1 //===- MIParser.cpp - Machine instructions parser implementation ----------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file implements the parsing of machine instructions.
12 //===----------------------------------------------------------------------===//
16 #include "llvm/ADT/StringMap.h"
17 #include "llvm/AsmParser/SlotMapping.h"
18 #include "llvm/CodeGen/MachineBasicBlock.h"
19 #include "llvm/CodeGen/MachineFunction.h"
20 #include "llvm/CodeGen/MachineFrameInfo.h"
21 #include "llvm/CodeGen/MachineInstr.h"
22 #include "llvm/CodeGen/MachineInstrBuilder.h"
23 #include "llvm/CodeGen/MachineModuleInfo.h"
24 #include "llvm/IR/Instructions.h"
25 #include "llvm/IR/Module.h"
26 #include "llvm/Support/raw_ostream.h"
27 #include "llvm/Support/SourceMgr.h"
28 #include "llvm/Target/TargetSubtargetInfo.h"
29 #include "llvm/Target/TargetInstrInfo.h"
35 struct StringValueUtility {
37 std::string UnescapedString;
39 StringValueUtility(const MIToken &Token) {
40 if (Token.isStringValueQuoted()) {
41 Token.unescapeQuotedStringValue(UnescapedString);
42 String = UnescapedString;
45 String = Token.stringValue();
48 operator StringRef() const { return String; }
51 /// A wrapper struct around the 'MachineOperand' struct that includes a source
53 struct MachineOperandWithLocation {
54 MachineOperand Operand;
55 StringRef::iterator Begin;
56 StringRef::iterator End;
58 MachineOperandWithLocation(const MachineOperand &Operand,
59 StringRef::iterator Begin, StringRef::iterator End)
60 : Operand(Operand), Begin(Begin), End(End) {}
67 StringRef Source, CurrentSource;
69 const PerFunctionMIParsingState &PFS;
70 /// Maps from indices to unnamed global values and metadata nodes.
71 const SlotMapping &IRSlots;
72 /// Maps from instruction names to op codes.
73 StringMap<unsigned> Names2InstrOpCodes;
74 /// Maps from register names to registers.
75 StringMap<unsigned> Names2Regs;
76 /// Maps from register mask names to register masks.
77 StringMap<const uint32_t *> Names2RegMasks;
78 /// Maps from subregister names to subregister indices.
79 StringMap<unsigned> Names2SubRegIndices;
82 MIParser(SourceMgr &SM, MachineFunction &MF, SMDiagnostic &Error,
83 StringRef Source, const PerFunctionMIParsingState &PFS,
84 const SlotMapping &IRSlots);
88 /// Report an error at the current location with the given message.
90 /// This function always return true.
91 bool error(const Twine &Msg);
93 /// Report an error at the given location with the given message.
95 /// This function always return true.
96 bool error(StringRef::iterator Loc, const Twine &Msg);
98 bool parse(MachineInstr *&MI);
99 bool parseMBB(MachineBasicBlock *&MBB);
100 bool parseNamedRegister(unsigned &Reg);
102 bool parseRegister(unsigned &Reg);
103 bool parseRegisterFlag(unsigned &Flags);
104 bool parseSubRegisterIndex(unsigned &SubReg);
105 bool parseRegisterOperand(MachineOperand &Dest, bool IsDef = false);
106 bool parseImmediateOperand(MachineOperand &Dest);
107 bool parseMBBReference(MachineBasicBlock *&MBB);
108 bool parseMBBOperand(MachineOperand &Dest);
109 bool parseStackObjectOperand(MachineOperand &Dest);
110 bool parseFixedStackObjectOperand(MachineOperand &Dest);
111 bool parseGlobalAddressOperand(MachineOperand &Dest);
112 bool parseConstantPoolIndexOperand(MachineOperand &Dest);
113 bool parseJumpTableIndexOperand(MachineOperand &Dest);
114 bool parseExternalSymbolOperand(MachineOperand &Dest);
115 bool parseMDNode(MDNode *&Node);
116 bool parseMetadataOperand(MachineOperand &Dest);
117 bool parseCFIOffset(int &Offset);
118 bool parseCFIOperand(MachineOperand &Dest);
119 bool parseMachineOperand(MachineOperand &Dest);
122 /// Convert the integer literal in the current token into an unsigned integer.
