LLVM  8.0.0svn
MCExpr.h
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1 //===- MCExpr.h - Assembly Level Expressions --------------------*- C++ -*-===//
2 //
3 // The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 
10 #ifndef LLVM_MC_MCEXPR_H
11 #define LLVM_MC_MCEXPR_H
12 
13 #include "llvm/ADT/DenseMap.h"
14 #include "llvm/Support/SMLoc.h"
15 #include <cstdint>
16 
17 namespace llvm {
18 
19 class MCAsmInfo;
20 class MCAsmLayout;
21 class MCAssembler;
22 class MCContext;
23 class MCFixup;
24 class MCFragment;
25 class MCSection;
26 class MCStreamer;
27 class MCSymbol;
28 class MCValue;
29 class raw_ostream;
30 class StringRef;
31 
33 
34 /// Base class for the full range of assembler expressions which are
35 /// needed for parsing.
36 class MCExpr {
37 public:
38  enum ExprKind {
39  Binary, ///< Binary expressions.
40  Constant, ///< Constant expressions.
41  SymbolRef, ///< References to labels and assigned expressions.
42  Unary, ///< Unary expressions.
43  Target ///< Target specific expression.
44  };
45 
46 private:
47  ExprKind Kind;
48  SMLoc Loc;
49 
50  bool evaluateAsAbsolute(int64_t &Res, const MCAssembler *Asm,
51  const MCAsmLayout *Layout,
52  const SectionAddrMap *Addrs) const;
53 
54  bool evaluateAsAbsolute(int64_t &Res, const MCAssembler *Asm,
55  const MCAsmLayout *Layout,
56  const SectionAddrMap *Addrs, bool InSet) const;
57 
58 protected:
59  explicit MCExpr(ExprKind Kind, SMLoc Loc) : Kind(Kind), Loc(Loc) {}
60 
62  const MCAsmLayout *Layout,
63  const MCFixup *Fixup,
64  const SectionAddrMap *Addrs, bool InSet) const;
65 
66 public:
67  MCExpr(const MCExpr &) = delete;
68  MCExpr &operator=(const MCExpr &) = delete;
69 
70  /// \name Accessors
71  /// @{
72 
73  ExprKind getKind() const { return Kind; }
74  SMLoc getLoc() const { return Loc; }
75 
76  /// @}
77  /// \name Utility Methods
78  /// @{
79 
80  void print(raw_ostream &OS, const MCAsmInfo *MAI,
81  bool InParens = false) const;
82  void dump() const;
83 
84  /// @}
85  /// \name Expression Evaluation
86  /// @{
87 
88  /// Try to evaluate the expression to an absolute value.
89  ///
90  /// \param Res - The absolute value, if evaluation succeeds.
91  /// \param Layout - The assembler layout object to use for evaluating symbol
92  /// values. If not given, then only non-symbolic expressions will be
93  /// evaluated.
94  /// \return - True on success.
95  bool evaluateAsAbsolute(int64_t &Res, const MCAsmLayout &Layout,
96  const SectionAddrMap &Addrs) const;
97  bool evaluateAsAbsolute(int64_t &Res) const;
98  bool evaluateAsAbsolute(int64_t &Res, const MCAssembler &Asm) const;
99  bool evaluateAsAbsolute(int64_t &Res, const MCAssembler *Asm) const;
100  bool evaluateAsAbsolute(int64_t &Res, const MCAsmLayout &Layout) const;
101 
102  bool evaluateKnownAbsolute(int64_t &Res, const MCAsmLayout &Layout) const;
103 
104  /// Try to evaluate the expression to a relocatable value, i.e. an
105  /// expression of the fixed form (a - b + constant).
106  ///
107  /// \param Res - The relocatable value, if evaluation succeeds.
108  /// \param Layout - The assembler layout object to use for evaluating values.
109  /// \param Fixup - The Fixup object if available.
110  /// \return - True on success.
111  bool evaluateAsRelocatable(MCValue &Res, const MCAsmLayout *Layout,
112  const MCFixup *Fixup) const;
113 
114  /// Try to evaluate the expression to the form (a - b + constant) where
115  /// neither a nor b are variables.
