Coverage Report

Created: 2021-08-24 07:12

/Users/buildslave/jenkins/workspace/coverage/llvm-project/clang/lib/Sema/Scope.cpp
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//===- Scope.cpp - Lexical scope information --------------------*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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// This file implements the Scope class, which is used for recording
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// information about a lexical scope.
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//
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//===----------------------------------------------------------------------===//
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#include "clang/Sema/Scope.h"
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#include "clang/AST/Decl.h"
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#include "llvm/Support/raw_ostream.h"
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using namespace clang;
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42.5M
void Scope::setFlags(Scope *parent, unsigned flags) {
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  AnyParent = parent;
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  Flags = flags;
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42.5M
  if (parent && 
!(flags & FnScope)42.4M
) {
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38.6M
    BreakParent    = parent->BreakParent;
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38.6M
    ContinueParent = parent->ContinueParent;
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38.6M
  } else {
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    // Control scopes do not contain the contents of nested function scopes for
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    // control flow purposes.
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3.87M
    BreakParent = ContinueParent = nullptr;
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3.87M
  }
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42.5M
  if (parent) {
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    Depth = parent->Depth + 1;
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    PrototypeDepth = parent->PrototypeDepth;
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    PrototypeIndex = 0;
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42.4M
    FnParent       = parent->FnParent;
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42.4M
    BlockParent    = parent->BlockParent;
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42.4M
    TemplateParamParent = parent->TemplateParamParent;
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    MSLastManglingParent = parent->MSLastManglingParent;
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    MSCurManglingNumber = getMSLastManglingNumber();
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    if ((Flags & (FnScope | ClassScope | BlockScope | TemplateParamScope |
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                  FunctionPrototypeScope | AtCatchScope | ObjCMethodScope)) ==
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        0)
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2.96M
      Flags |= parent->getFlags() & OpenMPSimdDirectiveScope;
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42.4M
  } else {
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94.3k
    Depth = 0;
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    PrototypeDepth = 0;
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    PrototypeIndex = 0;
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94.3k
    MSLastManglingParent = FnParent = BlockParent = nullptr;
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94.3k
    TemplateParamParent = nullptr;
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94.3k
    MSLastManglingNumber = 1;
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94.3k
    MSCurManglingNumber = 1;
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  }
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  // If this scope is a function or contains breaks/continues, remember it.
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42.5M
  if (flags & FnScope)            
FnParent = this3.78M
;
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  // The MS mangler uses the number of scopes that can hold declarations as
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  // part of an external name.
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42.5M
  if (Flags & (ClassScope | FnScope)) {
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5.12M
    MSLastManglingNumber = getMSLastManglingNumber();
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5.12M
    MSLastManglingParent = this;
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    MSCurManglingNumber = 1;
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5.12M
  }
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  if (flags & BreakScope)         
BreakParent = this51.3k
;
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  if (flags & ContinueScope)      
ContinueParent = this51.3k
;
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42.5M
  if (flags & BlockScope)         
BlockParent = this10.8k
;
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  if (flags & TemplateParamScope) 
TemplateParamParent = this1.34M
;
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  // If this is a prototype scope, record that.
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  if (flags & FunctionPrototypeScope) 
PrototypeDepth++33.0M
;
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  if (flags & DeclScope) {
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40.7M
    if (flags & FunctionPrototypeScope)
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33.0M
      ; // Prototype scopes are uninteresting.
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7.76M
    else if ((flags & ClassScope) && 
getParent()->isClassScope()1.33M
)
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      ; // Nested class scopes aren't ambiguous.
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7.48M
    else if ((flags & ClassScope) && 
getParent()->getFlags() == DeclScope1.06M
)
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      ; // Classes inside of namespaces aren't ambiguous.
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6.81M
    else if ((flags & EnumScope))
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      ; // Don't increment for enum scopes.
