LLVM  7.0.0svn
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 /// \brief 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  /// \brief 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 MCAsmLayout &Layout) const;
100 
101  bool evaluateKnownAbsolute(int64_t &Res, const MCAsmLayout &Layout) const;
102 
103  /// \brief Try to evaluate the expression to a relocatable value, i.e. an
104  /// expression of the fixed form (a - b + constant).
105  ///
106  /// \param Res - The relocatable value, if evaluation succeeds.
107  /// \param Layout - The assembler layout object to use for evaluating values.
108  /// \param Fixup - The Fixup object if available.
109  /// \return - True on success.
110  bool evaluateAsRelocatable(MCValue &Res, const MCAsmLayout *Layout,
111  const MCFixup *Fixup) const;
112 
113  /// \brief Try to evaluate the expression to the form (a - b + constant) where
114  /// neither a nor b are variables.
115  ///
116  /// This is a more aggressive variant of evaluateAsRelocatable. The intended
117  /// use is for when relocations are not available, like the .size directive.
118  bool evaluateAsValue(MCValue &Res, const MCAsmLayout &Layout) const;
119 
120  /// \brief Find the "associated section" for this expression, which is
121  /// currently defined as the absolute section for constants, or
122  /// otherwise the section associated with the first defined symbol in the
123  /// expression.
125 
126  /// @}
127 };
128 
129 inline raw_ostream &operator<<(raw_ostream &OS, const MCExpr &E) {
130  E.print(OS, nullptr);
131  return OS;
132 }
133 
134 //// \brief Represent a constant integer expression.
135 class MCConstantExpr : public MCExpr {
136  int64_t Value;
137 
138  explicit MCConstantExpr(int64_t Value)
139  : MCExpr(MCExpr::Constant, SMLoc()), Value(Value) {}
140 
141 public:
142  /// \name Construction
143  /// @{
144 
145  static const MCConstantExpr *create(int64_t Value, MCContext &Ctx);
146 
147  /// @}
148  /// \name Accessors
149  /// @{
150 
151  int64_t getValue() const { return Value; }
152 
153  /// @}
154 
155  static bool classof(const MCExpr *E) {
156  return E->getKind() == MCExpr::Constant;
157  }
158 };
159 
160 /// \brief Represent a reference to a symbol from inside an expression.
161 ///
162 /// A symbol reference in an expression may be a use of a label, a use of an
163 /// assembler variable (defined constant), or constitute an implicit definition
164 /// of the symbol as external.
165 class MCSymbolRefExpr : public MCExpr {
166 public:
167  enum VariantKind : uint16_t {
170 
185  VK_TLSCALL, // symbol(tlscall)
186  VK_TLSDESC, // symbol(tlsdesc)
187  VK_TLVP, // Mach-O thread local variable relocations
195  VK_SIZE, // symbol@SIZE
196  VK_WEAKREF, // The link between the symbols in .weakref foo, bar
197 
199 
205  VK_ARM_SBREL, // symbol(sbrel)
206  VK_ARM_TLSLDO, // symbol(tlsldo)
208 
216 
217  VK_PPC_LO, // symbol@l
218  VK_PPC_HI, // symbol@h
219  VK_PPC_HA, // symbol@ha
220  VK_PPC_HIGHER, // symbol@higher
221  VK_PPC_HIGHERA, // symbol@highera
222  VK_PPC_HIGHEST, // symbol@highest
223  VK_PPC_HIGHESTA, // symbol@highesta
224  VK_PPC_GOT_LO, // symbol@got@l
225  VK_PPC_GOT_HI, // symbol@got@h
226  VK_PPC_GOT_HA, // symbol@got@ha
227  VK_PPC_TOCBASE, // symbol@tocbase
228  VK_PPC_TOC, // symbol@toc
229  VK_PPC_TOC_LO, // symbol@toc@l
230  VK_PPC_TOC_HI, // symbol@toc@h
231  VK_PPC_TOC_HA, // symbol@toc@ha
232  VK_PPC_DTPMOD, // symbol@dtpmod
233  VK_PPC_TPREL_LO, // symbol@tprel@l
234  VK_PPC_TPREL_HI, // symbol@tprel@h