116  ///
117  /// This is a more aggressive variant of evaluateAsRelocatable. The intended
118  /// use is for when relocations are not available, like the .size directive.
119  bool evaluateAsValue(MCValue &Res, const MCAsmLayout &Layout) const;
120 
121  /// Find the "associated section" for this expression, which is
122  /// currently defined as the absolute section for constants, or
123  /// otherwise the section associated with the first defined symbol in the
124  /// expression.
126 
127  /// @}
128 };
129 
130 inline raw_ostream &operator<<(raw_ostream &OS, const MCExpr &E) {
131  E.print(OS, nullptr);
132  return OS;
133 }
134 
135 //// Represent a constant integer expression.
136 class MCConstantExpr : public MCExpr {
137  int64_t Value;
138 
139  explicit MCConstantExpr(int64_t Value)
140  : MCExpr(MCExpr::Constant, SMLoc()), Value(Value) {}
141 
142 public:
143  /// \name Construction
144  /// @{
145 
146  static const MCConstantExpr *create(int64_t Value, MCContext &Ctx);
147 
148  /// @}
149  /// \name Accessors
150  /// @{
151 
152  int64_t getValue() const { return Value; }
153 
154  /// @}
155 
156  static bool classof(const MCExpr *E) {
157  return E->getKind() == MCExpr::Constant;
158  }
159 };
160 
161 /// Represent a reference to a symbol from inside an expression.
162 ///
163 /// A symbol reference in an expression may be a use of a label, a use of an
164 /// assembler variable (defined constant), or constitute an implicit definition
165 /// of the symbol as external.
166 class MCSymbolRefExpr : public MCExpr {
167 public:
168  enum VariantKind : uint16_t {
171 
186  VK_TLSCALL, // symbol(tlscall)
187  VK_TLSDESC, // symbol(tlsdesc)
188  VK_TLVP, // Mach-O thread local variable relocations
196  VK_SIZE, // symbol@SIZE
197  VK_WEAKREF, // The link between the symbols in .weakref foo, bar
198 
200 
206  VK_ARM_SBREL, // symbol(sbrel)
207  VK_ARM_TLSLDO, // symbol(tlsldo)
209 
217 
218  VK_PPC_LO, // symbol@l
219  VK_PPC_HI, // symbol@h
220  VK_PPC_HA, // symbol@ha
221  VK_PPC_HIGH, // symbol@high
222  VK_PPC_HIGHA, // symbol@higha
223  VK_PPC_HIGHER, // symbol@higher
224  VK_PPC_HIGHERA, // symbol@highera
225  VK_PPC_HIGHEST, // symbol@highest
226  VK_PPC_HIGHESTA, // symbol@highesta
227  VK_PPC_GOT_LO, // symbol@got@l
228  VK_PPC_GOT_HI, // symbol@got@h
229  VK_PPC_GOT_HA, // symbol@got@ha
230  VK_PPC_TOCBASE, // symbol@tocbase
231  VK_PPC_TOC, // symbol@toc
232  VK_PPC_TOC_LO, // symbol@toc@l
233  VK_PPC_TOC_HI, // symbol@toc@h
234  VK_PPC_TOC_HA, // symbol@toc@ha
235  VK_PPC_DTPMOD, // symbol@dtpmod
