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 parseCFIRegister(unsigned &Reg);
119 bool parseCFIOperand(MachineOperand &Dest);
120 bool parseMachineOperand(MachineOperand &Dest);
123 /// Convert the integer literal in the current token into an unsigned integer.
125 /// Return true if an error occurred.
126 bool getUnsigned(unsigned &Result);
128 /// If the current token is of the given kind, consume it and return false.
129 /// Otherwise report an error and return true.
130 bool expectAndConsume(MIToken::TokenKind TokenKind);
132 void initNames2InstrOpCodes();
134 /// Try to convert an instruction name to an opcode. Return true if the
135 /// instruction name is invalid.
136 bool parseInstrName(StringRef InstrName, unsigned &OpCode);
138 bool parseInstruction(unsigned &OpCode, unsigned &Flags);
140 bool verifyImplicitOperands(ArrayRef<MachineOperandWithLocation> Operands,
141 const MCInstrDesc &MCID);
143 void initNames2Regs();
145 /// Try to convert a register name to a register number. Return true if the
146 /// register name is invalid.
147 bool getRegisterByName(StringRef RegName, unsigned &Reg);
149 void initNames2RegMasks();
151 /// Check if the given identifier is a name of a register mask.
153 /// Return null if the identifier isn't a register mask.
154 const uint32_t *getRegMask(StringRef Identifier);
156 void initNames2SubRegIndices();
158 /// Check if the given identifier is a name of a subregister index.
160 /// Return 0 if the name isn't a subregister index class.
161 unsigned getSubRegIndex(StringRef Name);
164 } // end anonymous namespace
166 MIParser::MIParser(SourceMgr &SM, MachineFunction &MF, SMDiagnostic &Error,
167 StringRef Source, const PerFunctionMIParsingState &PFS,
168 const SlotMapping &IRSlots)
169 : SM(SM), MF(MF), Error(Error), Source(Source), CurrentSource(Source),
170 Token(MIToken::Error, StringRef()), PFS(PFS), IRSlots(IRSlots) {}
172 void MIParser::lex() {
173 CurrentSource = lexMIToken(
174 CurrentSource, Token,
175 [this](StringRef::iterator Loc, const Twine &Msg) { error(Loc, Msg); });
178 bool MIParser::error(const Twine &Msg) { return error(Token.location(), Msg); }
180 bool MIParser::error(StringRef::iterator Loc, const Twine &Msg) {
181 assert(Loc >= Source.data() && Loc <= (Source.data() + Source.size()));
182 Error = SMDiagnostic(
184 SM.getMemoryBuffer(SM.getMainFileID())->getBufferIdentifier(), 1,
185 Loc - Source.data(), SourceMgr::DK_Error, Msg.str(), Source, None, None);
189 static const char *toString(MIToken::TokenKind TokenKind) {
194 return "<unknown token>";
198 bool MIParser::expectAndConsume(MIToken::TokenKind TokenKind) {
199 if (Token.isNot(TokenKind))
200 return error(Twine("expected ") + toString(TokenKind));
205 bool MIParser::parse(MachineInstr *&MI) {
208 // Parse any register operands before '='
209 // TODO: Allow parsing of multiple operands before '='
210 MachineOperand MO = MachineOperand::CreateImm(0);
211 SmallVector<MachineOperandWithLocation, 8> Operands;
212 if (Token.isRegister() || Token.isRegisterFlag()) {
213 auto Loc = Token.location();
214 if (parseRegisterOperand(MO, /*IsDef=*/true))
216 Operands.push_back(MachineOperandWithLocation(MO, Loc, Token.location()));
217 if (Token.isNot(MIToken::equal))
218 return error("expected '='");
222 unsigned OpCode, Flags = 0;
223 if (Token.isError() || parseInstruction(OpCode, Flags))
226 // TODO: Parse the bundle instruction flags and memory operands.
228 // Parse the remaining machine operands.
