1//===--- Compiler.h - Code generator for 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// Defines the constexpr bytecode compiler.
10//
11//===----------------------------------------------------------------------===//
12
13#ifndef LLVM_CLANG_AST_INTERP_BYTECODEEXPRGEN_H
14#define LLVM_CLANG_AST_INTERP_BYTECODEEXPRGEN_H
15
16#include "ByteCodeEmitter.h"
17#include "EvalEmitter.h"
18#include "Pointer.h"
19#include "PrimType.h"
20#include "Record.h"
21#include "clang/AST/Decl.h"
22#include "clang/AST/Expr.h"
23#include "clang/AST/StmtVisitor.h"
24
25namespace clang {
26class QualType;
27
28namespace interp {
29
30template <class Emitter> class LocalScope;
31template <class Emitter> class DestructorScope;
32template <class Emitter> class VariableScope;
33template <class Emitter> class DeclScope;
34template <class Emitter> class InitLinkScope;
35template <class Emitter> class InitStackScope;
36template <class Emitter> class OptionScope;
37template <class Emitter> class ArrayIndexScope;
38template <class Emitter> class SourceLocScope;
39template <class Emitter> class LoopScope;
40template <class Emitter> class LabelScope;
41template <class Emitter> class SwitchScope;
42template <class Emitter> class StmtExprScope;
43template <class Emitter> class LocOverrideScope;
44
45template <class Emitter> class Compiler;
46struct InitLink {
47public:
48 enum {
49 K_This = 0,
50 K_Field = 1,
51 K_Temp = 2,
52 K_Decl = 3,
53 K_Elem = 5,
54 K_RVO = 6,
55 K_InitList = 7,
56 K_DIE = 8,
57 };
58
59 static InitLink This() { return InitLink{K_This}; }
60 static InitLink InitList() { return InitLink{K_InitList}; }
61 static InitLink RVO() { return InitLink{K_RVO}; }
62 static InitLink DIE() { return InitLink{K_DIE}; }
63 static InitLink Field(unsigned Offset) {
64 InitLink IL{K_Field};
65 IL.Offset = Offset;
66 return IL;
67 }
68 static InitLink Temp(unsigned Offset) {
69 InitLink IL{K_Temp};
70 IL.Offset = Offset;
71 return IL;
72 }
73 static InitLink Decl(const ValueDecl *D) {
74 InitLink IL{K_Decl};
75 IL.D = D;
76 return IL;
77 }
78 static InitLink Elem(unsigned Index) {
79 InitLink IL{K_Elem};
80 IL.Offset = Index;
81 return IL;
82 }
83
84 InitLink(uint8_t Kind) : Kind(Kind) {}
85 template <class Emitter>
86 bool emit(Compiler<Emitter> *Ctx, const Expr *E) const;
87
88 uint32_t Kind;
89 union {
90 unsigned Offset;
91 const ValueDecl *D;
92 };
93};
94
95/// State encapsulating if a the variable creation has been successful,
96/// unsuccessful, or no variable has been created at all.
97struct VarCreationState {
98 std::optional<bool> S = std::nullopt;
99 VarCreationState() = default;
100 VarCreationState(bool b) : S(b) {}
101 static VarCreationState NotCreated() { return VarCreationState(); }
102
103 operator bool() const { return S && *S; }
104 bool notCreated() const { return !S; }
105};
106
107enum class ScopeKind { Block, FullExpression, Call };
108
109/// Compilation context for expressions.
110template <class Emitter>
111class Compiler : public ConstStmtVisitor<Compiler<Emitter>, bool>,
112 public Emitter {
113protected:
114 // Aliases for types defined in the emitter.
115 using LabelTy = typename Emitter::LabelTy;
116 using AddrTy = typename Emitter::AddrTy;
117 using OptLabelTy = UnsignedOrNone;
118 using CaseMap = llvm::DenseMap<const SwitchCase *, LabelTy>;
119
120 struct LabelInfo {
121 const Stmt *Name;
122 const VariableScope<Emitter> *BreakOrContinueScope;
123 OptLabelTy BreakLabel;
124 OptLabelTy ContinueLabel;
125 OptLabelTy DefaultLabel;
126 LabelInfo(const Stmt *Name, OptLabelTy BreakLabel, OptLabelTy ContinueLabel,
127 OptLabelTy DefaultLabel,
128 const VariableScope<Emitter> *BreakOrContinueScope)
129 : Name(Name), BreakOrContinueScope(BreakOrContinueScope),
130 BreakLabel(BreakLabel), ContinueLabel(ContinueLabel),
131 DefaultLabel(DefaultLabel) {}
132 };
133
134 /// Current compilation context.