124 /// Return true if an error occurred.
125 bool getUnsigned(unsigned &Result);
127 void initNames2InstrOpCodes();
129 /// Try to convert an instruction name to an opcode. Return true if the
130 /// instruction name is invalid.
131 bool parseInstrName(StringRef InstrName, unsigned &OpCode);
133 bool parseInstruction(unsigned &OpCode, unsigned &Flags);
135 bool verifyImplicitOperands(ArrayRef<MachineOperandWithLocation> Operands,
136 const MCInstrDesc &MCID);
138 void initNames2Regs();
140 /// Try to convert a register name to a register number. Return true if the
141 /// register name is invalid.
142 bool getRegisterByName(StringRef RegName, unsigned &Reg);
144 void initNames2RegMasks();
146 /// Check if the given identifier is a name of a register mask.
148 /// Return null if the identifier isn't a register mask.
149 const uint32_t *getRegMask(StringRef Identifier);
151 void initNames2SubRegIndices();
153 /// Check if the given identifier is a name of a subregister index.
155 /// Return 0 if the name isn't a subregister index class.
156 unsigned getSubRegIndex(StringRef Name);
159 } // end anonymous namespace
161 MIParser::MIParser(SourceMgr &SM, MachineFunction &MF, SMDiagnostic &Error,
162 StringRef Source, const PerFunctionMIParsingState &PFS,
163 const SlotMapping &IRSlots)
164 : SM(SM), MF(MF), Error(Error), Source(Source), CurrentSource(Source),
165 Token(MIToken::Error, StringRef()), PFS(PFS), IRSlots(IRSlots) {}
167 void MIParser::lex() {
168 CurrentSource = lexMIToken(
169 CurrentSource, Token,
170 [this](StringRef::iterator Loc, const Twine &Msg) { error(Loc, Msg); });
173 bool MIParser::error(const Twine &Msg) { return error(Token.location(), Msg); }
175 bool MIParser::error(StringRef::iterator Loc, const Twine &Msg) {
176 assert(Loc >= Source.data() && Loc <= (Source.data() + Source.size()));
177 Error = SMDiagnostic(
179 SM.getMemoryBuffer(SM.getMainFileID())->getBufferIdentifier(), 1,
180 Loc - Source.data(), SourceMgr::DK_Error, Msg.str(), Source, None, None);
184 bool MIParser::parse(MachineInstr *&MI) {
187 // Parse any register operands before '='
188 // TODO: Allow parsing of multiple operands before '='
189 MachineOperand MO = MachineOperand::CreateImm(0);
190 SmallVector<MachineOperandWithLocation, 8> Operands;
191 if (Token.isRegister() || Token.isRegisterFlag()) {
192 auto Loc = Token.location();
193 if (parseRegisterOperand(MO, /*IsDef=*/true))
195 Operands.push_back(MachineOperandWithLocation(MO, Loc, Token.location()));
196 if (Token.isNot(MIToken::equal))
197 return error("expected '='");
201 unsigned OpCode, Flags = 0;
202 if (Token.isError() || parseInstruction(OpCode, Flags))
205 // TODO: Parse the bundle instruction flags and memory operands.
207 // Parse the remaining machine operands.
208 while (Token.isNot(MIToken::Eof) && Token.isNot(MIToken::kw_debug_location)) {
209 auto Loc = Token.location();
210 if (parseMachineOperand(MO))
212 Operands.push_back(MachineOperandWithLocation(MO, Loc, Token.location()));
213 if (Token.is(MIToken::Eof))
215 if (Token.isNot(MIToken::comma))
216 return error("expected ',' before the next machine operand");
220 DebugLoc DebugLocation;
221 if (Token.is(MIToken::kw_debug_location)) {
223 if (Token.isNot(MIToken::exclaim))
224 return error("expected a metadata node after 'debug-location'");
225 MDNode *Node = nullptr;
226 if (parseMDNode(Node))
228 DebugLocation = DebugLoc(Node);
231 const auto &MCID = MF.getSubtarget().getInstrInfo()->get(OpCode);
232 if (!MCID.isVariadic()) {
233 // FIXME: Move the implicit operand verification to the machine verifier.
