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)) {
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 const auto &MCID = MF.getSubtarget().getInstrInfo()->get(OpCode);
221 if (!MCID.isVariadic()) {
222 // FIXME: Move the implicit operand verification to the machine verifier.
223 if (verifyImplicitOperands(Operands, MCID))
227 // TODO: Check for extraneous machine operands.
228 MI = MF.CreateMachineInstr(MCID, DebugLoc(), /*NoImplicit=*/true);
230 for (const auto &Operand : Operands)
231 MI->addOperand(MF, Operand.Operand);
235 bool MIParser::parseMBB(MachineBasicBlock *&MBB) {
237 if (Token.isNot(MIToken::MachineBasicBlock))
238 return error("expected a machine basic block reference");
239 if (parseMBBReference(MBB))
242 if (Token.isNot(MIToken::Eof))
244 "expected end of string after the machine basic block reference");
248 bool MIParser::parseNamedRegister(unsigned &Reg) {
250 if (Token.isNot(MIToken::NamedRegister))
251 return error("expected a named register");
252 if (parseRegister(Reg))
255 if (Token.isNot(MIToken::Eof))
256 return error("expected end of string after the register reference");
260 static const char *printImplicitRegisterFlag(const MachineOperand &MO) {
261 assert(MO.isImplicit());
262 return MO.isDef() ? "implicit-def" : "implicit";
265 static std::string getRegisterName(const TargetRegisterInfo *TRI,
267 assert(TargetRegisterInfo::isPhysicalRegister(Reg) && "expected phys reg");
268 return StringRef(TRI->getName(Reg)).lower();
271 bool MIParser::verifyImplicitOperands(
272 ArrayRef<MachineOperandWithLocation> Operands, const MCInstrDesc &MCID) {
274 // We can't verify call instructions as they can contain arbitrary implicit
275 // register and register mask operands.
278 // Gather all the expected implicit operands.
279 SmallVector<MachineOperand, 4> ImplicitOperands;
280 if (MCID.ImplicitDefs)
281 for (const uint16_t *ImpDefs = MCID.getImplicitDefs(); *ImpDefs; ++ImpDefs)
282 ImplicitOperands.push_back(
283 MachineOperand::CreateReg(*ImpDefs, true, true));
284 if (MCID.ImplicitUses)
285 for (const uint16_t *ImpUses = MCID.getImplicitUses(); *ImpUses; ++ImpUses)
286 ImplicitOperands.push_back(
287 MachineOperand::CreateReg(*ImpUses, false, true));
289 const auto *TRI = MF.getSubtarget().getRegisterInfo();
290 assert(TRI && "Expected target register info");
291 size_t I = ImplicitOperands.size(), J = Operands.size();
296 const auto &ImplicitOperand = ImplicitOperands[I];
297 const auto &Operand = Operands[J].Operand;
298 if (ImplicitOperand.isIdenticalTo(Operand))
300 if (Operand.isReg() && Operand.isImplicit()) {
301 return error(Operands[J].Begin,
302 Twine("expected an implicit register operand '") +
303 printImplicitRegisterFlag(ImplicitOperand) + " %" +
304 getRegisterName(TRI, ImplicitOperand.getReg()) + "'");
307 // TODO: Fix source location when Operands[J].end is right before '=', i.e:
308 // insead of reporting an error at this location:
311 // report the error at the following location:
314 return error(J < Operands.size() ? Operands[J].End : Token.location(),
315 Twine("missing implicit register operand '") +
316 printImplicitRegisterFlag(ImplicitOperands[I]) + " %" +
317 getRegisterName(TRI, ImplicitOperands[I].getReg()) + "'");
322 bool MIParser::parseInstruction(unsigned &OpCode, unsigned &Flags) {
323 if (Token.is(MIToken::kw_frame_setup)) {
324 Flags |= MachineInstr::FrameSetup;
327 if (Token.isNot(MIToken::Identifier))
328 return error("expected a machine instruction");
329 StringRef InstrName = Token.stringValue();
330 if (parseInstrName(InstrName, OpCode))
331 return error(Twine("unknown machine instruction name '") + InstrName + "'");
336 bool MIParser::parseRegister(unsigned &Reg) {
337 switch (Token.kind()) {
338 case MIToken::underscore:
341 case MIToken::NamedRegister: {
342 StringRef Name = Token.stringValue();
343 if (getRegisterByName(Name, Reg))
344 return error(Twine("unknown register name '") + Name + "'");
347 case MIToken::VirtualRegister: {
351 const auto RegInfo = PFS.VirtualRegisterSlots.find(ID);
352 if (RegInfo == PFS.VirtualRegisterSlots.end())
353 return error(Twine("use of undefined virtual register '%") + Twine(ID) +
355 Reg = RegInfo->second;
358 // TODO: Parse other register kinds.