135 Context &Ctx;
136 /// Program to link to.
137 Program &P;
138
139public:
140 /// Initializes the compiler and the backend emitter.
141 template <typename... Tys>
142 Compiler(Context &Ctx, Program &P, Tys &&...Args)
143 : Emitter(Ctx, P, Args...), Ctx(Ctx), P(P) {}
144
145 // Expressions.
146 bool VisitCastExpr(const CastExpr *E);
147 bool VisitBuiltinBitCastExpr(const BuiltinBitCastExpr *E);
148 bool VisitIntegerLiteral(const IntegerLiteral *E);
149 bool VisitFloatingLiteral(const FloatingLiteral *E);
150 bool VisitImaginaryLiteral(const ImaginaryLiteral *E);
151 bool VisitFixedPointLiteral(const FixedPointLiteral *E);
152 bool VisitParenExpr(const ParenExpr *E);
153 bool VisitBinaryOperator(const BinaryOperator *E);
154 bool VisitLogicalBinOp(const BinaryOperator *E);
155 bool VisitPointerArithBinOp(const BinaryOperator *E);
156 bool VisitComplexBinOp(const BinaryOperator *E);
157 bool VisitVectorBinOp(const BinaryOperator *E);
158 bool VisitFixedPointBinOp(const BinaryOperator *E);
159 bool VisitFixedPointUnaryOperator(const UnaryOperator *E);
160 bool VisitCXXDefaultArgExpr(const CXXDefaultArgExpr *E);
161 bool VisitCallExpr(const CallExpr *E);
162 bool VisitBuiltinCallExpr(const CallExpr *E, unsigned BuiltinID);
163 bool VisitCXXDefaultInitExpr(const CXXDefaultInitExpr *E);
164 bool VisitCXXBoolLiteralExpr(const CXXBoolLiteralExpr *E);
165 bool VisitCXXNullPtrLiteralExpr(const CXXNullPtrLiteralExpr *E);
166 bool VisitGNUNullExpr(const GNUNullExpr *E);
167 bool VisitCXXThisExpr(const CXXThisExpr *E);
168 bool VisitUnaryOperator(const UnaryOperator *E);
169 bool VisitVectorUnaryOperator(const UnaryOperator *E);
170 bool VisitComplexUnaryOperator(const UnaryOperator *E);
171 bool VisitDeclRefExpr(const DeclRefExpr *E);
172 bool VisitImplicitValueInitExpr(const ImplicitValueInitExpr *E);
173 bool VisitSubstNonTypeTemplateParmExpr(const SubstNonTypeTemplateParmExpr *E);
174 bool VisitArraySubscriptExpr(const ArraySubscriptExpr *E);
175 bool VisitInitListExpr(const InitListExpr *E);
176 bool VisitCXXParenListInitExpr(const CXXParenListInitExpr *E);
177 bool VisitConstantExpr(const ConstantExpr *E);
178 bool VisitUnaryExprOrTypeTraitExpr(const UnaryExprOrTypeTraitExpr *E);
179 bool VisitMemberExpr(const MemberExpr *E);
180 bool VisitArrayInitIndexExpr(const ArrayInitIndexExpr *E);
181 bool VisitArrayInitLoopExpr(const ArrayInitLoopExpr *E);
182 bool VisitOpaqueValueExpr(const OpaqueValueExpr *E);
183 bool VisitAbstractConditionalOperator(const AbstractConditionalOperator *E);
184 bool VisitStringLiteral(const StringLiteral *E);
185 bool VisitObjCStringLiteral(const ObjCStringLiteral *E);
186 bool VisitObjCEncodeExpr(const ObjCEncodeExpr *E);
187 bool VisitSYCLUniqueStableNameExpr(const SYCLUniqueStableNameExpr *E);
188 bool VisitCharacterLiteral(const CharacterLiteral *E);
