LLVM 17.0.0git
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
16namespace llvm {
17
18class MCAsmInfo;
19class MCAsmLayout;
20class MCAssembler;
21class MCContext;
22class MCFixup;
23class MCFragment;
24class MCSection;
25class MCStreamer;
26class MCSymbol;
27class MCValue;
28class raw_ostream;
29class StringRef;
30
32
33/// Base class for the full range of assembler expressions which are
34/// needed for parsing.
35class MCExpr {
36public:
37 enum ExprKind : uint8_t {
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
45private:
46 static const unsigned NumSubclassDataBits = 24;
47 static_assert(
48 NumSubclassDataBits == CHAR_BIT * (sizeof(unsigned) - sizeof(ExprKind)),
49 "ExprKind and SubclassData together should take up one word");
50
51 ExprKind Kind;
52 /// Field reserved for use by MCExpr subclasses.
53 unsigned SubclassData : NumSubclassDataBits;
54 SMLoc Loc;
55
56 bool evaluateAsAbsolute(int64_t &Res, const MCAssembler *Asm,
57 const MCAsmLayout *Layout,
58 const SectionAddrMap *Addrs, bool InSet) const;
59
60protected:
61 explicit MCExpr(ExprKind Kind, SMLoc Loc, unsigned SubclassData = 0)
62 : Kind(Kind), SubclassData(SubclassData), Loc(Loc) {
63 assert(SubclassData < (1 << NumSubclassDataBits) &&
64 "Subclass data too large");
65 }
66
67 bool evaluateAsRelocatableImpl(MCValue &Res, const MCAssembler *Asm,
68 const MCAsmLayout *Layout,
69 const MCFixup *Fixup,
70 const SectionAddrMap *Addrs, bool InSet) const;
71
72 unsigned getSubclassData() const { return SubclassData; }
73
74public:
75 MCExpr(const MCExpr &) = delete;
76 MCExpr &operator=(const MCExpr &) = delete;
77
78 /// \name Accessors
79 /// @{
80
81 ExprKind getKind() const { return Kind; }
82 SMLoc getLoc() const { return Loc; }
83
84 /// @}
85 /// \name Utility Methods
86 /// @{
87
88 void print(raw_ostream &OS, const MCAsmInfo *MAI,
89 bool InParens = false) const;
90 void dump() const;
91
92 /// @}
93 /// \name Expression Evaluation
94 /// @{
95
96 /// Try to evaluate the expression to an absolute value.
97 ///
98 /// \param Res - The absolute value, if evaluation succeeds.
99 /// \param Layout - The assembler layout object to use for evaluating symbol
100 /// values. If not given, then only non-symbolic expressions will be
101 /// evaluated.
102 /// \return - True on success.
103 bool evaluateAsAbsolute(int64_t &Res, const MCAsmLayout &Layout,
104 const SectionAddrMap &Addrs) const;
105 bool evaluateAsAbsolute(int64_t &Res) const;
106 bool evaluateAsAbsolute(int64_t &Res, const MCAssembler &Asm) const;
107 bool evaluateAsAbsolute(int64_t &Res, const MCAssembler *Asm) const;
108 bool evaluateAsAbsolute(int64_t &Res, const MCAsmLayout &Layout) const;
109
110 bool evaluateKnownAbsolute(int64_t &Res, const MCAsmLayout &Layout) const;
111
112 /// Try to evaluate the expression to a relocatable value, i.e. an
113 /// expression of the fixed form (a - b + constant).
114 ///
115 /// \param Res - The relocatable value, if evaluation succeeds.
116 /// \param Layout - The assembler layout object to use for evaluating values.
117 /// \param Fixup - The Fixup object if available.
118 /// \return - True on success.
119 bool evaluateAsRelocatable(MCValue &Res, const MCAsmLayout *Layout,
120 const MCFixup *Fixup) const;
121
122 /// Try to evaluate the expression to the form (a - b + constant) where
123 /// neither a nor b are variables.
124 ///
125 /// This is a more aggressive variant of evaluateAsRelocatable. The intended
126 /// use is for when relocations are not available, like the .size directive.
127 bool evaluateAsValue(MCValue &Res, const MCAsmLayout &Layout) const;
128
129 /// Find the "associated section" for this expression, which is
130 /// currently defined as the absolute section for constants, or
131 /// otherwise the section associated with the first defined symbol in the
132 /// expression.
134
135 /// @}
136};
137
139 E.print(OS, nullptr);
140 return OS;
141}
142
143//// Represent a constant integer expression.
144class MCConstantExpr : public MCExpr {
145 int64_t Value;
146
147 // Subclass data stores SizeInBytes in bits 0..7 and PrintInHex in bit 8.
