Remove the ConstantArrayType subtypes.  This information is preserved in the
TypeLoc records for declarations;  it should not be necessary to represent it
directly in the type system.

Please complain if you were using these classes and feel you can't replicate
previous functionality using the TypeLoc API.



git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@84222 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/AST/ASTContext.cpp b/lib/AST/ASTContext.cpp
index e028186..507baea 100644
--- a/lib/AST/ASTContext.cpp
+++ b/lib/AST/ASTContext.cpp
@@ -571,8 +571,6 @@
     Align = getTypeAlign(cast<ArrayType>(T)->getElementType());
     break;
 
-  case Type::ConstantArrayWithExpr:
-  case Type::ConstantArrayWithoutExpr:
   case Type::ConstantArray: {
     const ConstantArrayType *CAT = cast<ConstantArrayType>(T);
 
@@ -1358,53 +1356,6 @@
   return QualType(New, 0);
 }
 
-/// getConstantArrayWithExprType - Return a reference to the type for
-/// an array of the specified element type.
-QualType
-ASTContext::getConstantArrayWithExprType(QualType EltTy,
-                                         const llvm::APInt &ArySizeIn,
-                                         Expr *ArySizeExpr,
-                                         ArrayType::ArraySizeModifier ASM,
-                                         unsigned EltTypeQuals,
-                                         SourceRange Brackets) {
-  // Convert the array size into a canonical width matching the pointer
-  // size for the target.
-  llvm::APInt ArySize(ArySizeIn);
-  ArySize.zextOrTrunc(Target.getPointerWidth(EltTy.getAddressSpace()));
-
-  // Compute the canonical ConstantArrayType.
-  QualType Canonical = getConstantArrayType(getCanonicalType(EltTy),
-                                            ArySize, ASM, EltTypeQuals);
-  // Since we don't unique expressions, it isn't possible to unique VLA's
-  // that have an expression provided for their size.
-  ConstantArrayWithExprType *New = new(*this, TypeAlignment)
-    ConstantArrayWithExprType(EltTy, Canonical, ArySize, ArySizeExpr,
-                              ASM, EltTypeQuals, Brackets);
-  Types.push_back(New);
-  return QualType(New, 0);
-}
-
-/// getConstantArrayWithoutExprType - Return a reference to the type for
-/// an array of the specified element type.
-QualType
-ASTContext::getConstantArrayWithoutExprType(QualType EltTy,
-                                            const llvm::APInt &ArySizeIn,
-                                            ArrayType::ArraySizeModifier ASM,
-                                            unsigned EltTypeQuals) {
-  // Convert the array size into a canonical width matching the pointer
-  // size for the target.
-  llvm::APInt ArySize(ArySizeIn);
-  ArySize.zextOrTrunc(Target.getPointerWidth(EltTy.getAddressSpace()));
-
-  // Compute the canonical ConstantArrayType.
-  QualType Canonical = getConstantArrayType(getCanonicalType(EltTy),
-                                            ArySize, ASM, EltTypeQuals);
-  ConstantArrayWithoutExprType *New = new(*this, TypeAlignment)
-    ConstantArrayWithoutExprType(EltTy, Canonical, ArySize, ASM, EltTypeQuals);
-  Types.push_back(New);
-  return QualType(New, 0);
-}
-
 /// getVariableArrayType - Returns a non-unique reference to the type for a
 /// variable array of the specified element type.
 QualType ASTContext::getVariableArrayType(QualType EltTy,
diff --git a/lib/AST/Type.cpp b/lib/AST/Type.cpp
index 0293862..bb9f57b 100644
--- a/lib/AST/Type.cpp
+++ b/lib/AST/Type.cpp
@@ -37,18 +37,6 @@
   C.Deallocate(this);
 }
 
-void ConstantArrayWithExprType::Destroy(ASTContext& C) {
-  // FIXME: destruction of SizeExpr commented out due to resource contention.
-  // SizeExpr->Destroy(C);
-  // See FIXME in SemaDecl.cpp:1536: if we were able to either steal
-  // or clone the SizeExpr there, then here we could freely delete it.
-  // Since we do not know how to steal or clone, we keep a pointer to
-  // a shared resource, but we cannot free it.
-  // (There probably is a trivial solution ... for people knowing clang!).
-  this->~ConstantArrayWithExprType();
-  C.Deallocate(this);
-}
-
 void VariableArrayType::Destroy(ASTContext& C) {
   if (SizeExpr)
     SizeExpr->Destroy(C);
@@ -177,8 +165,6 @@
   case Pointer:
   case VariableArray:
   case ConstantArray:
-  case ConstantArrayWithExpr:
-  case ConstantArrayWithoutExpr:
   case IncompleteArray:
   case FunctionProto:
   case FunctionNoProto:
@@ -1111,29 +1097,6 @@
   getElementType().getAsStringInternal(S, Policy);
 }
 