236  VK_PPC_TPREL_LO, // symbol@tprel@l
237  VK_PPC_TPREL_HI, // symbol@tprel@h
238  VK_PPC_TPREL_HA, // symbol@tprel@ha
239  VK_PPC_TPREL_HIGH, // symbol@tprel@high
240  VK_PPC_TPREL_HIGHA, // symbol@tprel@higha
241  VK_PPC_TPREL_HIGHER, // symbol@tprel@higher
242  VK_PPC_TPREL_HIGHERA, // symbol@tprel@highera
243  VK_PPC_TPREL_HIGHEST, // symbol@tprel@highest
244  VK_PPC_TPREL_HIGHESTA, // symbol@tprel@highesta
245  VK_PPC_DTPREL_LO, // symbol@dtprel@l
246  VK_PPC_DTPREL_HI, // symbol@dtprel@h
247  VK_PPC_DTPREL_HA, // symbol@dtprel@ha
248  VK_PPC_DTPREL_HIGH, // symbol@dtprel@high
249  VK_PPC_DTPREL_HIGHA, // symbol@dtprel@higha
250  VK_PPC_DTPREL_HIGHER, // symbol@dtprel@higher
251  VK_PPC_DTPREL_HIGHERA, // symbol@dtprel@highera
252  VK_PPC_DTPREL_HIGHEST, // symbol@dtprel@highest
253  VK_PPC_DTPREL_HIGHESTA,// symbol@dtprel@highesta
254  VK_PPC_GOT_TPREL, // symbol@got@tprel
255  VK_PPC_GOT_TPREL_LO, // symbol@got@tprel@l
256  VK_PPC_GOT_TPREL_HI, // symbol@got@tprel@h
257  VK_PPC_GOT_TPREL_HA, // symbol@got@tprel@ha
258  VK_PPC_GOT_DTPREL, // symbol@got@dtprel
259  VK_PPC_GOT_DTPREL_LO, // symbol@got@dtprel@l
260  VK_PPC_GOT_DTPREL_HI, // symbol@got@dtprel@h
261  VK_PPC_GOT_DTPREL_HA, // symbol@got@dtprel@ha
262  VK_PPC_TLS, // symbol@tls
263  VK_PPC_GOT_TLSGD, // symbol@got@tlsgd
264  VK_PPC_GOT_TLSGD_LO, // symbol@got@tlsgd@l
265  VK_PPC_GOT_TLSGD_HI, // symbol@got@tlsgd@h
266  VK_PPC_GOT_TLSGD_HA, // symbol@got@tlsgd@ha
267  VK_PPC_TLSGD, // symbol@tlsgd
268  VK_PPC_GOT_TLSLD, // symbol@got@tlsld
269  VK_PPC_GOT_TLSLD_LO, // symbol@got@tlsld@l
270  VK_PPC_GOT_TLSLD_HI, // symbol@got@tlsld@h
271  VK_PPC_GOT_TLSLD_HA, // symbol@got@tlsld@ha
272  VK_PPC_TLSLD, // symbol@tlsld
273  VK_PPC_LOCAL, // symbol@local
274 
275  VK_COFF_IMGREL32, // symbol@imgrel (image-relative)
276 
287 
288  VK_WebAssembly_FUNCTION, // Function table index, rather than virtual addr
289  VK_WebAssembly_GLOBAL, // Global object index
290  VK_WebAssembly_TYPEINDEX,// Type table index
291 
292  VK_AMDGPU_GOTPCREL32_LO, // symbol@gotpcrel32@lo
293  VK_AMDGPU_GOTPCREL32_HI, // symbol@gotpcrel32@hi
294  VK_AMDGPU_REL32_LO, // symbol@rel32@lo
295  VK_AMDGPU_REL32_HI, // symbol@rel32@hi
296  VK_AMDGPU_REL64, // symbol@rel64
297 
299  VK_DTPREL
300  };
301 
302 private:
303  /// The symbol reference modifier.
304  const VariantKind Kind;
305 
306  /// Specifies how the variant kind should be printed.
307  const unsigned UseParensForSymbolVariant : 1;
308 
309  // FIXME: Remove this bit.
310  const unsigned HasSubsectionsViaSymbols : 1;
311 
312  /// The symbol being referenced.