148 static const unsigned SizeInBytesBits = 8;
149 static const unsigned SizeInBytesMask = (1 << SizeInBytesBits) - 1;
150 static const unsigned PrintInHexBit = 1 << SizeInBytesBits;
151
152 static unsigned encodeSubclassData(bool PrintInHex, unsigned SizeInBytes) {
153 assert(SizeInBytes <= sizeof(int64_t) && "Excessive size");
154 return SizeInBytes | (PrintInHex ? PrintInHexBit : 0);
155 }
156
157 MCConstantExpr(int64_t Value, bool PrintInHex, unsigned SizeInBytes)
159 encodeSubclassData(PrintInHex, SizeInBytes)), Value(Value) {}
160
161public:
162 /// \name Construction
163 /// @{
164
165 static const MCConstantExpr *create(int64_t Value, MCContext &Ctx,
166 bool PrintInHex = false,
167 unsigned SizeInBytes = 0);
168
169 /// @}
170 /// \name Accessors
171 /// @{
172
173 int64_t getValue() const { return Value; }
174 unsigned getSizeInBytes() const {
175 return getSubclassData() & SizeInBytesMask;
176 }
177
178 bool useHexFormat() const { return (getSubclassData() & PrintInHexBit) != 0; }
179
180 /// @}
181
182 static bool classof(const MCExpr *E) {
183 return E->getKind() == MCExpr::Constant;
184 }
185};
186
187/// Represent a reference to a symbol from inside an expression.
188///
189/// A symbol reference in an expression may be a use of a label, a use of an
190/// assembler variable (defined constant), or constitute an implicit definition
191/// of the symbol as external.
192class MCSymbolRefExpr : public MCExpr {
193public:
197
214 VK_TLSCALL, // symbol(tlscall)
215 VK_TLSDESC, // symbol(tlsdesc)
216 VK_TLVP, // Mach-O thread local variable relocations
224 VK_SIZE, // symbol@SIZE
225 VK_WEAKREF, // The link between the symbols in .weakref foo, bar
226
229
235 VK_ARM_SBREL, // symbol(sbrel)
236 VK_ARM_TLSLDO, // symbol(tlsldo)
238
247
248 VK_PPC_LO, // symbol@l
249 VK_PPC_HI, // symbol@h
250 VK_PPC_HA, // symbol@ha
251 VK_PPC_HIGH, // symbol@high
252 VK_PPC_HIGHA, // symbol@higha
253 VK_PPC_HIGHER, // symbol@higher
254 VK_PPC_HIGHERA, // symbol@highera
255 VK_PPC_HIGHEST, // symbol@highest
256 VK_PPC_HIGHESTA, // symbol@highesta
257 VK_PPC_GOT_LO, // symbol@got@l
258 VK_PPC_GOT_HI, // symbol@got@h
259 VK_PPC_GOT_HA, // symbol@got@ha
260 VK_PPC_TOCBASE, // symbol@tocbase
261 VK_PPC_TOC, // symbol@toc
262 VK_PPC_TOC_LO, // symbol@toc@l
263 VK_PPC_TOC_HI, // symbol@toc@h
264 VK_PPC_TOC_HA, // symbol@toc@ha
265 VK_PPC_U, // symbol@u
266 VK_PPC_L, // symbol@l
267 VK_PPC_DTPMOD, // symbol@dtpmod
268 VK_PPC_TPREL_LO, // symbol@tprel@l
269 VK_PPC_TPREL_HI, // symbol@tprel@h
270 VK_PPC_TPREL_HA, // symbol@tprel@ha
271 VK_PPC_TPREL_HIGH, // symbol@tprel@high
272 VK_PPC_TPREL_HIGHA, // symbol@tprel@higha
273 VK_PPC_TPREL_HIGHER, // symbol@tprel@higher
274 VK_PPC_TPREL_HIGHERA, // symbol@tprel@highera
275 VK_PPC_TPREL_HIGHEST, // symbol@tprel@highest
276 VK_PPC_TPREL_HIGHESTA, // symbol@tprel@highesta
277 VK_PPC_DTPREL_LO, // symbol@dtprel@l
278 VK_PPC_DTPREL_HI, // symbol@dtprel@h
279 VK_PPC_DTPREL_HA, // symbol@dtprel@ha
