *Rec : Sequence) {
OS << '\n';
OS.PadToColumn(getIndentLevel() * 2);
if (!First)
OS << (IsCheckAll ? "&& " : "|| ");
expandPredicate(OS, Rec);
First = false;
}
OS << '\n';
decreaseIndentLevel();
OS.PadToColumn(getIndentLevel() * 2);
OS << ')';
setNegatePredicate(OldValue);
}
void PredicateExpander::expandTIIFunctionCall(formatted_raw_ostream &OS,
StringRef TargetName,
StringRef MethodName) {
OS << (shouldNegate() ? "!" : "");
if (shouldExpandForMC())
OS << TargetName << "_MC::";
else
OS << TargetName << "Gen"
<< "InstrInfo::";
OS << MethodName << (isByRef() ? "(MI)" : "(*MI)");
}
void PredicateExpander::expandCheckIsRegOperand(formatted_raw_ostream &OS,
int OpIndex) {
OS << (shouldNegate() ? "!" : "") << "MI" << (isByRef() ? "." : "->")
<< "getOperand(" << OpIndex << ").isReg() ";
}
void PredicateExpander::expandCheckIsImmOperand(formatted_raw_ostream &OS,
int OpIndex) {
OS << (shouldNegate() ? "!" : "") << "MI" << (isByRef() ? "." : "->")
<< "getOperand(" << OpIndex << ").isImm() ";
}
void PredicateExpander::expandCheckFunctionPredicate(formatted_raw_ostream &OS,
StringRef MCInstFn,
StringRef MachineInstrFn) {
OS << (shouldExpandForMC() ? MCInstFn : MachineInstrFn)
<< (isByRef() ? "(MI)" : "(*MI)");
}
void PredicateExpander::expandCheckNonPortable(formatted_raw_ostream &OS,
StringRef Code) {
if (shouldExpandForMC())
return expandFalse(OS);
OS << '(' << Code << ')';
}
void PredicateExpander::expandPredicate(formatted_raw_ostream &OS,
const Record *Rec) {
OS.flush();
unsigned ColNum = getIndentLevel() * 2;
if (OS.getColumn() < ColNum)
OS.PadToColumn(ColNum);
if (Rec->isSubClassOf("MCTrue")) {
if (shouldNegate())
return expandFalse(OS);
return expandTrue(OS);
}
if (Rec->isSubClassOf("MCFalse")) {
if (shouldNegate())
return expandTrue(OS);
return expandFalse(OS);
}
if (Rec->isSubClassOf("CheckNot")) {
flipNegatePredicate();
expandPredicate(OS, Rec->getValueAsDef("Pred"));
flipNegatePredicate();
return;
}
if (Rec->isSubClassOf("CheckIsRegOperand"))
return expandCheckIsRegOperand(OS, Rec->getValueAsInt("OpIndex"));
if (Rec->isSubClassOf("CheckIsImmOperand"))
return expandCheckIsImmOperand(OS, Rec->getValueAsInt("OpIndex"));
if (Rec->isSubClassOf("CheckRegOperand"))
return expandCheckRegOperand(OS, Rec->getValueAsInt("OpIndex"),
Rec->getValueAsDef("Reg"));
if (Rec->isSubClassOf("CheckInvalidRegOperand"))
return expandCheckInvalidRegOperand(OS, Rec->getValueAsInt("OpIndex"));
if (Rec->isSubClassOf("CheckImmOperand"))
return expandCheckImmOperand(OS, Rec->getValueAsInt("OpIndex"),
Rec->getValueAsInt("ImmVal"));
if (Rec->isSubClassOf("CheckImmOperand_s"))
return expandCheckImmOperand(OS, Rec->getValueAsInt("OpIndex"),
Rec->getValueAsString("ImmVal"));
if (Rec->isSubClassOf("CheckSameRegOperand"))
return expandCheckSameRegOperand(OS, Rec->getValueAsInt("FirstIndex"),
Rec->getValueAsInt("SecondIndex"));
if (Rec->isSubClassOf("CheckNumOperands"))
return expandCheckNumOperands(OS, Rec->getValueAsInt("NumOps"));
if (Rec->isSubClassOf("CheckPseudo"))
return expandCheckPseudo(OS, Rec->getValueAsListOfDefs("ValidOpcodes"));
if (Rec->isSubClassOf("CheckOpcode"))
return expandCheckOpcode(OS, Rec->getValueAsListOfDefs("ValidOpcodes"));
if (Rec->isSubClassOf("CheckAll"))
return expandPredicateSequence(OS, Rec->getValueAsListOfDefs("Predicates"),
/* AllOf */ true);
if (Rec->isSubClassOf("CheckAny"))
return expandPredicateSequence(OS, Rec->getValueAsListOfDefs("Predicates"),
/* AllOf */ false);
if (Rec->isSubClassOf("CheckFunctionPredicate"))
return expandCheckFunctionPredicate(
OS, Rec->getValueAsString("MCInstFnName"),
Rec->getValueAsString("MachineInstrFnName"));
if (Rec->isSubClassOf("CheckNonPortable"))
return expandCheckNonPortable(OS, Rec->getValueAsString("CodeBlock"));
if (Rec->isSubClassOf("TIIPredicate"))
return expandTIIFunctionCall(OS, Rec->getValueAsString("TargetName"),
Rec->getValueAsString("FunctionName"));
llvm_unreachable("No known rules to expand this MCInstPredicate");
}
} // namespace llvm
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