234 if (verifyImplicitOperands(Operands, MCID))
238 // TODO: Check for extraneous machine operands.
239 MI = MF.CreateMachineInstr(MCID, DebugLocation, /*NoImplicit=*/true);
241 for (const auto &Operand : Operands)
242 MI->addOperand(MF, Operand.Operand);
246 bool MIParser::parseMBB(MachineBasicBlock *&MBB) {
248 if (Token.isNot(MIToken::MachineBasicBlock))
249 return error("expected a machine basic block reference");
250 if (parseMBBReference(MBB))
253 if (Token.isNot(MIToken::Eof))
255 "expected end of string after the machine basic block reference");
259 bool MIParser::parseNamedRegister(unsigned &Reg) {
261 if (Token.isNot(MIToken::NamedRegister))
262 return error("expected a named register");
263 if (parseRegister(Reg))
266 if (Token.isNot(MIToken::Eof))
267 return error("expected end of string after the register reference");
271 static const char *printImplicitRegisterFlag(const MachineOperand &MO) {
272 assert(MO.isImplicit());
273 return MO.isDef() ? "implicit-def" : "implicit";
276 static std::string getRegisterName(const TargetRegisterInfo *TRI,
278 assert(TargetRegisterInfo::isPhysicalRegister(Reg) && "expected phys reg");
279 return StringRef(TRI->getName(Reg)).lower();
282 bool MIParser::verifyImplicitOperands(
283 ArrayRef<MachineOperandWithLocation> Operands, const MCInstrDesc &MCID) {
285 // We can't verify call instructions as they can contain arbitrary implicit
286 // register and register mask operands.
289 // Gather all the expected implicit operands.
290 SmallVector<MachineOperand, 4> ImplicitOperands;
291 if (MCID.ImplicitDefs)
292 for (const uint16_t *ImpDefs = MCID.getImplicitDefs(); *ImpDefs; ++ImpDefs)
293 ImplicitOperands.push_back(
294 MachineOperand::CreateReg(*ImpDefs, true, true));
295 if (MCID.ImplicitUses)
296 for (const uint16_t *ImpUses = MCID.getImplicitUses(); *ImpUses; ++ImpUses)
297 ImplicitOperands.push_back(
298 MachineOperand::CreateReg(*ImpUses, false, true));
300 const auto *TRI = MF.getSubtarget().getRegisterInfo();
301 assert(TRI && "Expected target register info");
302 size_t I = ImplicitOperands.size(), J = Operands.size();
307 const auto &ImplicitOperand = ImplicitOperands[I];
308 const auto &Operand = Operands[J].Operand;
309 if (ImplicitOperand.isIdenticalTo(Operand))
311 if (Operand.isReg() && Operand.isImplicit()) {
312 return error(Operands[J].Begin,
313 Twine("expected an implicit register operand '") +
314 printImplicitRegisterFlag(ImplicitOperand) + " %" +
315 getRegisterName(TRI, ImplicitOperand.getReg()) + "'");
318 // TODO: Fix source location when Operands[J].end is right before '=', i.e:
319 // insead of reporting an error at this location:
322 // report the error at the following location:
325 return error(J < Operands.size() ? Operands[J].End : Token.location(),
326 Twine("missing implicit register operand '") +
327 printImplicitRegisterFlag(ImplicitOperands[I]) + " %" +
328 getRegisterName(TRI, ImplicitOperands[I].getReg()) + "'");
333 bool MIParser::parseInstruction(unsigned &OpCode, unsigned &Flags) {
334 if (Token.is(MIToken::kw_frame_setup)) {
335 Flags |= MachineInstr::FrameSetup;
338 if (Token.isNot(MIToken::Identifier))
339 return error("expected a machine instruction");
340 StringRef InstrName = Token.stringValue();
341 if (parseInstrName(InstrName, OpCode))
342 return error(Twine("unknown machine instruction name '") + InstrName + "'");
347 bool MIParser::parseRegister(unsigned &Reg) {
348 switch (Token.kind()) {
349 case MIToken::underscore:
352 case MIToken::NamedRegister: {
353 StringRef Name = Token.stringValue();
354 if (getRegisterByName(Name, Reg))
355 return error(Twine("unknown register name '") + Name + "'");
358 case MIToken::VirtualRegister: {
362 const auto RegInfo = PFS.VirtualRegisterSlots.find(ID);
363 if (RegInfo == PFS.VirtualRegisterSlots.end())
364 return error(Twine("use of undefined virtual register '%") + Twine(ID) +
366 Reg = RegInfo->second;
369 // TODO: Parse other register kinds.
