LLVM  10.0.0svn
MCExpr.h
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1 //===- MCExpr.h - Assembly Level Expressions --------------------*- 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 #ifndef LLVM_MC_MCEXPR_H
10 #define LLVM_MC_MCEXPR_H
11 
12 #include "llvm/ADT/DenseMap.h"
13 #include "llvm/Support/SMLoc.h"
14 #include <cstdint>
15 
16 namespace llvm {
17 
18 class MCAsmInfo;
19 class MCAsmLayout;
20 class MCAssembler;
21 class MCContext;
22 class MCFixup;
23 class MCFragment;
24 class MCSection;
25 class MCStreamer;
26 class MCSymbol;
27 class MCValue;
28 class raw_ostream;
29 class StringRef;
30 
32 
33 /// Base class for the full range of assembler expressions which are
34 /// needed for parsing.
35 class MCExpr {
36 public:
37  enum ExprKind {
38  Binary, ///< Binary expressions.
39  Constant, ///< Constant expressions.
40  SymbolRef, ///< References to labels and assigned expressions.
41  Unary, ///< Unary expressions.
42  Target ///< Target specific expression.
43  };
44 
45 private:
46  ExprKind Kind;
47  SMLoc Loc;
48 
49  bool evaluateAsAbsolute(int64_t &Res, const MCAssembler *Asm,
50  const MCAsmLayout *Layout,
51  const SectionAddrMap *Addrs, bool InSet) const;
52 
53 protected:
54  explicit MCExpr(ExprKind Kind, SMLoc Loc) : Kind(Kind), Loc(Loc) {}
55 
57  const MCAsmLayout *Layout,
58  const MCFixup *Fixup,
59  const SectionAddrMap *Addrs, bool InSet) const;
60 
61 public:
62  MCExpr(const MCExpr &) = delete;
63  MCExpr &operator=(const MCExpr &) = delete;
64 
65  /// \name Accessors
66  /// @{
67 
68  ExprKind getKind() const { return Kind; }
69  SMLoc getLoc() const { return Loc; }
70 
71  /// @}
72  /// \name Utility Methods
73  /// @{
74 
75  void print(raw_ostream &OS, const MCAsmInfo *MAI,
76  bool InParens = false) const;
77  void dump() const;
78 
79  /// @}
80  /// \name Expression Evaluation
81  /// @{
82 
83  /// Try to evaluate the expression to an absolute value.
84  ///
85  /// \param Res - The absolute value, if evaluation succeeds.
86  /// \param Layout - The assembler layout object to use for evaluating symbol
87  /// values. If not given, then only non-symbolic expressions will be
88  /// evaluated.
89  /// \return - True on success.
90  bool evaluateAsAbsolute(int64_t &Res, const MCAsmLayout &Layout,
91  const SectionAddrMap &Addrs) const;
92  bool evaluateAsAbsolute(int64_t &Res) const;
93  bool evaluateAsAbsolute(int64_t &Res, const MCAssembler &Asm) const;
94  bool evaluateAsAbsolute(int64_t &Res, const MCAssembler *Asm) const;
95  bool evaluateAsAbsolute(int64_t &Res, const MCAsmLayout &Layout) const;
96 
97  bool evaluateKnownAbsolute(int64_t &Res, const MCAsmLayout &Layout) const;
98 
99  /// Try to evaluate the expression to a relocatable value, i.e. an
100  /// expression of the fixed form (a - b + constant).
101  ///
102  /// \param Res - The relocatable value, if evaluation succeeds.
103  /// \param Layout - The assembler layout object to use for evaluating values.
104  /// \param Fixup - The Fixup object if available.
105  /// \return - True on success.
106  bool evaluateAsRelocatable(MCValue &Res, const MCAsmLayout *Layout,
107  const MCFixup *Fixup) const;
108 
109  /// Try to evaluate the expression to the form (a - b + constant) where
110  /// neither a nor b are variables.
111  ///
112  /// This is a more aggressive variant of evaluateAsRelocatable. The intended
113  /// use is for when relocations are not available, like the .size directive.
