Import LLVM 10.0.0 release including clang, lld and lldb.

ok hackroom
tested by plenty

1 files changed, 200 insertions, 0 deletions

diff --git a/gnu/llvm/clang/lib/Sema/Scope.cpp b/gnu/llvm/clang/lib/Sema/Scope.cpp
new file mode 100644
index 00000000000..51b0b24e57b
--- /dev/null
+++ b/gnu/llvm/clang/lib/Sema/Scope.cpp
@@ -0,0 +1,200 @@
+//===- Scope.cpp - Lexical scope information --------------------*- 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
+//
+//===----------------------------------------------------------------------===//
+//
+// This file implements the Scope class, which is used for recording
+// information about a lexical scope.
+//
+//===----------------------------------------------------------------------===//
+
+#include "clang/Sema/Scope.h"
+#include "clang/AST/Decl.h"
+#include "llvm/Support/raw_ostream.h"
+
+using namespace clang;
+
+void Scope::setFlags(Scope *parent, unsigned flags) {
+  AnyParent = parent;
+  Flags = flags;
+
+  if (parent && !(flags & FnScope)) {
+    BreakParent    = parent->BreakParent;
+    ContinueParent = parent->ContinueParent;
+  } else {
+    // Control scopes do not contain the contents of nested function scopes for
+    // control flow purposes.
+    BreakParent = ContinueParent = nullptr;
+  }
+
+  if (parent) {
+    Depth = parent->Depth + 1;
+    PrototypeDepth = parent->PrototypeDepth;
+    PrototypeIndex = 0;
+    FnParent       = parent->FnParent;
+    BlockParent    = parent->BlockParent;
+    TemplateParamParent = parent->TemplateParamParent;
+    MSLastManglingParent = parent->MSLastManglingParent;
+    MSCurManglingNumber = getMSLastManglingNumber();
+    if ((Flags & (FnScope | ClassScope | BlockScope | TemplateParamScope |
+                  FunctionPrototypeScope | AtCatchScope | ObjCMethodScope)) ==
+        0)
+      Flags |= parent->getFlags() & OpenMPSimdDirectiveScope;
+  } else {
+    Depth = 0;
+    PrototypeDepth = 0;
+    PrototypeIndex = 0;
+    MSLastManglingParent = FnParent = BlockParent = nullptr;
+    TemplateParamParent = nullptr;
+    MSLastManglingNumber = 1;
+    MSCurManglingNumber = 1;
+  }
+
+  // If this scope is a function or contains breaks/continues, remember it.
+  if (flags & FnScope)            FnParent = this;
+  // The MS mangler uses the number of scopes that can hold declarations as
+  // part of an external name.
+  if (Flags & (ClassScope | FnScope)) {
+    MSLastManglingNumber = getMSLastManglingNumber();
+    MSLastManglingParent = this;
+    MSCurManglingNumber = 1;
+  }
+  if (flags & BreakScope)         BreakParent = this;
+  if (flags & ContinueScope)      ContinueParent = this;
+  if (flags & BlockScope)         BlockParent = this;
+  if (flags & TemplateParamScope) TemplateParamParent = this;
+
+  // If this is a prototype scope, record that.
+  if (flags & FunctionPrototypeScope) PrototypeDepth++;
+
+  if (flags & DeclScope) {
+    if (flags & FunctionPrototypeScope)
+      ; // Prototype scopes are uninteresting.
+    else if ((flags & ClassScope) && getParent()->isClassScope())
+      ; // Nested class scopes aren't ambiguous.
+    else if ((flags & ClassScope) && getParent()->getFlags() == DeclScope)
+      ; // Classes inside of namespaces aren't ambiguous.
+    else if ((flags & EnumScope))
+      ; // Don't increment for enum scopes.
+    else
+      incrementMSManglingNumber();
+  }
+}
+
