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📄 ABIInfo.h(5.01 KB)
📄 Address.h(3.28 KB)
📄 BackendUtil.cpp(67.92 KB)
📄 CGAtomic.cpp(85.95 KB)
📄 CGBlocks.cpp(111.14 KB)
📄 CGBlocks.h(8.94 KB)
📄 CGBuilder.h(13.78 KB)
📄 CGBuiltin.cpp(695.8 KB)
📄 CGCUDANV.cpp(35.16 KB)
📄 CGCUDARuntime.cpp(1.53 KB)
📄 CGCUDARuntime.h(3.4 KB)
📄 CGCXX.cpp(11.8 KB)
📄 CGCXXABI.cpp(12.47 KB)
📄 CGCXXABI.h(27.9 KB)
📄 CGCall.cpp(197.3 KB)
📄 CGCall.h(11.62 KB)
📄 CGClass.cpp(113.54 KB)
📄 CGCleanup.cpp(46.97 KB)
📄 CGCleanup.h(19.28 KB)
📄 CGCoroutine.cpp(27.82 KB)
📄 CGDebugInfo.cpp(191.42 KB)
📄 CGDebugInfo.h(34.73 KB)
📄 CGDecl.cpp(97.98 KB)
📄 CGDeclCXX.cpp(34.73 KB)
📄 CGException.cpp(80.38 KB)
📄 CGExpr.cpp(209.78 KB)
📄 CGExprAgg.cpp(77.04 KB)
📄 CGExprCXX.cpp(90.39 KB)
📄 CGExprComplex.cpp(44.9 KB)
📄 CGExprConstant.cpp(86.17 KB)
📄 CGExprScalar.cpp(196.29 KB)
📄 CGGPUBuiltin.cpp(6.17 KB)
📄 CGLoopInfo.cpp(29.17 KB)
📄 CGLoopInfo.h(10.5 KB)
📄 CGNonTrivialStruct.cpp(41.4 KB)
📄 CGObjC.cpp(142.79 KB)
📄 CGObjCGNU.cpp(168.38 KB)
📄 CGObjCMac.cpp(304.84 KB)
📄 CGObjCRuntime.cpp(14.68 KB)
📄 CGObjCRuntime.h(14.81 KB)
📄 CGOpenCLRuntime.cpp(7.08 KB)
📄 CGOpenCLRuntime.h(3.44 KB)
📄 CGOpenMPRuntime.cpp(501.86 KB)
📄 CGOpenMPRuntime.h(111.87 KB)
📄 CGOpenMPRuntimeNVPTX.cpp(215.42 KB)
📄 CGOpenMPRuntimeNVPTX.h(22.59 KB)
📄 CGRecordLayout.h(7.84 KB)
📄 CGRecordLayoutBuilder.cpp(38.24 KB)
📄 CGStmt.cpp(92.92 KB)
📄 CGStmtOpenMP.cpp(278.04 KB)
📄 CGVTT.cpp(6.81 KB)
📄 CGVTables.cpp(55.02 KB)
📄 CGVTables.h(6.38 KB)
📄 CGValue.h(21.24 KB)
📄 CodeGenABITypes.cpp(5 KB)
📄 CodeGenAction.cpp(46.2 KB)
📄 CodeGenFunction.cpp(95.34 KB)
📄 CodeGenFunction.h(200.94 KB)
📄 CodeGenModule.cpp(228.13 KB)
📄 CodeGenModule.h(60.91 KB)
📄 CodeGenPGO.cpp(36.17 KB)
📄 CodeGenPGO.h(4.36 KB)
📄 CodeGenTBAA.cpp(16.92 KB)
📄 CodeGenTBAA.h(9.19 KB)
📄 CodeGenTypeCache.h(3.28 KB)
📄 CodeGenTypes.cpp(32.35 KB)
📄 CodeGenTypes.h(13.42 KB)
📄 ConstantEmitter.h(6.65 KB)
📄 ConstantInitBuilder.cpp(10.29 KB)
📄 CoverageMappingGen.cpp(54.64 KB)
📄 CoverageMappingGen.h(4.04 KB)
📄 EHScopeStack.h(14.38 KB)
📄 ItaniumCXXABI.cpp(176.66 KB)
📄 MacroPPCallbacks.cpp(6.41 KB)
📄 MacroPPCallbacks.h(4.54 KB)
📄 MicrosoftCXXABI.cpp(175.41 KB)
📄 ModuleBuilder.cpp(11.79 KB)
📄 ObjectFilePCHContainerOperations.cpp(12.93 KB)
📄 PatternInit.cpp(4.1 KB)
📄 PatternInit.h(722 B)
📄 SanitizerMetadata.cpp(4.21 KB)
📄 SanitizerMetadata.h(1.63 KB)
📄 SwiftCallingConv.cpp(29.76 KB)
📄 TargetInfo.cpp(403.11 KB)
📄 TargetInfo.h(15.43 KB)
📄 VarBypassDetector.cpp(5.1 KB)
📄 VarBypassDetector.h(2.29 KB)

Editing: ConstantEmitter.h

//===--- ConstantEmitter.h - IR constant emission ---------------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// A helper class for emitting expressions and values as llvm::Constants
// and as initializers for global variables.
//
//===----------------------------------------------------------------------===//

#ifndef LLVM_CLANG_LIB_CODEGEN_CONSTANTEMITTER_H
#define LLVM_CLANG_LIB_CODEGEN_CONSTANTEMITTER_H

#include "CodeGenFunction.h"
#include "CodeGenModule.h"

namespace clang {
namespace CodeGen {

class ConstantEmitter {
public:
  CodeGenModule &CGM;
  CodeGenFunction *const CGF;

private:
  bool Abstract = false;