360 llvm_unreachable("The current token should be a register");
365 bool MIParser::parseRegisterFlag(unsigned &Flags) {
366 switch (Token.kind()) {
367 case MIToken::kw_implicit:
368 Flags |= RegState::Implicit;
370 case MIToken::kw_implicit_define:
371 Flags |= RegState::ImplicitDefine;
373 case MIToken::kw_dead:
374 Flags |= RegState::Dead;
376 case MIToken::kw_killed:
377 Flags |= RegState::Kill;
379 case MIToken::kw_undef:
380 Flags |= RegState::Undef;
382 // TODO: report an error when we specify the same flag more than once.
383 // TODO: parse the other register flags.
385 llvm_unreachable("The current token should be a register flag");
391 bool MIParser::parseSubRegisterIndex(unsigned &SubReg) {
392 assert(Token.is(MIToken::colon));
394 if (Token.isNot(MIToken::Identifier))
395 return error("expected a subregister index after ':'");
396 auto Name = Token.stringValue();
397 SubReg = getSubRegIndex(Name);
399 return error(Twine("use of unknown subregister index '") + Name + "'");
404 bool MIParser::parseRegisterOperand(MachineOperand &Dest, bool IsDef) {
406 unsigned Flags = IsDef ? RegState::Define : 0;
407 while (Token.isRegisterFlag()) {
408 if (parseRegisterFlag(Flags))
411 if (!Token.isRegister())
412 return error("expected a register after register flags");
413 if (parseRegister(Reg))
417 if (Token.is(MIToken::colon)) {
418 if (parseSubRegisterIndex(SubReg))
421 Dest = MachineOperand::CreateReg(
422 Reg, Flags & RegState::Define, Flags & RegState::Implicit,
423 Flags & RegState::Kill, Flags & RegState::Dead, Flags & RegState::Undef,
424 /*isEarlyClobber=*/false, SubReg);
428 bool MIParser::parseImmediateOperand(MachineOperand &Dest) {
429 assert(Token.is(MIToken::IntegerLiteral));
430 const APSInt &Int = Token.integerValue();
431 if (Int.getMinSignedBits() > 64)
432 // TODO: Replace this with an error when we can parse CIMM Machine Operands.
