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 parseMetadataOperand(MachineOperand &Dest);
116 bool parseCFIOffset(int &Offset);
117 bool parseCFIOperand(MachineOperand &Dest);
118 bool parseMachineOperand(MachineOperand &Dest);
121 /// Convert the integer literal in the current token into an unsigned integer.
123 /// Return true if an error occurred.
124 bool getUnsigned(unsigned &Result);
126 void initNames2InstrOpCodes();
128 /// Try to convert an instruction name to an opcode. Return true if the
129 /// instruction name is invalid.
130 bool parseInstrName(StringRef InstrName, unsigned &OpCode);
132 bool parseInstruction(unsigned &OpCode, unsigned &Flags);
134 bool verifyImplicitOperands(ArrayRef<MachineOperandWithLocation> Operands,
135 const MCInstrDesc &MCID);
137 void initNames2Regs();
139 /// Try to convert a register name to a register number. Return true if the
140 /// register name is invalid.
141 bool getRegisterByName(StringRef RegName, unsigned &Reg);
143 void initNames2RegMasks();
145 /// Check if the given identifier is a name of a register mask.
147 /// Return null if the identifier isn't a register mask.
148 const uint32_t *getRegMask(StringRef Identifier);
150 void initNames2SubRegIndices();
152 /// Check if the given identifier is a name of a subregister index.
154 /// Return 0 if the name isn't a subregister index class.
155 unsigned getSubRegIndex(StringRef Name);
158 } // end anonymous namespace
160 MIParser::MIParser(SourceMgr &SM, MachineFunction &MF, SMDiagnostic &Error,
161 StringRef Source, const PerFunctionMIParsingState &PFS,
162 const SlotMapping &IRSlots)
163 : SM(SM), MF(MF), Error(Error), Source(Source), CurrentSource(Source),
164 Token(MIToken::Error, StringRef()), PFS(PFS), IRSlots(IRSlots) {}
166 void MIParser::lex() {
167 CurrentSource = lexMIToken(
168 CurrentSource, Token,
169 [this](StringRef::iterator Loc, const Twine &Msg) { error(Loc, Msg); });
172 bool MIParser::error(const Twine &Msg) { return error(Token.location(), Msg); }
174 bool MIParser::error(StringRef::iterator Loc, const Twine &Msg) {
175 assert(Loc >= Source.data() && Loc <= (Source.data() + Source.size()));
176 Error = SMDiagnostic(
178 SM.getMemoryBuffer(SM.getMainFileID())->getBufferIdentifier(), 1,
179 Loc - Source.data(), SourceMgr::DK_Error, Msg.str(), Source, None, None);
183 bool MIParser::parse(MachineInstr *&MI) {
186 // Parse any register operands before '='
187 // TODO: Allow parsing of multiple operands before '='
188 MachineOperand MO = MachineOperand::CreateImm(0);
189 SmallVector<MachineOperandWithLocation, 8> Operands;
190 if (Token.isRegister() || Token.isRegisterFlag()) {
191 auto Loc = Token.location();
192 if (parseRegisterOperand(MO, /*IsDef=*/true))
194 Operands.push_back(MachineOperandWithLocation(MO, Loc, Token.location()));
195 if (Token.isNot(MIToken::equal))
196 return error("expected '='");
200 unsigned OpCode, Flags = 0;
201 if (Token.isError() || parseInstruction(OpCode, Flags))
204 // TODO: Parse the bundle instruction flags and memory operands.
206 // Parse the remaining machine operands.
207 while (Token.isNot(MIToken::Eof)) {
208 auto Loc = Token.location();
209 if (parseMachineOperand(MO))
211 Operands.push_back(MachineOperandWithLocation(MO, Loc, Token.location()));
212 if (Token.is(MIToken::Eof))
214 if (Token.isNot(MIToken::comma))
215 return error("expected ',' before the next machine operand");
219 const auto &MCID = MF.getSubtarget().getInstrInfo()->get(OpCode);
220 if (!MCID.isVariadic()) {
221 // FIXME: Move the implicit operand verification to the machine verifier.