229 while (Token.isNot(MIToken::Eof) && Token.isNot(MIToken::kw_debug_location)) {
230 auto Loc = Token.location();
231 if (parseMachineOperand(MO))
233 Operands.push_back(MachineOperandWithLocation(MO, Loc, Token.location()));
234 if (Token.is(MIToken::Eof))
236 if (Token.isNot(MIToken::comma))
237 return error("expected ',' before the next machine operand");
241 DebugLoc DebugLocation;
242 if (Token.is(MIToken::kw_debug_location)) {
244 if (Token.isNot(MIToken::exclaim))
245 return error("expected a metadata node after 'debug-location'");
246 MDNode *Node = nullptr;
247 if (parseMDNode(Node))
249 DebugLocation = DebugLoc(Node);
252 const auto &MCID = MF.getSubtarget().getInstrInfo()->get(OpCode);
253 if (!MCID.isVariadic()) {
254 // FIXME: Move the implicit operand verification to the machine verifier.
255 if (verifyImplicitOperands(Operands, MCID))
259 // TODO: Check for extraneous machine operands.
260 MI = MF.CreateMachineInstr(MCID, DebugLocation, /*NoImplicit=*/true);
262 for (const auto &Operand : Operands)
263 MI->addOperand(MF, Operand.Operand);
267 bool MIParser::parseMBB(MachineBasicBlock *&MBB) {
269 if (Token.isNot(MIToken::MachineBasicBlock))
270 return error("expected a machine basic block reference");
271 if (parseMBBReference(MBB))
274 if (Token.isNot(MIToken::Eof))
276 "expected end of string after the machine basic block reference");
280 bool MIParser::parseNamedRegister(unsigned &Reg) {
282 if (Token.isNot(MIToken::NamedRegister))
283 return error("expected a named register");
284 if (parseRegister(Reg))
287 if (Token.isNot(MIToken::Eof))
288 return error("expected end of string after the register reference");
292 static const char *printImplicitRegisterFlag(const MachineOperand &MO) {
293 assert(MO.isImplicit());
294 return MO.isDef() ? "implicit-def" : "implicit";
297 static std::string getRegisterName(const TargetRegisterInfo *TRI,
299 assert(TargetRegisterInfo::isPhysicalRegister(Reg) && "expected phys reg");
300 return StringRef(TRI->getName(Reg)).lower();
303 bool MIParser::verifyImplicitOperands(
304 ArrayRef<MachineOperandWithLocation> Operands, const MCInstrDesc &MCID) {
306 // We can't verify call instructions as they can contain arbitrary implicit
307 // register and register mask operands.
310 // Gather all the expected implicit operands.
311 SmallVector<MachineOperand, 4> ImplicitOperands;
312 if (MCID.ImplicitDefs)
313 for (const uint16_t *ImpDefs = MCID.getImplicitDefs(); *ImpDefs; ++ImpDefs)
314 ImplicitOperands.push_back(
315 MachineOperand::CreateReg(*ImpDefs, true, true));
316 if (MCID.ImplicitUses)
317 for (const uint16_t *ImpUses = MCID.getImplicitUses(); *ImpUses; ++ImpUses)
318 ImplicitOperands.push_back(
319 MachineOperand::CreateReg(*ImpUses, false, true));
321 const auto *TRI = MF.getSubtarget().getRegisterInfo();
322 assert(TRI && "Expected target register info");
323 size_t I = ImplicitOperands.size(), J = Operands.size();
328 const auto &ImplicitOperand = ImplicitOperands[I];
329 const auto &Operand = Operands[J].Operand;
330 if (ImplicitOperand.isIdenticalTo(Operand))
332 if (Operand.isReg() && Operand.isImplicit()) {
333 return error(Operands[J].Begin,
334 Twine("expected an implicit register operand '") +
335 printImplicitRegisterFlag(ImplicitOperand) + " %" +
336 getRegisterName(TRI, ImplicitOperand.getReg()) + "'");
339 // TODO: Fix source location when Operands[J].end is right before '=', i.e:
340 // insead of reporting an error at this location:
343 // report the error at the following location:
346 return error(J < Operands.size() ? Operands[J].End : Token.location(),
347 Twine("missing implicit register operand '") +
348 printImplicitRegisterFlag(ImplicitOperands[I]) + " %" +
349 getRegisterName(TRI, ImplicitOperands[I].getReg()) + "'");
354 bool MIParser::parseInstruction(unsigned &OpCode, unsigned &Flags) {
355 if (Token.is(MIToken::kw_frame_setup)) {
356 Flags |= MachineInstr::FrameSetup;
359 if (Token.isNot(MIToken::Identifier))
360 return error("expected a machine instruction");
361 StringRef InstrName = Token.stringValue();
362 if (parseInstrName(InstrName, OpCode))
363 return error(Twine("unknown machine instruction name '") + InstrName + "'");
368 bool MIParser::parseRegister(unsigned &Reg) {
369 switch (Token.kind()) {
370 case MIToken::underscore:
373 case MIToken::NamedRegister: {
374 StringRef Name = Token.stringValue();
375 if (getRegisterByName(Name, Reg))
376 return error(Twine("unknown register name '") + Name + "'");
379 case MIToken::VirtualRegister: {
383 const auto RegInfo = PFS.VirtualRegisterSlots.find(ID);
384 if (RegInfo == PFS.VirtualRegisterSlots.end())
385 return error(Twine("use of undefined virtual register '%") + Twine(ID) +
387 Reg = RegInfo->second;
390 // TODO: Parse other register kinds.