235  VK_PPC_TPREL_HA, // symbol@tprel@ha
236  VK_PPC_TPREL_HIGHER, // symbol@tprel@higher
237  VK_PPC_TPREL_HIGHERA, // symbol@tprel@highera
238  VK_PPC_TPREL_HIGHEST, // symbol@tprel@highest
239  VK_PPC_TPREL_HIGHESTA, // symbol@tprel@highesta
240  VK_PPC_DTPREL_LO, // symbol@dtprel@l
241  VK_PPC_DTPREL_HI, // symbol@dtprel@h
242  VK_PPC_DTPREL_HA, // symbol@dtprel@ha
243  VK_PPC_DTPREL_HIGHER, // symbol@dtprel@higher
244  VK_PPC_DTPREL_HIGHERA, // symbol@dtprel@highera
245  VK_PPC_DTPREL_HIGHEST, // symbol@dtprel@highest
246  VK_PPC_DTPREL_HIGHESTA,// symbol@dtprel@highesta
247  VK_PPC_GOT_TPREL, // symbol@got@tprel
248  VK_PPC_GOT_TPREL_LO, // symbol@got@tprel@l
249  VK_PPC_GOT_TPREL_HI, // symbol@got@tprel@h
250  VK_PPC_GOT_TPREL_HA, // symbol@got@tprel@ha
251  VK_PPC_GOT_DTPREL, // symbol@got@dtprel
252  VK_PPC_GOT_DTPREL_LO, // symbol@got@dtprel@l
253  VK_PPC_GOT_DTPREL_HI, // symbol@got@dtprel@h
254  VK_PPC_GOT_DTPREL_HA, // symbol@got@dtprel@ha
255  VK_PPC_TLS, // symbol@tls
256  VK_PPC_GOT_TLSGD, // symbol@got@tlsgd
257  VK_PPC_GOT_TLSGD_LO, // symbol@got@tlsgd@l
258  VK_PPC_GOT_TLSGD_HI, // symbol@got@tlsgd@h
259  VK_PPC_GOT_TLSGD_HA, // symbol@got@tlsgd@ha
260  VK_PPC_TLSGD, // symbol@tlsgd
261  VK_PPC_GOT_TLSLD, // symbol@got@tlsld
262  VK_PPC_GOT_TLSLD_LO, // symbol@got@tlsld@l
263  VK_PPC_GOT_TLSLD_HI, // symbol@got@tlsld@h
264  VK_PPC_GOT_TLSLD_HA, // symbol@got@tlsld@ha
265  VK_PPC_TLSLD, // symbol@tlsld
266  VK_PPC_LOCAL, // symbol@local
267 
268  VK_COFF_IMGREL32, // symbol@imgrel (image-relative)
269 
280 
281  VK_WebAssembly_FUNCTION, // Function table index, rather than virtual addr
282  VK_WebAssembly_TYPEINDEX,// Type table index
283 
284  VK_AMDGPU_GOTPCREL32_LO, // symbol@gotpcrel32@lo
285  VK_AMDGPU_GOTPCREL32_HI, // symbol@gotpcrel32@hi
286  VK_AMDGPU_REL32_LO, // symbol@rel32@lo
287  VK_AMDGPU_REL32_HI, // symbol@rel32@hi
288 
290  VK_DTPREL
291  };
292 
293 private:
294  /// The symbol reference modifier.
295  const VariantKind Kind;
296 
297  /// Specifies how the variant kind should be printed.
298  const unsigned UseParensForSymbolVariant : 1;
299 
300  // FIXME: Remove this bit.
301  const unsigned HasSubsectionsViaSymbols : 1;
302 
303  /// The symbol being referenced.
304  const MCSymbol *Symbol;
305 
306  explicit MCSymbolRefExpr(const MCSymbol *Symbol, VariantKind Kind,
307  const MCAsmInfo *MAI, SMLoc Loc = SMLoc());
308 
309 public:
310  /// \name Construction
311  /// @{
312 
313  static const MCSymbolRefExpr *create(const MCSymbol *Symbol, MCContext &Ctx) {
314  return MCSymbolRefExpr::create(Symbol, VK_None, Ctx);
315  }
316 
317  static const MCSymbolRefExpr *create(const MCSymbol *Symbol, VariantKind Kind,
318  MCContext &Ctx, SMLoc Loc = SMLoc());
319  static const MCSymbolRefExpr *create(StringRef Name, VariantKind Kind,
320  MCContext &Ctx);
321 
322  /// @}
323  /// \name Accessors
324  /// @{
325 
326  const MCSymbol &getSymbol() const { return *Symbol; }
327 
328  VariantKind getKind() const { return Kind; }
329 
330  void printVariantKind(raw_ostream &OS) const;
331 
332  bool hasSubsectionsViaSymbols() const { return HasSubsectionsViaSymbols; }
333 
334  /// @}
335  /// \name Static Utility Functions
336  /// @{
337 
338  static StringRef getVariantKindName(VariantKind Kind);
339 
340  static VariantKind getVariantKindForName(StringRef Name);
341 
342  /// @}
343 
344  static bool classof(const MCExpr *E) {
345  return E->getKind() == MCExpr::SymbolRef;
346  }
347 };
348 
349 /// \brief Unary assembler expressions.