222 if (verifyImplicitOperands(Operands, MCID))
226 // TODO: Check for extraneous machine operands.
227 MI = MF.CreateMachineInstr(MCID, DebugLoc(), /*NoImplicit=*/true);
229 for (const auto &Operand : Operands)
230 MI->addOperand(MF, Operand.Operand);
234 bool MIParser::parseMBB(MachineBasicBlock *&MBB) {
236 if (Token.isNot(MIToken::MachineBasicBlock))
237 return error("expected a machine basic block reference");
238 if (parseMBBReference(MBB))
241 if (Token.isNot(MIToken::Eof))
243 "expected end of string after the machine basic block reference");
247 bool MIParser::parseNamedRegister(unsigned &Reg) {
249 if (Token.isNot(MIToken::NamedRegister))
250 return error("expected a named register");
251 if (parseRegister(Reg))
254 if (Token.isNot(MIToken::Eof))
255 return error("expected end of string after the register reference");
259 static const char *printImplicitRegisterFlag(const MachineOperand &MO) {
260 assert(MO.isImplicit());
261 return MO.isDef() ? "implicit-def" : "implicit";
264 static std::string getRegisterName(const TargetRegisterInfo *TRI,
266 assert(TargetRegisterInfo::isPhysicalRegister(Reg) && "expected phys reg");
267 return StringRef(TRI->getName(Reg)).lower();
270 bool MIParser::verifyImplicitOperands(
271 ArrayRef<MachineOperandWithLocation> Operands, const MCInstrDesc &MCID) {
273 // We can't verify call instructions as they can contain arbitrary implicit
274 // register and register mask operands.
277 // Gather all the expected implicit operands.
278 SmallVector<MachineOperand, 4> ImplicitOperands;
279 if (MCID.ImplicitDefs)
280 for (const uint16_t *ImpDefs = MCID.getImplicitDefs(); *ImpDefs; ++ImpDefs)
281 ImplicitOperands.push_back(
282 MachineOperand::CreateReg(*ImpDefs, true, true));
283 if (MCID.ImplicitUses)
284 for (const uint16_t *ImpUses = MCID.getImplicitUses(); *ImpUses; ++ImpUses)
285 ImplicitOperands.push_back(
286 MachineOperand::CreateReg(*ImpUses, false, true));
288 const auto *TRI = MF.getSubtarget().getRegisterInfo();
289 assert(TRI && "Expected target register info");
290 size_t I = ImplicitOperands.size(), J = Operands.size();
295 const auto &ImplicitOperand = ImplicitOperands[I];
296 const auto &Operand = Operands[J].Operand;
297 if (ImplicitOperand.isIdenticalTo(Operand))
299 if (Operand.isReg() && Operand.isImplicit()) {
300 return error(Operands[J].Begin,
301 Twine("expected an implicit register operand '") +
302 printImplicitRegisterFlag(ImplicitOperand) + " %" +
303 getRegisterName(TRI, ImplicitOperand.getReg()) + "'");
306 // TODO: Fix source location when Operands[J].end is right before '=', i.e:
307 // insead of reporting an error at this location:
310 // report the error at the following location:
313 return error(J < Operands.size() ? Operands[J].End : Token.location(),
314 Twine("missing implicit register operand '") +
315 printImplicitRegisterFlag(ImplicitOperands[I]) + " %" +
316 getRegisterName(TRI, ImplicitOperands[I].getReg()) + "'");
321 bool MIParser::parseInstruction(unsigned &OpCode, unsigned &Flags) {
322 if (Token.is(MIToken::kw_frame_setup)) {
323 Flags |= MachineInstr::FrameSetup;
326 if (Token.isNot(MIToken::Identifier))
327 return error("expected a machine instruction");
328 StringRef InstrName = Token.stringValue();
329 if (parseInstrName(InstrName, OpCode))
330 return error(Twine("unknown machine instruction name '") + InstrName + "'");
335 bool MIParser::parseRegister(unsigned &Reg) {
336 switch (Token.kind()) {
337 case MIToken::underscore:
340 case MIToken::NamedRegister: {
341 StringRef Name = Token.stringValue();
342 if (getRegisterByName(Name, Reg))
343 return error(Twine("unknown register name '") + Name + "'");
346 case MIToken::VirtualRegister: {
350 const auto RegInfo = PFS.VirtualRegisterSlots.find(ID);
351 if (RegInfo == PFS.VirtualRegisterSlots.end())
352 return error(Twine("use of undefined virtual register '%") + Twine(ID) +
354 Reg = RegInfo->second;
357 // TODO: Parse other register kinds.