+void Scope::Init(Scope *parent, unsigned flags) {
+  setFlags(parent, flags);
+
+  DeclsInScope.clear();
+  UsingDirectives.clear();
+  Entity = nullptr;
+  ErrorTrap.reset();
+  NRVO.setPointerAndInt(nullptr, 0);
+}
+
+bool Scope::containedInPrototypeScope() const {
+  const Scope *S = this;
+  while (S) {
+    if (S->isFunctionPrototypeScope())
+      return true;
+    S = S->getParent();
+  }
+  return false;
+}
+
+void Scope::AddFlags(unsigned FlagsToSet) {
+  assert((FlagsToSet & ~(BreakScope | ContinueScope)) == 0 &&
+         "Unsupported scope flags");
+  if (FlagsToSet & BreakScope) {
+    assert((Flags & BreakScope) == 0 && "Already set");
+    BreakParent = this;
+  }
+  if (FlagsToSet & ContinueScope) {
+    assert((Flags & ContinueScope) == 0 && "Already set");
+    ContinueParent = this;
+  }
+  Flags |= FlagsToSet;
+}
+
+void Scope::mergeNRVOIntoParent() {
+  if (VarDecl *Candidate = NRVO.getPointer()) {
+    if (isDeclScope(Candidate))
+      Candidate->setNRVOVariable(true);
+  }
+
+  if (getEntity())
+    return;
+
+  if (NRVO.getInt())
+    getParent()->setNoNRVO();
+  else if (NRVO.getPointer())
+    getParent()->addNRVOCandidate(NRVO.getPointer());
+}
+
+LLVM_DUMP_METHOD void Scope::dump() const { dumpImpl(llvm::errs()); }
+
+void Scope::dumpImpl(raw_ostream &OS) const {
+  unsigned Flags = getFlags();
+  bool HasFlags = Flags != 0;
+
+  if (HasFlags)
+    OS << "Flags: ";
+
+  std::pair<unsigned, const char *> FlagInfo[] = {
+      {FnScope, "FnScope"},
+      {BreakScope, "BreakScope"},
+      {ContinueScope, "ContinueScope"},
+      {DeclScope, "DeclScope"},
+      {ControlScope, "ControlScope"},
+      {ClassScope, "ClassScope"},
+      {BlockScope, "BlockScope"},
+      {TemplateParamScope, "TemplateParamScope"},
+      {FunctionPrototypeScope, "FunctionPrototypeScope"},
+      {FunctionDeclarationScope, "FunctionDeclarationScope"},
+      {AtCatchScope, "AtCatchScope"},
+      {ObjCMethodScope, "ObjCMethodScope"},
+      {SwitchScope, "SwitchScope"},
+      {TryScope, "TryScope"},
+      {FnTryCatchScope, "FnTryCatchScope"},
+      {OpenMPDirectiveScope, "OpenMPDirectiveScope"},
+      {OpenMPLoopDirectiveScope, "OpenMPLoopDirectiveScope"},
+      {OpenMPSimdDirectiveScope, "OpenMPSimdDirectiveScope"},
+      {EnumScope, "EnumScope"},
+      {SEHTryScope, "SEHTryScope"},
+      {SEHExceptScope, "SEHExceptScope"},
+      {SEHFilterScope, "SEHFilterScope"},
+      {CompoundStmtScope, "CompoundStmtScope"},
+      {ClassInheritanceScope, "ClassInheritanceScope"},
+      {CatchScope, "CatchScope"},
+  };
+
+  for (auto Info : FlagInfo) {
+    if (Flags & Info.first) {
+      OS << Info.second;
+      Flags &= ~Info.first;
+      if (Flags)
+        OS << " | ";
+    }
+  }
+
+  assert(Flags == 0 && "Unknown scope flags");
+
+  if (HasFlags)
+    OS << '\n';
+
+  if (const Scope *Parent = getParent())
+    OS << "Parent: (clang::Scope*)" << Parent << '\n';
+
+  OS << "Depth: " << Depth << '\n';
+  OS << "MSLastManglingNumber: " << getMSLastManglingNumber() << '\n';
+  OS << "MSCurManglingNumber: " << getMSCurManglingNumber() << '\n';
+  if (const DeclContext *DC = getEntity())
+    OS << "Entity : (clang::DeclContext*)" << DC << '\n';
+
+  if (NRVO.getInt())
+    OS << "NRVO not allowed\n";
+  else if (NRVO.getPointer())
+    OS << "NRVO candidate : (clang::VarDecl*)" << NRVO.getPointer() << '\n';
+}