371 llvm_unreachable("The current token should be a register");
376 bool MIParser::parseRegisterFlag(unsigned &Flags) {
377 switch (Token.kind()) {
378 case MIToken::kw_implicit:
379 Flags |= RegState::Implicit;
381 case MIToken::kw_implicit_define:
382 Flags |= RegState::ImplicitDefine;
384 case MIToken::kw_dead:
385 Flags |= RegState::Dead;
387 case MIToken::kw_killed:
388 Flags |= RegState::Kill;
390 case MIToken::kw_undef:
391 Flags |= RegState::Undef;
393 // TODO: report an error when we specify the same flag more than once.
394 // TODO: parse the other register flags.
396 llvm_unreachable("The current token should be a register flag");
402 bool MIParser::parseSubRegisterIndex(unsigned &SubReg) {
403 assert(Token.is(MIToken::colon));
405 if (Token.isNot(MIToken::Identifier))
406 return error("expected a subregister index after ':'");
407 auto Name = Token.stringValue();
408 SubReg = getSubRegIndex(Name);
410 return error(Twine("use of unknown subregister index '") + Name + "'");
415 bool MIParser::parseRegisterOperand(MachineOperand &Dest, bool IsDef) {
417 unsigned Flags = IsDef ? RegState::Define : 0;
418 while (Token.isRegisterFlag()) {
419 if (parseRegisterFlag(Flags))
422 if (!Token.isRegister())
423 return error("expected a register after register flags");
424 if (parseRegister(Reg))
428 if (Token.is(MIToken::colon)) {
429 if (parseSubRegisterIndex(SubReg))
432 Dest = MachineOperand::CreateReg(
433 Reg, Flags & RegState::Define, Flags & RegState::Implicit,
434 Flags & RegState::Kill, Flags & RegState::Dead, Flags & RegState::Undef,
435 /*isEarlyClobber=*/false, SubReg);
439 bool MIParser::parseImmediateOperand(MachineOperand &Dest) {
440 assert(Token.is(MIToken::IntegerLiteral));
441 const APSInt &Int = Token.integerValue();
442 if (Int.getMinSignedBits() > 64)
443 // TODO: Replace this with an error when we can parse CIMM Machine Operands.