359 llvm_unreachable("The current token should be a register");
364 bool MIParser::parseRegisterFlag(unsigned &Flags) {
365 switch (Token.kind()) {
366 case MIToken::kw_implicit:
367 Flags |= RegState::Implicit;
369 case MIToken::kw_implicit_define:
370 Flags |= RegState::ImplicitDefine;
372 case MIToken::kw_dead:
373 Flags |= RegState::Dead;
375 case MIToken::kw_killed:
376 Flags |= RegState::Kill;
378 case MIToken::kw_undef:
379 Flags |= RegState::Undef;
381 // TODO: report an error when we specify the same flag more than once.
382 // TODO: parse the other register flags.
384 llvm_unreachable("The current token should be a register flag");
390 bool MIParser::parseSubRegisterIndex(unsigned &SubReg) {
391 assert(Token.is(MIToken::colon));
393 if (Token.isNot(MIToken::Identifier))
394 return error("expected a subregister index after ':'");
395 auto Name = Token.stringValue();
396 SubReg = getSubRegIndex(Name);
398 return error(Twine("use of unknown subregister index '") + Name + "'");
403 bool MIParser::parseRegisterOperand(MachineOperand &Dest, bool IsDef) {
405 unsigned Flags = IsDef ? RegState::Define : 0;
406 while (Token.isRegisterFlag()) {
407 if (parseRegisterFlag(Flags))
410 if (!Token.isRegister())
411 return error("expected a register after register flags");
412 if (parseRegister(Reg))
416 if (Token.is(MIToken::colon)) {
417 if (parseSubRegisterIndex(SubReg))
420 Dest = MachineOperand::CreateReg(
421 Reg, Flags & RegState::Define, Flags & RegState::Implicit,
422 Flags & RegState::Kill, Flags & RegState::Dead, Flags & RegState::Undef,
423 /*isEarlyClobber=*/false, SubReg);
427 bool MIParser::parseImmediateOperand(MachineOperand &Dest) {
428 assert(Token.is(MIToken::IntegerLiteral));
429 const APSInt &Int = Token.integerValue();
430 if (Int.getMinSignedBits() > 64)
431 // TODO: Replace this with an error when we can parse CIMM Machine Operands.