313  const MCSymbol *Symbol;
314 
315  explicit MCSymbolRefExpr(const MCSymbol *Symbol, VariantKind Kind,
316  const MCAsmInfo *MAI, SMLoc Loc = SMLoc());
317 
318 public:
319  /// \name Construction
320  /// @{
321 
322  static const MCSymbolRefExpr *create(const MCSymbol *Symbol, MCContext &Ctx) {
323  return MCSymbolRefExpr::create(Symbol, VK_None, Ctx);
324  }
325 
326  static const MCSymbolRefExpr *create(const MCSymbol *Symbol, VariantKind Kind,
327  MCContext &Ctx, SMLoc Loc = SMLoc());
328  static const MCSymbolRefExpr *create(StringRef Name, VariantKind Kind,
329  MCContext &Ctx);
330 
331  /// @}
332  /// \name Accessors
333  /// @{
334 
335  const MCSymbol &getSymbol() const { return *Symbol; }
336 
337  VariantKind getKind() const { return Kind; }
338 
339  void printVariantKind(raw_ostream &OS) const;
340 
341  bool hasSubsectionsViaSymbols() const { return HasSubsectionsViaSymbols; }
342 
343  /// @}
344  /// \name Static Utility Functions
345  /// @{
346 
347  static StringRef getVariantKindName(VariantKind Kind);
348 
349  static VariantKind getVariantKindForName(StringRef Name);
350 
351  /// @}
352 
353  static bool classof(const MCExpr *E) {
354  return E->getKind() == MCExpr::SymbolRef;
355  }
356 };
357 
358 /// Unary assembler expressions.
359 class MCUnaryExpr : public MCExpr {
360 public:
361  enum Opcode {
362  LNot, ///< Logical negation.
363  Minus, ///< Unary minus.
364  Not, ///< Bitwise negation.
365  Plus ///< Unary plus.
366  };
367 
368 private:
369  Opcode Op;
370  const MCExpr *Expr;
371 
372  MCUnaryExpr(Opcode Op, const MCExpr *Expr, SMLoc Loc)
373  : MCExpr(MCExpr::Unary, Loc), Op(Op), Expr(Expr) {}
374 
375 public:
376  /// \name Construction
377  /// @{
378 
379  static const MCUnaryExpr *create(Opcode Op, const MCExpr *Expr,
380  MCContext &Ctx, SMLoc Loc = SMLoc());
381 
382  static const MCUnaryExpr *createLNot(const MCExpr *Expr, MCContext &Ctx, SMLoc Loc = SMLoc()) {
383  return create(LNot, Expr, Ctx, Loc);
384  }
385 
386  static const MCUnaryExpr *createMinus(const MCExpr *Expr, MCContext &Ctx, SMLoc Loc = SMLoc()) {
387  return create(Minus, Expr, Ctx, Loc);
388  }
389 
390  static const MCUnaryExpr *createNot(const MCExpr *Expr, MCContext &Ctx, SMLoc Loc = SMLoc()) {
391  return create(Not, Expr, Ctx, Loc);
392  }
393 
394  static const MCUnaryExpr *createPlus(const MCExpr *Expr, MCContext &Ctx, SMLoc Loc = SMLoc()) {
395  return create(Plus, Expr, Ctx, Loc);
396  }
397 
398  /// @}
399  /// \name Accessors
400  /// @{
401 
402  /// Get the kind of this unary expression.
403  Opcode getOpcode() const { return Op; }
404 
405  /// Get the child of this unary expression.
406  const MCExpr *getSubExpr() const { return Expr; }
407 
408  /// @}
409 
410  static bool classof(const MCExpr *E) {
411  return E->getKind() == MCExpr::Unary;
412  }
413 };
414 
415 /// Binary assembler expressions.
416 class MCBinaryExpr : public MCExpr {
417 public:
418  enum Opcode {
419  Add, ///< Addition.
420  And, ///< Bitwise and.
421  Div, ///< Signed division.
422  EQ, ///< Equality comparison.
423  GT, ///< Signed greater than comparison (result is either 0 or some
424  ///< target-specific non-zero value)
425  GTE, ///< Signed greater than or equal comparison (result is either 0 or
426  ///< some target-specific non-zero value).
427  LAnd, ///< Logical and.
428  LOr, ///< Logical or.
429  LT, ///< Signed less than comparison (result is either 0 or
430  ///< some target-specific non-zero value).
431  LTE, ///< Signed less than or equal comparison (result is either 0 or
432  ///< some target-specific non-zero value).