444 llvm_unreachable("Can't parse large integer literals yet!");
445 Dest = MachineOperand::CreateImm(Int.getExtValue());
450 bool MIParser::getUnsigned(unsigned &Result) {
451 assert(Token.hasIntegerValue() && "Expected a token with an integer value");
452 const uint64_t Limit = uint64_t(std::numeric_limits<unsigned>::max()) + 1;
453 uint64_t Val64 = Token.integerValue().getLimitedValue(Limit);
455 return error("expected 32-bit integer (too large)");
460 bool MIParser::parseMBBReference(MachineBasicBlock *&MBB) {
461 assert(Token.is(MIToken::MachineBasicBlock));
463 if (getUnsigned(Number))
465 auto MBBInfo = PFS.MBBSlots.find(Number);
466 if (MBBInfo == PFS.MBBSlots.end())
467 return error(Twine("use of undefined machine basic block #") +
469 MBB = MBBInfo->second;
470 if (!Token.stringValue().empty() && Token.stringValue() != MBB->getName())
471 return error(Twine("the name of machine basic block #") + Twine(Number) +
472 " isn't '" + Token.stringValue() + "'");
476 bool MIParser::parseMBBOperand(MachineOperand &Dest) {
477 MachineBasicBlock *MBB;
478 if (parseMBBReference(MBB))
480 Dest = MachineOperand::CreateMBB(MBB);
485 bool MIParser::parseStackObjectOperand(MachineOperand &Dest) {
486 assert(Token.is(MIToken::StackObject));
490 auto ObjectInfo = PFS.StackObjectSlots.find(ID);
491 if (ObjectInfo == PFS.StackObjectSlots.end())
492 return error(Twine("use of undefined stack object '%stack.") + Twine(ID) +
495 if (const auto *Alloca =
496 MF.getFrameInfo()->getObjectAllocation(ObjectInfo->second))
497 Name = Alloca->getName();
498 if (!Token.stringValue().empty() && Token.stringValue() != Name)
499 return error(Twine("the name of the stack object '%stack.") + Twine(ID) +
500 "' isn't '" + Token.stringValue() + "'");
502 Dest = MachineOperand::CreateFI(ObjectInfo->second);
506 bool MIParser::parseFixedStackObjectOperand(MachineOperand &Dest) {
507 assert(Token.is(MIToken::FixedStackObject));
511 auto ObjectInfo = PFS.FixedStackObjectSlots.find(ID);
512 if (ObjectInfo == PFS.FixedStackObjectSlots.end())
513 return error(Twine("use of undefined fixed stack object '%fixed-stack.") +
516 Dest = MachineOperand::CreateFI(ObjectInfo->second);
520 bool MIParser::parseGlobalAddressOperand(MachineOperand &Dest) {
521 switch (Token.kind()) {
522 case MIToken::NamedGlobalValue:
523 case MIToken::QuotedNamedGlobalValue: {
524 StringValueUtility Name(Token);
525 const Module *M = MF.getFunction()->getParent();
526 if (const auto *GV = M->getNamedValue(Name)) {
527 Dest = MachineOperand::CreateGA(GV, /*Offset=*/0);
530 return error(Twine("use of undefined global value '@") +
531 Token.rawStringValue() + "'");
533 case MIToken::GlobalValue: {
535 if (getUnsigned(GVIdx))
537 if (GVIdx >= IRSlots.GlobalValues.size())
538 return error(Twine("use of undefined global value '@") + Twine(GVIdx) +
540 Dest = MachineOperand::CreateGA(IRSlots.GlobalValues[GVIdx],
545 llvm_unreachable("The current token should be a global value");
547 // TODO: Parse offset and target flags.
552 bool MIParser::parseConstantPoolIndexOperand(MachineOperand &Dest) {
553 assert(Token.is(MIToken::ConstantPoolItem));
557 auto ConstantInfo = PFS.ConstantPoolSlots.find(ID);
558 if (ConstantInfo == PFS.ConstantPoolSlots.end())
559 return error("use of undefined constant '%const." + Twine(ID) + "'");
561 // TODO: Parse offset and target flags.
562 Dest = MachineOperand::CreateCPI(ID, /*Offset=*/0);
566 bool MIParser::parseJumpTableIndexOperand(MachineOperand &Dest) {
567 assert(Token.is(MIToken::JumpTableIndex));
571 auto JumpTableEntryInfo = PFS.JumpTableSlots.find(ID);
572 if (JumpTableEntryInfo == PFS.JumpTableSlots.end())
573 return error("use of undefined jump table '%jump-table." + Twine(ID) + "'");
575 // TODO: Parse target flags.
576 Dest = MachineOperand::CreateJTI(JumpTableEntryInfo->second);
580 bool MIParser::parseExternalSymbolOperand(MachineOperand &Dest) {
581 assert(Token.is(MIToken::ExternalSymbol) ||
582 Token.is(MIToken::QuotedExternalSymbol));
583 StringValueUtility Name(Token);
584 const char *Symbol = MF.createExternalSymbolName(Name);
586 // TODO: Parse the target flags.