432 llvm_unreachable("Can't parse large integer literals yet!");
433 Dest = MachineOperand::CreateImm(Int.getExtValue());
438 bool MIParser::getUnsigned(unsigned &Result) {
439 assert(Token.hasIntegerValue() && "Expected a token with an integer value");
440 const uint64_t Limit = uint64_t(std::numeric_limits<unsigned>::max()) + 1;
441 uint64_t Val64 = Token.integerValue().getLimitedValue(Limit);
443 return error("expected 32-bit integer (too large)");
448 bool MIParser::parseMBBReference(MachineBasicBlock *&MBB) {
449 assert(Token.is(MIToken::MachineBasicBlock));
451 if (getUnsigned(Number))
453 auto MBBInfo = PFS.MBBSlots.find(Number);
454 if (MBBInfo == PFS.MBBSlots.end())
455 return error(Twine("use of undefined machine basic block #") +
457 MBB = MBBInfo->second;
458 if (!Token.stringValue().empty() && Token.stringValue() != MBB->getName())
459 return error(Twine("the name of machine basic block #") + Twine(Number) +
460 " isn't '" + Token.stringValue() + "'");
464 bool MIParser::parseMBBOperand(MachineOperand &Dest) {
465 MachineBasicBlock *MBB;
466 if (parseMBBReference(MBB))
468 Dest = MachineOperand::CreateMBB(MBB);
473 bool MIParser::parseStackObjectOperand(MachineOperand &Dest) {
474 assert(Token.is(MIToken::StackObject));
478 auto ObjectInfo = PFS.StackObjectSlots.find(ID);
479 if (ObjectInfo == PFS.StackObjectSlots.end())
480 return error(Twine("use of undefined stack object '%stack.") + Twine(ID) +
483 if (const auto *Alloca =
484 MF.getFrameInfo()->getObjectAllocation(ObjectInfo->second))
485 Name = Alloca->getName();
486 if (!Token.stringValue().empty() && Token.stringValue() != Name)
487 return error(Twine("the name of the stack object '%stack.") + Twine(ID) +
488 "' isn't '" + Token.stringValue() + "'");
490 Dest = MachineOperand::CreateFI(ObjectInfo->second);
494 bool MIParser::parseFixedStackObjectOperand(MachineOperand &Dest) {
495 assert(Token.is(MIToken::FixedStackObject));
499 auto ObjectInfo = PFS.FixedStackObjectSlots.find(ID);
500 if (ObjectInfo == PFS.FixedStackObjectSlots.end())
501 return error(Twine("use of undefined fixed stack object '%fixed-stack.") +
504 Dest = MachineOperand::CreateFI(ObjectInfo->second);
508 bool MIParser::parseGlobalAddressOperand(MachineOperand &Dest) {
509 switch (Token.kind()) {
510 case MIToken::NamedGlobalValue:
511 case MIToken::QuotedNamedGlobalValue: {
512 StringValueUtility Name(Token);
513 const Module *M = MF.getFunction()->getParent();
514 if (const auto *GV = M->getNamedValue(Name)) {
515 Dest = MachineOperand::CreateGA(GV, /*Offset=*/0);
518 return error(Twine("use of undefined global value '@") +
519 Token.rawStringValue() + "'");
521 case MIToken::GlobalValue: {
523 if (getUnsigned(GVIdx))
525 if (GVIdx >= IRSlots.GlobalValues.size())
526 return error(Twine("use of undefined global value '@") + Twine(GVIdx) +
528 Dest = MachineOperand::CreateGA(IRSlots.GlobalValues[GVIdx],
533 llvm_unreachable("The current token should be a global value");
535 // TODO: Parse offset and target flags.
540 bool MIParser::parseConstantPoolIndexOperand(MachineOperand &Dest) {
541 assert(Token.is(MIToken::ConstantPoolItem));
545 auto ConstantInfo = PFS.ConstantPoolSlots.find(ID);
546 if (ConstantInfo == PFS.ConstantPoolSlots.end())
547 return error("use of undefined constant '%const." + Twine(ID) + "'");
549 // TODO: Parse offset and target flags.
550 Dest = MachineOperand::CreateCPI(ID, /*Offset=*/0);
554 bool MIParser::parseJumpTableIndexOperand(MachineOperand &Dest) {
555 assert(Token.is(MIToken::JumpTableIndex));
559 auto JumpTableEntryInfo = PFS.JumpTableSlots.find(ID);
560 if (JumpTableEntryInfo == PFS.JumpTableSlots.end())
561 return error("use of undefined jump table '%jump-table." + Twine(ID) + "'");
563 // TODO: Parse target flags.
564 Dest = MachineOperand::CreateJTI(JumpTableEntryInfo->second);
568 bool MIParser::parseExternalSymbolOperand(MachineOperand &Dest) {
569 assert(Token.is(MIToken::ExternalSymbol) ||
570 Token.is(MIToken::QuotedExternalSymbol));
571 StringValueUtility Name(Token);
572 const char *Symbol = MF.createExternalSymbolName(Name);
574 // TODO: Parse the target flags.