392 llvm_unreachable("The current token should be a register");
397 bool MIParser::parseRegisterFlag(unsigned &Flags) {
398 switch (Token.kind()) {
399 case MIToken::kw_implicit:
400 Flags |= RegState::Implicit;
402 case MIToken::kw_implicit_define:
403 Flags |= RegState::ImplicitDefine;
405 case MIToken::kw_dead:
406 Flags |= RegState::Dead;
408 case MIToken::kw_killed:
409 Flags |= RegState::Kill;
411 case MIToken::kw_undef:
412 Flags |= RegState::Undef;
414 // TODO: report an error when we specify the same flag more than once.
415 // TODO: parse the other register flags.
417 llvm_unreachable("The current token should be a register flag");
423 bool MIParser::parseSubRegisterIndex(unsigned &SubReg) {
424 assert(Token.is(MIToken::colon));
426 if (Token.isNot(MIToken::Identifier))
427 return error("expected a subregister index after ':'");
428 auto Name = Token.stringValue();
429 SubReg = getSubRegIndex(Name);
431 return error(Twine("use of unknown subregister index '") + Name + "'");
436 bool MIParser::parseRegisterOperand(MachineOperand &Dest, bool IsDef) {
438 unsigned Flags = IsDef ? RegState::Define : 0;
439 while (Token.isRegisterFlag()) {
440 if (parseRegisterFlag(Flags))
443 if (!Token.isRegister())
444 return error("expected a register after register flags");
445 if (parseRegister(Reg))
449 if (Token.is(MIToken::colon)) {
450 if (parseSubRegisterIndex(SubReg))
453 Dest = MachineOperand::CreateReg(
454 Reg, Flags & RegState::Define, Flags & RegState::Implicit,
455 Flags & RegState::Kill, Flags & RegState::Dead, Flags & RegState::Undef,
456 /*isEarlyClobber=*/false, SubReg);
460 bool MIParser::parseImmediateOperand(MachineOperand &Dest) {
461 assert(Token.is(MIToken::IntegerLiteral));
462 const APSInt &Int = Token.integerValue();
463 if (Int.getMinSignedBits() > 64)
464 // TODO: Replace this with an error when we can parse CIMM Machine Operands.