114  bool evaluateAsValue(MCValue &Res, const MCAsmLayout &Layout) const;
115 
116  /// Find the "associated section" for this expression, which is
117  /// currently defined as the absolute section for constants, or
118  /// otherwise the section associated with the first defined symbol in the
119  /// expression.
121 
122  /// @}
123 };
124 
125 inline raw_ostream &operator<<(raw_ostream &OS, const MCExpr &E) {
126  E.print(OS, nullptr);
127  return OS;
128 }
129 
130 //// Represent a constant integer expression.
131 class MCConstantExpr : public MCExpr {
132  int64_t Value;
133  bool PrintInHex = false;
134 
135  explicit MCConstantExpr(int64_t Value)
136  : MCExpr(MCExpr::Constant, SMLoc()), Value(Value) {}
137 
138  MCConstantExpr(int64_t Value, bool PrintInHex)
139  : MCExpr(MCExpr::Constant, SMLoc()), Value(Value),
140  PrintInHex(PrintInHex) {}
141 
142 public:
143  /// \name Construction
144  /// @{
145 
146  static const MCConstantExpr *create(int64_t Value, MCContext &Ctx,
147  bool PrintInHex = false);
148 
149  /// @}
150  /// \name Accessors
151  /// @{
152 
153  int64_t getValue() const { return Value; }
154 
155  bool useHexFormat() const { return PrintInHex; }
156 
157  /// @}
158 
159  static bool classof(const MCExpr *E) {
160  return E->getKind() == MCExpr::Constant;
161  }
162 };
163 
164 /// Represent a reference to a symbol from inside an expression.
165 ///
166 /// A symbol reference in an expression may be a use of a label, a use of an
167 /// assembler variable (defined constant), or constitute an implicit definition
168 /// of the symbol as external.
169 class MCSymbolRefExpr : public MCExpr {
170 public:
171  enum VariantKind : uint16_t {
174 
189  VK_TLSCALL, // symbol(tlscall)
190  VK_TLSDESC, // symbol(tlsdesc)
191  VK_TLVP, // Mach-O thread local variable relocations
199  VK_SIZE, // symbol@SIZE
200  VK_WEAKREF, // The link between the symbols in .weakref foo, bar
201 
203 
209  VK_ARM_SBREL, // symbol(sbrel)
210  VK_ARM_TLSLDO, // symbol(tlsldo)
212 
220 
221  VK_PPC_LO, // symbol@l
222  VK_PPC_HI, // symbol@h
223  VK_PPC_HA, // symbol@ha
224  VK_PPC_HIGH, // symbol@high
225  VK_PPC_HIGHA, // symbol@higha
226  VK_PPC_HIGHER, // symbol@higher
227  VK_PPC_HIGHERA, // symbol@highera
228  VK_PPC_HIGHEST, // symbol@highest
229  VK_PPC_HIGHESTA, // symbol@highesta
230  VK_PPC_GOT_LO, // symbol@got@l
231  VK_PPC_GOT_HI, // symbol@got@h
232  VK_PPC_GOT_HA, // symbol@got@ha
233  VK_PPC_TOCBASE, // symbol@tocbase
234  VK_PPC_TOC, // symbol@toc
235  VK_PPC_TOC_LO, // symbol@toc@l
236  VK_PPC_TOC_HI, // symbol@toc@h
237  VK_PPC_TOC_HA, // symbol@toc@ha
238  VK_PPC_DTPMOD, // symbol@dtpmod