433 llvm_unreachable("Can't parse large integer literals yet!");
434 Dest = MachineOperand::CreateImm(Int.getExtValue());
439 bool MIParser::getUnsigned(unsigned &Result) {
440 assert(Token.hasIntegerValue() && "Expected a token with an integer value");
441 const uint64_t Limit = uint64_t(std::numeric_limits<unsigned>::max()) + 1;
442 uint64_t Val64 = Token.integerValue().getLimitedValue(Limit);
444 return error("expected 32-bit integer (too large)");
449 bool MIParser::parseMBBReference(MachineBasicBlock *&MBB) {
450 assert(Token.is(MIToken::MachineBasicBlock));
452 if (getUnsigned(Number))
454 auto MBBInfo = PFS.MBBSlots.find(Number);
455 if (MBBInfo == PFS.MBBSlots.end())
456 return error(Twine("use of undefined machine basic block #") +
458 MBB = MBBInfo->second;
459 if (!Token.stringValue().empty() && Token.stringValue() != MBB->getName())
460 return error(Twine("the name of machine basic block #") + Twine(Number) +
461 " isn't '" + Token.stringValue() + "'");
465 bool MIParser::parseMBBOperand(MachineOperand &Dest) {
466 MachineBasicBlock *MBB;
467 if (parseMBBReference(MBB))
469 Dest = MachineOperand::CreateMBB(MBB);
474 bool MIParser::parseStackObjectOperand(MachineOperand &Dest) {
475 assert(Token.is(MIToken::StackObject));
479 auto ObjectInfo = PFS.StackObjectSlots.find(ID);
480 if (ObjectInfo == PFS.StackObjectSlots.end())
481 return error(Twine("use of undefined stack object '%stack.") + Twine(ID) +
484 if (const auto *Alloca =
485 MF.getFrameInfo()->getObjectAllocation(ObjectInfo->second))
486 Name = Alloca->getName();
487 if (!Token.stringValue().empty() && Token.stringValue() != Name)
488 return error(Twine("the name of the stack object '%stack.") + Twine(ID) +
489 "' isn't '" + Token.stringValue() + "'");
491 Dest = MachineOperand::CreateFI(ObjectInfo->second);
495 bool MIParser::parseFixedStackObjectOperand(MachineOperand &Dest) {
496 assert(Token.is(MIToken::FixedStackObject));
500 auto ObjectInfo = PFS.FixedStackObjectSlots.find(ID);
501 if (ObjectInfo == PFS.FixedStackObjectSlots.end())
502 return error(Twine("use of undefined fixed stack object '%fixed-stack.") +
505 Dest = MachineOperand::CreateFI(ObjectInfo->second);
509 bool MIParser::parseGlobalAddressOperand(MachineOperand &Dest) {
510 switch (Token.kind()) {
511 case MIToken::NamedGlobalValue:
512 case MIToken::QuotedNamedGlobalValue: {
513 StringValueUtility Name(Token);
514 const Module *M = MF.getFunction()->getParent();
515 if (const auto *GV = M->getNamedValue(Name)) {
516 Dest = MachineOperand::CreateGA(GV, /*Offset=*/0);
519 return error(Twine("use of undefined global value '@") +
520 Token.rawStringValue() + "'");
522 case MIToken::GlobalValue: {
524 if (getUnsigned(GVIdx))
526 if (GVIdx >= IRSlots.GlobalValues.size())
527 return error(Twine("use of undefined global value '@") + Twine(GVIdx) +
529 Dest = MachineOperand::CreateGA(IRSlots.GlobalValues[GVIdx],
534 llvm_unreachable("The current token should be a global value");
536 // TODO: Parse offset and target flags.
541 bool MIParser::parseConstantPoolIndexOperand(MachineOperand &Dest) {
542 assert(Token.is(MIToken::ConstantPoolItem));
546 auto ConstantInfo = PFS.ConstantPoolSlots.find(ID);
547 if (ConstantInfo == PFS.ConstantPoolSlots.end())
548 return error("use of undefined constant '%const." + Twine(ID) + "'");
550 // TODO: Parse offset and target flags.
551 Dest = MachineOperand::CreateCPI(ID, /*Offset=*/0);
555 bool MIParser::parseJumpTableIndexOperand(MachineOperand &Dest) {
556 assert(Token.is(MIToken::JumpTableIndex));
560 auto JumpTableEntryInfo = PFS.JumpTableSlots.find(ID);
561 if (JumpTableEntryInfo == PFS.JumpTableSlots.end())
562 return error("use of undefined jump table '%jump-table." + Twine(ID) + "'");
564 // TODO: Parse target flags.
565 Dest = MachineOperand::CreateJTI(JumpTableEntryInfo->second);
569 bool MIParser::parseExternalSymbolOperand(MachineOperand &Dest) {
570 assert(Token.is(MIToken::ExternalSymbol) ||
571 Token.is(MIToken::QuotedExternalSymbol));
572 StringValueUtility Name(Token);
573 const char *Symbol = MF.createExternalSymbolName(Name);
575 // TODO: Parse the target flags.