587 Dest = MachineOperand::CreateES(Symbol);
591 bool MIParser::parseMDNode(MDNode *&Node) {
592 assert(Token.is(MIToken::exclaim));
593 auto Loc = Token.location();
595 if (Token.isNot(MIToken::IntegerLiteral) || Token.integerValue().isSigned())
596 return error("expected metadata id after '!'");
600 auto NodeInfo = IRSlots.MetadataNodes.find(ID);
601 if (NodeInfo == IRSlots.MetadataNodes.end())
602 return error(Loc, "use of undefined metadata '!" + Twine(ID) + "'");
604 Node = NodeInfo->second.get();
608 bool MIParser::parseMetadataOperand(MachineOperand &Dest) {
609 MDNode *Node = nullptr;
610 if (parseMDNode(Node))
612 Dest = MachineOperand::CreateMetadata(Node);
616 bool MIParser::parseCFIOffset(int &Offset) {
617 if (Token.isNot(MIToken::IntegerLiteral))
618 return error("expected a cfi offset");
619 if (Token.integerValue().getMinSignedBits() > 32)
620 return error("expected a 32 bit integer (the cfi offset is too large)");
621 Offset = (int)Token.integerValue().getExtValue();
626 bool MIParser::parseCFIOperand(MachineOperand &Dest) {
627 // TODO: Parse the other CFI operands.
628 assert(Token.is(MIToken::kw_cfi_def_cfa_offset));
631 if (parseCFIOffset(Offset))
633 // NB: MCCFIInstruction::createDefCfaOffset negates the offset.
634 Dest = MachineOperand::CreateCFIIndex(MF.getMMI().addFrameInst(
635 MCCFIInstruction::createDefCfaOffset(nullptr, -Offset)));
639 bool MIParser::parseMachineOperand(MachineOperand &Dest) {
640 switch (Token.kind()) {
641 case MIToken::kw_implicit:
642 case MIToken::kw_implicit_define:
643 case MIToken::kw_dead:
644 case MIToken::kw_killed:
645 case MIToken::kw_undef:
646 case MIToken::underscore:
647 case MIToken::NamedRegister:
648 case MIToken::VirtualRegister:
649 return parseRegisterOperand(Dest);
650 case MIToken::IntegerLiteral:
651 return parseImmediateOperand(Dest);
652 case MIToken::MachineBasicBlock:
653 return parseMBBOperand(Dest);
654 case MIToken::StackObject:
655 return parseStackObjectOperand(Dest);
656 case MIToken::FixedStackObject:
657 return parseFixedStackObjectOperand(Dest);
658 case MIToken::GlobalValue:
659 case MIToken::NamedGlobalValue:
660 case MIToken::QuotedNamedGlobalValue:
661 return parseGlobalAddressOperand(Dest);
662 case MIToken::ConstantPoolItem:
663 return parseConstantPoolIndexOperand(Dest);
664 case MIToken::JumpTableIndex:
665 return parseJumpTableIndexOperand(Dest);
666 case MIToken::ExternalSymbol:
667 case MIToken::QuotedExternalSymbol:
668 return parseExternalSymbolOperand(Dest);
669 case MIToken::exclaim:
670 return parseMetadataOperand(Dest);
671 case MIToken::kw_cfi_def_cfa_offset:
672 return parseCFIOperand(Dest);
675 case MIToken::Identifier:
676 if (const auto *RegMask = getRegMask(Token.stringValue())) {
677 Dest = MachineOperand::CreateRegMask(RegMask);
683 // TODO: parse the other machine operands.
