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llvm-project/llvm/lib/CodeGen/MIRParser/MIParser.cpp

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//===- MIParser.cpp - Machine instructions parser implementation ----------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file implements the parsing of machine instructions.
//
//===----------------------------------------------------------------------===//
#include "MIParser.h"
#include "MILexer.h"
#include "llvm/ADT/StringMap.h"
#include "llvm/AsmParser/Parser.h"
#include "llvm/AsmParser/SlotMapping.h"
#include "llvm/CodeGen/MachineBasicBlock.h"
#include "llvm/CodeGen/MachineFrameInfo.h"
#include "llvm/CodeGen/MachineFunction.h"
#include "llvm/CodeGen/MachineInstr.h"
#include "llvm/CodeGen/MachineInstrBuilder.h"
#include "llvm/CodeGen/MachineMemOperand.h"
#include "llvm/CodeGen/MachineModuleInfo.h"
#include "llvm/CodeGen/MachineRegisterInfo.h"
#include "llvm/IR/Constants.h"
#include "llvm/IR/Instructions.h"
#include "llvm/IR/Module.h"
#include "llvm/IR/ModuleSlotTracker.h"
#include "llvm/IR/ValueSymbolTable.h"
#include "llvm/Support/SourceMgr.h"
#include "llvm/Support/raw_ostream.h"
#include "llvm/Target/TargetInstrInfo.h"
#include "llvm/Target/TargetSubtargetInfo.h"
using namespace llvm;
namespace {
/// A wrapper struct around the 'MachineOperand' struct that includes a source
/// range and other attributes.
struct ParsedMachineOperand {
MachineOperand Operand;
StringRef::iterator Begin;
StringRef::iterator End;
Optional<unsigned> TiedDefIdx;
ParsedMachineOperand(const MachineOperand &Operand, StringRef::iterator Begin,
StringRef::iterator End, Optional<unsigned> &TiedDefIdx)
: Operand(Operand), Begin(Begin), End(End), TiedDefIdx(TiedDefIdx) {
if (TiedDefIdx)
assert(Operand.isReg() && Operand.isUse() &&
"Only used register operands can be tied");
}
};
class MIParser {
SourceMgr &SM;
MachineFunction &MF;
SMDiagnostic &Error;
StringRef Source, CurrentSource;
MIToken Token;
const PerFunctionMIParsingState &PFS;
/// Maps from indices to unnamed global values and metadata nodes.
const SlotMapping &IRSlots;
/// Maps from instruction names to op codes.
StringMap<unsigned> Names2InstrOpCodes;
/// Maps from register names to registers.
StringMap<unsigned> Names2Regs;
/// Maps from register mask names to register masks.
StringMap<const uint32_t *> Names2RegMasks;
/// Maps from subregister names to subregister indices.
StringMap<unsigned> Names2SubRegIndices;
/// Maps from slot numbers to function's unnamed basic blocks.
DenseMap<unsigned, const BasicBlock *> Slots2BasicBlocks;
/// Maps from slot numbers to function's unnamed values.
DenseMap<unsigned, const Value *> Slots2Values;
/// Maps from target index names to target indices.
StringMap<int> Names2TargetIndices;
/// Maps from direct target flag names to the direct target flag values.
StringMap<unsigned> Names2DirectTargetFlags;
/// Maps from direct target flag names to the bitmask target flag values.
StringMap<unsigned> Names2BitmaskTargetFlags;
public:
MIParser(SourceMgr &SM, MachineFunction &MF, SMDiagnostic &Error,
StringRef Source, const PerFunctionMIParsingState &PFS,
const SlotMapping &IRSlots);
/// \p SkipChar gives the number of characters to skip before looking
/// for the next token.
void lex(unsigned SkipChar = 0);
/// Report an error at the current location with the given message.
///
/// This function always return true.
bool error(const Twine &Msg);
/// Report an error at the given location with the given message.
///
/// This function always return true.
bool error(StringRef::iterator Loc, const Twine &Msg);
bool
parseBasicBlockDefinitions(DenseMap<unsigned, MachineBasicBlock *> &MBBSlots);
bool parseBasicBlocks();
bool parse(MachineInstr *&MI);
bool parseStandaloneMBB(MachineBasicBlock *&MBB);
bool parseStandaloneNamedRegister(unsigned &Reg);
bool parseStandaloneVirtualRegister(unsigned &Reg);
bool parseStandaloneStackObject(int &FI);
bool parseStandaloneMDNode(MDNode *&Node);
bool
parseBasicBlockDefinition(DenseMap<unsigned, MachineBasicBlock *> &MBBSlots);
bool parseBasicBlock(MachineBasicBlock &MBB);
bool parseBasicBlockLiveins(MachineBasicBlock &MBB);
bool parseBasicBlockSuccessors(MachineBasicBlock &MBB);
bool parseRegister(unsigned &Reg);
bool parseRegisterFlag(unsigned &Flags);
bool parseSubRegisterIndex(unsigned &SubReg);
bool parseRegisterTiedDefIndex(unsigned &TiedDefIdx);
bool parseSize(unsigned &Size);
bool parseRegisterOperand(MachineOperand &Dest,
Optional<unsigned> &TiedDefIdx, bool IsDef = false);
bool parseImmediateOperand(MachineOperand &Dest);
bool parseIRConstant(StringRef::iterator Loc, StringRef Source,
const Constant *&C);
bool parseIRConstant(StringRef::iterator Loc, const Constant *&C);
bool parseIRType(StringRef::iterator Loc, StringRef Source, unsigned &Read,
Type *&Ty);
// \p MustBeSized defines whether or not \p Ty must be sized.
bool parseIRType(StringRef::iterator Loc, Type *&Ty, bool MustBeSized = true);
bool parseTypedImmediateOperand(MachineOperand &Dest);
bool parseFPImmediateOperand(MachineOperand &Dest);
bool parseMBBReference(MachineBasicBlock *&MBB);
bool parseMBBOperand(MachineOperand &Dest);
bool parseStackFrameIndex(int &FI);
bool parseStackObjectOperand(MachineOperand &Dest);
bool parseFixedStackFrameIndex(int &FI);
bool parseFixedStackObjectOperand(MachineOperand &Dest);
bool parseGlobalValue(GlobalValue *&GV);
bool parseGlobalAddressOperand(MachineOperand &Dest);
bool parseConstantPoolIndexOperand(MachineOperand &Dest);
bool parseSubRegisterIndexOperand(MachineOperand &Dest);
bool parseJumpTableIndexOperand(MachineOperand &Dest);
bool parseExternalSymbolOperand(MachineOperand &Dest);
bool parseMDNode(MDNode *&Node);
bool parseMetadataOperand(MachineOperand &Dest);
bool parseCFIOffset(int &Offset);
bool parseCFIRegister(unsigned &Reg);
bool parseCFIOperand(MachineOperand &Dest);
bool parseIRBlock(BasicBlock *&BB, const Function &F);
bool parseBlockAddressOperand(MachineOperand &Dest);
bool parseTargetIndexOperand(MachineOperand &Dest);
bool parseLiveoutRegisterMaskOperand(MachineOperand &Dest);
bool parseMachineOperand(MachineOperand &Dest,
Optional<unsigned> &TiedDefIdx);
bool parseMachineOperandAndTargetFlags(MachineOperand &Dest,
Optional<unsigned> &TiedDefIdx);
bool parseOffset(int64_t &Offset);
bool parseAlignment(unsigned &Alignment);
bool parseOperandsOffset(MachineOperand &Op);
bool parseIRValue(const Value *&V);
bool parseMemoryOperandFlag(unsigned &Flags);
bool parseMemoryPseudoSourceValue(const PseudoSourceValue *&PSV);
bool parseMachinePointerInfo(MachinePointerInfo &Dest);
bool parseMachineMemoryOperand(MachineMemOperand *&Dest);
private:
/// Convert the integer literal in the current token into an unsigned integer.
///
/// Return true if an error occurred.
bool getUnsigned(unsigned &Result);
/// Convert the integer literal in the current token into an uint64.
///
/// Return true if an error occurred.
bool getUint64(uint64_t &Result);
/// If the current token is of the given kind, consume it and return false.
/// Otherwise report an error and return true.
bool expectAndConsume(MIToken::TokenKind TokenKind);
/// If the current token is of the given kind, consume it and return true.
/// Otherwise return false.
bool consumeIfPresent(MIToken::TokenKind TokenKind);
void initNames2InstrOpCodes();
/// Try to convert an instruction name to an opcode. Return true if the
/// instruction name is invalid.
bool parseInstrName(StringRef InstrName, unsigned &OpCode);
bool parseInstruction(unsigned &OpCode, unsigned &Flags);
bool assignRegisterTies(MachineInstr &MI,
ArrayRef<ParsedMachineOperand> Operands);
bool verifyImplicitOperands(ArrayRef<ParsedMachineOperand> Operands,
const MCInstrDesc &MCID);
void initNames2Regs();
/// Try to convert a register name to a register number. Return true if the
/// register name is invalid.
bool getRegisterByName(StringRef RegName, unsigned &Reg);
void initNames2RegMasks();
/// Check if the given identifier is a name of a register mask.
///
/// Return null if the identifier isn't a register mask.
const uint32_t *getRegMask(StringRef Identifier);
void initNames2SubRegIndices();
/// Check if the given identifier is a name of a subregister index.