433  Mod, ///< Signed remainder.
434  Mul, ///< Multiplication.
435  NE, ///< Inequality comparison.
436  Or, ///< Bitwise or.
437  Shl, ///< Shift left.
438  AShr, ///< Arithmetic shift right.
439  LShr, ///< Logical shift right.
440  Sub, ///< Subtraction.
441  Xor ///< Bitwise exclusive or.
442  };
443 
444 private:
445  Opcode Op;
446  const MCExpr *LHS, *RHS;
447 
448  MCBinaryExpr(Opcode Op, const MCExpr *LHS, const MCExpr *RHS,
449  SMLoc Loc = SMLoc())
450  : MCExpr(MCExpr::Binary, Loc), Op(Op), LHS(LHS), RHS(RHS) {}
451 
452 public:
453  /// \name Construction
454  /// @{
455 
456  static const MCBinaryExpr *create(Opcode Op, const MCExpr *LHS,
457  const MCExpr *RHS, MCContext &Ctx,
458  SMLoc Loc = SMLoc());
459 
460  static const MCBinaryExpr *createAdd(const MCExpr *LHS, const MCExpr *RHS,
461  MCContext &Ctx) {
462  return create(Add, LHS, RHS, Ctx);
463  }
464 
465  static const MCBinaryExpr *createAnd(const MCExpr *LHS, const MCExpr *RHS,
466  MCContext &Ctx) {
467  return create(And, LHS, RHS, Ctx);
468  }
469 
470  static const MCBinaryExpr *createDiv(const MCExpr *LHS, const MCExpr *RHS,
471  MCContext &Ctx) {
472  return create(Div, LHS, RHS, Ctx);
473  }
474 
475  static const MCBinaryExpr *createEQ(const MCExpr *LHS, const MCExpr *RHS,
476  MCContext &Ctx) {
477  return create(EQ, LHS, RHS, Ctx);
478  }
479 
480  static const MCBinaryExpr *createGT(const MCExpr *LHS, const MCExpr *RHS,
481  MCContext &Ctx) {
482  return create(GT, LHS, RHS, Ctx);
483  }
484 
485  static const MCBinaryExpr *createGTE(const MCExpr *LHS, const MCExpr *RHS,
486  MCContext &Ctx) {
487  return create(GTE, LHS, RHS, Ctx);
488  }
489 
490  static const MCBinaryExpr *createLAnd(const MCExpr *LHS, const MCExpr *RHS,
491  MCContext &Ctx) {
492  return create(LAnd, LHS, RHS, Ctx);
493  }
494 
495  static const MCBinaryExpr *createLOr(const MCExpr *LHS, const MCExpr *RHS,
496  MCContext &Ctx) {
497  return create(LOr, LHS, RHS, Ctx);
498  }
499 
500  static const MCBinaryExpr *createLT(const MCExpr *LHS, const MCExpr *RHS,
501  MCContext &Ctx) {
502  return create(LT, LHS, RHS, Ctx);
503  }
504 
505  static const MCBinaryExpr *createLTE(const MCExpr *LHS, const MCExpr *RHS,
506  MCContext &Ctx) {
507  return create(LTE, LHS, RHS, Ctx);
508  }
509 
510  static const MCBinaryExpr *createMod(const MCExpr *LHS, const MCExpr *RHS,
511  MCContext &Ctx) {
512  return create(Mod, LHS, RHS, Ctx);
513  }
514 
515  static const MCBinaryExpr *createMul(const MCExpr *LHS, const MCExpr *RHS,
516  MCContext &Ctx) {
517  return create(Mul, LHS, RHS, Ctx);
518  }
519 
520  static const MCBinaryExpr *createNE(const MCExpr *LHS, const MCExpr *RHS,
521  MCContext &Ctx) {
522  return create(NE, LHS, RHS, Ctx);
523  }
524 
525  static const MCBinaryExpr *createOr(const MCExpr *LHS, const MCExpr *RHS,
526  MCContext &Ctx) {
527  return create(Or, LHS, RHS, Ctx);
528  }
529 
530  static const MCBinaryExpr *createShl(const MCExpr *LHS, const MCExpr *RHS,
531  MCContext &Ctx) {
532  return create(Shl, LHS, RHS, Ctx);
533  }
534 
535  static const MCBinaryExpr *createAShr(const MCExpr *LHS, const MCExpr *RHS,
536  MCContext &Ctx) {
537  return create(AShr, LHS, RHS, Ctx);
538  }
539 
540  static const MCBinaryExpr *createLShr(const MCExpr *LHS, const MCExpr *RHS,
541  MCContext &Ctx) {
542  return create(LShr, LHS, RHS, Ctx);
543  }
544 
545  static const MCBinaryExpr *createSub(const MCExpr *LHS, const MCExpr *RHS,
546  MCContext &Ctx) {
547  return create(Sub, LHS, RHS, Ctx);
548  }
549 
550  static const MCBinaryExpr *createXor(const MCExpr *LHS, const MCExpr *RHS,
551  MCContext &Ctx) {
552  return create(Xor, LHS, RHS, Ctx);
553  }
554 
555  /// @}
556  /// \name Accessors
557  /// @{
558 
559  /// Get the kind of this binary expression.