239  VK_PPC_TPREL_LO, // symbol@tprel@l
240  VK_PPC_TPREL_HI, // symbol@tprel@h
241  VK_PPC_TPREL_HA, // symbol@tprel@ha
242  VK_PPC_TPREL_HIGH, // symbol@tprel@high
243  VK_PPC_TPREL_HIGHA, // symbol@tprel@higha
244  VK_PPC_TPREL_HIGHER, // symbol@tprel@higher
245  VK_PPC_TPREL_HIGHERA, // symbol@tprel@highera
246  VK_PPC_TPREL_HIGHEST, // symbol@tprel@highest
247  VK_PPC_TPREL_HIGHESTA, // symbol@tprel@highesta
248  VK_PPC_DTPREL_LO, // symbol@dtprel@l
249  VK_PPC_DTPREL_HI, // symbol@dtprel@h
250  VK_PPC_DTPREL_HA, // symbol@dtprel@ha
251  VK_PPC_DTPREL_HIGH, // symbol@dtprel@high
252  VK_PPC_DTPREL_HIGHA, // symbol@dtprel@higha
253  VK_PPC_DTPREL_HIGHER, // symbol@dtprel@higher
254  VK_PPC_DTPREL_HIGHERA, // symbol@dtprel@highera
255  VK_PPC_DTPREL_HIGHEST, // symbol@dtprel@highest
256  VK_PPC_DTPREL_HIGHESTA,// symbol@dtprel@highesta
257  VK_PPC_GOT_TPREL, // symbol@got@tprel
258  VK_PPC_GOT_TPREL_LO, // symbol@got@tprel@l
259  VK_PPC_GOT_TPREL_HI, // symbol@got@tprel@h
260  VK_PPC_GOT_TPREL_HA, // symbol@got@tprel@ha
261  VK_PPC_GOT_DTPREL, // symbol@got@dtprel
262  VK_PPC_GOT_DTPREL_LO, // symbol@got@dtprel@l
263  VK_PPC_GOT_DTPREL_HI, // symbol@got@dtprel@h
264  VK_PPC_GOT_DTPREL_HA, // symbol@got@dtprel@ha
265  VK_PPC_TLS, // symbol@tls
266  VK_PPC_GOT_TLSGD, // symbol@got@tlsgd
267  VK_PPC_GOT_TLSGD_LO, // symbol@got@tlsgd@l
268  VK_PPC_GOT_TLSGD_HI, // symbol@got@tlsgd@h
269  VK_PPC_GOT_TLSGD_HA, // symbol@got@tlsgd@ha
270  VK_PPC_TLSGD, // symbol@tlsgd
271  VK_PPC_GOT_TLSLD, // symbol@got@tlsld
272  VK_PPC_GOT_TLSLD_LO, // symbol@got@tlsld@l
273  VK_PPC_GOT_TLSLD_HI, // symbol@got@tlsld@h
274  VK_PPC_GOT_TLSLD_HA, // symbol@got@tlsld@ha
275  VK_PPC_TLSLD, // symbol@tlsld
276  VK_PPC_LOCAL, // symbol@local
277 
278  VK_COFF_IMGREL32, // symbol@imgrel (image-relative)
279 
290 
291  VK_WASM_TYPEINDEX, // Reference to a symbol's type (signature)
292  VK_WASM_MBREL, // Memory address relative to memory base
293  VK_WASM_TBREL, // Table index relative to table bare
294 
295  VK_AMDGPU_GOTPCREL32_LO, // symbol@gotpcrel32@lo
296  VK_AMDGPU_GOTPCREL32_HI, // symbol@gotpcrel32@hi
297  VK_AMDGPU_REL32_LO, // symbol@rel32@lo
298  VK_AMDGPU_REL32_HI, // symbol@rel32@hi
299  VK_AMDGPU_REL64, // symbol@rel64
300  VK_AMDGPU_ABS32_LO, // symbol@abs32@lo
301  VK_AMDGPU_ABS32_HI, // symbol@abs32@hi
302 
304  VK_DTPREL
305  };
306 
307 private:
308  /// The symbol reference modifier.
309  const VariantKind Kind;
310 
311  /// Specifies how the variant kind should be printed.
312  const unsigned UseParensForSymbolVariant : 1;
313 
314  // FIXME: Remove this bit.
315  const unsigned HasSubsectionsViaSymbols : 1;
316 
317  /// The symbol being referenced.