///
/// Return 0 if the name isn't a subregister index class.
unsigned getSubRegIndex(StringRef Name);
const BasicBlock *getIRBlock(unsigned Slot);
const BasicBlock *getIRBlock(unsigned Slot, const Function &F);
const Value *getIRValue(unsigned Slot);
void initNames2TargetIndices();
/// Try to convert a name of target index to the corresponding target index.
///
/// Return true if the name isn't a name of a target index.
bool getTargetIndex(StringRef Name, int &Index);
void initNames2DirectTargetFlags();
/// Try to convert a name of a direct target flag to the corresponding
/// target flag.
///
/// Return true if the name isn't a name of a direct flag.
bool getDirectTargetFlag(StringRef Name, unsigned &Flag);
void initNames2BitmaskTargetFlags();
/// Try to convert a name of a bitmask target flag to the corresponding
/// target flag.
///
/// Return true if the name isn't a name of a bitmask target flag.
bool getBitmaskTargetFlag(StringRef Name, unsigned &Flag);
};
} // end anonymous namespace
MIParser::MIParser(SourceMgr &SM, MachineFunction &MF, SMDiagnostic &Error,
StringRef Source, const PerFunctionMIParsingState &PFS,
const SlotMapping &IRSlots)
: SM(SM), MF(MF), Error(Error), Source(Source), CurrentSource(Source),
PFS(PFS), IRSlots(IRSlots) {}
void MIParser::lex(unsigned SkipChar) {
CurrentSource = lexMIToken(
CurrentSource.data() + SkipChar, Token,
[this](StringRef::iterator Loc, const Twine &Msg) { error(Loc, Msg); });
}
bool MIParser::error(const Twine &Msg) { return error(Token.location(), Msg); }
bool MIParser::error(StringRef::iterator Loc, const Twine &Msg) {
assert(Loc >= Source.data() && Loc <= (Source.data() + Source.size()));
const MemoryBuffer &Buffer = *SM.getMemoryBuffer(SM.getMainFileID());
if (Loc >= Buffer.getBufferStart() && Loc <= Buffer.getBufferEnd()) {
// Create an ordinary diagnostic when the source manager's buffer is the
// source string.
Error = SM.GetMessage(SMLoc::getFromPointer(Loc), SourceMgr::DK_Error, Msg);
return true;
}
// Create a diagnostic for a YAML string literal.
Error = SMDiagnostic(SM, SMLoc(), Buffer.getBufferIdentifier(), 1,
Loc - Source.data(), SourceMgr::DK_Error, Msg.str(),
Source, None, None);
return true;
}
static const char *toString(MIToken::TokenKind TokenKind) {
switch (TokenKind) {
case MIToken::comma:
return "','";
case MIToken::equal:
return "'='";
case MIToken::colon:
return "':'";
case MIToken::lparen:
return "'('";
case MIToken::rparen:
return "')'";
default:
return "<unknown token>";
}
}
bool MIParser::expectAndConsume(MIToken::TokenKind TokenKind) {
if (Token.isNot(TokenKind))
return error(Twine("expected ") + toString(TokenKind));
lex();
return false;
}
bool MIParser::consumeIfPresent(MIToken::TokenKind TokenKind) {
if (Token.isNot(TokenKind))
return false;
lex();
return true;
}
bool MIParser::parseBasicBlockDefinition(
DenseMap<unsigned, MachineBasicBlock *> &MBBSlots) {
assert(Token.is(MIToken::MachineBasicBlockLabel));
unsigned ID = 0;
if (getUnsigned(ID))
return true;
auto Loc = Token.location();
auto Name = Token.stringValue();
lex();
bool HasAddressTaken = false;
bool IsLandingPad = false;
unsigned Alignment = 0;
BasicBlock *BB = nullptr;
if (consumeIfPresent(MIToken::lparen)) {
do {
// TODO: Report an error when multiple same attributes are specified.
switch (Token.kind()) {
case MIToken::kw_address_taken:
HasAddressTaken = true;
lex();
break;
case MIToken::kw_landing_pad:
IsLandingPad = true;
lex();
break;
case MIToken::kw_align:
if (parseAlignment(Alignment))
return true;
break;
case MIToken::IRBlock:
// TODO: Report an error when both name and ir block are specified.
if (parseIRBlock(BB, *MF.getFunction()))
return true;
lex();
break;
default:
break;
}
} while (consumeIfPresent(MIToken::comma));
if (expectAndConsume(MIToken::rparen))
return true;
}
if (expectAndConsume(MIToken::colon))
return true;
if (!Name.empty()) {
BB = dyn_cast_or_null<BasicBlock>(
MF.getFunction()->getValueSymbolTable().lookup(Name));
if (!BB)
return error(Loc, Twine("basic block '") + Name +
"' is not defined in the function '" +
MF.getName() + "'");
}
auto *MBB = MF.CreateMachineBasicBlock(BB);
MF.insert(MF.end(), MBB);
bool WasInserted = MBBSlots.insert(std::make_pair(ID, MBB)).second;
if (!WasInserted)
return error(Loc, Twine("redefinition of machine basic block with id #") +
Twine(ID));
if (Alignment)
MBB->setAlignment(Alignment);
if (HasAddressTaken)
MBB->setHasAddressTaken();
MBB->setIsEHPad(IsLandingPad);
return false;
}
bool MIParser::parseBasicBlockDefinitions(
DenseMap<unsigned, MachineBasicBlock *> &MBBSlots) {
lex();
// Skip until the first machine basic block.
while (Token.is(MIToken::Newline))
lex();
if (Token.isErrorOrEOF())
return Token.isError();
if (Token.isNot(MIToken::MachineBasicBlockLabel))
return error("expected a basic block definition before instructions");
unsigned BraceDepth = 0;
do {
if (parseBasicBlockDefinition(MBBSlots))
return true;
bool IsAfterNewline = false;
// Skip until the next machine basic block.
while (true) {
if ((Token.is(MIToken::MachineBasicBlockLabel) && IsAfterNewline) ||
Token.isErrorOrEOF())
break;
else if (Token.is(MIToken::MachineBasicBlockLabel))
return error("basic block definition should be located at the start of "
"the line");
else if (consumeIfPresent(MIToken::Newline)) {
IsAfterNewline = true;
continue;
}
IsAfterNewline = false;
if (Token.is(MIToken::lbrace))
++BraceDepth;
if (Token.is(MIToken::rbrace)) {
if (!BraceDepth)
return error("extraneous closing brace ('}')");
--BraceDepth;
}
lex();
}
// Verify that we closed all of the '{' at the end of a file or a block.
if (!Token.isError() && BraceDepth)
return error("expected '}'"); // FIXME: Report a note that shows '{'.
} while (!Token.isErrorOrEOF());
return Token.isError();
}
bool MIParser::parseBasicBlockLiveins(MachineBasicBlock &MBB) {
assert(Token.is(MIToken::kw_liveins));
lex();
if (expectAndConsume(MIToken::colon))
return true;
if (Token.isNewlineOrEOF()) // Allow an empty list of liveins.
return false;
do {
if (Token.isNot(MIToken::NamedRegister))
return error("expected a named register");
unsigned Reg = 0;
if (parseRegister(Reg))
return true;
MBB.addLiveIn(Reg);
lex();
} while (consumeIfPresent(MIToken::comma));
return false;
}
bool MIParser::parseBasicBlockSuccessors(MachineBasicBlock &MBB) {
assert(Token.is(MIToken::kw_successors));
lex();
if (expectAndConsume(MIToken::colon))
return true;
if (Token.isNewlineOrEOF()) // Allow an empty list of successors.
return false;
do {
if (Token.isNot(MIToken::MachineBasicBlock))
return error("expected a machine basic block reference");
MachineBasicBlock *SuccMBB = nullptr;
if (parseMBBReference(SuccMBB))
return true;
lex();
unsigned Weight = 0;
if (consumeIfPresent(MIToken::lparen)) {
if (Token.isNot(MIToken::IntegerLiteral))
return error("expected an integer literal after '('");
if (getUnsigned(Weight))
return true;
lex();
if (expectAndConsume(MIToken::rparen))
return true;
}
MBB.addSuccessor(SuccMBB, BranchProbability::getRaw(Weight));
} while (consumeIfPresent(MIToken::comma));
MBB.normalizeSuccProbs();
return false;
}
bool MIParser::parseBasicBlock(MachineBasicBlock &MBB) {
// Skip the definition.
assert(Token.is(MIToken::MachineBasicBlockLabel));
lex();
if (consumeIfPresent(MIToken::lparen)) {
while (Token.isNot(MIToken::rparen) && !Token.isErrorOrEOF())
lex();
consumeIfPresent(MIToken::rparen);
}
consumeIfPresent(MIToken::colon);
// Parse the liveins and successors.
// N.B: Multiple lists of successors and liveins are allowed and they're
// merged into one.