189 bool VisitCompoundAssignOperator(const CompoundAssignOperator *E);
190 bool VisitFloatCompoundAssignOperator(const CompoundAssignOperator *E);
191 bool VisitPointerCompoundAssignOperator(const CompoundAssignOperator *E);
192 bool VisitExprWithCleanups(const ExprWithCleanups *E);
193 bool VisitMaterializeTemporaryExpr(const MaterializeTemporaryExpr *E);
194 bool VisitCXXBindTemporaryExpr(const CXXBindTemporaryExpr *E);
195 bool VisitCompoundLiteralExpr(const CompoundLiteralExpr *E);
196 bool VisitTypeTraitExpr(const TypeTraitExpr *E);
197 bool VisitArrayTypeTraitExpr(const ArrayTypeTraitExpr *E);
198 bool VisitLambdaExpr(const LambdaExpr *E);
199 bool VisitPredefinedExpr(const PredefinedExpr *E);
200 bool VisitCXXThrowExpr(const CXXThrowExpr *E);
201 bool VisitCXXReinterpretCastExpr(const CXXReinterpretCastExpr *E);
202 bool VisitCXXDynamicCastExpr(const CXXDynamicCastExpr *E);
203 bool VisitCXXNoexceptExpr(const CXXNoexceptExpr *E);
204 bool VisitCXXConstructExpr(const CXXConstructExpr *E);
205 bool VisitSourceLocExpr(const SourceLocExpr *E);
206 bool VisitOffsetOfExpr(const OffsetOfExpr *E);
207 bool VisitCXXScalarValueInitExpr(const CXXScalarValueInitExpr *E);
208 bool VisitSizeOfPackExpr(const SizeOfPackExpr *E);
209 bool VisitGenericSelectionExpr(const GenericSelectionExpr *E);
210 bool VisitChooseExpr(const ChooseExpr *E);
211 bool VisitEmbedExpr(const EmbedExpr *E);
212 bool VisitObjCBoolLiteralExpr(const ObjCBoolLiteralExpr *E);
213 bool VisitCXXInheritedCtorInitExpr(const CXXInheritedCtorInitExpr *E);
214 bool VisitExpressionTraitExpr(const ExpressionTraitExpr *E);
215 bool VisitCXXUuidofExpr(const CXXUuidofExpr *E);
216 bool VisitRequiresExpr(const RequiresExpr *E);
217 bool VisitConceptSpecializationExpr(const ConceptSpecializationExpr *E);
218 bool VisitCXXRewrittenBinaryOperator(const CXXRewrittenBinaryOperator *E);
219 bool VisitPseudoObjectExpr(const PseudoObjectExpr *E);
220 bool VisitPackIndexingExpr(const PackIndexingExpr *E);
221 bool VisitRecoveryExpr(const RecoveryExpr *E);
222 bool VisitAddrLabelExpr(const AddrLabelExpr *E);
223 bool VisitConvertVectorExpr(const ConvertVectorExpr *E);
224 bool VisitShuffleVectorExpr(const ShuffleVectorExpr *E);
225 bool VisitExtVectorElementExpr(const ExtVectorElementExpr *E);
226 bool VisitObjCBoxedExpr(const ObjCBoxedExpr *E);
227 bool VisitCXXStdInitializerListExpr(const CXXStdInitializerListExpr *E);
228 bool VisitStmtExpr(const StmtExpr *E);
229 bool VisitCXXNewExpr(const CXXNewExpr *E);
230 bool VisitCXXDeleteExpr(const CXXDeleteExpr *E);
231 bool VisitBlockExpr(const BlockExpr *E);
232 bool VisitCXXTypeidExpr(const CXXTypeidExpr *E);
233 bool VisitObjCDictionaryLiteral(const ObjCDictionaryLiteral *E);
234 bool VisitObjCArrayLiteral(const ObjCArrayLiteral *E);
235 bool VisitDesignatedInitUpdateExpr(const DesignatedInitUpdateExpr *E);
236
237 // Statements.