318  const MCSymbol *Symbol;
319 
320  explicit MCSymbolRefExpr(const MCSymbol *Symbol, VariantKind Kind,
321  const MCAsmInfo *MAI, SMLoc Loc = SMLoc());
322 
323 public:
324  /// \name Construction
325  /// @{
326 
327  static const MCSymbolRefExpr *create(const MCSymbol *Symbol, MCContext &Ctx) {
328  return MCSymbolRefExpr::create(Symbol, VK_None, Ctx);
329  }
330 
331  static const MCSymbolRefExpr *create(const MCSymbol *Symbol, VariantKind Kind,
332  MCContext &Ctx, SMLoc Loc = SMLoc());
333  static const MCSymbolRefExpr *create(StringRef Name, VariantKind Kind,
334  MCContext &Ctx);
335 
336  /// @}
337  /// \name Accessors
338  /// @{
339 
340  const MCSymbol &getSymbol() const { return *Symbol; }
341 
342  VariantKind getKind() const { return Kind; }
343 
344  void printVariantKind(raw_ostream &OS) const;
345 
346  bool hasSubsectionsViaSymbols() const { return HasSubsectionsViaSymbols; }
347 
348  /// @}
349  /// \name Static Utility Functions
350  /// @{
351 
352  static StringRef getVariantKindName(VariantKind Kind);
353 
354  static VariantKind getVariantKindForName(StringRef Name);
355 
356  /// @}
357 
358  static bool classof(const MCExpr *E) {
359  return E->getKind() == MCExpr::SymbolRef;
360  }
361 };
362 
363 /// Unary assembler expressions.
364 class MCUnaryExpr : public MCExpr {
365 public:
366  enum Opcode {
367  LNot, ///< Logical negation.
368  Minus, ///< Unary minus.
369  Not, ///< Bitwise negation.
370  Plus ///< Unary plus.
371  };
372 
373 private:
374  Opcode Op;
375  const MCExpr *Expr;
376 
377  MCUnaryExpr(Opcode Op, const MCExpr *Expr, SMLoc Loc)
378  : MCExpr(MCExpr::Unary, Loc), Op(Op), Expr(Expr) {}
379 
380 public:
381  /// \name Construction
382  /// @{
383 
384  static const MCUnaryExpr *create(Opcode Op, const MCExpr *Expr,
385  MCContext &Ctx, SMLoc Loc = SMLoc());
386 
387  static const MCUnaryExpr *createLNot(const MCExpr *Expr, MCContext &Ctx, SMLoc Loc = SMLoc()) {
388  return create(LNot, Expr, Ctx, Loc);
389  }
390 
391  static const MCUnaryExpr *createMinus(const MCExpr *Expr, MCContext &Ctx, SMLoc Loc = SMLoc()) {
392  return create(Minus, Expr, Ctx, Loc);
393  }
394 
395  static const MCUnaryExpr *createNot(const MCExpr *Expr, MCContext &Ctx, SMLoc Loc = SMLoc()) {
396  return create(Not, Expr, Ctx, Loc);
397  }
398 
399  static const MCUnaryExpr *createPlus(const MCExpr *Expr, MCContext &Ctx, SMLoc Loc = SMLoc()) {
400  return create(Plus, Expr, Ctx, Loc);
401  }
402 
403  /// @}
404  /// \name Accessors
405  /// @{
406 
407  /// Get the kind of this unary expression.
408  Opcode getOpcode() const { return Op; }
409 
410  /// Get the child of this unary expression.
411  const MCExpr *getSubExpr() const { return Expr; }
412 
413  /// @}
414 
415  static bool classof(const MCExpr *E) {
416  return E->getKind() == MCExpr::Unary;
417  }
418 };
419 
420 /// Binary assembler expressions.
421 class MCBinaryExpr : public MCExpr {
422 public:
423  enum Opcode {
424  Add, ///< Addition.
425  And, ///< Bitwise and.
426  Div, ///< Signed division.
427  EQ, ///< Equality comparison.
428  GT, ///< Signed greater than comparison (result is either 0 or some
429  ///< target-specific non-zero value)
430  GTE, ///< Signed greater than or equal comparison (result is either 0 or
431  ///< some target-specific non-zero value).
