LLVM 19.0.0git
WebAssemblyAsmParser.cpp
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1//==- WebAssemblyAsmParser.cpp - Assembler for WebAssembly -*- C++ -*-==//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8///
9/// \file
10/// This file is part of the WebAssembly Assembler.
11///
12/// It contains code to translate a parsed .s file into MCInsts.
13///
14//===----------------------------------------------------------------------===//
15
21#include "WebAssembly.h"
22#include "llvm/MC/MCContext.h"
23#include "llvm/MC/MCExpr.h"
24#include "llvm/MC/MCInst.h"
25#include "llvm/MC/MCInstrInfo.h"
30#include "llvm/MC/MCStreamer.h"
32#include "llvm/MC/MCSymbol.h"
36
37using namespace llvm;
38
39#define DEBUG_TYPE "wasm-asm-parser"
40
41static const char *getSubtargetFeatureName(uint64_t Val);
42
43namespace {
44
45/// WebAssemblyOperand - Instances of this class represent the operands in a
46/// parsed Wasm machine instruction.
47struct WebAssemblyOperand : public MCParsedAsmOperand {
48 enum KindTy { Token, Integer, Float, Symbol, BrList } Kind;
49
50 SMLoc StartLoc, EndLoc;
51
52 struct TokOp {
53 StringRef Tok;
54 };
55
56 struct IntOp {
57 int64_t Val;
58 };
59
60 struct FltOp {
61 double Val;
62 };
63
64 struct SymOp {
65 const MCExpr *Exp;
66 };
67
68 struct BrLOp {
69 std::vector<unsigned> List;
70 };
71
72 union {
73 struct TokOp Tok;
74 struct IntOp Int;
75 struct FltOp Flt;
76 struct SymOp Sym;
77 struct BrLOp BrL;
78 };
79
80 WebAssemblyOperand(KindTy K, SMLoc Start, SMLoc End, TokOp T)
81 : Kind(K), StartLoc(Start), EndLoc(End), Tok(T) {}
82 WebAssemblyOperand(KindTy K, SMLoc Start, SMLoc End, IntOp I)
83 : Kind(K), StartLoc(Start), EndLoc(End), Int(I) {}
84 WebAssemblyOperand(KindTy K, SMLoc Start, SMLoc End, FltOp F)
85 : Kind(K), StartLoc(Start), EndLoc(End), Flt(F) {}
86 WebAssemblyOperand(KindTy K, SMLoc Start, SMLoc End, SymOp S)
87 : Kind(K), StartLoc(Start), EndLoc(End), Sym(S) {}
88 WebAssemblyOperand(KindTy K, SMLoc Start, SMLoc End)
89 : Kind(K), StartLoc(Start), EndLoc(End), BrL() {}
90
91 ~WebAssemblyOperand() {
92 if (isBrList())
93 BrL.~BrLOp();
94 }
95
96 bool isToken() const override { return Kind == Token; }
97 bool isImm() const override { return Kind == Integer || Kind == Symbol; }
98 bool isFPImm() const { return Kind == Float; }
99 bool isMem() const override { return false; }
100 bool isReg() const override { return false; }
101 bool isBrList() const { return Kind == BrList; }
102
103 MCRegister getReg() const override {
104 llvm_unreachable("Assembly inspects a register operand");
105 return 0;
106 }
107
108 StringRef getToken() const {
109 assert(isToken());
110 return Tok.Tok;
111 }
112
113 SMLoc getStartLoc() const override { return StartLoc; }
114 SMLoc getEndLoc() const override { return EndLoc; }
115
116 void addRegOperands(MCInst &, unsigned) const {
117 // Required by the assembly matcher.
118 llvm_unreachable("Assembly matcher creates register operands");
119 }
120
121 void addImmOperands(MCInst &Inst, unsigned N) const {
122 assert(N == 1 && "Invalid number of operands!");
123 if (Kind == Integer)
125 else if (Kind == Symbol)
127 else
128 llvm_unreachable("Should be integer immediate or symbol!");
129 }
130
131 void addFPImmf32Operands(MCInst &Inst, unsigned N) const {
132 assert(N == 1 && "Invalid number of operands!");
133 if (Kind == Float)
134 Inst.addOperand(
135 MCOperand::createSFPImm(bit_cast<uint32_t>(float(Flt.Val))));
136 else
137 llvm_unreachable("Should be float immediate!");
138 }
139
140 void addFPImmf64Operands(MCInst &Inst, unsigned N) const {
141 assert(N == 1 && "Invalid number of operands!");
142 if (Kind == Float)
143 Inst.addOperand(MCOperand::createDFPImm(bit_cast<uint64_t>(Flt.Val)));
144 else
145 llvm_unreachable("Should be float immediate!");
146 }
147
148 void addBrListOperands(MCInst &Inst, unsigned N) const {
149 assert(N == 1 && isBrList() && "Invalid BrList!");
150 for (auto Br : BrL.List)
152 }
153
154 void print(raw_ostream &OS) const override {
155 switch (Kind) {
156 case Token:
157 OS << "Tok:" << Tok.Tok;
158 break;
159 case Integer:
160 OS << "Int:" << Int.Val;
161 break;
162 case Float:
163 OS << "Flt:" << Flt.Val;
164 break;
165 case Symbol:
166 OS << "Sym:" << Sym.Exp;
167 break;
168 case BrList:
169 OS << "BrList:" << BrL.List.size();
170 break;
171 }
172 }
173};
174
175// Perhaps this should go somewhere common.
176static wasm::WasmLimits DefaultLimits() {
177 return {wasm::WASM_LIMITS_FLAG_NONE, 0, 0};
178}
179
180static MCSymbolWasm *GetOrCreateFunctionTableSymbol(MCContext &Ctx,
181 const StringRef &Name,
182 bool is64) {
183 MCSymbolWasm *Sym = cast_or_null<MCSymbolWasm>(Ctx.lookupSymbol(Name));
184 if (Sym) {
185 if (!Sym->isFunctionTable())
186 Ctx.reportError(SMLoc(), "symbol is not a wasm funcref table");
187 } else {
188 Sym = cast<MCSymbolWasm>(Ctx.getOrCreateSymbol(Name));
189 Sym->setFunctionTable(is64);
190 // The default function table is synthesized by the linker.
191 Sym->setUndefined();
192 }
193 return Sym;
194}
195
196class WebAssemblyAsmParser final : public MCTargetAsmParser {
197 MCAsmParser &Parser;
198 MCAsmLexer &Lexer;
199
200 // Order of labels, directives and instructions in a .s file have no
201 // syntactical enforcement. This class is a callback from the actual parser,
202 // and yet we have to be feeding data to the streamer in a very particular
203 // order to ensure a correct binary encoding that matches the regular backend
204 // (the streamer does not enforce this). This "state machine" enum helps
205 // guarantee that correct order.
206 enum ParserState {
207 FileStart,
208 FunctionLabel,
209 FunctionStart,
210 FunctionLocals,
212 EndFunction,
213 DataSection,
214 } CurrentState = FileStart;
215
216 // For ensuring blocks are properly nested.
217 enum NestingType {
218 Function,
219 Block,
220 Loop,
221 Try,
222 CatchAll,
223 If,
224 Else,
225 Undefined,
226 };
227 struct Nested {
228 NestingType NT;
230 };
231 std::vector<Nested> NestingStack;
232
233 MCSymbolWasm *DefaultFunctionTable = nullptr;
234 MCSymbol *LastFunctionLabel = nullptr;
235
236 bool is64;
237
239 // Don't type check if -no-type-check was set.