-void ConstantArrayWithExprType::getAsStringInternal(std::string &S, const PrintingPolicy &Policy) const {
-  if (Policy.ConstantArraySizeAsWritten) {
-    std::string SStr;
-    llvm::raw_string_ostream s(SStr);
-    getSizeExpr()->printPretty(s, 0, Policy);
-    S += '[';
-    S += s.str();
-    S += ']';
-    getElementType().getAsStringInternal(S, Policy);
-  }
-  else
-    ConstantArrayType::getAsStringInternal(S, Policy);
-}
-
-void ConstantArrayWithoutExprType::getAsStringInternal(std::string &S, const PrintingPolicy &Policy) const {
-  if (Policy.ConstantArraySizeAsWritten) {
-    S += "[]";
-    getElementType().getAsStringInternal(S, Policy);
-  }
-  else
-    ConstantArrayType::getAsStringInternal(S, Policy);
-}
-
 void IncompleteArrayType::getAsStringInternal(std::string &S, const PrintingPolicy &Policy) const {
   S += "[]";
 
diff --git a/lib/CodeGen/CGDebugInfo.cpp b/lib/CodeGen/CGDebugInfo.cpp
index 4c62420..0e7318c 100644
--- a/lib/CodeGen/CGDebugInfo.cpp
+++ b/lib/CodeGen/CGDebugInfo.cpp
@@ -846,8 +846,6 @@
                            Unit);
 
   case Type::ConstantArray:
-  case Type::ConstantArrayWithExpr:
-  case Type::ConstantArrayWithoutExpr:
   case Type::VariableArray:
   case Type::IncompleteArray:
     return CreateType(cast<ArrayType>(Ty), Unit);
diff --git a/lib/Frontend/PCHReader.cpp b/lib/Frontend/PCHReader.cpp
index e61668d..d9d3960 100644
--- a/lib/Frontend/PCHReader.cpp
+++ b/lib/Frontend/PCHReader.cpp
@@ -1839,30 +1839,6 @@
                                          ASM, IndexTypeQuals);
   }
 
-  case pch::TYPE_CONSTANT_ARRAY_WITH_EXPR: {
-    QualType ElementType = GetType(Record[0]);
-    ArrayType::ArraySizeModifier ASM = (ArrayType::ArraySizeModifier)Record[1];
-    unsigned IndexTypeQuals = Record[2];
-    SourceLocation LBLoc = SourceLocation::getFromRawEncoding(Record[3]);
-    SourceLocation RBLoc = SourceLocation::getFromRawEncoding(Record[4]);
-    unsigned Idx = 5;
-    llvm::APInt Size = ReadAPInt(Record, Idx);
-    return Context->getConstantArrayWithExprType(ElementType,
-                                                 Size, ReadTypeExpr(),
-                                                 ASM, IndexTypeQuals,
-                                                 SourceRange(LBLoc, RBLoc));
-  }
-
-  case pch::TYPE_CONSTANT_ARRAY_WITHOUT_EXPR: {
-    QualType ElementType = GetType(Record[0]);
-    ArrayType::ArraySizeModifier ASM = (ArrayType::ArraySizeModifier)Record[1];
-    unsigned IndexTypeQuals = Record[2];
-    unsigned Idx = 3;
-    llvm::APInt Size = ReadAPInt(Record, Idx);
-    return Context->getConstantArrayWithoutExprType(ElementType, Size,
-                                                    ASM, IndexTypeQuals);
-  }
-
   case pch::TYPE_INCOMPLETE_ARRAY: {
     QualType ElementType = GetType(Record[0]);
     ArrayType::ArraySizeModifier ASM = (ArrayType::ArraySizeModifier)Record[1];
diff --git a/lib/Frontend/PCHWriter.cpp b/lib/Frontend/PCHWriter.cpp
index 64a678e..5d5e09b 100644
--- a/lib/Frontend/PCHWriter.cpp
+++ b/lib/Frontend/PCHWriter.cpp
@@ -117,23 +117,6 @@
   Code = pch::TYPE_CONSTANT_ARRAY;
 }
 