238 bool visitCompoundStmt(const CompoundStmt *S);
239 bool visitDeclStmt(const DeclStmt *DS, bool EvaluateConditionDecl = false);
240 bool visitReturnStmt(const ReturnStmt *RS);
241 bool visitIfStmt(const IfStmt *IS);
242 bool visitWhileStmt(const WhileStmt *S);
243 bool visitDoStmt(const DoStmt *S);
244 bool visitForStmt(const ForStmt *S);
245 bool visitCXXForRangeStmt(const CXXForRangeStmt *S);
246 bool visitBreakStmt(const BreakStmt *S);
247 bool visitContinueStmt(const ContinueStmt *S);
248 bool visitSwitchStmt(const SwitchStmt *S);
249 bool visitCaseStmt(const CaseStmt *S);
250 bool visitDefaultStmt(const DefaultStmt *S);
251 bool visitAttributedStmt(const AttributedStmt *S);
252 bool visitCXXTryStmt(const CXXTryStmt *S);
253 bool
254 visitCXXExpansionStmtInstantiation(const CXXExpansionStmtInstantiation *S);
255
256protected:
257 bool visitStmt(const Stmt *S);
258 bool visitExpr(const Expr *E, bool DestroyToplevelScope) override;
259 bool visitLValueExpr(const Expr *E, bool DestroyToplevelScope) override;
260 bool visitFunc(const FunctionDecl *F) override;
261
262 bool visitDeclAndReturn(const VarDecl *VD, const Expr *Init,
263 bool ConstantContext) override;
264 bool visitDtorCall(const VarDecl *VD, const APValue &Value) override;
265 bool visitWithSubstitutions(const FunctionDecl *Callee,
266 ArrayRef<const Expr *> Args, const Expr *This,
267 const Expr *Condition) override;
268
269protected:
270 /// Emits scope cleanup instructions.
271 bool emitCleanup();
272
273 /// Returns a record type from a record or pointer type.
274 const RecordType *getRecordTy(QualType Ty);
275
276 /// Returns a record from a record or pointer type.
277 Record *getRecord(QualType Ty);
278 Record *getRecord(const RecordDecl *RD);
279
280 /// Returns a function for the given FunctionDecl.
281 /// If the function does not exist yet, it is compiled.
282 const Function *getFunction(const FunctionDecl *FD);
283
284 OptPrimType classify(const Expr *E) const { return Ctx.classify(E); }
285 OptPrimType classify(QualType Ty) const { return Ctx.classify(T: Ty); }
286 bool canClassify(const Expr *E) const { return Ctx.canClassify(E); }
287 bool canClassify(QualType T) const { return Ctx.canClassify(T); }
288
289 /// Classifies a known primitive type.
290 PrimType classifyPrim(QualType Ty) const {
291 if (auto T = classify(Ty)) {
292 return *T;
293 }
294 llvm_unreachable("not a primitive type");
295 }
296 /// Classifies a known primitive expression.
297 PrimType classifyPrim(const Expr *E) const {
298 if (auto T = classify(E))
299 return *T;
300 llvm_unreachable("not a primitive type");
301 }
302
303 /// Evaluates an expression and places the result on the stack. If the
304 /// expression is of composite type, a local variable will be created
305 /// and a pointer to said variable will be placed on the stack.
306 bool visit(const Expr *E) override;
307 /// Compiles an initializer. This is like visit() but it will never
308 /// create a variable and instead rely on a variable already having
309 /// been created. visitInitializer() then relies on a pointer to this
310 /// variable being on top of the stack.
311 bool visitInitializer(const Expr *E);
312 /// Similar, but will also pop the pointer.
313 bool visitInitializerPop(const Expr *E);
314 bool visitAsLValue(const Expr *E);
315 /// Evaluates an expression for side effects and discards the result.
316 bool discard(const Expr *E);
317 /// Just pass evaluation on to \p E. This leaves all the parsing flags
318 /// intact.
319 bool delegate(const Expr *E);
320 /// Creates and initializes a variable from the given decl.
321 VarCreationState visitVarDecl(const VarDecl *VD, const Expr *Init,
322 bool Toplevel = false);
323 VarCreationState visitDecl(const VarDecl *VD);
324 /// Visit an APValue.
325 bool visitAPValue(const APValue &Val, PrimType ValType, SourceInfo Info);
326 bool visitAPValueInitializer(const APValue &Val, SourceInfo Info, QualType T,
327 bool IsCompleteClass = true);
328 /// Visit the given decl as if we have a reference to it.
329 bool visitDeclRef(const ValueDecl *D, const Expr *E);
330
331 /// Visits an expression and converts it to a boolean.