240 bool SkipTypeCheck;
241
242public:
243 WebAssemblyAsmParser(const MCSubtargetInfo &STI, MCAsmParser &Parser,
244 const MCInstrInfo &MII, const MCTargetOptions &Options)
245 : MCTargetAsmParser(Options, STI, MII), Parser(Parser),
246 Lexer(Parser.getLexer()), is64(STI.getTargetTriple().isArch64Bit()),
247 TC(Parser, MII, is64), SkipTypeCheck(Options.MCNoTypeCheck) {
248 setAvailableFeatures(ComputeAvailableFeatures(STI.getFeatureBits()));
249 // Don't type check if this is inline asm, since that is a naked sequence of
250 // instructions without a function/locals decl.
251 auto &SM = Parser.getSourceManager();
252 auto BufferName =
253 SM.getBufferInfo(SM.getMainFileID()).Buffer->getBufferIdentifier();
254 if (BufferName == "<inline asm>")
255 SkipTypeCheck = true;
256 }
257
258 void Initialize(MCAsmParser &Parser) override {
260
261 DefaultFunctionTable = GetOrCreateFunctionTableSymbol(
262 getContext(), "__indirect_function_table", is64);
263 if (!STI->checkFeatures("+reference-types"))
264 DefaultFunctionTable->setOmitFromLinkingSection();
265 }
266
267#define GET_ASSEMBLER_HEADER
268#include "WebAssemblyGenAsmMatcher.inc"
269
270 // TODO: This is required to be implemented, but appears unused.
271 bool parseRegister(MCRegister &Reg, SMLoc &StartLoc, SMLoc &EndLoc) override {
272 llvm_unreachable("parseRegister is not implemented.");
273 }
275 SMLoc &EndLoc) override {
276 llvm_unreachable("tryParseRegister is not implemented.");
277 }
278
279 bool error(const Twine &Msg, const AsmToken &Tok) {
280 return Parser.Error(Tok.getLoc(), Msg + Tok.getString());
281 }
282
283 bool error(const Twine &Msg, SMLoc Loc = SMLoc()) {
284 return Parser.Error(Loc.isValid() ? Loc : Lexer.getTok().getLoc(), Msg);
285 }
286
287 std::pair<StringRef, StringRef> nestingString(NestingType NT) {
288 switch (NT) {
289 case Function:
290 return {"function", "end_function"};
291 case Block:
292 return {"block", "end_block"};
293 case Loop:
294 return {"loop", "end_loop"};
295 case Try:
296 return {"try", "end_try/delegate"};
297 case CatchAll:
298 return {"catch_all", "end_try"};
299 case If:
300 return {"if", "end_if"};
301 case Else:
302 return {"else", "end_if"};
303 default:
304 llvm_unreachable("unknown NestingType");
305 }
306 }
307
308 void push(NestingType NT, wasm::WasmSignature Sig = wasm::WasmSignature()) {
309 NestingStack.push_back({NT, Sig});
310 }
311
312 bool pop(StringRef Ins, NestingType NT1, NestingType NT2 = Undefined) {
313 if (NestingStack.empty())
314 return error(Twine("End of block construct with no start: ") + Ins);
315 auto Top = NestingStack.back();
316 if (Top.NT != NT1 && Top.NT != NT2)
317 return error(Twine("Block construct type mismatch, expected: ") +
318 nestingString(Top.NT).second + ", instead got: " + Ins);
319 TC.setLastSig(Top.Sig);
320 NestingStack.pop_back();
321 return false;
322 }
323
324 // Pop a NestingType and push a new NestingType with the same signature. Used
325 // for if-else and try-catch(_all).
326 bool popAndPushWithSameSignature(StringRef Ins, NestingType PopNT,
327 NestingType PushNT) {
328 if (NestingStack.empty())
329 return error(Twine("End of block construct with no start: ") + Ins);
330 auto Sig = NestingStack.back().Sig;
331 if (pop(Ins, PopNT))
332 return true;
333 push(PushNT, Sig);
334 return false;
335 }
336
337 bool ensureEmptyNestingStack(SMLoc Loc = SMLoc()) {
338 auto Err = !NestingStack.empty();
339 while (!NestingStack.empty()) {
340 error(Twine("Unmatched block construct(s) at function end: ") +
341 nestingString(NestingStack.back().NT).first,
342 Loc);
343 NestingStack.pop_back();
344 }
345 return Err;
346 }
347
348 bool isNext(AsmToken::TokenKind Kind) {
349 auto Ok = Lexer.is(Kind);
350 if (Ok)
351 Parser.Lex();
352 return Ok;
353 }
354
355 bool expect(AsmToken::TokenKind Kind, const char *KindName) {
356 if (!isNext(Kind))
357 return error(std::string("Expected ") + KindName + ", instead got: ",
358 Lexer.getTok());
359 return false;
360 }
361
362 StringRef expectIdent() {
363 if (!Lexer.is(AsmToken::Identifier)) {
364 error("Expected identifier, got: ", Lexer.getTok());
365 return StringRef();
366 }
367 auto Name = Lexer.getTok().getString();
368 Parser.Lex();
369 return Name;
370 }
371
372 bool parseRegTypeList(SmallVectorImpl<wasm::ValType> &Types) {
373 while (Lexer.is(AsmToken::Identifier)) {
375 if (!Type)
376 return error("unknown type: ", Lexer.getTok());
377 Types.push_back(*Type);
378 Parser.Lex();
379 if (!isNext(AsmToken::Comma))
380 break;
381 }
382 return false;
383 }
384
385 void parseSingleInteger(bool IsNegative, OperandVector &Operands) {
386 auto &Int = Lexer.getTok();
387 int64_t Val = Int.getIntVal();
388 if (IsNegative)
389 Val = -Val;
390 Operands.push_back(std::make_unique<WebAssemblyOperand>(
391 WebAssemblyOperand::Integer, Int.getLoc(), Int.getEndLoc(),
392 WebAssemblyOperand::IntOp{Val}));
393 Parser.Lex();
394 }
395
396 bool parseSingleFloat(bool IsNegative, OperandVector &Operands) {
397 auto &Flt = Lexer.getTok();
398 double Val;
399 if (Flt.getString().getAsDouble(Val, false))
400 return error("Cannot parse real: ", Flt);
401 if (IsNegative)
402 Val = -Val;
403 Operands.push_back(std::make_unique<WebAssemblyOperand>(
404 WebAssemblyOperand::Float, Flt.getLoc(), Flt.getEndLoc(),
405 WebAssemblyOperand::FltOp{Val}));
406 Parser.Lex();
407 return false;
408 }
409
410 bool parseSpecialFloatMaybe(bool IsNegative, OperandVector &Operands) {
411 if (Lexer.isNot(AsmToken::Identifier))
412 return true;
413 auto &Flt = Lexer.getTok();
414 auto S = Flt.getString();
415 double Val;
416 if (S.compare_insensitive("infinity") == 0) {
417 Val = std::numeric_limits<double>::infinity();
418 } else if (S.compare_insensitive("nan") == 0) {
419 Val = std::numeric_limits<double>::quiet_NaN();
420 } else {
421 return true;
422 }
423 if (IsNegative)
424 Val = -Val;
425 Operands.push_back(std::make_unique<WebAssemblyOperand>(
426 WebAssemblyOperand::Float, Flt.getLoc(), Flt.getEndLoc(),
427 WebAssemblyOperand::FltOp{Val}));
428 Parser.Lex();
429 return false;
430 }
431
432 bool checkForP2AlignIfLoadStore(OperandVector &Operands, StringRef InstName) {
433 // FIXME: there is probably a cleaner way to do this.