// Example:
// liveins: %edi
// liveins: %esi
//
// is equivalent to
// liveins: %edi, %esi
while (true) {
if (Token.is(MIToken::kw_successors)) {
if (parseBasicBlockSuccessors(MBB))
return true;
} else if (Token.is(MIToken::kw_liveins)) {
if (parseBasicBlockLiveins(MBB))
return true;
} else if (consumeIfPresent(MIToken::Newline)) {
continue;
} else
break;
if (!Token.isNewlineOrEOF())
return error("expected line break at the end of a list");
lex();
}
// Parse the instructions.
bool IsInBundle = false;
MachineInstr *PrevMI = nullptr;
while (true) {
if (Token.is(MIToken::MachineBasicBlockLabel) || Token.is(MIToken::Eof))
return false;
else if (consumeIfPresent(MIToken::Newline))
continue;
if (consumeIfPresent(MIToken::rbrace)) {
// The first parsing pass should verify that all closing '}' have an
// opening '{'.
assert(IsInBundle);
IsInBundle = false;
continue;
}
MachineInstr *MI = nullptr;
if (parse(MI))
return true;
MBB.insert(MBB.end(), MI);
if (IsInBundle) {
PrevMI->setFlag(MachineInstr::BundledSucc);
MI->setFlag(MachineInstr::BundledPred);
}
PrevMI = MI;
if (Token.is(MIToken::lbrace)) {
if (IsInBundle)
return error("nested instruction bundles are not allowed");
lex();
// This instruction is the start of the bundle.
MI->setFlag(MachineInstr::BundledSucc);
IsInBundle = true;
if (!Token.is(MIToken::Newline))
// The next instruction can be on the same line.
continue;
}
assert(Token.isNewlineOrEOF() && "MI is not fully parsed");
lex();
}
return false;
}
bool MIParser::parseBasicBlocks() {
lex();
// Skip until the first machine basic block.
while (Token.is(MIToken::Newline))
lex();
if (Token.isErrorOrEOF())
return Token.isError();
// The first parsing pass should have verified that this token is a MBB label
// in the 'parseBasicBlockDefinitions' method.
assert(Token.is(MIToken::MachineBasicBlockLabel));
do {
MachineBasicBlock *MBB = nullptr;
if (parseMBBReference(MBB))
return true;
if (parseBasicBlock(*MBB))
return true;
// The method 'parseBasicBlock' should parse the whole block until the next
// block or the end of file.
assert(Token.is(MIToken::MachineBasicBlockLabel) || Token.is(MIToken::Eof));
} while (Token.isNot(MIToken::Eof));
return false;
}
bool MIParser::parse(MachineInstr *&MI) {
// Parse any register operands before '='
MachineOperand MO = MachineOperand::CreateImm(0);
SmallVector<ParsedMachineOperand, 8> Operands;
while (Token.isRegister() || Token.isRegisterFlag()) {
auto Loc = Token.location();
Optional<unsigned> TiedDefIdx;
if (parseRegisterOperand(MO, TiedDefIdx, /*IsDef=*/true))
return true;
Operands.push_back(
ParsedMachineOperand(MO, Loc, Token.location(), TiedDefIdx));
if (Token.isNot(MIToken::comma))
break;
lex();
}
if (!Operands.empty() && expectAndConsume(MIToken::equal))
return true;
unsigned OpCode, Flags = 0;
if (Token.isError() || parseInstruction(OpCode, Flags))
return true;
Type *Ty = nullptr;
if (isPreISelGenericOpcode(OpCode)) {
// For generic opcode, a type is mandatory.
auto Loc = Token.location();
if (parseIRType(Loc, Ty))
return true;
}
// Parse the remaining machine operands.
while (!Token.isNewlineOrEOF() && Token.isNot(MIToken::kw_debug_location) &&
Token.isNot(MIToken::coloncolon) && Token.isNot(MIToken::lbrace)) {
auto Loc = Token.location();
Optional<unsigned> TiedDefIdx;
if (parseMachineOperandAndTargetFlags(MO, TiedDefIdx))
return true;
Operands.push_back(
ParsedMachineOperand(MO, Loc, Token.location(), TiedDefIdx));
if (Token.isNewlineOrEOF() || Token.is(MIToken::coloncolon) ||
Token.is(MIToken::lbrace))
break;
if (Token.isNot(MIToken::comma))
return error("expected ',' before the next machine operand");
lex();
}
DebugLoc DebugLocation;
if (Token.is(MIToken::kw_debug_location)) {
lex();
if (Token.isNot(MIToken::exclaim))
return error("expected a metadata node after 'debug-location'");
MDNode *Node = nullptr;
if (parseMDNode(Node))
return true;
DebugLocation = DebugLoc(Node);
}
// Parse the machine memory operands.
SmallVector<MachineMemOperand *, 2> MemOperands;
if (Token.is(MIToken::coloncolon)) {
lex();
while (!Token.isNewlineOrEOF()) {
MachineMemOperand *MemOp = nullptr;
if (parseMachineMemoryOperand(MemOp))
return true;
MemOperands.push_back(MemOp);
if (Token.isNewlineOrEOF())
break;
if (Token.isNot(MIToken::comma))
return error("expected ',' before the next machine memory operand");
lex();
}
}
const auto &MCID = MF.getSubtarget().getInstrInfo()->get(OpCode);
if (!MCID.isVariadic()) {
// FIXME: Move the implicit operand verification to the machine verifier.
if (verifyImplicitOperands(Operands, MCID))
return true;
}
// TODO: Check for extraneous machine operands.
MI = MF.CreateMachineInstr(MCID, DebugLocation, /*NoImplicit=*/true);
MI->setFlags(Flags);
if (Ty)
MI->setType(Ty);
for (const auto &Operand : Operands)
MI->addOperand(MF, Operand.Operand);
if (assignRegisterTies(*MI, Operands))
return true;
if (MemOperands.empty())
return false;
MachineInstr::mmo_iterator MemRefs =
MF.allocateMemRefsArray(MemOperands.size());
std::copy(MemOperands.begin(), MemOperands.end(), MemRefs);
MI->setMemRefs(MemRefs, MemRefs + MemOperands.size());
return false;
}
bool MIParser::parseStandaloneMBB(MachineBasicBlock *&MBB) {
lex();
if (Token.isNot(MIToken::MachineBasicBlock))
return error("expected a machine basic block reference");
if (parseMBBReference(MBB))
return true;
lex();
if (Token.isNot(MIToken::Eof))
return error(
"expected end of string after the machine basic block reference");
return false;
}
bool MIParser::parseStandaloneNamedRegister(unsigned &Reg) {
lex();
if (Token.isNot(MIToken::NamedRegister))
return error("expected a named register");
if (parseRegister(Reg))
return true;
lex();
if (Token.isNot(MIToken::Eof))
return error("expected end of string after the register reference");
return false;
}
bool MIParser::parseStandaloneVirtualRegister(unsigned &Reg) {
lex();
if (Token.isNot(MIToken::VirtualRegister))
return error("expected a virtual register");
if (parseRegister(Reg))
return true;
lex();
if (Token.isNot(MIToken::Eof))
return error("expected end of string after the register reference");
return false;
}
bool MIParser::parseStandaloneStackObject(int &FI) {
lex();
if (Token.isNot(MIToken::StackObject))
return error("expected a stack object");
if (parseStackFrameIndex(FI))
return true;
if (Token.isNot(MIToken::Eof))
return error("expected end of string after the stack object reference");
return false;
}
bool MIParser::parseStandaloneMDNode(MDNode *&Node) {
lex();
if (Token.isNot(MIToken::exclaim))
return error("expected a metadata node");
if (parseMDNode(Node))
return true;
if (Token.isNot(MIToken::Eof))
return error("expected end of string after the metadata node");
return false;
}
static const char *printImplicitRegisterFlag(const MachineOperand &MO) {
assert(MO.isImplicit());
return MO.isDef() ? "implicit-def" : "implicit";
}
static std::string getRegisterName(const TargetRegisterInfo *TRI,
unsigned Reg) {
assert(TargetRegisterInfo::isPhysicalRegister(Reg) && "expected phys reg");
return StringRef(TRI->getName(Reg)).lower();
}
/// Return true if the parsed machine operands contain a given machine operand.
static bool isImplicitOperandIn(const MachineOperand &ImplicitOperand,
ArrayRef<ParsedMachineOperand> Operands) {
for (const auto &I : Operands) {
if (ImplicitOperand.isIdenticalTo(I.Operand))
return true;
}
return false;
}
bool MIParser::verifyImplicitOperands(ArrayRef<ParsedMachineOperand> Operands,
const MCInstrDesc &MCID) {
if (MCID.isCall())
// We can't verify call instructions as they can contain arbitrary implicit
// register and register mask operands.
return false;
// Gather all the expected implicit operands.