465 llvm_unreachable("Can't parse large integer literals yet!");
466 Dest = MachineOperand::CreateImm(Int.getExtValue());
471 bool MIParser::getUnsigned(unsigned &Result) {
472 assert(Token.hasIntegerValue() && "Expected a token with an integer value");
473 const uint64_t Limit = uint64_t(std::numeric_limits<unsigned>::max()) + 1;
474 uint64_t Val64 = Token.integerValue().getLimitedValue(Limit);
476 return error("expected 32-bit integer (too large)");
481 bool MIParser::parseMBBReference(MachineBasicBlock *&MBB) {
482 assert(Token.is(MIToken::MachineBasicBlock));
484 if (getUnsigned(Number))
486 auto MBBInfo = PFS.MBBSlots.find(Number);
487 if (MBBInfo == PFS.MBBSlots.end())
488 return error(Twine("use of undefined machine basic block #") +
490 MBB = MBBInfo->second;
491 if (!Token.stringValue().empty() && Token.stringValue() != MBB->getName())
492 return error(Twine("the name of machine basic block #") + Twine(Number) +
493 " isn't '" + Token.stringValue() + "'");
497 bool MIParser::parseMBBOperand(MachineOperand &Dest) {
498 MachineBasicBlock *MBB;
499 if (parseMBBReference(MBB))
501 Dest = MachineOperand::CreateMBB(MBB);
506 bool MIParser::parseStackObjectOperand(MachineOperand &Dest) {
507 assert(Token.is(MIToken::StackObject));
511 auto ObjectInfo = PFS.StackObjectSlots.find(ID);
512 if (ObjectInfo == PFS.StackObjectSlots.end())
513 return error(Twine("use of undefined stack object '%stack.") + Twine(ID) +
516 if (const auto *Alloca =
517 MF.getFrameInfo()->getObjectAllocation(ObjectInfo->second))
518 Name = Alloca->getName();
519 if (!Token.stringValue().empty() && Token.stringValue() != Name)
520 return error(Twine("the name of the stack object '%stack.") + Twine(ID) +
521 "' isn't '" + Token.stringValue() + "'");
523 Dest = MachineOperand::CreateFI(ObjectInfo->second);
527 bool MIParser::parseFixedStackObjectOperand(MachineOperand &Dest) {
528 assert(Token.is(MIToken::FixedStackObject));
532 auto ObjectInfo = PFS.FixedStackObjectSlots.find(ID);
533 if (ObjectInfo == PFS.FixedStackObjectSlots.end())
534 return error(Twine("use of undefined fixed stack object '%fixed-stack.") +
537 Dest = MachineOperand::CreateFI(ObjectInfo->second);
541 bool MIParser::parseGlobalAddressOperand(MachineOperand &Dest) {
542 switch (Token.kind()) {
543 case MIToken::NamedGlobalValue:
544 case MIToken::QuotedNamedGlobalValue: {
545 StringValueUtility Name(Token);
546 const Module *M = MF.getFunction()->getParent();
547 if (const auto *GV = M->getNamedValue(Name)) {
548 Dest = MachineOperand::CreateGA(GV, /*Offset=*/0);
551 return error(Twine("use of undefined global value '@") +
552 Token.rawStringValue() + "'");
554 case MIToken::GlobalValue: {
556 if (getUnsigned(GVIdx))
558 if (GVIdx >= IRSlots.GlobalValues.size())
559 return error(Twine("use of undefined global value '@") + Twine(GVIdx) +
561 Dest = MachineOperand::CreateGA(IRSlots.GlobalValues[GVIdx],
566 llvm_unreachable("The current token should be a global value");
568 // TODO: Parse offset and target flags.
573 bool MIParser::parseConstantPoolIndexOperand(MachineOperand &Dest) {
574 assert(Token.is(MIToken::ConstantPoolItem));
578 auto ConstantInfo = PFS.ConstantPoolSlots.find(ID);
579 if (ConstantInfo == PFS.ConstantPoolSlots.end())
580 return error("use of undefined constant '%const." + Twine(ID) + "'");
582 // TODO: Parse offset and target flags.
583 Dest = MachineOperand::CreateCPI(ID, /*Offset=*/0);
587 bool MIParser::parseJumpTableIndexOperand(MachineOperand &Dest) {
588 assert(Token.is(MIToken::JumpTableIndex));
592 auto JumpTableEntryInfo = PFS.JumpTableSlots.find(ID);
593 if (JumpTableEntryInfo == PFS.JumpTableSlots.end())
594 return error("use of undefined jump table '%jump-table." + Twine(ID) + "'");
596 // TODO: Parse target flags.
597 Dest = MachineOperand::CreateJTI(JumpTableEntryInfo->second);
601 bool MIParser::parseExternalSymbolOperand(MachineOperand &Dest) {
602 assert(Token.is(MIToken::ExternalSymbol) ||
603 Token.is(MIToken::QuotedExternalSymbol));
604 StringValueUtility Name(Token);
605 const char *Symbol = MF.createExternalSymbolName(Name);
607 // TODO: Parse the target flags.