350 class MCUnaryExpr : public MCExpr {
351 public:
352  enum Opcode {
353  LNot, ///< Logical negation.
354  Minus, ///< Unary minus.
355  Not, ///< Bitwise negation.
356  Plus ///< Unary plus.
357  };
358 
359 private:
360  Opcode Op;
361  const MCExpr *Expr;
362 
363  MCUnaryExpr(Opcode Op, const MCExpr *Expr, SMLoc Loc)
364  : MCExpr(MCExpr::Unary, Loc), Op(Op), Expr(Expr) {}
365 
366 public:
367  /// \name Construction
368  /// @{
369 
370  static const MCUnaryExpr *create(Opcode Op, const MCExpr *Expr,
371  MCContext &Ctx, SMLoc Loc = SMLoc());
372 
373  static const MCUnaryExpr *createLNot(const MCExpr *Expr, MCContext &Ctx, SMLoc Loc = SMLoc()) {
374  return create(LNot, Expr, Ctx, Loc);
375  }
376 
377  static const MCUnaryExpr *createMinus(const MCExpr *Expr, MCContext &Ctx, SMLoc Loc = SMLoc()) {
378  return create(Minus, Expr, Ctx, Loc);
379  }
380 
381  static const MCUnaryExpr *createNot(const MCExpr *Expr, MCContext &Ctx, SMLoc Loc = SMLoc()) {
382  return create(Not, Expr, Ctx, Loc);
383  }
384 
385  static const MCUnaryExpr *createPlus(const MCExpr *Expr, MCContext &Ctx, SMLoc Loc = SMLoc()) {
386  return create(Plus, Expr, Ctx, Loc);
387  }
388 
389  /// @}
390  /// \name Accessors
391  /// @{
392 
393  /// \brief Get the kind of this unary expression.
394  Opcode getOpcode() const { return Op; }
395 
396  /// \brief Get the child of this unary expression.
397  const MCExpr *getSubExpr() const { return Expr; }
398 
399  /// @}
400 
401  static bool classof(const MCExpr *E) {
402  return E->getKind() == MCExpr::Unary;
403  }
404 };
405 
406 /// \brief Binary assembler expressions.
407 class MCBinaryExpr : public MCExpr {
408 public:
409  enum Opcode {
410  Add, ///< Addition.
411  And, ///< Bitwise and.
412  Div, ///< Signed division.
413  EQ, ///< Equality comparison.
414  GT, ///< Signed greater than comparison (result is either 0 or some
415  ///< target-specific non-zero value)
416  GTE, ///< Signed greater than or equal comparison (result is either 0 or
417  ///< some target-specific non-zero value).
418  LAnd, ///< Logical and.
419  LOr, ///< Logical or.
420  LT, ///< Signed less than comparison (result is either 0 or
421  ///< some target-specific non-zero value).
422  LTE, ///< Signed less than or equal comparison (result is either 0 or
423  ///< some target-specific non-zero value).