332 bool visitBool(const Expr *E);
333
334 bool visitInitList(ArrayRef<const Expr *> Inits, const Expr *ArrayFiller,
335 const Expr *E);
336 bool visitArrayElemInit(unsigned ElemIndex, const Expr *Init,
337 OptPrimType InitT);
338 bool visitCallArgs(ArrayRef<const Expr *> Args, const FunctionDecl *FuncDecl,
339 bool Activate, bool IsOperatorCall);
340
341 /// Creates a local primitive value.
342 unsigned allocateLocalPrimitive(DeclTy &&Decl, PrimType Ty, bool IsConst,
343 bool IsVolatile = false,
344 ScopeKind SC = ScopeKind::Block);
345
346 /// Allocates a space storing a local given its type.
347 UnsignedOrNone allocateLocal(DeclTy &&Decl, QualType Ty = QualType(),
348 ScopeKind = ScopeKind::Block);
349 UnsignedOrNone allocateTemporary(const Expr *E);
350
351private:
352 friend class VariableScope<Emitter>;
353 friend class LocalScope<Emitter>;
354 friend class DestructorScope<Emitter>;
355 friend class DeclScope<Emitter>;
356 friend class InitLinkScope<Emitter>;
357 friend class InitStackScope<Emitter>;
358 friend class OptionScope<Emitter>;
359 friend class ArrayIndexScope<Emitter>;
360 friend class SourceLocScope<Emitter>;
361 friend struct InitLink;
362 friend class LoopScope<Emitter>;
363 friend class LabelScope<Emitter>;
364 friend class SwitchScope<Emitter>;
365 friend class StmtExprScope<Emitter>;
366 friend class LocOverrideScope<Emitter>;
367
368 /// Emits a zero initializer.
369 bool visitZeroInitializer(PrimType T, QualType QT, const Expr *E);
370 bool visitZeroRecordInitializer(const Record *R, const Expr *E,
371 bool IsCompleteClass = true);
372 bool visitZeroArrayInitializer(QualType T, const Expr *E);
373 bool visitAssignment(const Expr *LHS, const Expr *RHS, const Expr *E);
374
375 /// Emits an APSInt constant.
376 bool emitConst(const llvm::APSInt &Value, PrimType Ty, SourceInfo Info);
377 bool emitConst(const llvm::APInt &Value, PrimType Ty, SourceInfo Info);
378 bool emitConst(const llvm::APSInt &Value, const Expr *E);
379 bool emitConst(const llvm::APInt &Value, const Expr *E) {
380 return emitConst(Value, classifyPrim(E), E);
381 }
382
383 /// Emits an integer constant.
384 template <typename T> bool emitConst(T Value, PrimType Ty, SourceInfo Info);
385 template <typename T> bool emitConst(T Value, const Expr *E);
386 bool emitBool(bool V, const Expr *E) override {
387 return this->emitConst(V, E);
388 }
389
390 llvm::RoundingMode getRoundingMode(const Expr *E) const {
391 FPOptions FPO = E->getFPFeaturesInEffect(LO: Ctx.getLangOpts());
392
393 if (FPO.getRoundingMode() == llvm::RoundingMode::Dynamic)
394 return llvm::RoundingMode::NearestTiesToEven;
395
396 return FPO.getRoundingMode();
397 }
398
399 uint32_t getFPOptions(const Expr *E) const {
400 return E->getFPFeaturesInEffect(LO: Ctx.getLangOpts()).getAsOpaqueInt();
401 }
402
403 bool emitPrimCast(PrimType FromT, PrimType ToT, QualType ToQT, const Expr *E);
404 bool emitIntegralCast(PrimType FromT, PrimType ToT, QualType ToQT,
405 const Expr *E);
406 PrimType classifyComplexElementType(QualType T) const {
407 assert(T->isAnyComplexType());
408
409 QualType ElemType = T->getAs<ComplexType>()->getElementType();
410
411 return *this->classify(ElemType);
412 }
413
414 PrimType classifyVectorElementType(QualType T) const {
415 assert(T->isVectorType());
416 return *this->classify(T->getAs<VectorType>()->getElementType());
417 }
418
419 PrimType classifyMatrixElementType(QualType T) const {
420 assert(T->isMatrixType());
421 return *this->classify(T->getAs<MatrixType>()->getElementType());
422 }
423
424 bool emitComplexReal(const Expr *SubExpr);
425 bool emitComplexBoolCast(const Expr *E);
426 bool emitComplexComparison(const Expr *LHS, const Expr *RHS,
427 const BinaryOperator *E);
428 bool emitRecordDestructionPop(const Record *R, SourceInfo Loc);
429 bool emitDestructionPop(const Descriptor *Desc, SourceInfo Loc);
430 bool emitDummyPtr(const DeclTy &D, const Expr *E, bool CU = false);
431 bool emitFloat(const APFloat &F, SourceInfo Info);
432 unsigned collectBaseOffset(const QualType BaseType,
433 const QualType DerivedType);
434 bool emitLambdaStaticInvokerBody(const CXXMethodDecl *MD);
435 bool emitBuiltinBitCast(const CastExpr *E);
436
437 bool emitHLSLAggregateSplat(PrimType SrcT, unsigned SrcOffset,
438 QualType DestType, const Expr *E);
439 bool emitVectorConversion(const Expr *Src, const Expr *E);
440
441 /// A scalar element extracted during HLSL aggregate flattening.