608 Dest = MachineOperand::CreateES(Symbol);
612 bool MIParser::parseMDNode(MDNode *&Node) {
613 assert(Token.is(MIToken::exclaim));
614 auto Loc = Token.location();
616 if (Token.isNot(MIToken::IntegerLiteral) || Token.integerValue().isSigned())
617 return error("expected metadata id after '!'");
621 auto NodeInfo = IRSlots.MetadataNodes.find(ID);
622 if (NodeInfo == IRSlots.MetadataNodes.end())
623 return error(Loc, "use of undefined metadata '!" + Twine(ID) + "'");
625 Node = NodeInfo->second.get();
629 bool MIParser::parseMetadataOperand(MachineOperand &Dest) {
630 MDNode *Node = nullptr;
631 if (parseMDNode(Node))
633 Dest = MachineOperand::CreateMetadata(Node);
637 bool MIParser::parseCFIOffset(int &Offset) {
638 if (Token.isNot(MIToken::IntegerLiteral))
639 return error("expected a cfi offset");
640 if (Token.integerValue().getMinSignedBits() > 32)
641 return error("expected a 32 bit integer (the cfi offset is too large)");
642 Offset = (int)Token.integerValue().getExtValue();
647 bool MIParser::parseCFIRegister(unsigned &Reg) {
648 if (Token.isNot(MIToken::NamedRegister))
649 return error("expected a cfi register");
651 if (parseRegister(LLVMReg))
653 const auto *TRI = MF.getSubtarget().getRegisterInfo();
654 assert(TRI && "Expected target register info");
655 int DwarfReg = TRI->getDwarfRegNum(LLVMReg, true);
657 return error("invalid DWARF register");
658 Reg = (unsigned)DwarfReg;
663 bool MIParser::parseCFIOperand(MachineOperand &Dest) {
664 auto Kind = Token.kind();
666 auto &MMI = MF.getMMI();
671 case MIToken::kw_cfi_offset:
672 if (parseCFIRegister(Reg) || expectAndConsume(MIToken::comma) ||
673 parseCFIOffset(Offset))
676 MMI.addFrameInst(MCCFIInstruction::createOffset(nullptr, Reg, Offset));
678 case MIToken::kw_cfi_def_cfa_offset:
679 if (parseCFIOffset(Offset))
681 // NB: MCCFIInstruction::createDefCfaOffset negates the offset.
682 CFIIndex = MMI.addFrameInst(
683 MCCFIInstruction::createDefCfaOffset(nullptr, -Offset));
686 // TODO: Parse the other CFI operands.
687 llvm_unreachable("The current token should be a cfi operand");
689 Dest = MachineOperand::CreateCFIIndex(CFIIndex);
693 bool MIParser::parseMachineOperand(MachineOperand &Dest) {
694 switch (Token.kind()) {
695 case MIToken::kw_implicit:
696 case MIToken::kw_implicit_define:
697 case MIToken::kw_dead:
698 case MIToken::kw_killed:
699 case MIToken::kw_undef:
700 case MIToken::underscore:
701 case MIToken::NamedRegister:
702 case MIToken::VirtualRegister:
703 return parseRegisterOperand(Dest);
704 case MIToken::IntegerLiteral:
705 return parseImmediateOperand(Dest);
706 case MIToken::MachineBasicBlock:
707 return parseMBBOperand(Dest);
708 case MIToken::StackObject:
709 return parseStackObjectOperand(Dest);
710 case MIToken::FixedStackObject:
711 return parseFixedStackObjectOperand(Dest);
712 case MIToken::GlobalValue:
713 case MIToken::NamedGlobalValue:
714 case MIToken::QuotedNamedGlobalValue:
715 return parseGlobalAddressOperand(Dest);
716 case MIToken::ConstantPoolItem:
717 return parseConstantPoolIndexOperand(Dest);
718 case MIToken::JumpTableIndex:
719 return parseJumpTableIndexOperand(Dest);
720 case MIToken::ExternalSymbol:
721 case MIToken::QuotedExternalSymbol:
722 return parseExternalSymbolOperand(Dest);
723 case MIToken::exclaim:
724 return parseMetadataOperand(Dest);
725 case MIToken::kw_cfi_offset:
726 case MIToken::kw_cfi_def_cfa_offset:
727 return parseCFIOperand(Dest);
730 case MIToken::Identifier:
731 if (const auto *RegMask = getRegMask(Token.stringValue())) {
732 Dest = MachineOperand::CreateRegMask(RegMask);
738 // TODO: parse the other machine operands.