-void PCHTypeWriter
-::VisitConstantArrayWithExprType(const ConstantArrayWithExprType *T) {
-  VisitArrayType(T);
-  Writer.AddSourceLocation(T->getLBracketLoc(), Record);
-  Writer.AddSourceLocation(T->getRBracketLoc(), Record);
-  Writer.AddAPInt(T->getSize(), Record);
-  Writer.AddStmt(T->getSizeExpr());
-  Code = pch::TYPE_CONSTANT_ARRAY_WITH_EXPR;
-}
-
-void PCHTypeWriter
-::VisitConstantArrayWithoutExprType(const ConstantArrayWithoutExprType *T) {
-  VisitArrayType(T);
-  Writer.AddAPInt(T->getSize(), Record);
-  Code = pch::TYPE_CONSTANT_ARRAY_WITHOUT_EXPR;
-}
-
 void PCHTypeWriter::VisitIncompleteArrayType(const IncompleteArrayType *T) {
   VisitArrayType(T);
   Code = pch::TYPE_INCOMPLETE_ARRAY;
diff --git a/lib/Sema/Sema.cpp b/lib/Sema/Sema.cpp
index ba05a07..9061576 100644
--- a/lib/Sema/Sema.cpp
+++ b/lib/Sema/Sema.cpp
@@ -361,9 +361,8 @@
       // Set the length of the array to 1 (C99 6.9.2p5).
       Diag(VD->getLocation(), diag::warn_tentative_incomplete_array);
       llvm::APInt One(Context.getTypeSize(Context.getSizeType()), true);
-      QualType T
-        = Context.getConstantArrayWithoutExprType(ArrayT->getElementType(),
-                                                  One, ArrayType::Normal, 0);
+      QualType T = Context.getConstantArrayType(ArrayT->getElementType(),
+                                                One, ArrayType::Normal, 0);
       VD->setType(T);
     } else if (RequireCompleteType(VD->getLocation(), VD->getType(),
                                    diag::err_tentative_def_incomplete_type))
diff --git a/lib/Sema/SemaDecl.cpp b/lib/Sema/SemaDecl.cpp
index 606b33f..fd96e95 100644
--- a/lib/Sema/SemaDecl.cpp
+++ b/lib/Sema/SemaDecl.cpp
@@ -1903,16 +1903,9 @@
 
   llvm::APSInt &Res = EvalResult.Val.getInt();
   if (Res >= llvm::APSInt(Res.getBitWidth(), Res.isUnsigned())) {
-    Expr* ArySizeExpr = VLATy->getSizeExpr();
-    // FIXME: here we could "steal" (how?) ArySizeExpr from the VLA,
-    // so as to transfer ownership to the ConstantArrayWithExpr.
-    // Alternatively, we could "clone" it (how?).
-    // Since we don't know how to do things above, we just use the
-    // very same Expr*.
-    return Context.getConstantArrayWithExprType(VLATy->getElementType(),
-                                                Res, ArySizeExpr,
-                                                ArrayType::Normal, 0,
-                                                VLATy->getBracketsRange());
+    // TODO: preserve the size expression in declarator info
+    return Context.getConstantArrayType(VLATy->getElementType(),
+                                        Res, ArrayType::Normal, 0);
   }
 
   SizeIsNegative = true;
diff --git a/lib/Sema/SemaInit.cpp b/lib/Sema/SemaInit.cpp
index 27f0896..4746a25 100644
--- a/lib/Sema/SemaInit.cpp
+++ b/lib/Sema/SemaInit.cpp
@@ -109,9 +109,9 @@
     llvm::APSInt ConstVal(32);
     ConstVal = StrLength;
     // Return a new array type (C99 6.7.8p22).
-    DeclT = S.Context.getConstantArrayWithoutExprType(IAT->getElementType(),
-                                                      ConstVal,
-                                                      ArrayType::Normal, 0);
+    DeclT = S.Context.getConstantArrayType(IAT->getElementType(),
+                                           ConstVal,
+                                           ArrayType::Normal, 0);
     return;
   }
 
diff --git a/lib/Sema/SemaType.cpp b/lib/Sema/SemaType.cpp
index 9603ca8..99b2a51 100644
--- a/lib/Sema/SemaType.cpp
+++ b/lib/Sema/SemaType.cpp
@@ -610,8 +610,7 @@
           << ArraySize->getSourceRange();
       }
     }
-    T = Context.getConstantArrayWithExprType(T, ConstVal, ArraySize,
-                                             ASM, Quals, Brackets);
+    T = Context.getConstantArrayType(T, ConstVal, ASM, Quals);
   }
   // If this is not C99, extwarn about VLA's and C99 array size modifiers.
   if (!getLangOptions().C99) {
diff --git a/lib/Sema/TreeTransform.h b/lib/Sema/TreeTransform.h
index ec5c667..a3c9fa5 100644
--- a/lib/Sema/TreeTransform.h
+++ b/lib/Sema/TreeTransform.h
@@ -340,29 +340,6 @@
                                     const llvm::APInt &Size,
                                     unsigned IndexTypeQuals);
 