424  Mod, ///< Signed remainder.
425  Mul, ///< Multiplication.
426  NE, ///< Inequality comparison.
427  Or, ///< Bitwise or.
428  Shl, ///< Shift left.
429  AShr, ///< Arithmetic shift right.
430  LShr, ///< Logical shift right.
431  Sub, ///< Subtraction.
432  Xor ///< Bitwise exclusive or.
433  };
434 
435 private:
436  Opcode Op;
437  const MCExpr *LHS, *RHS;
438 
439  MCBinaryExpr(Opcode Op, const MCExpr *LHS, const MCExpr *RHS,
440  SMLoc Loc = SMLoc())
441  : MCExpr(MCExpr::Binary, Loc), Op(Op), LHS(LHS), RHS(RHS) {}
442 
443 public:
444  /// \name Construction
445  /// @{
446 
447  static const MCBinaryExpr *create(Opcode Op, const MCExpr *LHS,
448  const MCExpr *RHS, MCContext &Ctx,
449  SMLoc Loc = SMLoc());
450 
451  static const MCBinaryExpr *createAdd(const MCExpr *LHS, const MCExpr *RHS,
452  MCContext &Ctx) {
453  return create(Add, LHS, RHS, Ctx);
454  }
455 
456  static const MCBinaryExpr *createAnd(const MCExpr *LHS, const MCExpr *RHS,
457  MCContext &Ctx) {
458  return create(And, LHS, RHS, Ctx);
459  }
460 
461  static const MCBinaryExpr *createDiv(const MCExpr *LHS, const MCExpr *RHS,
462  MCContext &Ctx) {
463  return create(Div, LHS, RHS, Ctx);
464  }
465 
466  static const MCBinaryExpr *createEQ(const MCExpr *LHS, const MCExpr *RHS,
467  MCContext &Ctx) {
468  return create(EQ, LHS, RHS, Ctx);
469  }
470 
471  static const MCBinaryExpr *createGT(const MCExpr *LHS, const MCExpr *RHS,
472  MCContext &Ctx) {
473  return create(GT, LHS, RHS, Ctx);
474  }
475 
476  static const MCBinaryExpr *createGTE(const MCExpr *LHS, const MCExpr *RHS,
477  MCContext &Ctx) {
478  return create(GTE, LHS, RHS, Ctx);
479  }
480 
481  static const MCBinaryExpr *createLAnd(const MCExpr *LHS, const MCExpr *RHS,
482  MCContext &Ctx) {
483  return create(LAnd, LHS, RHS, Ctx);
484  }
485 
486  static const MCBinaryExpr *createLOr(const MCExpr *LHS, const MCExpr *RHS,
487  MCContext &Ctx) {
488  return create(LOr, LHS, RHS, Ctx);
489  }
490 
491  static const MCBinaryExpr *createLT(const MCExpr *LHS, const MCExpr *RHS,
492  MCContext &Ctx) {
493  return create(LT, LHS, RHS, Ctx);
494  }
495 
496  static const MCBinaryExpr *createLTE(const MCExpr *LHS, const MCExpr *RHS,
497  MCContext &Ctx) {
498  return create(LTE, LHS, RHS, Ctx);
499  }
500 
501  static const MCBinaryExpr *createMod(const MCExpr *LHS, const MCExpr *RHS,
502  MCContext &Ctx) {
503  return create(Mod, LHS, RHS, Ctx);
504  }
505 
506  static const MCBinaryExpr *createMul(const MCExpr *LHS, const MCExpr *RHS,
507  MCContext &Ctx) {
508  return create(Mul, LHS, RHS, Ctx);
509  }
510 
511  static const MCBinaryExpr *createNE(const MCExpr *LHS, const MCExpr *RHS,
512  MCContext &Ctx) {
513  return create(NE, LHS, RHS, Ctx);
514  }
515 
516  static const MCBinaryExpr *createOr(const MCExpr *LHS, const MCExpr *RHS,
517  MCContext &Ctx) {
518  return create(Or, LHS, RHS, Ctx);
519  }
520 
521  static const MCBinaryExpr *createShl(const MCExpr *LHS, const MCExpr *RHS,
522  MCContext &Ctx) {
523  return create(Shl, LHS, RHS, Ctx);
524  }
525 
526  static const MCBinaryExpr *createAShr(const MCExpr *LHS, const MCExpr *RHS,
527  MCContext &Ctx) {
528  return create(AShr, LHS, RHS, Ctx);
529  }
530 
531  static const MCBinaryExpr *createLShr(const MCExpr *LHS, const MCExpr *RHS,
532  MCContext &Ctx) {
533  return create(LShr, LHS, RHS, Ctx);
534  }
535 
536  static const MCBinaryExpr *createSub(const MCExpr *LHS, const MCExpr *RHS,
537  MCContext &Ctx) {
538  return create(Sub, LHS, RHS, Ctx);
539  }
540 
541  static const MCBinaryExpr *createXor(const MCExpr *LHS, const MCExpr *RHS,
542  MCContext &Ctx) {
543  return create(Xor, LHS, RHS, Ctx);
544  }
545 
546  /// @}
547  /// \name Accessors
548  /// @{
549 
550  /// \brief Get the kind of this binary expression.