739 return error("expected a machine operand");
744 void MIParser::initNames2InstrOpCodes() {
745 if (!Names2InstrOpCodes.empty())
747 const auto *TII = MF.getSubtarget().getInstrInfo();
748 assert(TII && "Expected target instruction info");
749 for (unsigned I = 0, E = TII->getNumOpcodes(); I < E; ++I)
750 Names2InstrOpCodes.insert(std::make_pair(StringRef(TII->getName(I)), I));
753 bool MIParser::parseInstrName(StringRef InstrName, unsigned &OpCode) {
754 initNames2InstrOpCodes();
755 auto InstrInfo = Names2InstrOpCodes.find(InstrName);
756 if (InstrInfo == Names2InstrOpCodes.end())
758 OpCode = InstrInfo->getValue();
762 void MIParser::initNames2Regs() {
763 if (!Names2Regs.empty())
765 // The '%noreg' register is the register 0.
766 Names2Regs.insert(std::make_pair("noreg", 0));
767 const auto *TRI = MF.getSubtarget().getRegisterInfo();
768 assert(TRI && "Expected target register info");
769 for (unsigned I = 0, E = TRI->getNumRegs(); I < E; ++I) {
771 Names2Regs.insert(std::make_pair(StringRef(TRI->getName(I)).lower(), I))
774 assert(WasInserted && "Expected registers to be unique case-insensitively");
778 bool MIParser::getRegisterByName(StringRef RegName, unsigned &Reg) {
780 auto RegInfo = Names2Regs.find(RegName);
781 if (RegInfo == Names2Regs.end())
783 Reg = RegInfo->getValue();
787 void MIParser::initNames2RegMasks() {
788 if (!Names2RegMasks.empty())
790 const auto *TRI = MF.getSubtarget().getRegisterInfo();
791 assert(TRI && "Expected target register info");
792 ArrayRef<const uint32_t *> RegMasks = TRI->getRegMasks();
793 ArrayRef<const char *> RegMaskNames = TRI->getRegMaskNames();
794 assert(RegMasks.size() == RegMaskNames.size());
795 for (size_t I = 0, E = RegMasks.size(); I < E; ++I)
796 Names2RegMasks.insert(
797 std::make_pair(StringRef(RegMaskNames[I]).lower(), RegMasks[I]));
800 const uint32_t *MIParser::getRegMask(StringRef Identifier) {
801 initNames2RegMasks();
802 auto RegMaskInfo = Names2RegMasks.find(Identifier);
803 if (RegMaskInfo == Names2RegMasks.end())
805 return RegMaskInfo->getValue();
808 void MIParser::initNames2SubRegIndices() {
809 if (!Names2SubRegIndices.empty())
811 const TargetRegisterInfo *TRI = MF.getSubtarget().getRegisterInfo();
812 for (unsigned I = 1, E = TRI->getNumSubRegIndices(); I < E; ++I)
813 Names2SubRegIndices.insert(
814 std::make_pair(StringRef(TRI->getSubRegIndexName(I)).lower(), I));
817 unsigned MIParser::getSubRegIndex(StringRef Name) {
818 initNames2SubRegIndices();
819 auto SubRegInfo = Names2SubRegIndices.find(Name);
820 if (SubRegInfo == Names2SubRegIndices.end())
822 return SubRegInfo->getValue();
825 bool llvm::parseMachineInstr(MachineInstr *&MI, SourceMgr &SM,
826 MachineFunction &MF, StringRef Src,
827 const PerFunctionMIParsingState &PFS,
828 const SlotMapping &IRSlots, SMDiagnostic &Error) {
829 return MIParser(SM, MF, Error, Src, PFS, IRSlots).parse(MI);
832 bool llvm::parseMBBReference(MachineBasicBlock *&MBB, SourceMgr &SM,
833 MachineFunction &MF, StringRef Src,
834 const PerFunctionMIParsingState &PFS,
835 const SlotMapping &IRSlots, SMDiagnostic &Error) {
836 return MIParser(SM, MF, Error, Src, PFS, IRSlots).parseMBB(MBB);
839 bool llvm::parseNamedRegisterReference(unsigned &Reg, SourceMgr &SM,
840 MachineFunction &MF, StringRef Src,
841 const PerFunctionMIParsingState &PFS,
842 const SlotMapping &IRSlots,
843 SMDiagnostic &Error) {
844 return MIParser(SM, MF, Error, Src, PFS, IRSlots).parseNamedRegister(Reg);