SmallVector<MachineOperand, 4> ImplicitOperands;
if (MCID.ImplicitDefs)
for (const MCPhysReg *ImpDefs = MCID.getImplicitDefs(); *ImpDefs; ++ImpDefs)
ImplicitOperands.push_back(
MachineOperand::CreateReg(*ImpDefs, true, true));
if (MCID.ImplicitUses)
for (const MCPhysReg *ImpUses = MCID.getImplicitUses(); *ImpUses; ++ImpUses)
ImplicitOperands.push_back(
MachineOperand::CreateReg(*ImpUses, false, true));
const auto *TRI = MF.getSubtarget().getRegisterInfo();
assert(TRI && "Expected target register info");
for (const auto &I : ImplicitOperands) {
if (isImplicitOperandIn(I, Operands))
continue;
return error(Operands.empty() ? Token.location() : Operands.back().End,
Twine("missing implicit register operand '") +
printImplicitRegisterFlag(I) + " %" +
getRegisterName(TRI, I.getReg()) + "'");
}
return false;
}
bool MIParser::parseInstruction(unsigned &OpCode, unsigned &Flags) {
if (Token.is(MIToken::kw_frame_setup)) {
Flags |= MachineInstr::FrameSetup;
lex();
}
if (Token.isNot(MIToken::Identifier))
return error("expected a machine instruction");
StringRef InstrName = Token.stringValue();
if (parseInstrName(InstrName, OpCode))
return error(Twine("unknown machine instruction name '") + InstrName + "'");
lex();
return false;
}
bool MIParser::parseRegister(unsigned &Reg) {
switch (Token.kind()) {
case MIToken::underscore:
Reg = 0;
break;
case MIToken::NamedRegister: {
StringRef Name = Token.stringValue();
if (getRegisterByName(Name, Reg))
return error(Twine("unknown register name '") + Name + "'");
break;
}
case MIToken::VirtualRegister: {
unsigned ID;
if (getUnsigned(ID))
return true;
const auto RegInfo = PFS.VirtualRegisterSlots.find(ID);
if (RegInfo == PFS.VirtualRegisterSlots.end())
return error(Twine("use of undefined virtual register '%") + Twine(ID) +
"'");
Reg = RegInfo->second;
break;
}
// TODO: Parse other register kinds.
default:
llvm_unreachable("The current token should be a register");
}
return false;
}
bool MIParser::parseRegisterFlag(unsigned &Flags) {
const unsigned OldFlags = Flags;
switch (Token.kind()) {
case MIToken::kw_implicit:
Flags |= RegState::Implicit;
break;
case MIToken::kw_implicit_define:
Flags |= RegState::ImplicitDefine;
break;
case MIToken::kw_def:
Flags |= RegState::Define;
break;
case MIToken::kw_dead:
Flags |= RegState::Dead;
break;
case MIToken::kw_killed:
Flags |= RegState::Kill;
break;
case MIToken::kw_undef:
Flags |= RegState::Undef;
break;
case MIToken::kw_internal:
Flags |= RegState::InternalRead;
break;
case MIToken::kw_early_clobber:
Flags |= RegState::EarlyClobber;
break;
case MIToken::kw_debug_use:
Flags |= RegState::Debug;
break;
default:
llvm_unreachable("The current token should be a register flag");
}
if (OldFlags == Flags)
// We know that the same flag is specified more than once when the flags
// weren't modified.
return error("duplicate '" + Token.stringValue() + "' register flag");
lex();
return false;
}
bool MIParser::parseSubRegisterIndex(unsigned &SubReg) {
assert(Token.is(MIToken::colon));
lex();
if (Token.isNot(MIToken::Identifier))
return error("expected a subregister index after ':'");
auto Name = Token.stringValue();
SubReg = getSubRegIndex(Name);
if (!SubReg)
return error(Twine("use of unknown subregister index '") + Name + "'");
lex();
return false;
}
bool MIParser::parseRegisterTiedDefIndex(unsigned &TiedDefIdx) {
if (!consumeIfPresent(MIToken::kw_tied_def))
return error("expected 'tied-def' after '('");
if (Token.isNot(MIToken::IntegerLiteral))
return error("expected an integer literal after 'tied-def'");
if (getUnsigned(TiedDefIdx))
return true;
lex();
if (expectAndConsume(MIToken::rparen))
return true;
return false;
}
bool MIParser::parseSize(unsigned &Size) {
if (Token.isNot(MIToken::IntegerLiteral))
return error("expected an integer literal for the size");
if (getUnsigned(Size))
return true;
lex();
if (expectAndConsume(MIToken::rparen))
return true;
return false;
}
bool MIParser::assignRegisterTies(MachineInstr &MI,
ArrayRef<ParsedMachineOperand> Operands) {
SmallVector<std::pair<unsigned, unsigned>, 4> TiedRegisterPairs;
for (unsigned I = 0, E = Operands.size(); I != E; ++I) {
if (!Operands[I].TiedDefIdx)
continue;
// The parser ensures that this operand is a register use, so we just have
// to check the tied-def operand.
unsigned DefIdx = Operands[I].TiedDefIdx.getValue();
if (DefIdx >= E)
return error(Operands[I].Begin,
Twine("use of invalid tied-def operand index '" +
Twine(DefIdx) + "'; instruction has only ") +
Twine(E) + " operands");
const auto &DefOperand = Operands[DefIdx].Operand;
if (!DefOperand.isReg() || !DefOperand.isDef())
// FIXME: add note with the def operand.
return error(Operands[I].Begin,
Twine("use of invalid tied-def operand index '") +
Twine(DefIdx) + "'; the operand #" + Twine(DefIdx) +
" isn't a defined register");
// Check that the tied-def operand wasn't tied elsewhere.
for (const auto &TiedPair : TiedRegisterPairs) {
if (TiedPair.first == DefIdx)
return error(Operands[I].Begin,
Twine("the tied-def operand #") + Twine(DefIdx) +
" is already tied with another register operand");
}
TiedRegisterPairs.push_back(std::make_pair(DefIdx, I));
}
// FIXME: Verify that for non INLINEASM instructions, the def and use tied
// indices must be less than tied max.
for (const auto &TiedPair : TiedRegisterPairs)
MI.tieOperands(TiedPair.first, TiedPair.second);
return false;
}
bool MIParser::parseRegisterOperand(MachineOperand &Dest,
Optional<unsigned> &TiedDefIdx,
bool IsDef) {
unsigned Reg;
unsigned Flags = IsDef ? RegState::Define : 0;
while (Token.isRegisterFlag()) {
if (parseRegisterFlag(Flags))
return true;
}
if (!Token.isRegister())
return error("expected a register after register flags");
if (parseRegister(Reg))
return true;
lex();
unsigned SubReg = 0;
if (Token.is(MIToken::colon)) {
if (parseSubRegisterIndex(SubReg))
return true;
}
if ((Flags & RegState::Define) == 0) {
if (consumeIfPresent(MIToken::lparen)) {
unsigned Idx;
if (parseRegisterTiedDefIndex(Idx))
return true;
TiedDefIdx = Idx;
}
} else if (consumeIfPresent(MIToken::lparen)) {
// Generic virtual registers must have a size.
// The "must" part will be verify by the machine verifier,
// because at this point we actually do not know if Reg is
// a generic virtual register.
if (!TargetRegisterInfo::isVirtualRegister(Reg))
return error("unexpected size on physical register");
unsigned Size;
if (parseSize(Size))
return true;
MachineRegisterInfo &MRI = MF.getRegInfo();
MRI.setSize(Reg, Size);
}
Dest = MachineOperand::CreateReg(
Reg, Flags & RegState::Define, Flags & RegState::Implicit,
Flags & RegState::Kill, Flags & RegState::Dead, Flags & RegState::Undef,
Flags & RegState::EarlyClobber, SubReg, Flags & RegState::Debug,
Flags & RegState::InternalRead);
return false;
}
bool MIParser::parseImmediateOperand(MachineOperand &Dest) {
assert(Token.is(MIToken::IntegerLiteral));
const APSInt &Int = Token.integerValue();
if (Int.getMinSignedBits() > 64)
return error("integer literal is too large to be an immediate operand");
Dest = MachineOperand::CreateImm(Int.getExtValue());
lex();
return false;
}
bool MIParser::parseIRConstant(StringRef::iterator Loc, StringRef StringValue,
const Constant *&C) {
auto Source = StringValue.str(); // The source has to be null terminated.
SMDiagnostic Err;
C = parseConstantValue(Source.c_str(), Err, *MF.getFunction()->getParent(),
&IRSlots);
if (!C)
return error(Loc + Err.getColumnNo(), Err.getMessage());
return false;
}
bool MIParser::parseIRConstant(StringRef::iterator Loc, const Constant *&C) {
if (parseIRConstant(Loc, StringRef(Loc, Token.range().end() - Loc), C))
return true;
lex();
return false;
}
bool MIParser::parseIRType(StringRef::iterator Loc, StringRef StringValue,
unsigned &Read, Type *&Ty) {
auto Source = StringValue.str(); // The source has to be null terminated.
SMDiagnostic Err;
Ty = parseTypeAtBeginning(Source.c_str(), Read, Err,
*MF.getFunction()->getParent(), &IRSlots);
if (!Ty)
return error(Loc + Err.getColumnNo(), Err.getMessage());
return false;
}
bool MIParser::parseIRType(StringRef::iterator Loc, Type *&Ty,
bool MustBeSized) {
// At this point we enter in the IR world, i.e., to get the correct type,
// we need to hand off the whole string, not just the current token.
// E.g., <4 x i64> would give '<' as a token and there is not much
// the IR parser can do with that.
unsigned Read = 0;
if (parseIRType(Loc, StringRef(Loc), Read, Ty))
return true;
// The type must be sized, otherwise there is not much the backend
// can do with it.
if (MustBeSized && !Ty->isSized())
return error("expected a sized type");
// The next token is Read characters from the Loc.
// However, the current location is not Loc, but Loc + the length of Token.