434 auto IsLoadStore = InstName.contains(".load") ||
435 InstName.contains(".store") ||
436 InstName.contains("prefetch");
437 auto IsAtomic = InstName.contains("atomic.");
438 if (IsLoadStore || IsAtomic) {
439 // Parse load/store operands of the form: offset:p2align=align
440 if (IsLoadStore && isNext(AsmToken::Colon)) {
441 auto Id = expectIdent();
442 if (Id != "p2align")
443 return error("Expected p2align, instead got: " + Id);
444 if (expect(AsmToken::Equal, "="))
445 return true;
446 if (!Lexer.is(AsmToken::Integer))
447 return error("Expected integer constant");
448 parseSingleInteger(false, Operands);
449 } else {
450 // v128.{load,store}{8,16,32,64}_lane has both a memarg and a lane
451 // index. We need to avoid parsing an extra alignment operand for the
452 // lane index.
453 auto IsLoadStoreLane = InstName.contains("_lane");
454 if (IsLoadStoreLane && Operands.size() == 4)
455 return false;
456 // Alignment not specified (or atomics, must use default alignment).
457 // We can't just call WebAssembly::GetDefaultP2Align since we don't have
458 // an opcode until after the assembly matcher, so set a default to fix
459 // up later.
460 auto Tok = Lexer.getTok();
461 Operands.push_back(std::make_unique<WebAssemblyOperand>(
462 WebAssemblyOperand::Integer, Tok.getLoc(), Tok.getEndLoc(),
463 WebAssemblyOperand::IntOp{-1}));
464 }
465 }
466 return false;
467 }
468
469 void addBlockTypeOperand(OperandVector &Operands, SMLoc NameLoc,
471 if (BT != WebAssembly::BlockType::Void) {
472 wasm::WasmSignature Sig({static_cast<wasm::ValType>(BT)}, {});
473 TC.setLastSig(Sig);
474 NestingStack.back().Sig = Sig;
475 }
476 Operands.push_back(std::make_unique<WebAssemblyOperand>(
477 WebAssemblyOperand::Integer, NameLoc, NameLoc,
478 WebAssemblyOperand::IntOp{static_cast<int64_t>(BT)}));
479 }
480
481 bool parseLimits(wasm::WasmLimits *Limits) {
482 auto Tok = Lexer.getTok();
483 if (!Tok.is(AsmToken::Integer))
484 return error("Expected integer constant, instead got: ", Tok);
485 int64_t Val = Tok.getIntVal();
486 assert(Val >= 0);
487 Limits->Minimum = Val;
488 Parser.Lex();
489
490 if (isNext(AsmToken::Comma)) {
492 auto Tok = Lexer.getTok();
493 if (!Tok.is(AsmToken::Integer))
494 return error("Expected integer constant, instead got: ", Tok);
495 int64_t Val = Tok.getIntVal();
496 assert(Val >= 0);
497 Limits->Maximum = Val;
498 Parser.Lex();
499 }
500 return false;
501 }
502
503 bool parseFunctionTableOperand(std::unique_ptr<WebAssemblyOperand> *Op) {
504 if (STI->checkFeatures("+reference-types")) {
505 // If the reference-types feature is enabled, there is an explicit table
506 // operand. To allow the same assembly to be compiled with or without
507 // reference types, we allow the operand to be omitted, in which case we
508 // default to __indirect_function_table.
509 auto &Tok = Lexer.getTok();
510 if (Tok.is(AsmToken::Identifier)) {
511 auto *Sym =
512 GetOrCreateFunctionTableSymbol(getContext(), Tok.getString(), is64);
513 const auto *Val = MCSymbolRefExpr::create(Sym, getContext());
514 *Op = std::make_unique<WebAssemblyOperand>(
515 WebAssemblyOperand::Symbol, Tok.getLoc(), Tok.getEndLoc(),
516 WebAssemblyOperand::SymOp{Val});
517 Parser.Lex();
518 return expect(AsmToken::Comma, ",");
519 } else {
520 const auto *Val =
521 MCSymbolRefExpr::create(DefaultFunctionTable, getContext());
522 *Op = std::make_unique<WebAssemblyOperand>(
523 WebAssemblyOperand::Symbol, SMLoc(), SMLoc(),
524 WebAssemblyOperand::SymOp{Val});
525 return false;
526 }
527 } else {
528 // For the MVP there is at most one table whose number is 0, but we can't
529 // write a table symbol or issue relocations. Instead we just ensure the
530 // table is live and write a zero.
531 getStreamer().emitSymbolAttribute(DefaultFunctionTable, MCSA_NoDeadStrip);
532 *Op = std::make_unique<WebAssemblyOperand>(WebAssemblyOperand::Integer,
533 SMLoc(), SMLoc(),
534 WebAssemblyOperand::IntOp{0});
535 return false;
536 }
537 }
538
540 SMLoc NameLoc, OperandVector &Operands) override {
541 // Note: Name does NOT point into the sourcecode, but to a local, so
542 // use NameLoc instead.
543 Name = StringRef(NameLoc.getPointer(), Name.size());
544
545 // WebAssembly has instructions with / in them, which AsmLexer parses
546 // as separate tokens, so if we find such tokens immediately adjacent (no
547 // whitespace), expand the name to include them:
548 for (;;) {
549 auto &Sep = Lexer.getTok();
550 if (Sep.getLoc().getPointer() != Name.end() ||
551 Sep.getKind() != AsmToken::Slash)
552 break;
553 // Extend name with /
554 Name = StringRef(Name.begin(), Name.size() + Sep.getString().size());
555 Parser.Lex();
556 // We must now find another identifier, or error.
557 auto &Id = Lexer.getTok();
558 if (Id.getKind() != AsmToken::Identifier ||
559 Id.getLoc().getPointer() != Name.end())
560 return error("Incomplete instruction name: ", Id);
561 Name = StringRef(Name.begin(), Name.size() + Id.getString().size());
562 Parser.Lex();
563 }
564
565 // Now construct the name as first operand.
566 Operands.push_back(std::make_unique<WebAssemblyOperand>(
567 WebAssemblyOperand::Token, NameLoc, SMLoc::getFromPointer(Name.end()),
568 WebAssemblyOperand::TokOp{Name}));
569
570 // If this instruction is part of a control flow structure, ensure
571 // proper nesting.