432  LAnd, ///< Logical and.
433  LOr, ///< Logical or.
434  LT, ///< Signed less than comparison (result is either 0 or
435  ///< some target-specific non-zero value).
436  LTE, ///< Signed less than or equal comparison (result is either 0 or
437  ///< some target-specific non-zero value).
438  Mod, ///< Signed remainder.
439  Mul, ///< Multiplication.
440  NE, ///< Inequality comparison.
441  Or, ///< Bitwise or.
442  Shl, ///< Shift left.
443  AShr, ///< Arithmetic shift right.
444  LShr, ///< Logical shift right.
445  Sub, ///< Subtraction.
446  Xor ///< Bitwise exclusive or.
447  };
448 
449 private:
450  Opcode Op;
451  const MCExpr *LHS, *RHS;
452 
453  MCBinaryExpr(Opcode Op, const MCExpr *LHS, const MCExpr *RHS,
454  SMLoc Loc = SMLoc())
455  : MCExpr(MCExpr::Binary, Loc), Op(Op), LHS(LHS), RHS(RHS) {}
456 
457 public:
458  /// \name Construction
459  /// @{
460 
461  static const MCBinaryExpr *create(Opcode Op, const MCExpr *LHS,
462  const MCExpr *RHS, MCContext &Ctx,
463  SMLoc Loc = SMLoc());
464 
465  static const MCBinaryExpr *createAdd(const MCExpr *LHS, const MCExpr *RHS,
466  MCContext &Ctx) {
467  return create(Add, LHS, RHS, Ctx);
468  }
469 
470  static const MCBinaryExpr *createAnd(const MCExpr *LHS, const MCExpr *RHS,
471  MCContext &Ctx) {
472  return create(And, LHS, RHS, Ctx);
473  }
474 
475  static const MCBinaryExpr *createDiv(const MCExpr *LHS, const MCExpr *RHS,
476  MCContext &Ctx) {
477  return create(Div, LHS, RHS, Ctx);
478  }
479 
480  static const MCBinaryExpr *createEQ(const MCExpr *LHS, const MCExpr *RHS,
481  MCContext &Ctx) {
482  return create(EQ, LHS, RHS, Ctx);
483  }
484 
485  static const MCBinaryExpr *createGT(const MCExpr *LHS, const MCExpr *RHS,
486  MCContext &Ctx) {
487  return create(GT, LHS, RHS, Ctx);
488  }
489 
490  static const MCBinaryExpr *createGTE(const MCExpr *LHS, const MCExpr *RHS,
491  MCContext &Ctx) {
492  return create(GTE, LHS, RHS, Ctx);
493  }
494 
495  static const MCBinaryExpr *createLAnd(const MCExpr *LHS, const MCExpr *RHS,
496  MCContext &Ctx) {
497  return create(LAnd, LHS, RHS, Ctx);
498  }
499 
500  static const MCBinaryExpr *createLOr(const MCExpr *LHS, const MCExpr *RHS,
501  MCContext &Ctx) {
502  return create(LOr, LHS, RHS, Ctx);
503  }
504 
505  static const MCBinaryExpr *createLT(const MCExpr *LHS, const MCExpr *RHS,
506  MCContext &Ctx) {
507  return create(LT, LHS, RHS, Ctx);
508  }
509 
510  static const MCBinaryExpr *createLTE(const MCExpr *LHS, const MCExpr *RHS,
511  MCContext &Ctx) {
512  return create(LTE, LHS, RHS, Ctx);
513  }
514 
515  static const MCBinaryExpr *createMod(const MCExpr *LHS, const MCExpr *RHS,
516  MCContext &Ctx) {
517  return create(Mod, LHS, RHS, Ctx);
518  }
519 
520  static const MCBinaryExpr *createMul(const MCExpr *LHS, const MCExpr *RHS,
521  MCContext &Ctx) {
522  return create(Mul, LHS, RHS, Ctx);
523  }
524 
525  static const MCBinaryExpr *createNE(const MCExpr *LHS, const MCExpr *RHS,
526  MCContext &Ctx) {
527  return create(NE, LHS, RHS, Ctx);
528  }
529 
530  static const MCBinaryExpr *createOr(const MCExpr *LHS, const MCExpr *RHS,