/// Whether non-abstract components of the emitter have been initialized.
  bool InitializedNonAbstract = false;

/// Whether the emitter has been finalized.
  bool Finalized = false;

/// Whether the constant-emission failed.
  bool Failed = false;

/// Whether we're in a constant context.
  bool InConstantContext = false;

/// The AST address space where this (non-abstract) initializer is going.
  /// Used for generating appropriate placeholders.
  LangAS DestAddressSpace;

llvm::SmallVector<std::pair<llvm::Constant *, llvm::GlobalVariable*>, 4>
    PlaceholderAddresses;

public:
  ConstantEmitter(CodeGenModule &CGM, CodeGenFunction *CGF = nullptr)
    : CGM(CGM), CGF(CGF) {}

/// Initialize this emission in the context of the given function.
  /// Use this if the expression might contain contextual references like
  /// block addresses or PredefinedExprs.
  ConstantEmitter(CodeGenFunction &CGF)
    : CGM(CGF.CGM), CGF(&CGF) {}

ConstantEmitter(const ConstantEmitter &other) = delete;
  ConstantEmitter &operator=(const ConstantEmitter &other) = delete;

~ConstantEmitter();

/// Is the current emission context abstract?
  bool isAbstract() const {
    return Abstract;
  }

/// Try to emit the initiaizer of the given declaration as an abstract
  /// constant.  If this succeeds, the emission must be finalized.
  llvm::Constant *tryEmitForInitializer(const VarDecl &D);
  llvm::Constant *tryEmitForInitializer(const Expr *E, LangAS destAddrSpace,
                                        QualType destType);
  llvm::Constant *emitForInitializer(const APValue &value, LangAS destAddrSpace,
                                     QualType destType);

void finalize(llvm::GlobalVariable *global);

// All of the "abstract" emission methods below permit the emission to
  // be immediately discarded without finalizing anything.  Therefore, they
  // must also promise not to do anything that will, in the future, require
  // finalization:
  //
  //   - using the CGF (if present) for anything other than establishing
  //     semantic context; for example, an expression with ignored
  //     side-effects must not be emitted as an abstract expression
  //
  //   - doing anything that would not be safe to duplicate within an
  //     initializer or to propagate to another context; for example,
  //     side effects, or emitting an initialization that requires a
  //     reference to its current location.

/// Try to emit the initializer of the given declaration as an abstract
  /// constant.
  llvm::Constant *tryEmitAbstractForInitializer(const VarDecl &D);

/// Emit the result of the given expression as an abstract constant,
  /// asserting that it succeeded.  This is only safe to do when the
  /// expression is known to be a constant expression with either a fairly
  /// simple type or a known simple form.
  llvm::Constant *emitAbstract(const Expr *E, QualType T);
  llvm::Constant *emitAbstract(SourceLocation loc, const APValue &value,
                               QualType T);

/// Try to emit the result of the given expression as an abstract constant.
  llvm::Constant *tryEmitAbstract(const Expr *E, QualType T);
  llvm::Constant *tryEmitAbstractForMemory(const Expr *E, QualType T);

llvm::Constant *tryEmitAbstract(const APValue &value, QualType T);
  llvm::Constant *tryEmitAbstractForMemory(const APValue &value, QualType T);

llvm::Constant *tryEmitConstantExpr(const ConstantExpr *CE);

llvm::Constant *emitNullForMemory(QualType T) {
    return emitNullForMemory(CGM, T);
  }
  llvm::Constant *emitForMemory(llvm::Constant *C, QualType T) {
    return emitForMemory(CGM, C, T);
  }

static llvm::Constant *emitNullForMemory(CodeGenModule &CGM, QualType T);
  static llvm::Constant *emitForMemory(CodeGenModule &CGM, llvm::Constant *C,
                                       QualType T);

// These are private helper routines of the constant emitter that
  // can't actually be private because things are split out into helper
  // functions and classes.

llvm::Constant *tryEmitPrivateForVarInit(const VarDecl &D);

llvm::Constant *tryEmitPrivate(const Expr *E, QualType T);
  llvm::Constant *tryEmitPrivateForMemory(const Expr *E, QualType T);

llvm::Constant *tryEmitPrivate(const APValue &value, QualType T);
  llvm::Constant *tryEmitPrivateForMemory(const APValue &value, QualType T);

/// Get the address of the current location.  This is a constant
  /// that will resolve, after finalization, to the address of the
  /// 'signal' value that is registered with the emitter later.
  llvm::GlobalValue *getCurrentAddrPrivate();

/// Register a 'signal' value with the emitter to inform it where to
  /// resolve a placeholder.  The signal value must be unique in the
  /// initializer; it might, for example, be the address of a global that
  /// refers to the current-address value in its own initializer.
  ///
  /// Uses of the placeholder must be properly anchored before finalizing
  /// the emitter, e.g. by being installed as the initializer of a global
  /// variable.  That is, it must be possible to replaceAllUsesWith
  /// the placeholder with the proper address of the signal.
  void registerCurrentAddrPrivate(llvm::Constant *signal,
                                  llvm::GlobalValue *placeholder);

private:
  void initializeNonAbstract(LangAS destAS) {
    assert(!InitializedNonAbstract);
    InitializedNonAbstract = true;
    DestAddressSpace = destAS;
  }
  llvm::Constant *markIfFailed(llvm::Constant *init) {
    if (!init)
      Failed = true;
    return init;
  }

struct AbstractState {
    bool OldValue;
    size_t OldPlaceholdersSize;
  };
  AbstractState pushAbstract() {
    AbstractState saved = { Abstract, PlaceholderAddresses.size() };
    Abstract = true;
    return saved;
  }
  llvm::Constant *validateAndPopAbstract(llvm::Constant *C, AbstractState save);
};

}
}

#endif

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