572 bool ExpectBlockType = false;
573 bool ExpectFuncType = false;
574 std::unique_ptr<WebAssemblyOperand> FunctionTable;
575 if (Name == "block") {
576 push(Block);
577 ExpectBlockType = true;
578 } else if (Name == "loop") {
579 push(Loop);
580 ExpectBlockType = true;
581 } else if (Name == "try") {
582 push(Try);
583 ExpectBlockType = true;
584 } else if (Name == "if") {
585 push(If);
586 ExpectBlockType = true;
587 } else if (Name == "else") {
588 if (popAndPushWithSameSignature(Name, If, Else))
589 return true;
590 } else if (Name == "catch") {
591 if (popAndPushWithSameSignature(Name, Try, Try))
592 return true;
593 } else if (Name == "catch_all") {
594 if (popAndPushWithSameSignature(Name, Try, CatchAll))
595 return true;
596 } else if (Name == "end_if") {
597 if (pop(Name, If, Else))
598 return true;
599 } else if (Name == "end_try") {
600 if (pop(Name, Try, CatchAll))
601 return true;
602 } else if (Name == "delegate") {
603 if (pop(Name, Try))
604 return true;
605 } else if (Name == "end_loop") {
606 if (pop(Name, Loop))
607 return true;
608 } else if (Name == "end_block") {
609 if (pop(Name, Block))
610 return true;
611 } else if (Name == "end_function") {
612 ensureLocals(getStreamer());
613 CurrentState = EndFunction;
614 if (pop(Name, Function) || ensureEmptyNestingStack())
615 return true;
616 } else if (Name == "call_indirect" || Name == "return_call_indirect") {
617 // These instructions have differing operand orders in the text format vs
618 // the binary formats. The MC instructions follow the binary format, so
619 // here we stash away the operand and append it later.
620 if (parseFunctionTableOperand(&FunctionTable))
621 return true;
622 ExpectFuncType = true;
623 }
624
625 if (ExpectFuncType || (ExpectBlockType && Lexer.is(AsmToken::LParen))) {
626 // This has a special TYPEINDEX operand which in text we
627 // represent as a signature, such that we can re-build this signature,
628 // attach it to an anonymous symbol, which is what WasmObjectWriter
629 // expects to be able to recreate the actual unique-ified type indices.
630 auto &Ctx = getContext();
631 auto Loc = Parser.getTok();
632 auto Signature = Ctx.createWasmSignature();
633 if (parseSignature(Signature))
634 return true;
635 // Got signature as block type, don't need more
636 TC.setLastSig(*Signature);
637 if (ExpectBlockType)
638 NestingStack.back().Sig = *Signature;
639 ExpectBlockType = false;
640 // The "true" here will cause this to be a nameless symbol.
641 MCSymbol *Sym = Ctx.createTempSymbol("typeindex", true);
642 auto *WasmSym = cast<MCSymbolWasm>(Sym);
643 WasmSym->setSignature(Signature);
644 WasmSym->setType(wasm::WASM_SYMBOL_TYPE_FUNCTION);
645 const MCExpr *Expr = MCSymbolRefExpr::create(
647 Operands.push_back(std::make_unique<WebAssemblyOperand>(
648 WebAssemblyOperand::Symbol, Loc.getLoc(), Loc.getEndLoc(),
649 WebAssemblyOperand::SymOp{Expr}));
650 }
651
652 while (Lexer.isNot(AsmToken::EndOfStatement)) {
653 auto &Tok = Lexer.getTok();
654 switch (Tok.getKind()) {
656 if (!parseSpecialFloatMaybe(false, Operands))
657 break;
658 auto &Id = Lexer.getTok();
659 if (ExpectBlockType) {
660 // Assume this identifier is a block_type.
661 auto BT = WebAssembly::parseBlockType(Id.getString());
662 if (BT == WebAssembly::BlockType::Invalid)
663 return error("Unknown block type: ", Id);
664 addBlockTypeOperand(Operands, NameLoc, BT);
665 Parser.Lex();
666 } else {
667 // Assume this identifier is a label.
668 const MCExpr *Val;
669 SMLoc Start = Id.getLoc();
670 SMLoc End;
671 if (Parser.parseExpression(Val, End))
672 return error("Cannot parse symbol: ", Lexer.getTok());
673 Operands.push_back(std::make_unique<WebAssemblyOperand>(
674 WebAssemblyOperand::Symbol, Start, End,
675 WebAssemblyOperand::SymOp{Val}));
676 if (checkForP2AlignIfLoadStore(Operands, Name))
677 return true;
678 }
679 break;
680 }
681 case AsmToken::Minus:
682 Parser.Lex();
683 if (Lexer.is(AsmToken::Integer)) {
684 parseSingleInteger(true, Operands);
685 if (checkForP2AlignIfLoadStore(Operands, Name))
686 return true;
687 } else if (Lexer.is(AsmToken::Real)) {
688 if (parseSingleFloat(true, Operands))
689 return true;
690 } else if (!parseSpecialFloatMaybe(true, Operands)) {
691 } else {
692 return error("Expected numeric constant instead got: ",
693 Lexer.getTok());
694 }
695 break;
697 parseSingleInteger(false, Operands);
698 if (checkForP2AlignIfLoadStore(Operands, Name))
699 return true;
700 break;
701 case AsmToken::Real: {
702 if (parseSingleFloat(false, Operands))
703 return true;
704 break;
705 }
706 case AsmToken::LCurly: {
707 Parser.Lex();
708 auto Op = std::make_unique<WebAssemblyOperand>(
709 WebAssemblyOperand::BrList, Tok.getLoc(), Tok.getEndLoc());
710 if (!Lexer.is(AsmToken::RCurly))
711 for (;;) {
712 Op->BrL.List.push_back(Lexer.getTok().getIntVal());
713 expect(AsmToken::Integer, "integer");
714 if (!isNext(AsmToken::Comma))
715 break;
716 }
717 expect(AsmToken::RCurly, "}");
718 Operands.push_back(std::move(Op));
719 break;
720 }
721 default:
722 return error("Unexpected token in operand: ", Tok);
723 }
724 if (Lexer.isNot(AsmToken::EndOfStatement)) {
725 if (expect(AsmToken::Comma, ","))
726 return true;
727 }
728 }
729 if (ExpectBlockType && Operands.size() == 1) {
730 // Support blocks with no operands as default to void.
731 addBlockTypeOperand(Operands, NameLoc, WebAssembly::BlockType::Void);
732 }
733 if (FunctionTable)
734 Operands.push_back(std::move(FunctionTable));
735 Parser.Lex();
736 return false;
737 }
738
739 bool parseSignature(wasm::WasmSignature *Signature) {
740 if (expect(AsmToken::LParen, "("))
741 return true;
742 if (parseRegTypeList(Signature->Params))
743 return true;
744 if (expect(AsmToken::RParen, ")"))
745 return true;
746 if (expect(AsmToken::MinusGreater, "->"))
747 return true;
748 if (expect(AsmToken::LParen, "("))
749 return true;
750 if (parseRegTypeList(Signature->Returns))
751 return true;
752 if (expect(AsmToken::RParen, ")"))
753 return true;
754 return false;
755 }
756
757 bool CheckDataSection() {
758 if (CurrentState != DataSection) {
759 auto WS = cast<MCSectionWasm>(getStreamer().getCurrentSectionOnly());
760 if (WS && WS->isText())
761 return error("data directive must occur in a data segment: ",
762 Lexer.getTok());
763 }
764 CurrentState = DataSection;
765 return false;
766 }
767
768 // This function processes wasm-specific directives streamed to
769 // WebAssemblyTargetStreamer, all others go to the generic parser
770 // (see WasmAsmParser).