531  MCContext &Ctx) {
532  return create(Or, LHS, RHS, Ctx);
533  }
534 
535  static const MCBinaryExpr *createShl(const MCExpr *LHS, const MCExpr *RHS,
536  MCContext &Ctx) {
537  return create(Shl, LHS, RHS, Ctx);
538  }
539 
540  static const MCBinaryExpr *createAShr(const MCExpr *LHS, const MCExpr *RHS,
541  MCContext &Ctx) {
542  return create(AShr, LHS, RHS, Ctx);
543  }
544 
545  static const MCBinaryExpr *createLShr(const MCExpr *LHS, const MCExpr *RHS,
546  MCContext &Ctx) {
547  return create(LShr, LHS, RHS, Ctx);
548  }
549 
550  static const MCBinaryExpr *createSub(const MCExpr *LHS, const MCExpr *RHS,
551  MCContext &Ctx) {
552  return create(Sub, LHS, RHS, Ctx);
553  }
554 
555  static const MCBinaryExpr *createXor(const MCExpr *LHS, const MCExpr *RHS,
556  MCContext &Ctx) {
557  return create(Xor, LHS, RHS, Ctx);
558  }
559 
560  /// @}
561  /// \name Accessors
562  /// @{
563 
564  /// Get the kind of this binary expression.
565  Opcode getOpcode() const { return Op; }
566 
567  /// Get the left-hand side expression of the binary operator.
568  const MCExpr *getLHS() const { return LHS; }
569 
570  /// Get the right-hand side expression of the binary operator.
571  const MCExpr *getRHS() const { return RHS; }
572 
573  /// @}
574 
575  static bool classof(const MCExpr *E) {
576  return E->getKind() == MCExpr::Binary;
577  }
578 };
579 
580 /// This is an extension point for target-specific MCExpr subclasses to
581 /// implement.
582 ///
583 /// NOTE: All subclasses are required to have trivial destructors because
584 /// MCExprs are bump pointer allocated and not destructed.
585 class MCTargetExpr : public MCExpr {
586  virtual void anchor();
587 
588 protected:
590  virtual ~MCTargetExpr() = default;
591 
592 public:
593  virtual void printImpl(raw_ostream &OS, const MCAsmInfo *MAI) const = 0;
594  virtual bool evaluateAsRelocatableImpl(MCValue &Res,
595  const MCAsmLayout *Layout,
596  const MCFixup *Fixup) const = 0;
597  // allow Target Expressions to be checked for equality
598  virtual bool isEqualTo(const MCExpr *x) const { return false; }
599  // This should be set when assigned expressions are not valid ".set"
600  // expressions, e.g. registers, and must be inlined.
601  virtual bool inlineAssignedExpr() const { return false; }
602  virtual void visitUsedExpr(MCStreamer& Streamer) const = 0;
603  virtual MCFragment *findAssociatedFragment() const = 0;
604 
605  virtual void fixELFSymbolsInTLSFixups(MCAssembler &) const = 0;
606 
607  static bool classof(const MCExpr *E) {
608  return E->getKind() == MCExpr::Target;
609  }
610 };
611 
612 } // end namespace llvm
613 
614 #endif // LLVM_MC_MCEXPR_H
static const MCUnaryExpr * createLNot(const MCExpr *Expr, MCContext &Ctx, SMLoc Loc=SMLoc())
Definition: MCExpr.h:387
static const MCBinaryExpr * createGT(const MCExpr *LHS, const MCExpr *RHS, MCContext &Ctx)
Definition: MCExpr.h:485
static const MCBinaryExpr * createEQ(const MCExpr *LHS, const MCExpr *RHS, MCContext &Ctx)
Definition: MCExpr.h:480
Bitwise negation.