280 VK_PPC_DTPREL_HIGH, // symbol@dtprel@high
281 VK_PPC_DTPREL_HIGHA, // symbol@dtprel@higha
282 VK_PPC_DTPREL_HIGHER, // symbol@dtprel@higher
283 VK_PPC_DTPREL_HIGHERA, // symbol@dtprel@highera
284 VK_PPC_DTPREL_HIGHEST, // symbol@dtprel@highest
285 VK_PPC_DTPREL_HIGHESTA, // symbol@dtprel@highesta
286 VK_PPC_GOT_TPREL, // symbol@got@tprel
287 VK_PPC_GOT_TPREL_LO, // symbol@got@tprel@l
288 VK_PPC_GOT_TPREL_HI, // symbol@got@tprel@h
289 VK_PPC_GOT_TPREL_HA, // symbol@got@tprel@ha
290 VK_PPC_GOT_DTPREL, // symbol@got@dtprel
291 VK_PPC_GOT_DTPREL_LO, // symbol@got@dtprel@l
292 VK_PPC_GOT_DTPREL_HI, // symbol@got@dtprel@h
293 VK_PPC_GOT_DTPREL_HA, // symbol@got@dtprel@ha
294 VK_PPC_TLS, // symbol@tls
295 VK_PPC_GOT_TLSGD, // symbol@got@tlsgd
296 VK_PPC_GOT_TLSGD_LO, // symbol@got@tlsgd@l
297 VK_PPC_GOT_TLSGD_HI, // symbol@got@tlsgd@h
298 VK_PPC_GOT_TLSGD_HA, // symbol@got@tlsgd@ha
299 VK_PPC_TLSGD, // symbol@tlsgd
300 VK_PPC_AIX_TLSGD, // symbol@gd
301 VK_PPC_AIX_TLSGDM, // symbol@m
302 VK_PPC_GOT_TLSLD, // symbol@got@tlsld
303 VK_PPC_GOT_TLSLD_LO, // symbol@got@tlsld@l
304 VK_PPC_GOT_TLSLD_HI, // symbol@got@tlsld@h
305 VK_PPC_GOT_TLSLD_HA, // symbol@got@tlsld@ha
306 VK_PPC_GOT_PCREL, // symbol@got@pcrel
307 VK_PPC_GOT_TLSGD_PCREL, // symbol@got@tlsgd@pcrel
308 VK_PPC_GOT_TLSLD_PCREL, // symbol@got@tlsld@pcrel
309 VK_PPC_GOT_TPREL_PCREL, // symbol@got@tprel@pcrel
310 VK_PPC_TLS_PCREL, // symbol@tls@pcrel
311 VK_PPC_TLSLD, // symbol@tlsld
312 VK_PPC_LOCAL, // symbol@local
313 VK_PPC_NOTOC, // symbol@notoc
314 VK_PPC_PCREL_OPT, // .reloc expr, R_PPC64_PCREL_OPT, expr
315
316 VK_COFF_IMGREL32, // symbol@imgrel (image-relative)
317
327
328 VK_WASM_TYPEINDEX, // Reference to a symbol's type (signature)
329 VK_WASM_TLSREL, // Memory address relative to __tls_base
330 VK_WASM_MBREL, // Memory address relative to __memory_base
331 VK_WASM_TBREL, // Table index relative to __table_base
332 VK_WASM_GOT_TLS, // Wasm global index of TLS symbol.
333
334 VK_AMDGPU_GOTPCREL32_LO, // symbol@gotpcrel32@lo
335 VK_AMDGPU_GOTPCREL32_HI, // symbol@gotpcrel32@hi
336 VK_AMDGPU_REL32_LO, // symbol@rel32@lo
337 VK_AMDGPU_REL32_HI, // symbol@rel32@hi
338 VK_AMDGPU_REL64, // symbol@rel64
339 VK_AMDGPU_ABS32_LO, // symbol@abs32@lo
340 VK_AMDGPU_ABS32_HI, // symbol@abs32@hi
341
342 VK_VE_HI32, // symbol@hi
343 VK_VE_LO32, // symbol@lo
344 VK_VE_PC_HI32, // symbol@pc_hi
345 VK_VE_PC_LO32, // symbol@pc_lo
346 VK_VE_GOT_HI32, // symbol@got_hi
347 VK_VE_GOT_LO32, // symbol@got_lo
348 VK_VE_GOTOFF_HI32, // symbol@gotoff_hi
349 VK_VE_GOTOFF_LO32, // symbol@gotoff_lo
350 VK_VE_PLT_HI32, // symbol@plt_hi
351 VK_VE_PLT_LO32, // symbol@plt_lo
352 VK_VE_TLS_GD_HI32, // symbol@tls_gd_hi
353 VK_VE_TLS_GD_LO32, // symbol@tls_gd_lo
354 VK_VE_TPOFF_HI32, // symbol@tpoff_hi
355 VK_VE_TPOFF_LO32, // symbol@tpoff_lo
356
359 };
360
361private:
362 /// The symbol being referenced.
363 const MCSymbol *Symbol;
364
365 // Subclass data stores VariantKind in bits 0..15 and HasSubsectionsViaSymbols
366 // in bit 16.