560  Opcode getOpcode() const { return Op; }
561 
562  /// Get the left-hand side expression of the binary operator.
563  const MCExpr *getLHS() const { return LHS; }
564 
565  /// Get the right-hand side expression of the binary operator.
566  const MCExpr *getRHS() const { return RHS; }
567 
568  /// @}
569 
570  static bool classof(const MCExpr *E) {
571  return E->getKind() == MCExpr::Binary;
572  }
573 };
574 
575 /// This is an extension point for target-specific MCExpr subclasses to
576 /// implement.
577 ///
578 /// NOTE: All subclasses are required to have trivial destructors because
579 /// MCExprs are bump pointer allocated and not destructed.
580 class MCTargetExpr : public MCExpr {
581  virtual void anchor();
582 
583 protected:
585  virtual ~MCTargetExpr() = default;
586 
587 public:
588  virtual void printImpl(raw_ostream &OS, const MCAsmInfo *MAI) const = 0;
589  virtual bool evaluateAsRelocatableImpl(MCValue &Res,
590  const MCAsmLayout *Layout,
591  const MCFixup *Fixup) const = 0;
592  // allow Target Expressions to be checked for equality
593  virtual bool isEqualTo(const MCExpr *x) const { return false; }
594  // This should be set when assigned expressions are not valid ".set"
595  // expressions, e.g. registers, and must be inlined.
596  virtual bool inlineAssignedExpr() const { return false; }
597  virtual void visitUsedExpr(MCStreamer& Streamer) const = 0;
598  virtual MCFragment *findAssociatedFragment() const = 0;
599 
600  virtual void fixELFSymbolsInTLSFixups(MCAssembler &) const = 0;
601 
602  static bool classof(const MCExpr *E) {
603  return E->getKind() == MCExpr::Target;
604  }
605 };
606 
607 } // end namespace llvm
608 
609 #endif // LLVM_MC_MCEXPR_H
static const MCUnaryExpr * createLNot(const MCExpr *Expr, MCContext &Ctx, SMLoc Loc=SMLoc())
Definition: MCExpr.h:382
static const MCBinaryExpr * createGT(const MCExpr *LHS, const MCExpr *RHS, MCContext &Ctx)
Definition: MCExpr.h:480
static const MCBinaryExpr * createEQ(const MCExpr *LHS, const MCExpr *RHS, MCContext &Ctx)
Definition: MCExpr.h:475
Bitwise negation.
Definition: MCExpr.h:364
static const MCSymbolRefExpr * create(const MCSymbol *Symbol, MCContext &Ctx)
Definition: MCExpr.h:322
Compute iterated dominance frontiers using a linear time algorithm.
Definition: AllocatorList.h:24
This represents an "assembler immediate".
Definition: MCValue.h:40
MCSymbol - Instances of this class represent a symbol name in the MC file, and MCSymbols are created ...
Definition: MCSymbol.h:42
VariantKind getKind() const
Definition: MCExpr.h:337
Bitwise and.
Definition: MCExpr.h:420
Multiplication.
Definition: MCExpr.h:434
Opcode getOpcode() const
Get the kind of this unary expression.
Definition: MCExpr.h:403
const MCExpr * getLHS() const
Get the left-hand side expression of the binary operator.