Definition: MCExpr.h:369
static const MCSymbolRefExpr * create(const MCSymbol *Symbol, MCContext &Ctx)
Definition: MCExpr.h:327
This class represents lattice values for constants.
Definition: AllocatorList.h:23
This represents an "assembler immediate".
Definition: MCValue.h:39
MCSymbol - Instances of this class represent a symbol name in the MC file, and MCSymbols are created ...
Definition: MCSymbol.h:41
VariantKind getKind() const
Definition: MCExpr.h:342
Bitwise and.
Definition: MCExpr.h:425
amdgpu Simplify well known AMD library false FunctionCallee Value const Twine & Name
Multiplication.
Definition: MCExpr.h:439
Opcode getOpcode() const
Get the kind of this unary expression.
Definition: MCExpr.h:408
const MCExpr * getLHS() const
Get the left-hand side expression of the binary operator.
Definition: MCExpr.h:568
static const MCBinaryExpr * createAnd(const MCExpr *LHS, const MCExpr *RHS, MCContext &Ctx)
Definition: MCExpr.h:470
static const MCBinaryExpr * createMul(const MCExpr *LHS, const MCExpr *RHS, MCContext &Ctx)
Definition: MCExpr.h:520
Equality comparison.
Definition: MCExpr.h:427
Bitwise or.
Definition: MCExpr.h:441
SMLoc getLoc() const
Definition: MCExpr.h:69
Encode information on a single operation to perform on a byte sequence (e.g., an encoded instruction)...
Definition: MCFixup.h:77
static const MCBinaryExpr * createXor(const MCExpr *LHS, const MCExpr *RHS, MCContext &Ctx)
Definition: MCExpr.h:555
Encapsulates the layout of an assembly file at a particular point in time.
Definition: MCAsmLayout.h:28
static const MCBinaryExpr * createDiv(const MCExpr *LHS, const MCExpr *RHS, MCContext &Ctx)
Definition: MCExpr.h:475
Base class for the full range of assembler expressions which are needed for parsing.
Definition: MCExpr.h:35
This is an extension point for target-specific MCExpr subclasses to implement.
Definition: MCExpr.h:585
Represent a reference to a symbol from inside an expression.
Definition: MCExpr.h:169
static const MCBinaryExpr * createAShr(const MCExpr *LHS, const MCExpr *RHS, MCContext &Ctx)
Definition: MCExpr.h:540
Context object for machine code objects.
Definition: MCContext.h:65
static const MCBinaryExpr * createShl(const MCExpr *LHS, const MCExpr *RHS, MCContext &Ctx)
Definition: MCExpr.h:535
virtual bool inlineAssignedExpr() const
Definition: MCExpr.h:601
static const MCBinaryExpr * createLOr(const MCExpr *LHS, const MCExpr *RHS, MCContext &Ctx)
Definition: MCExpr.h:500
Arithmetic shift right.
Definition: MCExpr.h:443
static const MCBinaryExpr * createSub(const MCExpr *LHS, const MCExpr *RHS, MCContext &Ctx)
Definition: MCExpr.h:550
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:665
const MCExpr * getRHS() const
Get the right-hand side expression of the binary operator.
Definition: MCExpr.h:571
Logical or.
Definition: MCExpr.h:433
Signed remainder.
Definition: MCExpr.h:438
static bool classof(const MCExpr *E)
Definition: MCExpr.h:159
Unary assembler expressions.
Definition: MCExpr.h:364
void dump() const
Definition: MCExpr.cpp:150
Signed division.
Definition: MCExpr.h:426
#define EQ(a, b)
Definition: regexec.c:112
static const MCBinaryExpr * createAdd(const MCExpr *LHS, const MCExpr *RHS, MCContext &Ctx)
Definition: MCExpr.h:465
bool useHexFormat() const
Definition: MCExpr.h:155
Unary expressions.