771 ParseStatus parseDirective(AsmToken DirectiveID) override {
772 assert(DirectiveID.getKind() == AsmToken::Identifier);
773 auto &Out = getStreamer();
774 auto &TOut =
775 reinterpret_cast<WebAssemblyTargetStreamer &>(*Out.getTargetStreamer());
776 auto &Ctx = Out.getContext();
777
778 if (DirectiveID.getString() == ".globaltype") {
779 auto SymName = expectIdent();
780 if (SymName.empty())
782 if (expect(AsmToken::Comma, ","))
784 auto TypeTok = Lexer.getTok();
785 auto TypeName = expectIdent();
786 if (TypeName.empty())
788 auto Type = WebAssembly::parseType(TypeName);
789 if (!Type)
790 return error("Unknown type in .globaltype directive: ", TypeTok);
791 // Optional mutable modifier. Default to mutable for historical reasons.
792 // Ideally we would have gone with immutable as the default and used `mut`
793 // as the modifier to match the `.wat` format.
794 bool Mutable = true;
795 if (isNext(AsmToken::Comma)) {
796 TypeTok = Lexer.getTok();
797 auto Id = expectIdent();
798 if (Id.empty())
800 if (Id == "immutable")
801 Mutable = false;
802 else
803 // Should we also allow `mutable` and `mut` here for clarity?
804 return error("Unknown type in .globaltype modifier: ", TypeTok);
805 }
806 // Now set this symbol with the correct type.
807 auto WasmSym = cast<MCSymbolWasm>(Ctx.getOrCreateSymbol(SymName));
808 WasmSym->setType(wasm::WASM_SYMBOL_TYPE_GLOBAL);
809 WasmSym->setGlobalType(wasm::WasmGlobalType{uint8_t(*Type), Mutable});
810 // And emit the directive again.
811 TOut.emitGlobalType(WasmSym);
812 return expect(AsmToken::EndOfStatement, "EOL");
813 }
814
815 if (DirectiveID.getString() == ".tabletype") {
816 // .tabletype SYM, ELEMTYPE[, MINSIZE[, MAXSIZE]]
817 auto SymName = expectIdent();
818 if (SymName.empty())
820 if (expect(AsmToken::Comma, ","))
822
823 auto ElemTypeTok = Lexer.getTok();
824 auto ElemTypeName = expectIdent();
825 if (ElemTypeName.empty())
827 std::optional<wasm::ValType> ElemType =
828 WebAssembly::parseType(ElemTypeName);
829 if (!ElemType)
830 return error("Unknown type in .tabletype directive: ", ElemTypeTok);
831
832 wasm::WasmLimits Limits = DefaultLimits();
833 if (isNext(AsmToken::Comma) && parseLimits(&Limits))
835
836 // Now that we have the name and table type, we can actually create the
837 // symbol
838 auto WasmSym = cast<MCSymbolWasm>(Ctx.getOrCreateSymbol(SymName));
839 WasmSym->setType(wasm::WASM_SYMBOL_TYPE_TABLE);
840 if (is64) {
842 }
843 wasm::WasmTableType Type = {*ElemType, Limits};
844 WasmSym->setTableType(Type);
845 TOut.emitTableType(WasmSym);
846 return expect(AsmToken::EndOfStatement, "EOL");
847 }
848
849 if (DirectiveID.getString() == ".functype") {
850 // This code has to send things to the streamer similar to
851 // WebAssemblyAsmPrinter::EmitFunctionBodyStart.
852 // TODO: would be good to factor this into a common function, but the
853 // assembler and backend really don't share any common code, and this code
854 // parses the locals separately.
855 auto SymName = expectIdent();
856 if (SymName.empty())
858 auto WasmSym = cast<MCSymbolWasm>(Ctx.getOrCreateSymbol(SymName));
859 if (WasmSym->isDefined()) {
860 // We push 'Function' either when a label is parsed or a .functype
861 // directive is parsed. The reason it is not easy to do this uniformly
862 // in a single place is,
863 // 1. We can't do this at label parsing time only because there are
864 // cases we don't have .functype directive before a function label,
865 // in which case we don't know if the label is a function at the time
866 // of parsing.
867 // 2. We can't do this at .functype parsing time only because we want to
868 // detect a function started with a label and not ended correctly
869 // without encountering a .functype directive after the label.
870 if (CurrentState != FunctionLabel) {
871 // This .functype indicates a start of a function.
872 if (ensureEmptyNestingStack())
874 push(Function);
875 }
876 CurrentState = FunctionStart;
877 LastFunctionLabel = WasmSym;
878 }
879 auto Signature = Ctx.createWasmSignature();
880 if (parseSignature(Signature))
882 TC.funcDecl(*Signature);
883 WasmSym->setSignature(Signature);
884 WasmSym->setType(wasm::WASM_SYMBOL_TYPE_FUNCTION);
885 TOut.emitFunctionType(WasmSym);
886 // TODO: backend also calls TOut.emitIndIdx, but that is not implemented.
887 return expect(AsmToken::EndOfStatement, "EOL");
888 }
889
890 if (DirectiveID.getString() == ".export_name") {
891 auto SymName = expectIdent();
892 if (SymName.empty())
894 if (expect(AsmToken::Comma, ","))
896 auto ExportName = expectIdent();
897 if (ExportName.empty())
899 auto WasmSym = cast<MCSymbolWasm>(Ctx.getOrCreateSymbol(SymName));
900 WasmSym->setExportName(Ctx.allocateString(ExportName));
901 TOut.emitExportName(WasmSym, ExportName);
902 return expect(AsmToken::EndOfStatement, "EOL");
903 }
904
905 if (DirectiveID.getString() == ".import_module") {
906 auto SymName = expectIdent();
907 if (SymName.empty())
909 if (expect(AsmToken::Comma, ","))
911 auto ImportModule = expectIdent();
912 if (ImportModule.empty())
914 auto WasmSym = cast<MCSymbolWasm>(Ctx.getOrCreateSymbol(SymName));
915 WasmSym->setImportModule(Ctx.allocateString(ImportModule));
916 TOut.emitImportModule(WasmSym, ImportModule);
917 return expect(AsmToken::EndOfStatement, "EOL");
918 }
919
920 if (DirectiveID.getString() == ".import_name") {
921 auto SymName = expectIdent();
922 if (SymName.empty())
924 if (expect(AsmToken::Comma, ","))
926 auto ImportName = expectIdent();
927 if (ImportName.empty())
929 auto WasmSym = cast<MCSymbolWasm>(Ctx.getOrCreateSymbol(SymName));
930 WasmSym->setImportName(Ctx.allocateString(ImportName));
931 TOut.emitImportName(WasmSym, ImportName);
932 return expect(AsmToken::EndOfStatement, "EOL");
933 }
934
935 if (DirectiveID.getString() == ".tagtype") {
936 auto SymName = expectIdent();
937 if (SymName.empty())
939 auto WasmSym = cast<MCSymbolWasm>(Ctx.getOrCreateSymbol(SymName));
940 auto Signature = Ctx.createWasmSignature();
941 if (parseRegTypeList(Signature->Params))
943 WasmSym->setSignature(Signature);
944 WasmSym->setType(wasm::WASM_SYMBOL_TYPE_TAG);
945 TOut.emitTagType(WasmSym);
946 // TODO: backend also calls TOut.emitIndIdx, but that is not implemented.