367 static const unsigned VariantKindBits = 16;
368 static const unsigned VariantKindMask = (1 << VariantKindBits) - 1;
369
370 // FIXME: Remove this bit.
371 static const unsigned HasSubsectionsViaSymbolsBit = 1 << VariantKindBits;
372
373 static unsigned encodeSubclassData(VariantKind Kind,
374 bool HasSubsectionsViaSymbols) {
375 return (unsigned)Kind |
376 (HasSubsectionsViaSymbols ? HasSubsectionsViaSymbolsBit : 0);
377 }
378
379 explicit MCSymbolRefExpr(const MCSymbol *Symbol, VariantKind Kind,
380 const MCAsmInfo *MAI, SMLoc Loc = SMLoc());
381
382public:
383 /// \name Construction
384 /// @{
385
386 static const MCSymbolRefExpr *create(const MCSymbol *Symbol, MCContext &Ctx) {
387 return MCSymbolRefExpr::create(Symbol, VK_None, Ctx);
388 }
389
390 static const MCSymbolRefExpr *create(const MCSymbol *Symbol, VariantKind Kind,
391 MCContext &Ctx, SMLoc Loc = SMLoc());
392 static const MCSymbolRefExpr *create(StringRef Name, VariantKind Kind,
393 MCContext &Ctx);
394
395 /// @}
396 /// \name Accessors
397 /// @{
398
399 const MCSymbol &getSymbol() const { return *Symbol; }
400
402 return (VariantKind)(getSubclassData() & VariantKindMask);
403 }
404
406 return (getSubclassData() & HasSubsectionsViaSymbolsBit) != 0;
407 }
408
409 /// @}
410 /// \name Static Utility Functions
411 /// @{
412
414
416
417 /// @}
418
419 static bool classof(const MCExpr *E) {
420 return E->getKind() == MCExpr::SymbolRef;
421 }
422};
423
424/// Unary assembler expressions.
425class MCUnaryExpr : public MCExpr {
426public:
427 enum Opcode {
428 LNot, ///< Logical negation.
429 Minus, ///< Unary minus.
430 Not, ///< Bitwise negation.
431 Plus ///< Unary plus.
432 };
433
434private:
435 const MCExpr *Expr;
436
437 MCUnaryExpr(Opcode Op, const MCExpr *Expr, SMLoc Loc)
438 : MCExpr(MCExpr::Unary, Loc, Op), Expr(Expr) {}
439
440public:
441 /// \name Construction
442 /// @{
443
444 static const MCUnaryExpr *create(Opcode Op, const MCExpr *Expr,
445 MCContext &Ctx, SMLoc Loc = SMLoc());
446
447 static const MCUnaryExpr *createLNot(const MCExpr *Expr, MCContext &Ctx, SMLoc Loc = SMLoc()) {
448 return create(LNot, Expr, Ctx, Loc);
449 }
450
451 static const MCUnaryExpr *createMinus(const MCExpr *Expr, MCContext &Ctx, SMLoc Loc = SMLoc()) {
452 return create(Minus, Expr, Ctx, Loc);
453 }
454
455 static const MCUnaryExpr *createNot(const MCExpr *Expr, MCContext &Ctx, SMLoc Loc = SMLoc()) {
456 return create(Not, Expr, Ctx, Loc);
457 }
458
459 static const MCUnaryExpr *createPlus(const MCExpr *Expr, MCContext &Ctx, SMLoc Loc = SMLoc()) {
460 return create(Plus, Expr, Ctx, Loc);
461 }
462
463 /// @}
464 /// \name Accessors
465 /// @{
466
467 /// Get the kind of this unary expression.
468 Opcode getOpcode() const { return (Opcode)getSubclassData(); }
469
470 /// Get the child of this unary expression.
471 const MCExpr *getSubExpr() const { return Expr; }
472
473 /// @}
474
475 static bool classof(const MCExpr *E) {
476 return E->getKind() == MCExpr::Unary;
477 }
478};
479
480/// Binary assembler expressions.
481class MCBinaryExpr : public MCExpr {
482public:
483 enum Opcode {
484 Add, ///< Addition.
485 And, ///< Bitwise and.
486 Div, ///< Signed division.
487 EQ, ///< Equality comparison.
488 GT, ///< Signed greater than comparison (result is either 0 or some
489 ///< target-specific non-zero value)
490 GTE, ///< Signed greater than or equal comparison (result is either 0 or
491 ///< some target-specific non-zero value).
492 LAnd, ///< Logical and.
493 LOr, ///< Logical or.
494 LT, ///< Signed less than comparison (result is either 0 or
495 ///< some target-specific non-zero value).
496 LTE, ///< Signed less than or equal comparison (result is either 0 or
497 ///< some target-specific non-zero value).