Definition: MCExpr.h:563
static const MCBinaryExpr * createAnd(const MCExpr *LHS, const MCExpr *RHS, MCContext &Ctx)
Definition: MCExpr.h:465
static const MCBinaryExpr * createMul(const MCExpr *LHS, const MCExpr *RHS, MCContext &Ctx)
Definition: MCExpr.h:515
Equality comparison.
Definition: MCExpr.h:422
Bitwise or.
Definition: MCExpr.h:436
SMLoc getLoc() const
Definition: MCExpr.h:74
Encode information on a single operation to perform on a byte sequence (e.g., an encoded instruction)...
Definition: MCFixup.h:74
static const MCBinaryExpr * createXor(const MCExpr *LHS, const MCExpr *RHS, MCContext &Ctx)
Definition: MCExpr.h:550
Encapsulates the layout of an assembly file at a particular point in time.
Definition: MCAsmLayout.h:29
static const MCBinaryExpr * createDiv(const MCExpr *LHS, const MCExpr *RHS, MCContext &Ctx)
Definition: MCExpr.h:470
Base class for the full range of assembler expressions which are needed for parsing.
Definition: MCExpr.h:36
This is an extension point for target-specific MCExpr subclasses to implement.
Definition: MCExpr.h:580
Represent a reference to a symbol from inside an expression.
Definition: MCExpr.h:166
static const MCBinaryExpr * createAShr(const MCExpr *LHS, const MCExpr *RHS, MCContext &Ctx)
Definition: MCExpr.h:535
Context object for machine code objects.
Definition: MCContext.h:63
static const MCBinaryExpr * createShl(const MCExpr *LHS, const MCExpr *RHS, MCContext &Ctx)
Definition: MCExpr.h:530
virtual bool inlineAssignedExpr() const
Definition: MCExpr.h:596
static const MCBinaryExpr * createLOr(const MCExpr *LHS, const MCExpr *RHS, MCContext &Ctx)
Definition: MCExpr.h:495
Arithmetic shift right.
Definition: MCExpr.h:438
static const MCBinaryExpr * createSub(const MCExpr *LHS, const MCExpr *RHS, MCContext &Ctx)
Definition: MCExpr.h:545
bool evaluateAsRelocatable(MCValue &Res, const MCAsmLayout *Layout, const MCFixup *Fixup) const
Try to evaluate the expression to a relocatable value, i.e.
Definition: MCExpr.cpp:634
const MCExpr * getRHS() const
Get the right-hand side expression of the binary operator.
Definition: MCExpr.h:566
Logical or.
Definition: MCExpr.h:428
Signed remainder.
Definition: MCExpr.h:433
static bool classof(const MCExpr *E)
Definition: MCExpr.h:156
Unary assembler expressions.
Definition: MCExpr.h:359
void dump() const
Definition: MCExpr.cpp:145
Signed division.
Definition: MCExpr.h:421
#define EQ(a, b)
Definition: regexec.c:112
static const MCBinaryExpr * createAdd(const MCExpr *LHS, const MCExpr *RHS, MCContext &Ctx)
Definition: MCExpr.h:460
Unary expressions.
Definition: MCExpr.h:42
Shift left.
Definition: MCExpr.h:437
This class is intended to be used as a base class for asm properties and features specific to the tar...
Definition: MCAsmInfo.h:56
int64_t getValue() const
Definition: MCExpr.h:152
static const MCUnaryExpr * createPlus(const MCExpr *Expr, MCContext &Ctx, SMLoc Loc=SMLoc())
Definition: MCExpr.h:394
Streaming machine code generation interface.
Definition: MCStreamer.h:183
bool evaluateKnownAbsolute(int64_t &Res, const MCAsmLayout &Layout) const
Definition: MCExpr.cpp:467
void print(raw_ostream &OS, const MCAsmInfo *MAI, bool InParens=false) const
Definition: MCExpr.cpp:42
static GCRegistry::Add< CoreCLRGC > E("coreclr", "CoreCLR-compatible GC")
static const MCBinaryExpr * createOr(const MCExpr *LHS, const MCExpr *RHS, MCContext &Ctx)
Definition: MCExpr.h:525
Logical negation.
Definition: MCExpr.h:362
Logical and.