// Therefore, subtract the length of Token (range().end() - Loc) to the
// number of characters to skip before the next token.
lex(Read - (Token.range().end() - Loc));
return false;
}
bool MIParser::parseTypedImmediateOperand(MachineOperand &Dest) {
assert(Token.is(MIToken::IntegerType));
auto Loc = Token.location();
lex();
if (Token.isNot(MIToken::IntegerLiteral))
return error("expected an integer literal");
const Constant *C = nullptr;
if (parseIRConstant(Loc, C))
return true;
Dest = MachineOperand::CreateCImm(cast<ConstantInt>(C));
return false;
}
bool MIParser::parseFPImmediateOperand(MachineOperand &Dest) {
auto Loc = Token.location();
lex();
if (Token.isNot(MIToken::FloatingPointLiteral))
return error("expected a floating point literal");
const Constant *C = nullptr;
if (parseIRConstant(Loc, C))
return true;
Dest = MachineOperand::CreateFPImm(cast<ConstantFP>(C));
return false;
}
bool MIParser::getUnsigned(unsigned &Result) {
assert(Token.hasIntegerValue() && "Expected a token with an integer value");
const uint64_t Limit = uint64_t(std::numeric_limits<unsigned>::max()) + 1;
uint64_t Val64 = Token.integerValue().getLimitedValue(Limit);
if (Val64 == Limit)
return error("expected 32-bit integer (too large)");
Result = Val64;
return false;
}
bool MIParser::parseMBBReference(MachineBasicBlock *&MBB) {
assert(Token.is(MIToken::MachineBasicBlock) ||
Token.is(MIToken::MachineBasicBlockLabel));
unsigned Number;
if (getUnsigned(Number))
return true;
auto MBBInfo = PFS.MBBSlots.find(Number);
if (MBBInfo == PFS.MBBSlots.end())
return error(Twine("use of undefined machine basic block #") +
Twine(Number));
MBB = MBBInfo->second;
if (!Token.stringValue().empty() && Token.stringValue() != MBB->getName())
return error(Twine("the name of machine basic block #") + Twine(Number) +
" isn't '" + Token.stringValue() + "'");
return false;
}
bool MIParser::parseMBBOperand(MachineOperand &Dest) {
MachineBasicBlock *MBB;
if (parseMBBReference(MBB))
return true;
Dest = MachineOperand::CreateMBB(MBB);
lex();
return false;
}
bool MIParser::parseStackFrameIndex(int &FI) {
assert(Token.is(MIToken::StackObject));
unsigned ID;
if (getUnsigned(ID))
return true;
auto ObjectInfo = PFS.StackObjectSlots.find(ID);
if (ObjectInfo == PFS.StackObjectSlots.end())
return error(Twine("use of undefined stack object '%stack.") + Twine(ID) +
"'");
StringRef Name;
if (const auto *Alloca =
MF.getFrameInfo()->getObjectAllocation(ObjectInfo->second))
Name = Alloca->getName();
if (!Token.stringValue().empty() && Token.stringValue() != Name)
return error(Twine("the name of the stack object '%stack.") + Twine(ID) +
"' isn't '" + Token.stringValue() + "'");
lex();
FI = ObjectInfo->second;
return false;
}
bool MIParser::parseStackObjectOperand(MachineOperand &Dest) {
int FI;
if (parseStackFrameIndex(FI))
return true;
Dest = MachineOperand::CreateFI(FI);
return false;
}
bool MIParser::parseFixedStackFrameIndex(int &FI) {
assert(Token.is(MIToken::FixedStackObject));
unsigned ID;
if (getUnsigned(ID))
return true;
auto ObjectInfo = PFS.FixedStackObjectSlots.find(ID);
if (ObjectInfo == PFS.FixedStackObjectSlots.end())
return error(Twine("use of undefined fixed stack object '%fixed-stack.") +
Twine(ID) + "'");
lex();
FI = ObjectInfo->second;
return false;
}
bool MIParser::parseFixedStackObjectOperand(MachineOperand &Dest) {
int FI;
if (parseFixedStackFrameIndex(FI))
return true;
Dest = MachineOperand::CreateFI(FI);
return false;
}
bool MIParser::parseGlobalValue(GlobalValue *&GV) {
switch (Token.kind()) {
case MIToken::NamedGlobalValue: {
const Module *M = MF.getFunction()->getParent();
GV = M->getNamedValue(Token.stringValue());
if (!GV)
return error(Twine("use of undefined global value '") + Token.range() +
"'");
break;
}
case MIToken::GlobalValue: {
unsigned GVIdx;
if (getUnsigned(GVIdx))
return true;
if (GVIdx >= IRSlots.GlobalValues.size())
return error(Twine("use of undefined global value '@") + Twine(GVIdx) +
"'");
GV = IRSlots.GlobalValues[GVIdx];
break;
}
default:
llvm_unreachable("The current token should be a global value");
}
return false;
}
bool MIParser::parseGlobalAddressOperand(MachineOperand &Dest) {
GlobalValue *GV = nullptr;
if (parseGlobalValue(GV))
return true;
lex();
Dest = MachineOperand::CreateGA(GV, /*Offset=*/0);
if (parseOperandsOffset(Dest))
return true;
return false;
}
bool MIParser::parseConstantPoolIndexOperand(MachineOperand &Dest) {
assert(Token.is(MIToken::ConstantPoolItem));
unsigned ID;
if (getUnsigned(ID))
return true;
auto ConstantInfo = PFS.ConstantPoolSlots.find(ID);
if (ConstantInfo == PFS.ConstantPoolSlots.end())
return error("use of undefined constant '%const." + Twine(ID) + "'");
lex();
Dest = MachineOperand::CreateCPI(ID, /*Offset=*/0);
if (parseOperandsOffset(Dest))
return true;
return false;
}
bool MIParser::parseJumpTableIndexOperand(MachineOperand &Dest) {
assert(Token.is(MIToken::JumpTableIndex));
unsigned ID;
if (getUnsigned(ID))
return true;
auto JumpTableEntryInfo = PFS.JumpTableSlots.find(ID);
if (JumpTableEntryInfo == PFS.JumpTableSlots.end())
return error("use of undefined jump table '%jump-table." + Twine(ID) + "'");
lex();
Dest = MachineOperand::CreateJTI(JumpTableEntryInfo->second);
return false;
}
bool MIParser::parseExternalSymbolOperand(MachineOperand &Dest) {
assert(Token.is(MIToken::ExternalSymbol));
const char *Symbol = MF.createExternalSymbolName(Token.stringValue());
lex();
Dest = MachineOperand::CreateES(Symbol);
if (parseOperandsOffset(Dest))
return true;
return false;
}
bool MIParser::parseSubRegisterIndexOperand(MachineOperand &Dest) {
assert(Token.is(MIToken::SubRegisterIndex));
StringRef Name = Token.stringValue();
unsigned SubRegIndex = getSubRegIndex(Token.stringValue());
if (SubRegIndex == 0)
return error(Twine("unknown subregister index '") + Name + "'");
lex();
Dest = MachineOperand::CreateImm(SubRegIndex);
return false;
}
bool MIParser::parseMDNode(MDNode *&Node) {
assert(Token.is(MIToken::exclaim));
auto Loc = Token.location();
lex();
if (Token.isNot(MIToken::IntegerLiteral) || Token.integerValue().isSigned())
return error("expected metadata id after '!'");
unsigned ID;
if (getUnsigned(ID))
return true;
auto NodeInfo = IRSlots.MetadataNodes.find(ID);
if (NodeInfo == IRSlots.MetadataNodes.end())
return error(Loc, "use of undefined metadata '!" + Twine(ID) + "'");
lex();
Node = NodeInfo->second.get();
return false;
}
bool MIParser::parseMetadataOperand(MachineOperand &Dest) {
MDNode *Node = nullptr;
if (parseMDNode(Node))
return true;
Dest = MachineOperand::CreateMetadata(Node);
return false;
}
bool MIParser::parseCFIOffset(int &Offset) {
if (Token.isNot(MIToken::IntegerLiteral))
return error("expected a cfi offset");
if (Token.integerValue().getMinSignedBits() > 32)
return error("expected a 32 bit integer (the cfi offset is too large)");
Offset = (int)Token.integerValue().getExtValue();
lex();
return false;
}
bool MIParser::parseCFIRegister(unsigned &Reg) {
if (Token.isNot(MIToken::NamedRegister))
return error("expected a cfi register");
unsigned LLVMReg;
if (parseRegister(LLVMReg))
return true;
const auto *TRI = MF.getSubtarget().getRegisterInfo();
assert(TRI && "Expected target register info");
int DwarfReg = TRI->getDwarfRegNum(LLVMReg, true);
if (DwarfReg < 0)
return error("invalid DWARF register");
Reg = (unsigned)DwarfReg;
lex();
return false;
}
bool MIParser::parseCFIOperand(MachineOperand &Dest) {
auto Kind = Token.kind();
lex();
auto &MMI = MF.getMMI();
int Offset;
unsigned Reg;
unsigned CFIIndex;
switch (Kind) {
case MIToken::kw_cfi_same_value:
if (parseCFIRegister(Reg))
return true;
CFIIndex =
MMI.addFrameInst(MCCFIInstruction::createSameValue(nullptr, Reg));
break;
case MIToken::kw_cfi_offset:
if (parseCFIRegister(Reg) || expectAndConsume(MIToken::comma) ||
parseCFIOffset(Offset))
return true;
CFIIndex =
MMI.addFrameInst(MCCFIInstruction::createOffset(nullptr, Reg, Offset));
break;
case MIToken::kw_cfi_def_cfa_register:
if (parseCFIRegister(Reg))
return true;
CFIIndex =
MMI.addFrameInst(MCCFIInstruction::createDefCfaRegister(nullptr, Reg));
break;
case MIToken::kw_cfi_def_cfa_offset:
if (parseCFIOffset(Offset))
return true;
// NB: MCCFIInstruction::createDefCfaOffset negates the offset.