498 Mod, ///< Signed remainder.
499 Mul, ///< Multiplication.
500 NE, ///< Inequality comparison.
501 Or, ///< Bitwise or.
502 OrNot, ///< Bitwise or not.
503 Shl, ///< Shift left.
504 AShr, ///< Arithmetic shift right.
505 LShr, ///< Logical shift right.
506 Sub, ///< Subtraction.
507 Xor ///< Bitwise exclusive or.
508 };
509
510private:
511 const MCExpr *LHS, *RHS;
512
513 MCBinaryExpr(Opcode Op, const MCExpr *LHS, const MCExpr *RHS,
514 SMLoc Loc = SMLoc())
515 : MCExpr(MCExpr::Binary, Loc, Op), LHS(LHS), RHS(RHS) {}
516
517public:
518 /// \name Construction
519 /// @{
520
521 static const MCBinaryExpr *create(Opcode Op, const MCExpr *LHS,
522 const MCExpr *RHS, MCContext &Ctx,
523 SMLoc Loc = SMLoc());
524
525 static const MCBinaryExpr *createAdd(const MCExpr *LHS, const MCExpr *RHS,
526 MCContext &Ctx) {
527 return create(Add, LHS, RHS, Ctx);
528 }
529
530 static const MCBinaryExpr *createAnd(const MCExpr *LHS, const MCExpr *RHS,
531 MCContext &Ctx) {
532 return create(And, LHS, RHS, Ctx);
533 }
534
535 static const MCBinaryExpr *createDiv(const MCExpr *LHS, const MCExpr *RHS,
536 MCContext &Ctx) {
537 return create(Div, LHS, RHS, Ctx);
538 }
539
540 static const MCBinaryExpr *createEQ(const MCExpr *LHS, const MCExpr *RHS,
541 MCContext &Ctx) {
542 return create(EQ, LHS, RHS, Ctx);
543 }
544
545 static const MCBinaryExpr *createGT(const MCExpr *LHS, const MCExpr *RHS,
546 MCContext &Ctx) {
547 return create(GT, LHS, RHS, Ctx);
548 }
549
550 static const MCBinaryExpr *createGTE(const MCExpr *LHS, const MCExpr *RHS,
551 MCContext &Ctx) {
552 return create(GTE, LHS, RHS, Ctx);
553 }
554
555 static const MCBinaryExpr *createLAnd(const MCExpr *LHS, const MCExpr *RHS,
556 MCContext &Ctx) {
557 return create(LAnd, LHS, RHS, Ctx);
558 }
559
560 static const MCBinaryExpr *createLOr(const MCExpr *LHS, const MCExpr *RHS,
561 MCContext &Ctx) {
562 return create(LOr, LHS, RHS, Ctx);
563 }
564
565 static const MCBinaryExpr *createLT(const MCExpr *LHS, const MCExpr *RHS,
566 MCContext &Ctx) {
567 return create(LT, LHS, RHS, Ctx);
568 }
569
570 static const MCBinaryExpr *createLTE(const MCExpr *LHS, const MCExpr *RHS,
571 MCContext &Ctx) {
572 return create(LTE, LHS, RHS, Ctx);
573 }
574
575 static const MCBinaryExpr *createMod(const MCExpr *LHS, const MCExpr *RHS,
576 MCContext &Ctx) {
577 return create(Mod, LHS, RHS, Ctx);
578 }
579
580 static const MCBinaryExpr *createMul(const MCExpr *LHS, const MCExpr *RHS,
581 MCContext &Ctx) {
582 return create(Mul, LHS, RHS, Ctx);
583 }
584
585 static const MCBinaryExpr *createNE(const MCExpr *LHS, const MCExpr *RHS,
586 MCContext &Ctx) {
587 return create(NE, LHS, RHS, Ctx);
588 }
589
590 static const MCBinaryExpr *createOr(const MCExpr *LHS, const MCExpr *RHS,
591 MCContext &Ctx) {
592 return create(Or, LHS, RHS, Ctx);
593 }
594
595 static const MCBinaryExpr *createShl(const MCExpr *LHS, const MCExpr *RHS,
596 MCContext &Ctx) {
597 return create(Shl, LHS, RHS, Ctx);
598 }
599
600 static const MCBinaryExpr *createAShr(const MCExpr *LHS, const MCExpr *RHS,
601 MCContext &Ctx) {
602 return create(AShr, LHS, RHS, Ctx);
603 }
604
605 static const MCBinaryExpr *createLShr(const MCExpr *LHS, const MCExpr *RHS,
606 MCContext &Ctx) {
607 return create(LShr, LHS, RHS, Ctx);
608 }
609
610 static const MCBinaryExpr *createSub(const MCExpr *LHS, const MCExpr *RHS,
611 MCContext &Ctx) {
612 return create(Sub, LHS, RHS, Ctx);
613 }
614
615 static const MCBinaryExpr *createXor(const MCExpr *LHS, const MCExpr *RHS,
616 MCContext &Ctx) {
617 return create(Xor, LHS, RHS, Ctx);
618 }
619
620 /// @}
621 /// \name Accessors
622 /// @{
623
624 /// Get the kind of this binary expression.