551  Opcode getOpcode() const { return Op; }
552 
553  /// \brief Get the left-hand side expression of the binary operator.
554  const MCExpr *getLHS() const { return LHS; }
555 
556  /// \brief Get the right-hand side expression of the binary operator.
557  const MCExpr *getRHS() const { return RHS; }
558 
559  /// @}
560 
561  static bool classof(const MCExpr *E) {
562  return E->getKind() == MCExpr::Binary;
563  }
564 };
565 
566 /// \brief This is an extension point for target-specific MCExpr subclasses to
567 /// implement.
568 ///
569 /// NOTE: All subclasses are required to have trivial destructors because
570 /// MCExprs are bump pointer allocated and not destructed.
571 class MCTargetExpr : public MCExpr {
572  virtual void anchor();
573 
574 protected:
576  virtual ~MCTargetExpr() = default;
577 
578 public:
579  virtual void printImpl(raw_ostream &OS, const MCAsmInfo *MAI) const = 0;
580  virtual bool evaluateAsRelocatableImpl(MCValue &Res,
581  const MCAsmLayout *Layout,
582  const MCFixup *Fixup) const = 0;
583  virtual void visitUsedExpr(MCStreamer& Streamer) const = 0;
584  virtual MCFragment *findAssociatedFragment() const = 0;
585 
586  virtual void fixELFSymbolsInTLSFixups(MCAssembler &) const = 0;
587 
588  static bool classof(const MCExpr *E) {
589  return E->getKind() == MCExpr::Target;
590  }
591 };
592 
593 } // end namespace llvm
594 
595 #endif // LLVM_MC_MCEXPR_H
static const MCUnaryExpr * createLNot(const MCExpr *Expr, MCContext &Ctx, SMLoc Loc=SMLoc())
Definition: MCExpr.h:373
static const MCBinaryExpr * createGT(const MCExpr *LHS, const MCExpr *RHS, MCContext &Ctx)
Definition: MCExpr.h:471
static const MCBinaryExpr * createEQ(const MCExpr *LHS, const MCExpr *RHS, MCContext &Ctx)
Definition: MCExpr.h:466
Bitwise negation.
Definition: MCExpr.h:355
static const MCSymbolRefExpr * create(const MCSymbol *Symbol, MCContext &Ctx)
Definition: MCExpr.h:313
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:328
Bitwise and.
Definition: MCExpr.h:411
Multiplication.
Definition: MCExpr.h:425
Opcode getOpcode() const
Get the kind of this unary expression.
Definition: MCExpr.h:394
const MCExpr * getLHS() const
Get the left-hand side expression of the binary operator.
Definition: MCExpr.h:554
static const MCBinaryExpr * createAnd(const MCExpr *LHS, const MCExpr *RHS, MCContext &Ctx)
Definition: MCExpr.h:456
static const MCBinaryExpr * createMul(const MCExpr *LHS, const MCExpr *RHS, MCContext &Ctx)
Definition: MCExpr.h:506
Equality comparison.
Definition: MCExpr.h:413
Bitwise or.
Definition: MCExpr.h:427
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:66
static const MCBinaryExpr * createXor(const MCExpr *LHS, const MCExpr *RHS, MCContext &Ctx)
Definition: MCExpr.h:541
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:461
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:571
Represent a reference to a symbol from inside an expression.
Definition: MCExpr.h:165
static const MCBinaryExpr * createAShr(const MCExpr *LHS, const MCExpr *RHS, MCContext &Ctx)
Definition: MCExpr.h:526
Context object for machine code objects.
Definition: MCContext.h:60
static const MCBinaryExpr * createShl(const MCExpr *LHS, const MCExpr *RHS, MCContext &Ctx)
Definition: MCExpr.h:521
static const MCBinaryExpr * createLOr(const MCExpr *LHS, const MCExpr *RHS, MCContext &Ctx)
Definition: MCExpr.h:486
Arithmetic shift right.
Definition: MCExpr.h:429
static const MCBinaryExpr * createSub(const MCExpr *LHS, const MCExpr *RHS, MCContext &Ctx)
Definition: MCExpr.h:536
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:604
const MCExpr * getRHS() const
Get the right-hand side expression of the binary operator.
Definition: MCExpr.h:557
Logical or.