576 Dest = MachineOperand::CreateES(Symbol);
580 bool MIParser::parseMDNode(MDNode *&Node) {
581 assert(Token.is(MIToken::exclaim));
582 auto Loc = Token.location();
584 if (Token.isNot(MIToken::IntegerLiteral) || Token.integerValue().isSigned())
585 return error("expected metadata id after '!'");
589 auto NodeInfo = IRSlots.MetadataNodes.find(ID);
590 if (NodeInfo == IRSlots.MetadataNodes.end())
591 return error(Loc, "use of undefined metadata '!" + Twine(ID) + "'");
593 Node = NodeInfo->second.get();
597 bool MIParser::parseMetadataOperand(MachineOperand &Dest) {
598 MDNode *Node = nullptr;
599 if (parseMDNode(Node))
601 Dest = MachineOperand::CreateMetadata(Node);
605 bool MIParser::parseCFIOffset(int &Offset) {
606 if (Token.isNot(MIToken::IntegerLiteral))
607 return error("expected a cfi offset");
608 if (Token.integerValue().getMinSignedBits() > 32)
609 return error("expected a 32 bit integer (the cfi offset is too large)");
610 Offset = (int)Token.integerValue().getExtValue();
615 bool MIParser::parseCFIOperand(MachineOperand &Dest) {
616 // TODO: Parse the other CFI operands.
617 assert(Token.is(MIToken::kw_cfi_def_cfa_offset));
620 if (parseCFIOffset(Offset))
622 // NB: MCCFIInstruction::createDefCfaOffset negates the offset.
623 Dest = MachineOperand::CreateCFIIndex(MF.getMMI().addFrameInst(
624 MCCFIInstruction::createDefCfaOffset(nullptr, -Offset)));
628 bool MIParser::parseMachineOperand(MachineOperand &Dest) {
629 switch (Token.kind()) {
630 case MIToken::kw_implicit:
631 case MIToken::kw_implicit_define:
632 case MIToken::kw_dead:
633 case MIToken::kw_killed:
634 case MIToken::kw_undef:
635 case MIToken::underscore:
636 case MIToken::NamedRegister:
637 case MIToken::VirtualRegister:
638 return parseRegisterOperand(Dest);
639 case MIToken::IntegerLiteral:
640 return parseImmediateOperand(Dest);
641 case MIToken::MachineBasicBlock:
642 return parseMBBOperand(Dest);
643 case MIToken::StackObject:
644 return parseStackObjectOperand(Dest);
645 case MIToken::FixedStackObject:
646 return parseFixedStackObjectOperand(Dest);
647 case MIToken::GlobalValue:
648 case MIToken::NamedGlobalValue:
649 case MIToken::QuotedNamedGlobalValue:
650 return parseGlobalAddressOperand(Dest);
651 case MIToken::ConstantPoolItem:
652 return parseConstantPoolIndexOperand(Dest);
653 case MIToken::JumpTableIndex:
654 return parseJumpTableIndexOperand(Dest);
655 case MIToken::ExternalSymbol:
656 case MIToken::QuotedExternalSymbol:
657 return parseExternalSymbolOperand(Dest);
658 case MIToken::exclaim:
659 return parseMetadataOperand(Dest);
660 case MIToken::kw_cfi_def_cfa_offset:
661 return parseCFIOperand(Dest);
664 case MIToken::Identifier:
665 if (const auto *RegMask = getRegMask(Token.stringValue())) {
666 Dest = MachineOperand::CreateRegMask(RegMask);
672 // TODO: parse the other machine operands.