684 return error("expected a machine operand");
689 void MIParser::initNames2InstrOpCodes() {
690 if (!Names2InstrOpCodes.empty())
692 const auto *TII = MF.getSubtarget().getInstrInfo();
693 assert(TII && "Expected target instruction info");
694 for (unsigned I = 0, E = TII->getNumOpcodes(); I < E; ++I)
695 Names2InstrOpCodes.insert(std::make_pair(StringRef(TII->getName(I)), I));
698 bool MIParser::parseInstrName(StringRef InstrName, unsigned &OpCode) {
699 initNames2InstrOpCodes();
700 auto InstrInfo = Names2InstrOpCodes.find(InstrName);
701 if (InstrInfo == Names2InstrOpCodes.end())
703 OpCode = InstrInfo->getValue();
707 void MIParser::initNames2Regs() {
708 if (!Names2Regs.empty())
710 // The '%noreg' register is the register 0.
711 Names2Regs.insert(std::make_pair("noreg", 0));
712 const auto *TRI = MF.getSubtarget().getRegisterInfo();
713 assert(TRI && "Expected target register info");
714 for (unsigned I = 0, E = TRI->getNumRegs(); I < E; ++I) {
716 Names2Regs.insert(std::make_pair(StringRef(TRI->getName(I)).lower(), I))
719 assert(WasInserted && "Expected registers to be unique case-insensitively");
723 bool MIParser::getRegisterByName(StringRef RegName, unsigned &Reg) {
725 auto RegInfo = Names2Regs.find(RegName);
726 if (RegInfo == Names2Regs.end())
728 Reg = RegInfo->getValue();
732 void MIParser::initNames2RegMasks() {
733 if (!Names2RegMasks.empty())
735 const auto *TRI = MF.getSubtarget().getRegisterInfo();
736 assert(TRI && "Expected target register info");
737 ArrayRef<const uint32_t *> RegMasks = TRI->getRegMasks();
738 ArrayRef<const char *> RegMaskNames = TRI->getRegMaskNames();
739 assert(RegMasks.size() == RegMaskNames.size());
740 for (size_t I = 0, E = RegMasks.size(); I < E; ++I)
741 Names2RegMasks.insert(
742 std::make_pair(StringRef(RegMaskNames[I]).lower(), RegMasks[I]));
745 const uint32_t *MIParser::getRegMask(StringRef Identifier) {
746 initNames2RegMasks();
747 auto RegMaskInfo = Names2RegMasks.find(Identifier);
748 if (RegMaskInfo == Names2RegMasks.end())
750 return RegMaskInfo->getValue();
753 void MIParser::initNames2SubRegIndices() {
754 if (!Names2SubRegIndices.empty())
756 const TargetRegisterInfo *TRI = MF.getSubtarget().getRegisterInfo();
757 for (unsigned I = 1, E = TRI->getNumSubRegIndices(); I < E; ++I)
758 Names2SubRegIndices.insert(
759 std::make_pair(StringRef(TRI->getSubRegIndexName(I)).lower(), I));
762 unsigned MIParser::getSubRegIndex(StringRef Name) {
763 initNames2SubRegIndices();
764 auto SubRegInfo = Names2SubRegIndices.find(Name);
765 if (SubRegInfo == Names2SubRegIndices.end())
767 return SubRegInfo->getValue();
770 bool llvm::parseMachineInstr(MachineInstr *&MI, SourceMgr &SM,
771 MachineFunction &MF, StringRef Src,
772 const PerFunctionMIParsingState &PFS,
773 const SlotMapping &IRSlots, SMDiagnostic &Error) {
774 return MIParser(SM, MF, Error, Src, PFS, IRSlots).parse(MI);
777 bool llvm::parseMBBReference(MachineBasicBlock *&MBB, SourceMgr &SM,
778 MachineFunction &MF, StringRef Src,
779 const PerFunctionMIParsingState &PFS,
780 const SlotMapping &IRSlots, SMDiagnostic &Error) {
781 return MIParser(SM, MF, Error, Src, PFS, IRSlots).parseMBB(MBB);
784 bool llvm::parseNamedRegisterReference(unsigned &Reg, SourceMgr &SM,
785 MachineFunction &MF, StringRef Src,
786 const PerFunctionMIParsingState &PFS,
787 const SlotMapping &IRSlots,
788 SMDiagnostic &Error) {
789 return MIParser(SM, MF, Error, Src, PFS, IRSlots).parseNamedRegister(Reg);