947 return expect(AsmToken::EndOfStatement, "EOL");
948 }
949
950 if (DirectiveID.getString() == ".local") {
951 if (CurrentState != FunctionStart)
952 return error(".local directive should follow the start of a function: ",
953 Lexer.getTok());
955 if (parseRegTypeList(Locals))
957 TC.localDecl(Locals);
958 TOut.emitLocal(Locals);
959 CurrentState = FunctionLocals;
960 return expect(AsmToken::EndOfStatement, "EOL");
961 }
962
963 if (DirectiveID.getString() == ".int8" ||
964 DirectiveID.getString() == ".int16" ||
965 DirectiveID.getString() == ".int32" ||
966 DirectiveID.getString() == ".int64") {
967 if (CheckDataSection())
969 const MCExpr *Val;
970 SMLoc End;
971 if (Parser.parseExpression(Val, End))
972 return error("Cannot parse .int expression: ", Lexer.getTok());
973 size_t NumBits = 0;
974 DirectiveID.getString().drop_front(4).getAsInteger(10, NumBits);
975 Out.emitValue(Val, NumBits / 8, End);
976 return expect(AsmToken::EndOfStatement, "EOL");
977 }
978
979 if (DirectiveID.getString() == ".asciz") {
980 if (CheckDataSection())
982 std::string S;
983 if (Parser.parseEscapedString(S))
984 return error("Cannot parse string constant: ", Lexer.getTok());
985 Out.emitBytes(StringRef(S.c_str(), S.length() + 1));
986 return expect(AsmToken::EndOfStatement, "EOL");
987 }
988
989 return ParseStatus::NoMatch; // We didn't process this directive.
990 }
991
992 // Called either when the first instruction is parsed of the function ends.
993 void ensureLocals(MCStreamer &Out) {
994 if (CurrentState == FunctionStart) {
995 // We haven't seen a .local directive yet. The streamer requires locals to
996 // be encoded as a prelude to the instructions, so emit an empty list of
997 // locals here.
998 auto &TOut = reinterpret_cast<WebAssemblyTargetStreamer &>(
999 *Out.getTargetStreamer());
1001 CurrentState = FunctionLocals;
1002 }
1003 }
1004
1005 bool MatchAndEmitInstruction(SMLoc IDLoc, unsigned & /*Opcode*/,
1008 bool MatchingInlineAsm) override {
1009 MCInst Inst;
1010 Inst.setLoc(IDLoc);
1011 FeatureBitset MissingFeatures;
1012 unsigned MatchResult = MatchInstructionImpl(
1013 Operands, Inst, ErrorInfo, MissingFeatures, MatchingInlineAsm);
1014 switch (MatchResult) {
1015 case Match_Success: {
1016 ensureLocals(Out);
1017 // Fix unknown p2align operands.
1019 if (Align != -1U) {
1020 auto &Op0 = Inst.getOperand(0);
1021 if (Op0.getImm() == -1)
1022 Op0.setImm(Align);
1023 }
1024 if (is64) {
1025 // Upgrade 32-bit loads/stores to 64-bit. These mostly differ by having
1026 // an offset64 arg instead of offset32, but to the assembler matcher
1027 // they're both immediates so don't get selected for.
1028 auto Opc64 = WebAssembly::getWasm64Opcode(
1029 static_cast<uint16_t>(Inst.getOpcode()));
1030 if (Opc64 >= 0) {
1031 Inst.setOpcode(Opc64);
1032 }
1033 }
1034 if (!SkipTypeCheck && TC.typeCheck(IDLoc, Inst, Operands))
1035 return true;
1036 Out.emitInstruction(Inst, getSTI());
1037 if (CurrentState == EndFunction) {
1038 onEndOfFunction(IDLoc);
1039 } else {
1040 CurrentState = Instructions;
1041 }
1042 return false;
1043 }
1044 case Match_MissingFeature: {
1045 assert(MissingFeatures.count() > 0 && "Expected missing features");
1046 SmallString<128> Message;
1047 raw_svector_ostream OS(Message);
1048 OS << "instruction requires:";
1049 for (unsigned i = 0, e = MissingFeatures.size(); i != e; ++i)
1050 if (MissingFeatures.test(i))
1051 OS << ' ' << getSubtargetFeatureName(i);
1052 return Parser.Error(IDLoc, Message);
1053 }
1054 case Match_MnemonicFail:
1055 return Parser.Error(IDLoc, "invalid instruction");
1056 case Match_NearMisses:
1057 return Parser.Error(IDLoc, "ambiguous instruction");
1059 case Match_InvalidOperand: {
1060 SMLoc ErrorLoc = IDLoc;
1061 if (ErrorInfo != ~0ULL) {
1062 if (ErrorInfo >= Operands.size())
1063 return Parser.Error(IDLoc, "too few operands for instruction");
1064 ErrorLoc = Operands[ErrorInfo]->getStartLoc();
1065 if (ErrorLoc == SMLoc())
1066 ErrorLoc = IDLoc;
1067 }
1068 return Parser.Error(ErrorLoc, "invalid operand for instruction");
1069 }
1070 }
1071 llvm_unreachable("Implement any new match types added!");
1072 }
1073
1074 void doBeforeLabelEmit(MCSymbol *Symbol, SMLoc IDLoc) override {
1075 // Code below only applies to labels in text sections.
1076 auto CWS = cast<MCSectionWasm>(getStreamer().getCurrentSectionOnly());
1077 if (!CWS->isText())
1078 return;
1079
1080 auto WasmSym = cast<MCSymbolWasm>(Symbol);
1081 // Unlike other targets, we don't allow data in text sections (labels
1082 // declared with .type @object).
1083 if (WasmSym->getType() == wasm::WASM_SYMBOL_TYPE_DATA) {
1084 Parser.Error(IDLoc,
1085 "Wasm doesn\'t support data symbols in text sections");
1086 return;
1087 }
1088
1089 // Start a new section for the next function automatically, since our
1090 // object writer expects each function to have its own section. This way
1091 // The user can't forget this "convention".
1092 auto SymName = Symbol->getName();
1093 if (SymName.starts_with(".L"))
1094 return; // Local Symbol.
1095
1096 // TODO: If the user explicitly creates a new function section, we ignore
1097 // its name when we create this one. It would be nice to honor their
1098 // choice, while still ensuring that we create one if they forget.
1099 // (that requires coordination with WasmAsmParser::parseSectionDirective)
1100 auto SecName = ".text." + SymName;
1101
1102 auto *Group = CWS->getGroup();
1103 // If the current section is a COMDAT, also set the flag on the symbol.
1104 // TODO: Currently the only place that the symbols' comdat flag matters is
1105 // for importing comdat functions. But there's no way to specify that in
1106 // assembly currently.
1107 if (Group)
1108 WasmSym->setComdat(true);
1109 auto *WS = getContext().getWasmSection(SecName, SectionKind::getText(), 0,
1112 // Also generate DWARF for this section if requested.
1113 if (getContext().getGenDwarfForAssembly())
1115
1116 if (WasmSym->isFunction()) {
1117 // We give the location of the label (IDLoc) here, because otherwise the
1118 // lexer's next location will be used, which can be confusing. For
1119 // example:
1120 //
1121 // test0: ; This function does not end properly
1122 // ...