CFIIndex = MMI.addFrameInst(
MCCFIInstruction::createDefCfaOffset(nullptr, -Offset));
break;
case MIToken::kw_cfi_def_cfa:
if (parseCFIRegister(Reg) || expectAndConsume(MIToken::comma) ||
parseCFIOffset(Offset))
return true;
// NB: MCCFIInstruction::createDefCfa negates the offset.
CFIIndex =
MMI.addFrameInst(MCCFIInstruction::createDefCfa(nullptr, Reg, -Offset));
break;
default:
// TODO: Parse the other CFI operands.
llvm_unreachable("The current token should be a cfi operand");
}
Dest = MachineOperand::CreateCFIIndex(CFIIndex);
return false;
}
bool MIParser::parseIRBlock(BasicBlock *&BB, const Function &F) {
switch (Token.kind()) {
case MIToken::NamedIRBlock: {
BB = dyn_cast_or_null<BasicBlock>(
F.getValueSymbolTable().lookup(Token.stringValue()));
if (!BB)
return error(Twine("use of undefined IR block '") + Token.range() + "'");
break;
}
case MIToken::IRBlock: {
unsigned SlotNumber = 0;
if (getUnsigned(SlotNumber))
return true;
BB = const_cast<BasicBlock *>(getIRBlock(SlotNumber, F));
if (!BB)
return error(Twine("use of undefined IR block '%ir-block.") +
Twine(SlotNumber) + "'");
break;
}
default:
llvm_unreachable("The current token should be an IR block reference");
}
return false;
}
bool MIParser::parseBlockAddressOperand(MachineOperand &Dest) {
assert(Token.is(MIToken::kw_blockaddress));
lex();
if (expectAndConsume(MIToken::lparen))
return true;
if (Token.isNot(MIToken::GlobalValue) &&
Token.isNot(MIToken::NamedGlobalValue))
return error("expected a global value");
GlobalValue *GV = nullptr;
if (parseGlobalValue(GV))
return true;
auto *F = dyn_cast<Function>(GV);
if (!F)
return error("expected an IR function reference");
lex();
if (expectAndConsume(MIToken::comma))
return true;
BasicBlock *BB = nullptr;
if (Token.isNot(MIToken::IRBlock) && Token.isNot(MIToken::NamedIRBlock))
return error("expected an IR block reference");
if (parseIRBlock(BB, *F))
return true;
lex();
if (expectAndConsume(MIToken::rparen))
return true;
Dest = MachineOperand::CreateBA(BlockAddress::get(F, BB), /*Offset=*/0);
if (parseOperandsOffset(Dest))
return true;
return false;
}
bool MIParser::parseTargetIndexOperand(MachineOperand &Dest) {
assert(Token.is(MIToken::kw_target_index));
lex();
if (expectAndConsume(MIToken::lparen))
return true;
if (Token.isNot(MIToken::Identifier))
return error("expected the name of the target index");
int Index = 0;
if (getTargetIndex(Token.stringValue(), Index))
return error("use of undefined target index '" + Token.stringValue() + "'");
lex();
if (expectAndConsume(MIToken::rparen))
return true;
Dest = MachineOperand::CreateTargetIndex(unsigned(Index), /*Offset=*/0);
if (parseOperandsOffset(Dest))
return true;
return false;
}
bool MIParser::parseLiveoutRegisterMaskOperand(MachineOperand &Dest) {
assert(Token.is(MIToken::kw_liveout));
const auto *TRI = MF.getSubtarget().getRegisterInfo();
assert(TRI && "Expected target register info");
uint32_t *Mask = MF.allocateRegisterMask(TRI->getNumRegs());
lex();
if (expectAndConsume(MIToken::lparen))
return true;
while (true) {
if (Token.isNot(MIToken::NamedRegister))
return error("expected a named register");
unsigned Reg = 0;
if (parseRegister(Reg))
return true;
lex();
Mask[Reg / 32] |= 1U << (Reg % 32);
// TODO: Report an error if the same register is used more than once.
if (Token.isNot(MIToken::comma))
break;
lex();
}
if (expectAndConsume(MIToken::rparen))
return true;
Dest = MachineOperand::CreateRegLiveOut(Mask);
return false;
}
bool MIParser::parseMachineOperand(MachineOperand &Dest,
Optional<unsigned> &TiedDefIdx) {
switch (Token.kind()) {
case MIToken::kw_implicit:
case MIToken::kw_implicit_define:
case MIToken::kw_def:
case MIToken::kw_dead:
case MIToken::kw_killed:
case MIToken::kw_undef:
case MIToken::kw_internal:
case MIToken::kw_early_clobber:
case MIToken::kw_debug_use:
case MIToken::underscore:
case MIToken::NamedRegister:
case MIToken::VirtualRegister:
return parseRegisterOperand(Dest, TiedDefIdx);
case MIToken::IntegerLiteral:
return parseImmediateOperand(Dest);
case MIToken::IntegerType:
return parseTypedImmediateOperand(Dest);
case MIToken::kw_half:
case MIToken::kw_float:
case MIToken::kw_double:
case MIToken::kw_x86_fp80:
case MIToken::kw_fp128:
case MIToken::kw_ppc_fp128:
return parseFPImmediateOperand(Dest);
case MIToken::MachineBasicBlock:
return parseMBBOperand(Dest);
case MIToken::StackObject:
return parseStackObjectOperand(Dest);
case MIToken::FixedStackObject:
return parseFixedStackObjectOperand(Dest);
case MIToken::GlobalValue:
case MIToken::NamedGlobalValue:
return parseGlobalAddressOperand(Dest);
case MIToken::ConstantPoolItem:
return parseConstantPoolIndexOperand(Dest);
case MIToken::JumpTableIndex:
return parseJumpTableIndexOperand(Dest);
case MIToken::ExternalSymbol:
return parseExternalSymbolOperand(Dest);
case MIToken::SubRegisterIndex:
return parseSubRegisterIndexOperand(Dest);
case MIToken::exclaim:
return parseMetadataOperand(Dest);
case MIToken::kw_cfi_same_value:
case MIToken::kw_cfi_offset:
case MIToken::kw_cfi_def_cfa_register:
case MIToken::kw_cfi_def_cfa_offset:
case MIToken::kw_cfi_def_cfa:
return parseCFIOperand(Dest);
case MIToken::kw_blockaddress:
return parseBlockAddressOperand(Dest);
case MIToken::kw_target_index:
return parseTargetIndexOperand(Dest);
case MIToken::kw_liveout:
return parseLiveoutRegisterMaskOperand(Dest);
case MIToken::Error:
return true;
case MIToken::Identifier:
if (const auto *RegMask = getRegMask(Token.stringValue())) {
Dest = MachineOperand::CreateRegMask(RegMask);
lex();
break;
}
// fallthrough
default:
// FIXME: Parse the MCSymbol machine operand.
return error("expected a machine operand");
}
return false;
}
bool MIParser::parseMachineOperandAndTargetFlags(
MachineOperand &Dest, Optional<unsigned> &TiedDefIdx) {
unsigned TF = 0;
bool HasTargetFlags = false;
if (Token.is(MIToken::kw_target_flags)) {
HasTargetFlags = true;
lex();
if (expectAndConsume(MIToken::lparen))
return true;
if (Token.isNot(MIToken::Identifier))
return error("expected the name of the target flag");
if (getDirectTargetFlag(Token.stringValue(), TF)) {
if (getBitmaskTargetFlag(Token.stringValue(), TF))
return error("use of undefined target flag '" + Token.stringValue() +
"'");
}
lex();
while (Token.is(MIToken::comma)) {
lex();
if (Token.isNot(MIToken::Identifier))
return error("expected the name of the target flag");
unsigned BitFlag = 0;
if (getBitmaskTargetFlag(Token.stringValue(), BitFlag))
return error("use of undefined target flag '" + Token.stringValue() +
"'");
// TODO: Report an error when using a duplicate bit target flag.