625 Opcode getOpcode() const { return (Opcode)getSubclassData(); }
626
627 /// Get the left-hand side expression of the binary operator.
628 const MCExpr *getLHS() const { return LHS; }
629
630 /// Get the right-hand side expression of the binary operator.
631 const MCExpr *getRHS() const { return RHS; }
632
633 /// @}
634
635 static bool classof(const MCExpr *E) {
636 return E->getKind() == MCExpr::Binary;
637 }
638};
639
640/// This is an extension point for target-specific MCExpr subclasses to
641/// implement.
642///
643/// NOTE: All subclasses are required to have trivial destructors because
644/// MCExprs are bump pointer allocated and not destructed.
645class MCTargetExpr : public MCExpr {
646 virtual void anchor();
647
648protected:
650 virtual ~MCTargetExpr() = default;
651
652public:
653 virtual void printImpl(raw_ostream &OS, const MCAsmInfo *MAI) const = 0;
655 const MCAsmLayout *Layout,
656 const MCFixup *Fixup) const = 0;
657 // allow Target Expressions to be checked for equality
658 virtual bool isEqualTo(const MCExpr *x) const { return false; }
659 // This should be set when assigned expressions are not valid ".set"
660 // expressions, e.g. registers, and must be inlined.
661 virtual bool inlineAssignedExpr() const { return false; }
662 virtual void visitUsedExpr(MCStreamer& Streamer) const = 0;
663 virtual MCFragment *findAssociatedFragment() const = 0;
664
665 virtual void fixELFSymbolsInTLSFixups(MCAssembler &) const = 0;
666
667 static bool classof(const MCExpr *E) {
668 return E->getKind() == MCExpr::Target;
669 }
670};
671
672} // end namespace llvm
673
674#endif // LLVM_MC_MCEXPR_H
static GCRegistry::Add< CoreCLRGC > E("coreclr", "CoreCLR-compatible GC")
This file defines the DenseMap class.
std::string Name
PowerPC TLS Dynamic Call Fixup
assert(ImpDefSCC.getReg()==AMDGPU::SCC &&ImpDefSCC.isDef())
Value * RHS
Value * LHS
This class is intended to be used as a base class for asm properties and features specific to the tar...
Definition: MCAsmInfo.h:56
Encapsulates the layout of an assembly file at a particular point in time.
Definition: MCAsmLayout.h:28
Binary assembler expressions.
Definition: MCExpr.h:481
const MCExpr * getLHS() const
Get the left-hand side expression of the binary operator.
Definition: MCExpr.h:628
static const MCBinaryExpr * createEQ(const MCExpr *LHS, const MCExpr *RHS, MCContext &Ctx)
Definition: MCExpr.h:540
static const MCBinaryExpr * createLShr(const MCExpr *LHS, const MCExpr *RHS, MCContext &Ctx)
Definition: MCExpr.h:605
static const MCBinaryExpr * createLAnd(const MCExpr *LHS, const MCExpr *RHS, MCContext &Ctx)
Definition: MCExpr.h:555
const MCExpr * getRHS() const
Get the right-hand side expression of the binary operator.
Definition: MCExpr.h:631
static const MCBinaryExpr * createXor(const MCExpr *LHS, const MCExpr *RHS, MCContext &Ctx)
Definition: MCExpr.h:615
static const MCBinaryExpr * createAnd(const MCExpr *LHS, const MCExpr *RHS, MCContext &Ctx)
Definition: MCExpr.h:530
static const MCBinaryExpr * createAdd(const MCExpr *LHS, const MCExpr *RHS, MCContext &Ctx)
Definition: MCExpr.h:525
static bool classof(const MCExpr *E)
Definition: MCExpr.h:635
static const MCBinaryExpr * createLT(const MCExpr *LHS, const MCExpr *RHS, MCContext &Ctx)
Definition: MCExpr.h:565
Opcode getOpcode() const
Get the kind of this binary expression.