1123 //
1124 // test1: ; We would like to point to this line for error
1125 // ... . Not this line, which can contain any instruction
1126 ensureEmptyNestingStack(IDLoc);
1127 CurrentState = FunctionLabel;
1128 LastFunctionLabel = Symbol;
1129 push(Function);
1130 }
1131 }
1132
1133 void onEndOfFunction(SMLoc ErrorLoc) {
1134 if (!SkipTypeCheck)
1135 TC.endOfFunction(ErrorLoc);
1136 // Reset the type checker state.
1137 TC.Clear();
1138 }
1139
1140 void onEndOfFile() override { ensureEmptyNestingStack(); }
1141};
1142} // end anonymous namespace
1143
1144// Force static initialization.
1148}
1149
1150#define GET_REGISTER_MATCHER
1151#define GET_SUBTARGET_FEATURE_NAME
1152#define GET_MATCHER_IMPLEMENTATION
1153#include "WebAssemblyGenAsmMatcher.inc"
1154
1155StringRef GetMnemonic(unsigned Opc) {
1156 // FIXME: linear search!
1157 for (auto &ME : MatchTable0) {
1158 if (ME.Opcode == Opc) {
1159 return ME.getMnemonic();
1160 }
1161 }
1162 assert(false && "mnemonic not found");
1163 return StringRef();
1164}
static const char * getSubtargetFeatureName(uint64_t Val)
BitTracker BT
Definition: BitTracker.cpp:73
static void push(SmallVectorImpl< uint64_t > &R, StringRef Str)
#define LLVM_EXTERNAL_VISIBILITY
Definition: Compiler.h:135
std::string Name
bool End
Definition: ELF_riscv.cpp:480
Symbol * Sym
Definition: ELF_riscv.cpp:479
static GCMetadataPrinterRegistry::Add< ErlangGCPrinter > X("erlang", "erlang-compatible garbage collector")
static LVOptions Options
Definition: LVOptions.cpp:25
#define F(x, y, z)
Definition: MD5.cpp:55
#define I(x, y, z)
Definition: MD5.cpp:58
mir Rename Register Operands
static GCMetadataPrinterRegistry::Add< OcamlGCMetadataPrinter > Y("ocaml", "ocaml 3.10-compatible collector")
const NodeList & List
Definition: RDFGraph.cpp:201
assert(ImpDefSCC.getReg()==AMDGPU::SCC &&ImpDefSCC.isDef())
raw_pwrite_stream & OS
#define error(X)
StringRef GetMnemonic(unsigned Opc)
static const char * getSubtargetFeatureName(uint64_t Val)
LLVM_EXTERNAL_VISIBILITY void LLVMInitializeWebAssemblyAsmParser()
This file is part of the WebAssembly Assembler.
This file provides WebAssembly-specific target descriptions.
This file contains the declaration of the WebAssembly-specific type parsing utility functions.
This file registers the WebAssembly target.
This file declares WebAssembly-specific target streamer classes.
This file contains the entry points for global functions defined in the LLVM WebAssembly back-end.
Target independent representation for an assembler token.
Definition: MCAsmMacro.h:21
SMLoc getLoc() const
Definition: MCAsmLexer.cpp:26
int64_t getIntVal() const
Definition: MCAsmMacro.h:115
StringRef getString() const
Get the string for the current token, this includes all characters (for example, the quotes on string...
Definition: MCAsmMacro.h:110
bool is(TokenKind K) const
Definition: MCAsmMacro.h:82
TokenKind getKind() const
Definition: MCAsmMacro.h:81
SMLoc getEndLoc() const
Definition: MCAsmLexer.cpp:30
This class represents an Operation in the Expression.
Base class for user error types.
Definition: Error.h:355
Container class for subtarget features.
constexpr bool test(unsigned I) const
size_t count() const
constexpr size_t size() const
Represents a single loop in the control flow graph.
Definition: LoopInfo.h:44
Generic assembler lexer interface, for use by target specific assembly lexers.
Definition: MCAsmLexer.h:37
bool isNot(AsmToken::TokenKind K) const
Check if the current token has kind K.
Definition: MCAsmLexer.h:144
const AsmToken & getTok() const
Get the current (last) lexed token.
Definition: MCAsmLexer.h:106
bool is(AsmToken::TokenKind K) const
Check if the current token has kind K.
Definition: MCAsmLexer.h:141
virtual void Initialize(MCAsmParser &Parser)
Initialize the extension for parsing using the given Parser.
Generic assembler parser interface, for use by target specific assembly parsers.
Definition: MCAsmParser.h:123
virtual bool parseEscapedString(std::string &Data)=0
Parse the current token as a string which may include escaped characters and return the string conten...
virtual bool parseExpression(const MCExpr *&Res, SMLoc &EndLoc)=0
Parse an arbitrary expression.
virtual SourceMgr & getSourceManager()=0
const AsmToken & getTok() const
Get the current AsmToken from the stream.
Definition: MCAsmParser.cpp:40
virtual const AsmToken & Lex()=0
Get the next AsmToken in the stream, possibly handling file inclusion first.
bool Error(SMLoc L, const Twine &Msg, SMRange Range=std::nullopt)
Return an error at the location L, with the message Msg.
Context object for machine code objects.
Definition: MCContext.h:83
MCSymbol * createTempSymbol()
Create a temporary symbol with a unique name.
Definition: MCContext.cpp:346
MCSectionWasm * getWasmSection(const Twine &Section, SectionKind K, unsigned Flags=0)
Definition: MCContext.h:624
wasm::WasmSignature * createWasmSignature()
Allocates and returns a new WasmSignature instance (with empty parameter and return type lists).
Definition: MCContext.cpp:424
bool addGenDwarfSection(MCSection *Sec)
Definition: MCContext.h:774
StringRef allocateString(StringRef s)
Allocates a copy of the given string on the allocator managed by this context and returns the result.
Definition: MCContext.h:820
MCSymbol * lookupSymbol(const Twine &Name) const
Get the symbol for Name, or null.
Definition: MCContext.cpp:408
void reportError(SMLoc L, const Twine &Msg)
Definition: MCContext.cpp:1069
@ GenericSectionID
Pass this value as the UniqueID during section creation to get the generic section with the given nam...
Definition: MCContext.h:530
MCSymbol * getOrCreateSymbol(const Twine &Name)
Lookup the symbol inside with the specified Name.
Definition: MCContext.cpp:213
Base class for the full range of assembler expressions which are needed for parsing.
Definition: MCExpr.h:34
Instances of this class represent a single low-level machine instruction.
Definition: MCInst.h:184
void setLoc(SMLoc loc)
Definition: MCInst.h:203
unsigned getOpcode() const
Definition: MCInst.h:198
void addOperand(const MCOperand Op)
Definition: MCInst.h:210
void setOpcode(unsigned Op)
Definition: MCInst.h:197
const MCOperand & getOperand(unsigned i) const
Definition: MCInst.h:206
Interface to description of machine instruction set.