TF |= BitFlag;
lex();
}
if (expectAndConsume(MIToken::rparen))
return true;
}
auto Loc = Token.location();
if (parseMachineOperand(Dest, TiedDefIdx))
return true;
if (!HasTargetFlags)
return false;
if (Dest.isReg())
return error(Loc, "register operands can't have target flags");
Dest.setTargetFlags(TF);
return false;
}
bool MIParser::parseOffset(int64_t &Offset) {
if (Token.isNot(MIToken::plus) && Token.isNot(MIToken::minus))
return false;
StringRef Sign = Token.range();
bool IsNegative = Token.is(MIToken::minus);
lex();
if (Token.isNot(MIToken::IntegerLiteral))
return error("expected an integer literal after '" + Sign + "'");
if (Token.integerValue().getMinSignedBits() > 64)
return error("expected 64-bit integer (too large)");
Offset = Token.integerValue().getExtValue();
if (IsNegative)
Offset = -Offset;
lex();
return false;
}
bool MIParser::parseAlignment(unsigned &Alignment) {
assert(Token.is(MIToken::kw_align));
lex();
if (Token.isNot(MIToken::IntegerLiteral) || Token.integerValue().isSigned())
return error("expected an integer literal after 'align'");
if (getUnsigned(Alignment))
return true;
lex();
return false;
}
bool MIParser::parseOperandsOffset(MachineOperand &Op) {
int64_t Offset = 0;
if (parseOffset(Offset))
return true;
Op.setOffset(Offset);
return false;
}
bool MIParser::parseIRValue(const Value *&V) {
switch (Token.kind()) {
case MIToken::NamedIRValue: {
V = MF.getFunction()->getValueSymbolTable().lookup(Token.stringValue());
break;
}
case MIToken::IRValue: {
unsigned SlotNumber = 0;
if (getUnsigned(SlotNumber))
return true;
V = getIRValue(SlotNumber);
break;
}
case MIToken::NamedGlobalValue:
case MIToken::GlobalValue: {
GlobalValue *GV = nullptr;
if (parseGlobalValue(GV))
return true;
V = GV;
break;
}
case MIToken::QuotedIRValue: {
const Constant *C = nullptr;
if (parseIRConstant(Token.location(), Token.stringValue(), C))
return true;
V = C;
break;
}
default:
llvm_unreachable("The current token should be an IR block reference");
}
if (!V)
return error(Twine("use of undefined IR value '") + Token.range() + "'");
return false;
}
bool MIParser::getUint64(uint64_t &Result) {
assert(Token.hasIntegerValue());
if (Token.integerValue().getActiveBits() > 64)
return error("expected 64-bit integer (too large)");
Result = Token.integerValue().getZExtValue();
return false;
}
bool MIParser::parseMemoryOperandFlag(unsigned &Flags) {
const unsigned OldFlags = Flags;
switch (Token.kind()) {
case MIToken::kw_volatile:
Flags |= MachineMemOperand::MOVolatile;
break;
case MIToken::kw_non_temporal:
Flags |= MachineMemOperand::MONonTemporal;
break;
case MIToken::kw_invariant:
Flags |= MachineMemOperand::MOInvariant;
break;
// TODO: parse the target specific memory operand flags.
default:
llvm_unreachable("The current token should be a memory operand flag");
}
if (OldFlags == Flags)
// We know that the same flag is specified more than once when the flags
// weren't modified.
return error("duplicate '" + Token.stringValue() + "' memory operand flag");
lex();
return false;
}
bool MIParser::parseMemoryPseudoSourceValue(const PseudoSourceValue *&PSV) {
switch (Token.kind()) {
case MIToken::kw_stack:
PSV = MF.getPSVManager().getStack();
break;
case MIToken::kw_got:
PSV = MF.getPSVManager().getGOT();
break;
case MIToken::kw_jump_table:
PSV = MF.getPSVManager().getJumpTable();
break;
case MIToken::kw_constant_pool:
PSV = MF.getPSVManager().getConstantPool();
break;
case MIToken::FixedStackObject: {
int FI;
if (parseFixedStackFrameIndex(FI))
return true;
PSV = MF.getPSVManager().getFixedStack(FI);
// The token was already consumed, so use return here instead of break.
return false;
}
case MIToken::kw_call_entry: {
lex();
switch (Token.kind()) {
case MIToken::GlobalValue:
case MIToken::NamedGlobalValue: {
GlobalValue *GV = nullptr;
if (parseGlobalValue(GV))
return true;
PSV = MF.getPSVManager().getGlobalValueCallEntry(GV);
break;
}
case MIToken::ExternalSymbol:
PSV = MF.getPSVManager().getExternalSymbolCallEntry(
MF.createExternalSymbolName(Token.stringValue()));
break;
default:
return error(
"expected a global value or an external symbol after 'call-entry'");
}
break;
}
default:
llvm_unreachable("The current token should be pseudo source value");
}
lex();
return false;
}
bool MIParser::parseMachinePointerInfo(MachinePointerInfo &Dest) {
if (Token.is(MIToken::kw_constant_pool) || Token.is(MIToken::kw_stack) ||
Token.is(MIToken::kw_got) || Token.is(MIToken::kw_jump_table) ||
Token.is(MIToken::FixedStackObject) || Token.is(MIToken::kw_call_entry)) {
const PseudoSourceValue *PSV = nullptr;
if (parseMemoryPseudoSourceValue(PSV))
return true;
int64_t Offset = 0;
if (parseOffset(Offset))
return true;
Dest = MachinePointerInfo(PSV, Offset);
return false;
}
if (Token.isNot(MIToken::NamedIRValue) && Token.isNot(MIToken::IRValue) &&
Token.isNot(MIToken::GlobalValue) &&
Token.isNot(MIToken::NamedGlobalValue) &&
Token.isNot(MIToken::QuotedIRValue))
return error("expected an IR value reference");
const Value *V = nullptr;
if (parseIRValue(V))
return true;
if (!V->getType()->isPointerTy())
return error("expected a pointer IR value");
lex();
int64_t Offset = 0;
if (parseOffset(Offset))
return true;
Dest = MachinePointerInfo(V, Offset);
return false;
}
bool MIParser::parseMachineMemoryOperand(MachineMemOperand *&Dest) {
if (expectAndConsume(MIToken::lparen))
return true;
unsigned Flags = 0;
while (Token.isMemoryOperandFlag()) {
if (parseMemoryOperandFlag(Flags))
return true;
}
if (Token.isNot(MIToken::Identifier) ||
(Token.stringValue() != "load" && Token.stringValue() != "store"))
return error("expected 'load' or 'store' memory operation");
if (Token.stringValue() == "load")
Flags |= MachineMemOperand::MOLoad;
else
Flags |= MachineMemOperand::MOStore;
lex();
if (Token.isNot(MIToken::IntegerLiteral))
return error("expected the size integer literal after memory operation");
uint64_t Size;
if (getUint64(Size))
return true;
lex();
const char *Word = Flags & MachineMemOperand::MOLoad ? "from" : "into";
if (Token.isNot(MIToken::Identifier) || Token.stringValue() != Word)
return error(Twine("expected '") + Word + "'");
lex();
MachinePointerInfo Ptr = MachinePointerInfo();
if (parseMachinePointerInfo(Ptr))
return true;
unsigned BaseAlignment = Size;
AAMDNodes AAInfo;
MDNode *Range = nullptr;
while (consumeIfPresent(MIToken::comma)) {
switch (Token.kind()) {
case MIToken::kw_align:
if (parseAlignment(BaseAlignment))
return true;
break;
case MIToken::md_tbaa:
lex();
if (parseMDNode(AAInfo.TBAA))
return true;
break;
case MIToken::md_alias_scope:
lex();
if (parseMDNode(AAInfo.Scope))
return true;
break;
case MIToken::md_noalias:
lex();
if (parseMDNode(AAInfo.NoAlias))
return true;
break;
case MIToken::md_range:
lex();
if (parseMDNode(Range))
return true;
break;
// TODO: Report an error on duplicate metadata nodes.
default:
return error("expected 'align' or '!tbaa' or '!alias.scope' or "
"'!noalias' or '!range'");
}
}
if (expectAndConsume(MIToken::rparen))
return true;
Dest =
MF.getMachineMemOperand(Ptr, Flags, Size, BaseAlignment, AAInfo, Range);
return false;
}
void MIParser::initNames2InstrOpCodes() {
if (!Names2InstrOpCodes.empty())
return;
const auto *TII = MF.getSubtarget().getInstrInfo();
assert(TII && "Expected target instruction info");
for (unsigned I = 0, E = TII->getNumOpcodes(); I < E; ++I)
Names2InstrOpCodes.insert(std::make_pair(StringRef(TII->getName(I)), I));
}
bool MIParser::parseInstrName(StringRef InstrName, unsigned &OpCode) {
initNames2InstrOpCodes();
auto InstrInfo = Names2InstrOpCodes.find(InstrName);
if (InstrInfo == Names2InstrOpCodes.end())
return true;
OpCode = InstrInfo->getValue();
return false;
}
void MIParser::initNames2Regs() {
if (!Names2Regs.empty())
return;
// The '%noreg' register is the register 0.