Definition: MCExpr.h:427
Binary assembler expressions.
Definition: MCExpr.h:416
bool hasSubsectionsViaSymbols() const
Definition: MCExpr.h:341
static const MCBinaryExpr * createLShr(const MCExpr *LHS, const MCExpr *RHS, MCContext &Ctx)
Definition: MCExpr.h:540
static const MCUnaryExpr * createMinus(const MCExpr *Expr, MCContext &Ctx, SMLoc Loc=SMLoc())
Definition: MCExpr.h:386
PowerPC TLS Dynamic Call Fixup
static bool classof(const MCExpr *E)
Definition: MCExpr.h:570
const MCSymbol & getSymbol() const
Definition: MCExpr.h:335
ExprKind getKind() const
Definition: MCExpr.h:73
static const MCBinaryExpr * createLT(const MCExpr *LHS, const MCExpr *RHS, MCContext &Ctx)
Definition: MCExpr.h:500
static bool classof(const MCExpr *E)
Definition: MCExpr.h:602
bool evaluateAsRelocatableImpl(MCValue &Res, const MCAssembler *Asm, const MCAsmLayout *Layout, const MCFixup *Fixup, const SectionAddrMap *Addrs, bool InSet) const
Definition: MCExpr.cpp:661
Inequality comparison.
Definition: MCExpr.h:435
MCExpr & operator=(const MCExpr &)=delete
MCFragment * findAssociatedFragment() const
Find the "associated section" for this expression, which is currently defined as the absolute section...
Definition: MCExpr.cpp:854
The access may modify the value stored in memory.
Target - Wrapper for Target specific information.
static const MCBinaryExpr * createLAnd(const MCExpr *LHS, const MCExpr *RHS, MCContext &Ctx)
Definition: MCExpr.h:490
Logical shift right.
Definition: MCExpr.h:439
static const MCBinaryExpr * createNE(const MCExpr *LHS, const MCExpr *RHS, MCContext &Ctx)
Definition: MCExpr.h:520
static const MCBinaryExpr * createLTE(const MCExpr *LHS, const MCExpr *RHS, MCContext &Ctx)
Definition: MCExpr.h:505
static const MCUnaryExpr * createNot(const MCExpr *Expr, MCContext &Ctx, SMLoc Loc=SMLoc())
Definition: MCExpr.h:390
static const MCBinaryExpr * createMod(const MCExpr *LHS, const MCExpr *RHS, MCContext &Ctx)
Definition: MCExpr.h:510
References to labels and assigned expressions.
Definition: MCExpr.h:41
Unary minus.
Definition: MCExpr.h:363
bool evaluateAsValue(MCValue &Res, const MCAsmLayout &Layout) const
Try to evaluate the expression to the form (a - b + constant) where neither a nor b are variables...
Definition: MCExpr.cpp:642
raw_ostream & operator<<(raw_ostream &OS, const APInt &I)
Definition: APInt.h:2033
virtual bool isEqualTo(const MCExpr *x) const
Definition: MCExpr.h:593
static bool classof(const MCExpr *E)
Definition: MCExpr.h:410
Opcode getOpcode() const
Get the kind of this binary expression.
Definition: MCExpr.h:560
const MCExpr * getSubExpr() const
Get the child of this unary expression.
Definition: MCExpr.h:406
LLVM Value Representation.
Definition: Value.h:73
Constant expressions.
Definition: MCExpr.h:40
Binary expressions.
Definition: MCExpr.h:39
This class implements an extremely fast bulk output stream that can only output to a stream...
Definition: raw_ostream.h:46
Subtraction.
Definition: MCExpr.h:440
StringRef - Represent a constant reference to a string, i.e.
Definition: StringRef.h:49
Target specific expression.
Definition: MCExpr.h:43
static bool classof(const MCExpr *E)
Definition: MCExpr.h:353
Represents a location in source code.
Definition: SMLoc.h:24
MCExpr(ExprKind Kind, SMLoc Loc)
Definition: MCExpr.h:59
static const MCBinaryExpr * createGTE(const MCExpr *LHS, const MCExpr *RHS, MCContext &Ctx)
Definition: MCExpr.h:485