Definition: MCExpr.h:41
Shift left.
Definition: MCExpr.h:442
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:153
static const MCUnaryExpr * createPlus(const MCExpr *Expr, MCContext &Ctx, SMLoc Loc=SMLoc())
Definition: MCExpr.h:399
Streaming machine code generation interface.
Definition: MCStreamer.h:190
bool evaluateKnownAbsolute(int64_t &Res, const MCAsmLayout &Layout) const
Definition: MCExpr.cpp:480
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:530
Logical negation.
Definition: MCExpr.h:367
Logical and.
Definition: MCExpr.h:432
Binary assembler expressions.
Definition: MCExpr.h:421
bool hasSubsectionsViaSymbols() const
Definition: MCExpr.h:346
static const MCBinaryExpr * createLShr(const MCExpr *LHS, const MCExpr *RHS, MCContext &Ctx)
Definition: MCExpr.h:545
static const MCUnaryExpr * createMinus(const MCExpr *Expr, MCContext &Ctx, SMLoc Loc=SMLoc())
Definition: MCExpr.h:391
PowerPC TLS Dynamic Call Fixup
static bool classof(const MCExpr *E)
Definition: MCExpr.h:575
const MCSymbol & getSymbol() const
Definition: MCExpr.h:340
ExprKind getKind() const
Definition: MCExpr.h:68
static const MCBinaryExpr * createLT(const MCExpr *LHS, const MCExpr *RHS, MCContext &Ctx)
Definition: MCExpr.h:505
static bool classof(const MCExpr *E)
Definition: MCExpr.h:607
bool evaluateAsRelocatableImpl(MCValue &Res, const MCAssembler *Asm, const MCAsmLayout *Layout, const MCFixup *Fixup, const SectionAddrMap *Addrs, bool InSet) const
Definition: MCExpr.cpp:692
Inequality comparison.
Definition: MCExpr.h:440
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:885
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:495
Logical shift right.
Definition: MCExpr.h:444
static const MCBinaryExpr * createNE(const MCExpr *LHS, const MCExpr *RHS, MCContext &Ctx)
Definition: MCExpr.h:525
static const MCBinaryExpr * createLTE(const MCExpr *LHS, const MCExpr *RHS, MCContext &Ctx)
Definition: MCExpr.h:510
static const MCUnaryExpr * createNot(const MCExpr *Expr, MCContext &Ctx, SMLoc Loc=SMLoc())
Definition: MCExpr.h:395
static const MCBinaryExpr * createMod(const MCExpr *LHS, const MCExpr *RHS, MCContext &Ctx)
Definition: MCExpr.h:515
References to labels and assigned expressions.
Definition: MCExpr.h:40
Unary minus.
Definition: MCExpr.h:368
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:673
raw_ostream & operator<<(raw_ostream &OS, const APInt &I)
Definition: APInt.h:2047
virtual bool isEqualTo(const MCExpr *x) const
Definition: MCExpr.h:598
static bool classof(const MCExpr *E)
Definition: MCExpr.h:415
Opcode getOpcode() const
Get the kind of this binary expression.
Definition: MCExpr.h:565
const MCExpr * getSubExpr() const
Get the child of this unary expression.
Definition: MCExpr.h:411
Constant expressions.
Definition: MCExpr.h:39
Binary expressions.
Definition: MCExpr.h:38
This class implements an extremely fast bulk output stream that can only output to a stream...
Definition: raw_ostream.h:45
Subtraction.
Definition: MCExpr.h:445
StringRef - Represent a constant reference to a string, i.e.
Definition: StringRef.h:48
Target specific expression.
Definition: MCExpr.h:42
static bool classof(const MCExpr *E)
Definition: MCExpr.h:358
Represents a location in source code.
Definition: SMLoc.h:23
MCExpr(ExprKind Kind, SMLoc Loc)
Definition: MCExpr.h:54
static const MCBinaryExpr * createGTE(const MCExpr *LHS, const MCExpr *RHS, MCContext &Ctx)
Definition: MCExpr.h:490