575 Dest = MachineOperand::CreateES(Symbol);
579 bool MIParser::parseMetadataOperand(MachineOperand &Dest) {
580 assert(Token.is(MIToken::exclaim));
581 auto Loc = Token.location();
583 if (Token.isNot(MIToken::IntegerLiteral) || Token.integerValue().isSigned())
584 return error("expected metadata id after '!'");
588 auto NodeInfo = IRSlots.MetadataNodes.find(ID);
589 if (NodeInfo == IRSlots.MetadataNodes.end())
590 return error(Loc, "use of undefined metadata '!" + Twine(ID) + "'");
592 Dest = MachineOperand::CreateMetadata(NodeInfo->second.get());
596 bool MIParser::parseCFIOffset(int &Offset) {
597 if (Token.isNot(MIToken::IntegerLiteral))
598 return error("expected a cfi offset");
599 if (Token.integerValue().getMinSignedBits() > 32)
600 return error("expected a 32 bit integer (the cfi offset is too large)");
601 Offset = (int)Token.integerValue().getExtValue();
606 bool MIParser::parseCFIOperand(MachineOperand &Dest) {
607 // TODO: Parse the other CFI operands.
608 assert(Token.is(MIToken::kw_cfi_def_cfa_offset));
611 if (parseCFIOffset(Offset))
613 // NB: MCCFIInstruction::createDefCfaOffset negates the offset.
614 Dest = MachineOperand::CreateCFIIndex(MF.getMMI().addFrameInst(
615 MCCFIInstruction::createDefCfaOffset(nullptr, -Offset)));
619 bool MIParser::parseMachineOperand(MachineOperand &Dest) {
620 switch (Token.kind()) {
621 case MIToken::kw_implicit:
622 case MIToken::kw_implicit_define:
623 case MIToken::kw_dead:
624 case MIToken::kw_killed:
625 case MIToken::kw_undef:
626 case MIToken::underscore:
627 case MIToken::NamedRegister:
628 case MIToken::VirtualRegister:
629 return parseRegisterOperand(Dest);
630 case MIToken::IntegerLiteral:
631 return parseImmediateOperand(Dest);
632 case MIToken::MachineBasicBlock:
633 return parseMBBOperand(Dest);
634 case MIToken::StackObject:
635 return parseStackObjectOperand(Dest);
636 case MIToken::FixedStackObject:
637 return parseFixedStackObjectOperand(Dest);
638 case MIToken::GlobalValue:
639 case MIToken::NamedGlobalValue:
640 case MIToken::QuotedNamedGlobalValue:
641 return parseGlobalAddressOperand(Dest);
642 case MIToken::ConstantPoolItem:
643 return parseConstantPoolIndexOperand(Dest);
644 case MIToken::JumpTableIndex:
645 return parseJumpTableIndexOperand(Dest);
646 case MIToken::ExternalSymbol:
647 case MIToken::QuotedExternalSymbol:
648 return parseExternalSymbolOperand(Dest);
649 case MIToken::exclaim:
650 return parseMetadataOperand(Dest);
651 case MIToken::kw_cfi_def_cfa_offset:
652 return parseCFIOperand(Dest);
655 case MIToken::Identifier:
656 if (const auto *RegMask = getRegMask(Token.stringValue())) {
657 Dest = MachineOperand::CreateRegMask(RegMask);
663 // TODO: parse the other machine operands.
664 return error("expected a machine operand");
669 void MIParser::initNames2InstrOpCodes() {
670 if (!Names2InstrOpCodes.empty())
672 const auto *TII = MF.getSubtarget().getInstrInfo();
673 assert(TII && "Expected target instruction info");
674 for (unsigned I = 0, E = TII->getNumOpcodes(); I < E; ++I)
675 Names2InstrOpCodes.insert(std::make_pair(StringRef(TII->getName(I)), I));
678 bool MIParser::parseInstrName(StringRef InstrName, unsigned &OpCode) {
679 initNames2InstrOpCodes();
680 auto InstrInfo = Names2InstrOpCodes.find(InstrName);
681 if (InstrInfo == Names2InstrOpCodes.end())
683 OpCode = InstrInfo->getValue();
687 void MIParser::initNames2Regs() {
688 if (!Names2Regs.empty())
690 // The '%noreg' register is the register 0.