Definition: MCExpr.h:419
Signed remainder.
Definition: MCExpr.h:424
static bool classof(const MCExpr *E)
Definition: MCExpr.h:155
Unary assembler expressions.
Definition: MCExpr.h:350
void dump() const
Definition: MCExpr.cpp:140
Signed division.
Definition: MCExpr.h:412
#define EQ(a, b)
Definition: regexec.c:112
static const MCBinaryExpr * createAdd(const MCExpr *LHS, const MCExpr *RHS, MCContext &Ctx)
Definition: MCExpr.h:451
Unary expressions.
Definition: MCExpr.h:42
Shift left.
Definition: MCExpr.h:428
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:151
static const MCUnaryExpr * createPlus(const MCExpr *Expr, MCContext &Ctx, SMLoc Loc=SMLoc())
Definition: MCExpr.h:385
Streaming machine code generation interface.
Definition: MCStreamer.h:181
bool evaluateKnownAbsolute(int64_t &Res, const MCAsmLayout &Layout) const
Definition: MCExpr.cpp:441
void print(raw_ostream &OS, const MCAsmInfo *MAI, bool InParens=false) const
Definition: MCExpr.cpp:40
static GCRegistry::Add< CoreCLRGC > E("coreclr", "CoreCLR-compatible GC")
static const MCBinaryExpr * createOr(const MCExpr *LHS, const MCExpr *RHS, MCContext &Ctx)
Definition: MCExpr.h:516
Logical negation.
Definition: MCExpr.h:353
Logical and.
Definition: MCExpr.h:418
Binary assembler expressions.
Definition: MCExpr.h:407
bool hasSubsectionsViaSymbols() const
Definition: MCExpr.h:332
static const MCBinaryExpr * createLShr(const MCExpr *LHS, const MCExpr *RHS, MCContext &Ctx)
Definition: MCExpr.h:531
static const MCUnaryExpr * createMinus(const MCExpr *Expr, MCContext &Ctx, SMLoc Loc=SMLoc())
Definition: MCExpr.h:377
PowerPC TLS Dynamic Call Fixup
static bool classof(const MCExpr *E)
Definition: MCExpr.h:561
const MCSymbol & getSymbol() const
Definition: MCExpr.h:326
ExprKind getKind() const
Definition: MCExpr.h:73
static const MCBinaryExpr * createLT(const MCExpr *LHS, const MCExpr *RHS, MCContext &Ctx)
Definition: MCExpr.h:491
static bool classof(const MCExpr *E)
Definition: MCExpr.h:588
bool evaluateAsRelocatableImpl(MCValue &Res, const MCAssembler *Asm, const MCAsmLayout *Layout, const MCFixup *Fixup, const SectionAddrMap *Addrs, bool InSet) const
Definition: MCExpr.cpp:631
Inequality comparison.
Definition: MCExpr.h:426
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:792
Target - Wrapper for Target specific information.
The access may modify the value stored in memory.
static const MCBinaryExpr * createLAnd(const MCExpr *LHS, const MCExpr *RHS, MCContext &Ctx)
Definition: MCExpr.h:481
Logical shift right.
Definition: MCExpr.h:430
static const MCBinaryExpr * createNE(const MCExpr *LHS, const MCExpr *RHS, MCContext &Ctx)
Definition: MCExpr.h:511
static const MCBinaryExpr * createLTE(const MCExpr *LHS, const MCExpr *RHS, MCContext &Ctx)
Definition: MCExpr.h:496
static const MCUnaryExpr * createNot(const MCExpr *Expr, MCContext &Ctx, SMLoc Loc=SMLoc())
Definition: MCExpr.h:381
static const MCBinaryExpr * createMod(const MCExpr *LHS, const MCExpr *RHS, MCContext &Ctx)
Definition: MCExpr.h:501
References to labels and assigned expressions.
Definition: MCExpr.h:41
Unary minus.
Definition: MCExpr.h:354
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:612
raw_ostream & operator<<(raw_ostream &OS, const APInt &I)
Definition: APInt.h:2018
static bool classof(const MCExpr *E)
Definition: MCExpr.h:401
Opcode getOpcode() const
Get the kind of this binary expression.
Definition: MCExpr.h:551
const MCExpr * getSubExpr() const
Get the child of this unary expression.
Definition: MCExpr.h:397
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:44
Subtraction.
Definition: MCExpr.h:431
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:344
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:476