Definition: MCExpr.h:625
static const MCBinaryExpr * createOr(const MCExpr *LHS, const MCExpr *RHS, MCContext &Ctx)
Definition: MCExpr.h:590
static const MCBinaryExpr * createMod(const MCExpr *LHS, const MCExpr *RHS, MCContext &Ctx)
Definition: MCExpr.h:575
static const MCBinaryExpr * createLOr(const MCExpr *LHS, const MCExpr *RHS, MCContext &Ctx)
Definition: MCExpr.h:560
static const MCBinaryExpr * createNE(const MCExpr *LHS, const MCExpr *RHS, MCContext &Ctx)
Definition: MCExpr.h:585
static const MCBinaryExpr * createGTE(const MCExpr *LHS, const MCExpr *RHS, MCContext &Ctx)
Definition: MCExpr.h:550
static const MCBinaryExpr * createMul(const MCExpr *LHS, const MCExpr *RHS, MCContext &Ctx)
Definition: MCExpr.h:580
static const MCBinaryExpr * createLTE(const MCExpr *LHS, const MCExpr *RHS, MCContext &Ctx)
Definition: MCExpr.h:570
static const MCBinaryExpr * createAShr(const MCExpr *LHS, const MCExpr *RHS, MCContext &Ctx)
Definition: MCExpr.h:600
static const MCBinaryExpr * createGT(const MCExpr *LHS, const MCExpr *RHS, MCContext &Ctx)
Definition: MCExpr.h:545
static const MCBinaryExpr * createDiv(const MCExpr *LHS, const MCExpr *RHS, MCContext &Ctx)
Definition: MCExpr.h:535
static const MCBinaryExpr * create(Opcode Op, const MCExpr *LHS, const MCExpr *RHS, MCContext &Ctx, SMLoc Loc=SMLoc())
Definition: MCExpr.cpp:183
static const MCBinaryExpr * createShl(const MCExpr *LHS, const MCExpr *RHS, MCContext &Ctx)
Definition: MCExpr.h:595
static const MCBinaryExpr * createSub(const MCExpr *LHS, const MCExpr *RHS, MCContext &Ctx)
Definition: MCExpr.h:610
@ Div
Signed division.
Definition: MCExpr.h:486
@ Shl
Shift left.
Definition: MCExpr.h:503
@ AShr
Arithmetic shift right.
Definition: MCExpr.h:504
@ LShr
Logical shift right.
Definition: MCExpr.h:505
@ GTE
Signed greater than or equal comparison (result is either 0 or some target-specific non-zero value).
Definition: MCExpr.h:490
@ EQ
Equality comparison.
Definition: MCExpr.h:487
@ Sub
Subtraction.
Definition: MCExpr.h:506
@ Mul
Multiplication.
Definition: MCExpr.h:499
@ GT
Signed greater than comparison (result is either 0 or some target-specific non-zero value)
Definition: MCExpr.h:488
@ Mod
Signed remainder.
Definition: MCExpr.h:498
@ And
Bitwise and.
Definition: MCExpr.h:485
@ Or
Bitwise or.
Definition: MCExpr.h:501
@ Xor
Bitwise exclusive or.
Definition: MCExpr.h:507
@ OrNot
Bitwise or not.
Definition: MCExpr.h:502
@ LAnd
Logical and.
Definition: MCExpr.h:492
@ LOr
Logical or.
Definition: MCExpr.h:493
@ LT
Signed less than comparison (result is either 0 or some target-specific non-zero value).
Definition: MCExpr.h:494
@ Add
Addition.
Definition: MCExpr.h:484
@ LTE
Signed less than or equal comparison (result is either 0 or some target-specific non-zero value).
Definition: MCExpr.h:496
@ NE
Inequality comparison.
Definition: MCExpr.h:500
static bool classof(const MCExpr *E)
Definition: MCExpr.h:182
bool useHexFormat() const
Definition: MCExpr.h:178
unsigned getSizeInBytes() const
Definition: MCExpr.h:174
int64_t getValue() const
Definition: MCExpr.h:173
static const MCConstantExpr * create(int64_t Value, MCContext &Ctx, bool PrintInHex=false, unsigned SizeInBytes=0)
Definition: MCExpr.cpp:194
Context object for machine code objects.
Definition: MCContext.h:76
Base class for the full range of assembler expressions which are needed for parsing.
Definition: MCExpr.h:35
MCExpr & operator=(const MCExpr &)=delete
MCExpr(ExprKind Kind, SMLoc Loc, unsigned SubclassData=0)
Definition: MCExpr.h:61
@ Unary
Unary expressions.
Definition: MCExpr.h:41
@ Constant
Constant expressions.
Definition: MCExpr.h:39
@ SymbolRef
References to labels and assigned expressions.
Definition: MCExpr.h:40
@ Target
Target specific expression.
Definition: MCExpr.h:42
@ Binary
Binary expressions.