691 Names2Regs.insert(std::make_pair("noreg", 0));
692 const auto *TRI = MF.getSubtarget().getRegisterInfo();
693 assert(TRI && "Expected target register info");
694 for (unsigned I = 0, E = TRI->getNumRegs(); I < E; ++I) {
696 Names2Regs.insert(std::make_pair(StringRef(TRI->getName(I)).lower(), I))
699 assert(WasInserted && "Expected registers to be unique case-insensitively");
703 bool MIParser::getRegisterByName(StringRef RegName, unsigned &Reg) {
705 auto RegInfo = Names2Regs.find(RegName);
706 if (RegInfo == Names2Regs.end())
708 Reg = RegInfo->getValue();
712 void MIParser::initNames2RegMasks() {
713 if (!Names2RegMasks.empty())
715 const auto *TRI = MF.getSubtarget().getRegisterInfo();
716 assert(TRI && "Expected target register info");
717 ArrayRef<const uint32_t *> RegMasks = TRI->getRegMasks();
718 ArrayRef<const char *> RegMaskNames = TRI->getRegMaskNames();
719 assert(RegMasks.size() == RegMaskNames.size());
720 for (size_t I = 0, E = RegMasks.size(); I < E; ++I)
721 Names2RegMasks.insert(
722 std::make_pair(StringRef(RegMaskNames[I]).lower(), RegMasks[I]));
725 const uint32_t *MIParser::getRegMask(StringRef Identifier) {
726 initNames2RegMasks();
727 auto RegMaskInfo = Names2RegMasks.find(Identifier);
728 if (RegMaskInfo == Names2RegMasks.end())
730 return RegMaskInfo->getValue();
733 void MIParser::initNames2SubRegIndices() {
734 if (!Names2SubRegIndices.empty())
736 const TargetRegisterInfo *TRI = MF.getSubtarget().getRegisterInfo();
737 for (unsigned I = 1, E = TRI->getNumSubRegIndices(); I < E; ++I)
738 Names2SubRegIndices.insert(
739 std::make_pair(StringRef(TRI->getSubRegIndexName(I)).lower(), I));
742 unsigned MIParser::getSubRegIndex(StringRef Name) {
743 initNames2SubRegIndices();
744 auto SubRegInfo = Names2SubRegIndices.find(Name);
745 if (SubRegInfo == Names2SubRegIndices.end())
747 return SubRegInfo->getValue();
750 bool llvm::parseMachineInstr(MachineInstr *&MI, SourceMgr &SM,
751 MachineFunction &MF, StringRef Src,
752 const PerFunctionMIParsingState &PFS,
753 const SlotMapping &IRSlots, SMDiagnostic &Error) {
754 return MIParser(SM, MF, Error, Src, PFS, IRSlots).parse(MI);
757 bool llvm::parseMBBReference(MachineBasicBlock *&MBB, SourceMgr &SM,
758 MachineFunction &MF, StringRef Src,
759 const PerFunctionMIParsingState &PFS,
760 const SlotMapping &IRSlots, SMDiagnostic &Error) {
761 return MIParser(SM, MF, Error, Src, PFS, IRSlots).parseMBB(MBB);
764 bool llvm::parseNamedRegisterReference(unsigned &Reg, SourceMgr &SM,
765 MachineFunction &MF, StringRef Src,
766 const PerFunctionMIParsingState &PFS,
767 const SlotMapping &IRSlots,
768 SMDiagnostic &Error) {
769 return MIParser(SM, MF, Error, Src, PFS, IRSlots).parseNamedRegister(Reg);