442 struct HLSLFlatElement {
443 unsigned LocalOffset;
444 PrimType Type;
445 };
446 unsigned countHLSLFlatElements(QualType Ty);
447 bool emitHLSLFlattenAggregate(QualType SrcType, unsigned SrcPtrOffset,
448 SmallVectorImpl<HLSLFlatElement> &Elements,
449 unsigned MaxElements, const Expr *E);
450 bool emitHLSLConstructAggregate(QualType DestType,
451 ArrayRef<HLSLFlatElement> Elements,
452 unsigned &ElemIdx, const Expr *E);
453 bool emitHLSLConstructAggregate(QualType DestType,
454 ArrayRef<HLSLFlatElement> Elements,
455 const Expr *E) {
456 unsigned ElemIdx = 0;
457 return emitHLSLConstructAggregate(DestType, Elements, ElemIdx, E);
458 }
459
460 bool compileConstructor(const CXXConstructorDecl *Ctor);
461 bool compileDestructor(const CXXDestructorDecl *Dtor);
462 bool compileUnionAssignmentOperator(const CXXMethodDecl *MD);
463
464 bool checkLiteralType(const Expr *E);
465 bool maybeEmitDeferredVarInit(const VarDecl *VD);
466
467 bool refersToUnion(const Expr *E);
468
469protected:
470 /// Variable to storage mapping.
471 llvm::DenseMap<const ValueDecl *, Scope::Local> Locals;
472
473 /// OpaqueValueExpr to location mapping.
474 llvm::DenseMap<const OpaqueValueExpr *, unsigned> OpaqueExprs;
475
476 /// Current scope.
477 VariableScope<Emitter> *VarScope = nullptr;
478
479 /// Current argument index. Needed to emit ArrayInitIndexExpr.
480 std::optional<uint64_t> ArrayIndex;
481
482 /// DefaultInit- or DefaultArgExpr, needed for SourceLocExpr.
483 const Expr *SourceLocDefaultExpr = nullptr;
484
485 /// Flag indicating if return value is to be discarded.
486 bool DiscardResult = false;
487
488 bool SwitchInStmtExpr = false;
489 bool InStmtExpr = false;
490 bool ToLValue = false;
491
492 bool VariablesAreConstexprUnknown = false;
493
494 /// Flag inidicating if we're initializing an already created
495 /// variable. This is set in visitInitializer().
496 bool Initializing = false;
497 const ValueDecl *InitializingDecl = nullptr;
498
499 llvm::SmallVector<InitLink> InitStack;
500 bool InitStackActive = false;
501
502 /// Type of the expression returned by the function.
503 OptPrimType ReturnType;
504
505 /// Switch case mapping.
506 CaseMap CaseLabels;
507 /// Stack of label information for loops and switch statements.
508 llvm::SmallVector<LabelInfo> LabelInfoStack;
509
510 const FunctionDecl *CompilingFunction = nullptr;
511};
512
513extern template class Compiler<ByteCodeEmitter>;
514extern template class Compiler<EvalEmitter>;
515
516} // namespace interp
517} // namespace clang
518
519#endif
520