Definition: MCExpr.h:38
MCExpr(const MCExpr &)=delete
bool evaluateKnownAbsolute(int64_t &Res, const MCAsmLayout &Layout) const
Definition: MCExpr.cpp:561
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:749
bool evaluateAsRelocatableImpl(MCValue &Res, const MCAssembler *Asm, const MCAsmLayout *Layout, const MCFixup *Fixup, const SectionAddrMap *Addrs, bool InSet) const
Definition: MCExpr.cpp:776
unsigned getSubclassData() const
Definition: MCExpr.h:72
void print(raw_ostream &OS, const MCAsmInfo *MAI, bool InParens=false) const
Definition: MCExpr.cpp:41
MCFragment * findAssociatedFragment() const
Find the "associated section" for this expression, which is currently defined as the absolute section...
Definition: MCExpr.cpp:987
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:757
void dump() const
Definition: MCExpr.cpp:175
ExprKind getKind() const
Definition: MCExpr.h:81
SMLoc getLoc() const
Definition: MCExpr.h:82
Encode information on a single operation to perform on a byte sequence (e.g., an encoded instruction)...
Definition: MCFixup.h:71
Streaming machine code generation interface.
Definition: MCStreamer.h:212
Represent a reference to a symbol from inside an expression.
Definition: MCExpr.h:192
const MCSymbol & getSymbol() const
Definition: MCExpr.h:399
static bool classof(const MCExpr *E)
Definition: MCExpr.h:419
static StringRef getVariantKindName(VariantKind Kind)
Definition: MCExpr.cpp:221
static VariantKind getVariantKindForName(StringRef Name)
Definition: MCExpr.cpp:389
static const MCSymbolRefExpr * create(const MCSymbol *Symbol, MCContext &Ctx)
Definition: MCExpr.h:386
VariantKind getKind() const
Definition: MCExpr.h:401
bool hasSubsectionsViaSymbols() const
Definition: MCExpr.h:405
MCSymbol - Instances of this class represent a symbol name in the MC file, and MCSymbols are created ...
Definition: MCSymbol.h:41
This is an extension point for target-specific MCExpr subclasses to implement.
Definition: MCExpr.h:645
static bool classof(const MCExpr *E)
Definition: MCExpr.h:667
virtual void visitUsedExpr(MCStreamer &Streamer) const =0
virtual void printImpl(raw_ostream &OS, const MCAsmInfo *MAI) const =0
virtual void fixELFSymbolsInTLSFixups(MCAssembler &) const =0
virtual bool evaluateAsRelocatableImpl(MCValue &Res, const MCAsmLayout *Layout, const MCFixup *Fixup) const =0
virtual MCFragment * findAssociatedFragment() const =0
virtual bool isEqualTo(const MCExpr *x) const
Definition: MCExpr.h:658
virtual bool inlineAssignedExpr() const
Definition: MCExpr.h:661
virtual ~MCTargetExpr()=default
Unary assembler expressions.
Definition: MCExpr.h:425
Opcode getOpcode() const
Get the kind of this unary expression.
Definition: MCExpr.h:468
static bool classof(const MCExpr *E)
Definition: MCExpr.h:475
static const MCUnaryExpr * create(Opcode Op, const MCExpr *Expr, MCContext &Ctx, SMLoc Loc=SMLoc())
Definition: MCExpr.cpp:189
static const MCUnaryExpr * createLNot(const MCExpr *Expr, MCContext &Ctx, SMLoc Loc=SMLoc())
Definition: MCExpr.h:447
@ Minus
Unary minus.
Definition: MCExpr.h:429
@ Plus
Unary plus.
Definition: MCExpr.h:431
@ Not
Bitwise negation.
Definition: MCExpr.h:430
@ LNot
Logical negation.
Definition: MCExpr.h:428
const MCExpr * getSubExpr() const
Get the child of this unary expression.
Definition: MCExpr.h:471
static const MCUnaryExpr * createPlus(const MCExpr *Expr, MCContext &Ctx, SMLoc Loc=SMLoc())
Definition: MCExpr.h:459
static const MCUnaryExpr * createNot(const MCExpr *Expr, MCContext &Ctx, SMLoc Loc=SMLoc())
Definition: MCExpr.h:455
static const MCUnaryExpr * createMinus(const MCExpr *Expr, MCContext &Ctx, SMLoc Loc=SMLoc())
Definition: MCExpr.h:451
This represents an "assembler immediate".
Definition: MCValue.h:36
Represents a location in source code.
Definition: SMLoc.h:23
StringRef - Represent a constant reference to a string, i.e.
Definition: StringRef.h:50
Target - Wrapper for Target specific information.
LLVM Value Representation.
Definition: Value.h:74
This class implements an extremely fast bulk output stream that can only output to a stream.
Definition: raw_ostream.h:52
This is an optimization pass for GlobalISel generic memory operations.
Definition: AddressRanges.h:18
raw_ostream & operator<<(raw_ostream &OS, const APFixedPoint &FX)
Definition: APFixedPoint.h:292