Names2Regs.insert(std::make_pair("noreg", 0));
const auto *TRI = MF.getSubtarget().getRegisterInfo();
assert(TRI && "Expected target register info");
for (unsigned I = 0, E = TRI->getNumRegs(); I < E; ++I) {
bool WasInserted =
Names2Regs.insert(std::make_pair(StringRef(TRI->getName(I)).lower(), I))
.second;
(void)WasInserted;
assert(WasInserted && "Expected registers to be unique case-insensitively");
}
}
bool MIParser::getRegisterByName(StringRef RegName, unsigned &Reg) {
initNames2Regs();
auto RegInfo = Names2Regs.find(RegName);
if (RegInfo == Names2Regs.end())
return true;
Reg = RegInfo->getValue();
return false;
}
void MIParser::initNames2RegMasks() {
if (!Names2RegMasks.empty())
return;
const auto *TRI = MF.getSubtarget().getRegisterInfo();
assert(TRI && "Expected target register info");
ArrayRef<const uint32_t *> RegMasks = TRI->getRegMasks();
ArrayRef<const char *> RegMaskNames = TRI->getRegMaskNames();
assert(RegMasks.size() == RegMaskNames.size());
for (size_t I = 0, E = RegMasks.size(); I < E; ++I)
Names2RegMasks.insert(
std::make_pair(StringRef(RegMaskNames[I]).lower(), RegMasks[I]));
}
const uint32_t *MIParser::getRegMask(StringRef Identifier) {
initNames2RegMasks();
auto RegMaskInfo = Names2RegMasks.find(Identifier);
if (RegMaskInfo == Names2RegMasks.end())
return nullptr;
return RegMaskInfo->getValue();
}
void MIParser::initNames2SubRegIndices() {
if (!Names2SubRegIndices.empty())
return;
const TargetRegisterInfo *TRI = MF.getSubtarget().getRegisterInfo();
for (unsigned I = 1, E = TRI->getNumSubRegIndices(); I < E; ++I)
Names2SubRegIndices.insert(
std::make_pair(StringRef(TRI->getSubRegIndexName(I)).lower(), I));
}
unsigned MIParser::getSubRegIndex(StringRef Name) {
initNames2SubRegIndices();
auto SubRegInfo = Names2SubRegIndices.find(Name);
if (SubRegInfo == Names2SubRegIndices.end())
return 0;
return SubRegInfo->getValue();
}
static void initSlots2BasicBlocks(
const Function &F,
DenseMap<unsigned, const BasicBlock *> &Slots2BasicBlocks) {
ModuleSlotTracker MST(F.getParent(), /*ShouldInitializeAllMetadata=*/false);
MST.incorporateFunction(F);
for (auto &BB : F) {
if (BB.hasName())
continue;
int Slot = MST.getLocalSlot(&BB);
if (Slot == -1)
continue;
Slots2BasicBlocks.insert(std::make_pair(unsigned(Slot), &BB));
}
}
static const BasicBlock *getIRBlockFromSlot(
unsigned Slot,
const DenseMap<unsigned, const BasicBlock *> &Slots2BasicBlocks) {
auto BlockInfo = Slots2BasicBlocks.find(Slot);
if (BlockInfo == Slots2BasicBlocks.end())
return nullptr;
return BlockInfo->second;
}
const BasicBlock *MIParser::getIRBlock(unsigned Slot) {
if (Slots2BasicBlocks.empty())
initSlots2BasicBlocks(*MF.getFunction(), Slots2BasicBlocks);
return getIRBlockFromSlot(Slot, Slots2BasicBlocks);
}
const BasicBlock *MIParser::getIRBlock(unsigned Slot, const Function &F) {
if (&F == MF.getFunction())
return getIRBlock(Slot);
DenseMap<unsigned, const BasicBlock *> CustomSlots2BasicBlocks;
initSlots2BasicBlocks(F, CustomSlots2BasicBlocks);
return getIRBlockFromSlot(Slot, CustomSlots2BasicBlocks);
}
static void mapValueToSlot(const Value *V, ModuleSlotTracker &MST,
DenseMap<unsigned, const Value *> &Slots2Values) {
int Slot = MST.getLocalSlot(V);
if (Slot == -1)
return;
Slots2Values.insert(std::make_pair(unsigned(Slot), V));
}
/// Creates the mapping from slot numbers to function's unnamed IR values.
static void initSlots2Values(const Function &F,
DenseMap<unsigned, const Value *> &Slots2Values) {
ModuleSlotTracker MST(F.getParent(), /*ShouldInitializeAllMetadata=*/false);
MST.incorporateFunction(F);
for (const auto &Arg : F.args())
mapValueToSlot(&Arg, MST, Slots2Values);
for (const auto &BB : F) {
mapValueToSlot(&BB, MST, Slots2Values);
for (const auto &I : BB)
mapValueToSlot(&I, MST, Slots2Values);
}
}
const Value *MIParser::getIRValue(unsigned Slot) {
if (Slots2Values.empty())
initSlots2Values(*MF.getFunction(), Slots2Values);
auto ValueInfo = Slots2Values.find(Slot);
if (ValueInfo == Slots2Values.end())
return nullptr;
return ValueInfo->second;
}
void MIParser::initNames2TargetIndices() {
if (!Names2TargetIndices.empty())
return;
const auto *TII = MF.getSubtarget().getInstrInfo();
assert(TII && "Expected target instruction info");
auto Indices = TII->getSerializableTargetIndices();
for (const auto &I : Indices)
Names2TargetIndices.insert(std::make_pair(StringRef(I.second), I.first));
}
bool MIParser::getTargetIndex(StringRef Name, int &Index) {
initNames2TargetIndices();
auto IndexInfo = Names2TargetIndices.find(Name);
if (IndexInfo == Names2TargetIndices.end())
return true;
Index = IndexInfo->second;
return false;
}
void MIParser::initNames2DirectTargetFlags() {
if (!Names2DirectTargetFlags.empty())
return;
const auto *TII = MF.getSubtarget().getInstrInfo();
assert(TII && "Expected target instruction info");
auto Flags = TII->getSerializableDirectMachineOperandTargetFlags();
for (const auto &I : Flags)
Names2DirectTargetFlags.insert(
std::make_pair(StringRef(I.second), I.first));
}
bool MIParser::getDirectTargetFlag(StringRef Name, unsigned &Flag) {
initNames2DirectTargetFlags();
auto FlagInfo = Names2DirectTargetFlags.find(Name);
if (FlagInfo == Names2DirectTargetFlags.end())
return true;
Flag = FlagInfo->second;
return false;
}
void MIParser::initNames2BitmaskTargetFlags() {
if (!Names2BitmaskTargetFlags.empty())
return;
const auto *TII = MF.getSubtarget().getInstrInfo();
assert(TII && "Expected target instruction info");
auto Flags = TII->getSerializableBitmaskMachineOperandTargetFlags();
for (const auto &I : Flags)
Names2BitmaskTargetFlags.insert(
std::make_pair(StringRef(I.second), I.first));
}
bool MIParser::getBitmaskTargetFlag(StringRef Name, unsigned &Flag) {
initNames2BitmaskTargetFlags();
auto FlagInfo = Names2BitmaskTargetFlags.find(Name);
if (FlagInfo == Names2BitmaskTargetFlags.end())
return true;
Flag = FlagInfo->second;
return false;
}
bool llvm::parseMachineBasicBlockDefinitions(MachineFunction &MF, StringRef Src,
PerFunctionMIParsingState &PFS,
const SlotMapping &IRSlots,
SMDiagnostic &Error) {
SourceMgr SM;
SM.AddNewSourceBuffer(
MemoryBuffer::getMemBuffer(Src, "", /*RequiresNullTerminator=*/false),
SMLoc());
return MIParser(SM, MF, Error, Src, PFS, IRSlots)
.parseBasicBlockDefinitions(PFS.MBBSlots);
}
bool llvm::parseMachineInstructions(MachineFunction &MF, StringRef Src,
const PerFunctionMIParsingState &PFS,
const SlotMapping &IRSlots,
SMDiagnostic &Error) {
SourceMgr SM;
SM.AddNewSourceBuffer(
MemoryBuffer::getMemBuffer(Src, "", /*RequiresNullTerminator=*/false),
SMLoc());
return MIParser(SM, MF, Error, Src, PFS, IRSlots).parseBasicBlocks();
}
bool llvm::parseMBBReference(MachineBasicBlock *&MBB, SourceMgr &SM,
MachineFunction &MF, StringRef Src,
const PerFunctionMIParsingState &PFS,
const SlotMapping &IRSlots, SMDiagnostic &Error) {
return MIParser(SM, MF, Error, Src, PFS, IRSlots).parseStandaloneMBB(MBB);
}
bool llvm::parseNamedRegisterReference(unsigned &Reg, SourceMgr &SM,
MachineFunction &MF, StringRef Src,
const PerFunctionMIParsingState &PFS,
const SlotMapping &IRSlots,
SMDiagnostic &Error) {
return MIParser(SM, MF, Error, Src, PFS, IRSlots)
.parseStandaloneNamedRegister(Reg);
}
bool llvm::parseVirtualRegisterReference(unsigned &Reg, SourceMgr &SM,
MachineFunction &MF, StringRef Src,
const PerFunctionMIParsingState &PFS,
const SlotMapping &IRSlots,
SMDiagnostic &Error) {
return MIParser(SM, MF, Error, Src, PFS, IRSlots)
.parseStandaloneVirtualRegister(Reg);
}
bool llvm::parseStackObjectReference(int &FI, SourceMgr &SM,
MachineFunction &MF, StringRef Src,
const PerFunctionMIParsingState &PFS,
const SlotMapping &IRSlots,
SMDiagnostic &Error) {
return MIParser(SM, MF, Error, Src, PFS, IRSlots)
.parseStandaloneStackObject(FI);
}
bool llvm::parseMDNode(MDNode *&Node, SourceMgr &SM, MachineFunction &MF,
StringRef Src, const PerFunctionMIParsingState &PFS,
const SlotMapping &IRSlots, SMDiagnostic &Error) {
return MIParser(SM, MF, Error, Src, PFS, IRSlots).parseStandaloneMDNode(Node);
}
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