Definition: MCInstrInfo.h:26
void setImm(int64_t Val)
Definition: MCInst.h:85
static MCOperand createExpr(const MCExpr *Val)
Definition: MCInst.h:162
static MCOperand createSFPImm(uint32_t Val)
Definition: MCInst.h:148
static MCOperand createImm(int64_t Val)
Definition: MCInst.h:141
static MCOperand createDFPImm(uint64_t Val)
Definition: MCInst.h:155
MCParsedAsmOperand - This abstract class represents a source-level assembly instruction operand.
virtual SMLoc getStartLoc() const =0
getStartLoc - Get the location of the first token of this operand.
virtual bool isReg() const =0
isReg - Is this a register operand?
virtual bool isMem() const =0
isMem - Is this a memory operand?
virtual MCRegister getReg() const =0
virtual void print(raw_ostream &OS) const =0
print - Print a debug representation of the operand to the given stream.
virtual bool isToken() const =0
isToken - Is this a token operand?
virtual bool isImm() const =0
isImm - Is this an immediate operand?
virtual SMLoc getEndLoc() const =0
getEndLoc - Get the location of the last token of this operand.
Wrapper class representing physical registers. Should be passed by value.
Definition: MCRegister.h:33
Streaming machine code generation interface.
Definition: MCStreamer.h:213
virtual void emitInstruction(const MCInst &Inst, const MCSubtargetInfo &STI)
Emit the given Instruction into the current section.
virtual bool emitSymbolAttribute(MCSymbol *Symbol, MCSymbolAttr Attribute)=0
Add the given Attribute to Symbol.
MCTargetStreamer * getTargetStreamer()
Definition: MCStreamer.h:309
virtual void switchSection(MCSection *Section, uint32_t Subsec=0)
Set the current section where code is being emitted to Section.
Generic base class for all target subtargets.
bool checkFeatures(StringRef FS) const
Check whether the subtarget features are enabled/disabled as per the provided string,...
const FeatureBitset & getFeatureBits() const
static const MCSymbolRefExpr * create(const MCSymbol *Symbol, MCContext &Ctx)
Definition: MCExpr.h:393
void setOmitFromLinkingSection()
Definition: MCSymbolWasm.h:88
MCSymbol - Instances of this class represent a symbol name in the MC file, and MCSymbols are created ...
Definition: MCSymbol.h:41
MCTargetAsmParser - Generic interface to target specific assembly parsers.
virtual ParseStatus parseDirective(AsmToken DirectiveID)
Parses a target-specific assembler directive.
virtual bool parseRegister(MCRegister &Reg, SMLoc &StartLoc, SMLoc &EndLoc)=0
virtual ParseStatus tryParseRegister(MCRegister &Reg, SMLoc &StartLoc, SMLoc &EndLoc)=0
tryParseRegister - parse one register if possible
void setAvailableFeatures(const FeatureBitset &Value)
const MCSubtargetInfo & getSTI() const
virtual void doBeforeLabelEmit(MCSymbol *Symbol, SMLoc IDLoc)
virtual bool ParseInstruction(ParseInstructionInfo &Info, StringRef Name, SMLoc NameLoc, OperandVector &Operands)=0
ParseInstruction - Parse one assembly instruction.
virtual bool MatchAndEmitInstruction(SMLoc IDLoc, unsigned &Opcode, OperandVector &Operands, MCStreamer &Out, uint64_t &ErrorInfo, bool MatchingInlineAsm)=0
MatchAndEmitInstruction - Recognize a series of operands of a parsed instruction as an actual MCInst ...
Ternary parse status returned by various parse* methods.
static constexpr StatusTy Failure
static constexpr StatusTy NoMatch
Represents a location in source code.
Definition: SMLoc.h:23
static SMLoc getFromPointer(const char *Ptr)
Definition: SMLoc.h:36
constexpr const char * getPointer() const
Definition: SMLoc.h:34
static SectionKind getText()
Definition: SectionKind.h:190
SmallString - A SmallString is just a SmallVector with methods and accessors that make it work better...
Definition: SmallString.h:26
This class consists of common code factored out of the SmallVector class to reduce code duplication b...
Definition: SmallVector.h:586
This is a 'vector' (really, a variable-sized array), optimized for the case when the array is small.
Definition: SmallVector.h:1209
const SrcBuffer & getBufferInfo(unsigned i) const
Definition: SourceMgr.h:120
StringRef - Represent a constant reference to a string, i.e.
Definition: StringRef.h:50
bool getAsInteger(unsigned Radix, T &Result) const
Parse the current string as an integer of the specified radix.
Definition: StringRef.h:463
constexpr bool empty() const
empty - Check if the string is empty.
Definition: StringRef.h:134
StringRef drop_front(size_t N=1) const
Return a StringRef equal to 'this' but with the first N elements dropped.
Definition: StringRef.h:602
bool contains(StringRef Other) const
Return true if the given string is a substring of *this, and false otherwise.
Definition: StringRef.h:417
Twine - A lightweight data structure for efficiently representing the concatenation of temporary valu...
Definition: Twine.h:81
The instances of the Type class are immutable: once they are created, they are never changed.
Definition: Type.h:45
void funcDecl(const wasm::WasmSignature &Sig)
void setLastSig(const wasm::WasmSignature &Sig)
void localDecl(const SmallVectorImpl< wasm::ValType > &Locals)
bool typeCheck(SMLoc ErrorLoc, const MCInst &Inst, OperandVector &Operands)
WebAssembly-specific streamer interface, to implement support WebAssembly-specific assembly directive...
virtual void emitLocal(ArrayRef< wasm::ValType > Types)=0
.local
This class implements an extremely fast bulk output stream that can only output to a stream.
Definition: raw_ostream.h:52
A raw_ostream that writes to an SmallVector or SmallString.
Definition: raw_ostream.h:691
#define llvm_unreachable(msg)
Marks that the current location is not supposed to be reachable.
constexpr char TypeName[]
Key for Kernel::Arg::Metadata::mTypeName.
int getWasm64Opcode(unsigned short Opcode)
BlockType parseBlockType(StringRef Type)
BlockType
Used as immediate MachineOperands for block signatures.
unsigned GetDefaultP2AlignAny(unsigned Opc)
Return the default p2align value for a load or store with the given opcode.
std::optional< wasm::ValType > parseType(StringRef Type)
@ WASM_LIMITS_FLAG_HAS_MAX
Definition: Wasm.h:149
@ WASM_LIMITS_FLAG_IS_64
Definition: Wasm.h:151
@ WASM_LIMITS_FLAG_NONE
Definition: Wasm.h:148
@ WASM_SYMBOL_TYPE_GLOBAL
Definition: Wasm.h:211
@ WASM_SYMBOL_TYPE_DATA
Definition: Wasm.h:210
@ WASM_SYMBOL_TYPE_TAG
Definition: Wasm.h:213
@ WASM_SYMBOL_TYPE_TABLE
Definition: Wasm.h:214
@ WASM_SYMBOL_TYPE_FUNCTION
Definition: Wasm.h:209
This is an optimization pass for GlobalISel generic memory operations.
Definition: AddressRanges.h:18
Target & getTheWebAssemblyTarget32()
Target & getTheWebAssemblyTarget64()
@ MCSA_NoDeadStrip
.no_dead_strip (MachO)
Definition: MCDirectives.h:39
#define N
This struct is a compact representation of a valid (non-zero power of two) alignment.
Definition: Alignment.h:39
RegisterMCAsmParser - Helper template for registering a target specific assembly parser,...
uint64_t Minimum
Definition: Wasm.h:311
uint64_t Maximum
Definition: Wasm.h:312
SmallVector< ValType, 1 > Returns
Definition: Wasm.h:488
SmallVector< ValType, 4 > Params
Definition: Wasm.h:489