673 return error("expected a machine operand");
678 void MIParser::initNames2InstrOpCodes() {
679 if (!Names2InstrOpCodes.empty())
681 const auto *TII = MF.getSubtarget().getInstrInfo();
682 assert(TII && "Expected target instruction info");
683 for (unsigned I = 0, E = TII->getNumOpcodes(); I < E; ++I)
684 Names2InstrOpCodes.insert(std::make_pair(StringRef(TII->getName(I)), I));
687 bool MIParser::parseInstrName(StringRef InstrName, unsigned &OpCode) {
688 initNames2InstrOpCodes();
689 auto InstrInfo = Names2InstrOpCodes.find(InstrName);
690 if (InstrInfo == Names2InstrOpCodes.end())
692 OpCode = InstrInfo->getValue();
696 void MIParser::initNames2Regs() {
697 if (!Names2Regs.empty())
699 // The '%noreg' register is the register 0.
700 Names2Regs.insert(std::make_pair("noreg", 0));
701 const auto *TRI = MF.getSubtarget().getRegisterInfo();
702 assert(TRI && "Expected target register info");
703 for (unsigned I = 0, E = TRI->getNumRegs(); I < E; ++I) {
705 Names2Regs.insert(std::make_pair(StringRef(TRI->getName(I)).lower(), I))
708 assert(WasInserted && "Expected registers to be unique case-insensitively");
712 bool MIParser::getRegisterByName(StringRef RegName, unsigned &Reg) {
714 auto RegInfo = Names2Regs.find(RegName);
715 if (RegInfo == Names2Regs.end())
717 Reg = RegInfo->getValue();
721 void MIParser::initNames2RegMasks() {
722 if (!Names2RegMasks.empty())
724 const auto *TRI = MF.getSubtarget().getRegisterInfo();
725 assert(TRI && "Expected target register info");
726 ArrayRef<const uint32_t *> RegMasks = TRI->getRegMasks();
727 ArrayRef<const char *> RegMaskNames = TRI->getRegMaskNames();
728 assert(RegMasks.size() == RegMaskNames.size());
729 for (size_t I = 0, E = RegMasks.size(); I < E; ++I)
730 Names2RegMasks.insert(
731 std::make_pair(StringRef(RegMaskNames[I]).lower(), RegMasks[I]));
734 const uint32_t *MIParser::getRegMask(StringRef Identifier) {
735 initNames2RegMasks();
736 auto RegMaskInfo = Names2RegMasks.find(Identifier);
737 if (RegMaskInfo == Names2RegMasks.end())
739 return RegMaskInfo->getValue();
742 void MIParser::initNames2SubRegIndices() {
743 if (!Names2SubRegIndices.empty())
745 const TargetRegisterInfo *TRI = MF.getSubtarget().getRegisterInfo();
746 for (unsigned I = 1, E = TRI->getNumSubRegIndices(); I < E; ++I)
747 Names2SubRegIndices.insert(
748 std::make_pair(StringRef(TRI->getSubRegIndexName(I)).lower(), I));
751 unsigned MIParser::getSubRegIndex(StringRef Name) {
752 initNames2SubRegIndices();
753 auto SubRegInfo = Names2SubRegIndices.find(Name);
754 if (SubRegInfo == Names2SubRegIndices.end())
756 return SubRegInfo->getValue();
759 bool llvm::parseMachineInstr(MachineInstr *&MI, SourceMgr &SM,
760 MachineFunction &MF, StringRef Src,
761 const PerFunctionMIParsingState &PFS,
762 const SlotMapping &IRSlots, SMDiagnostic &Error) {
763 return MIParser(SM, MF, Error, Src, PFS, IRSlots).parse(MI);
766 bool llvm::parseMBBReference(MachineBasicBlock *&MBB, SourceMgr &SM,
767 MachineFunction &MF, StringRef Src,
768 const PerFunctionMIParsingState &PFS,
769 const SlotMapping &IRSlots, SMDiagnostic &Error) {
770 return MIParser(SM, MF, Error, Src, PFS, IRSlots).parseMBB(MBB);
773 bool llvm::parseNamedRegisterReference(unsigned &Reg, SourceMgr &SM,
774 MachineFunction &MF, StringRef Src,
775 const PerFunctionMIParsingState &PFS,
776 const SlotMapping &IRSlots,
777 SMDiagnostic &Error) {
778 return MIParser(SM, MF, Error, Src, PFS, IRSlots).parseNamedRegister(Reg);