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6.34M
    else
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      incrementMSManglingNumber();
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40.7M
  }
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}
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42.5M
void Scope::Init(Scope *parent, unsigned flags) {
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  setFlags(parent, flags);
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  DeclsInScope.clear();
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  UsingDirectives.clear();
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  Entity = nullptr;
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  ErrorTrap.reset();
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  NRVO.setPointerAndInt(nullptr, 0);
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}
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bool Scope::containedInPrototypeScope() const {
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  const Scope *S = this;
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  while (S) {
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    if (S->isFunctionPrototypeScope())
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      return true;
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    S = S->getParent();
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  }
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  return false;
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}
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void Scope::AddFlags(unsigned FlagsToSet) {
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  assert((FlagsToSet & ~(BreakScope | ContinueScope)) == 0 &&
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         "Unsupported scope flags");
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  if (FlagsToSet & BreakScope) {
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    assert((Flags & BreakScope) == 0 && "Already set");
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    BreakParent = this;
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  }
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  if (FlagsToSet & ContinueScope) {
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    assert((Flags & ContinueScope) == 0 && "Already set");
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    ContinueParent = this;
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  }
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  Flags |= FlagsToSet;
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}
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42.4M
void Scope::mergeNRVOIntoParent() {
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  if (VarDecl *Candidate = NRVO.getPointer()) {
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    if (isDeclScope(Candidate))
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      Candidate->setNRVOVariable(true);
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  }
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  if (getEntity())
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    return;
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  if (NRVO.getInt())
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    getParent()->setNoNRVO();
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  else if (NRVO.getPointer())
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    getParent()->addNRVOCandidate(NRVO.getPointer());
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}
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0
LLVM_DUMP_METHOD void Scope::dump() const { dumpImpl(llvm::errs()); }
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void Scope::dumpImpl(raw_ostream &OS) const {
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  unsigned Flags = getFlags();
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  bool HasFlags = Flags != 0;
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  if (HasFlags)
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    OS << "Flags: ";
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  std::pair<unsigned, const char *> FlagInfo[] = {
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      {FnScope, "FnScope"},
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      {BreakScope, "BreakScope"},
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      {ContinueScope, "ContinueScope"},
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      {DeclScope, "DeclScope"},
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      {ControlScope, "ControlScope"},
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      {ClassScope, "ClassScope"},
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      {BlockScope, "BlockScope"},
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      {TemplateParamScope, "TemplateParamScope"},
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      {FunctionPrototypeScope, "FunctionPrototypeScope"},
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      {FunctionDeclarationScope, "FunctionDeclarationScope"},
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      {AtCatchScope, "AtCatchScope"},
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      {ObjCMethodScope, "ObjCMethodScope"},
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      {SwitchScope, "SwitchScope"},
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      {TryScope, "TryScope"},
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      {FnTryCatchScope, "FnTryCatchScope"},
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      {OpenMPDirectiveScope, "OpenMPDirectiveScope"},
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      {OpenMPLoopDirectiveScope, "OpenMPLoopDirectiveScope"},
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      {OpenMPSimdDirectiveScope, "OpenMPSimdDirectiveScope"},
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      {EnumScope, "EnumScope"},
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      {SEHTryScope, "SEHTryScope"},
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      {SEHExceptScope, "SEHExceptScope"},
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      {SEHFilterScope, "SEHFilterScope"},
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      {CompoundStmtScope, "CompoundStmtScope"},
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      {ClassInheritanceScope, "ClassInheritanceScope"},
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      {CatchScope, "CatchScope"},
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  };
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  for (auto Info : FlagInfo) {
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    if (Flags & Info.first) {
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      OS << Info.second;
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      Flags &= ~Info.first;
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      if (Flags)
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        OS << " | ";
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    }
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  }
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  assert(Flags == 0 && "Unknown scope flags");
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  if (HasFlags)
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    OS << '\n';
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  if (const Scope *Parent = getParent())
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    OS << "Parent: (clang::Scope*)" << Parent << '\n';
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  OS << "Depth: " << Depth << '\n';
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  OS << "MSLastManglingNumber: " << getMSLastManglingNumber() << '\n';
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  OS << "MSCurManglingNumber: " << getMSCurManglingNumber() << '\n';
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  if (const DeclContext *DC = getEntity())
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    OS << "Entity : (clang::DeclContext*)" << DC << '\n';
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  if (NRVO.getInt())
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    OS << "NRVO not allowed\n";
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  else if (NRVO.getPointer())
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    OS << "NRVO candidate : (clang::VarDecl*)" << NRVO.getPointer() << '\n';
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}