-  /// \brief Build a new constant array type given the element type, size
-  /// modifier, (known) size of the array, size expression, and index type
-  /// qualifiers.
-  ///
-  /// By default, performs semantic analysis when building the array type.
-  /// Subclasses may override this routine to provide different behavior.
-  QualType RebuildConstantArrayWithExprType(QualType ElementType,
-                                            ArrayType::ArraySizeModifier SizeMod,
-                                            const llvm::APInt &Size,
-                                            Expr *SizeExpr,
-                                            unsigned IndexTypeQuals,
-                                            SourceRange BracketsRange);
-
-  /// \brief Build a new constant array type given the element type, size
-  /// modifier, (known) size of the array, and index type qualifiers.
-  ///
-  /// By default, performs semantic analysis when building the array type.
-  /// Subclasses may override this routine to provide different behavior.
-  QualType RebuildConstantArrayWithoutExprType(QualType ElementType,
-                                               ArrayType::ArraySizeModifier SizeMod,
-                                               const llvm::APInt &Size,
-                                               unsigned IndexTypeQuals);
-
   /// \brief Build a new incomplete array type given the element type, size
   /// modifier, and index type qualifiers.
   ///
@@ -2077,52 +2054,6 @@
 }
 
 template<typename Derived>
-QualType
-TreeTransform<Derived>::TransformConstantArrayWithExprType(
-                                      const ConstantArrayWithExprType *T) {
-  QualType ElementType = getDerived().TransformType(T->getElementType());
-  if (ElementType.isNull())
-    return QualType();
-
-  // Array bounds are not potentially evaluated contexts
-  EnterExpressionEvaluationContext Unevaluated(SemaRef, Action::Unevaluated);
-
-  Sema::OwningExprResult Size = getDerived().TransformExpr(T->getSizeExpr());
-  if (Size.isInvalid())
-    return QualType();
-
-  if (!getDerived().AlwaysRebuild() &&
-      ElementType == T->getElementType() &&
-      Size.get() == T->getSizeExpr())
-    return QualType(T, 0);
-
-  return getDerived().RebuildConstantArrayWithExprType(ElementType,
-                                                       T->getSizeModifier(),
-                                                       T->getSize(),
-                                                       Size.takeAs<Expr>(),
-                                               T->getIndexTypeCVRQualifiers(),
-                                                       T->getBracketsRange());
-}
-
-template<typename Derived>
-QualType
-TreeTransform<Derived>::TransformConstantArrayWithoutExprType(
-                                      const ConstantArrayWithoutExprType *T) {
-  QualType ElementType = getDerived().TransformType(T->getElementType());
-  if (ElementType.isNull())
-    return QualType();
-
-  if (!getDerived().AlwaysRebuild() &&
-      ElementType == T->getElementType())
-    return QualType(T, 0);
-
-  return getDerived().RebuildConstantArrayWithoutExprType(ElementType,
-                                                       T->getSizeModifier(),
-                                                       T->getSize(),
-                                             T->getIndexTypeCVRQualifiers());
-}
-
-template<typename Derived>
 QualType TreeTransform<Derived>::TransformIncompleteArrayType(
                                               const IncompleteArrayType *T) {
   QualType ElementType = getDerived().TransformType(T->getElementType());
@@ -4549,29 +4480,6 @@
 
 template<typename Derived>
 QualType
-TreeTransform<Derived>::RebuildConstantArrayWithExprType(QualType ElementType,
-                                          ArrayType::ArraySizeModifier SizeMod,
-                                                      const llvm::APInt &Size,
-                                                         Expr *SizeExpr,
-                                                      unsigned IndexTypeQuals,
-                                                    SourceRange BracketsRange) {
-  return getDerived().RebuildArrayType(ElementType, SizeMod, &Size, SizeExpr,
-                                       IndexTypeQuals, BracketsRange);
-}
-
-template<typename Derived>
-QualType
-TreeTransform<Derived>::RebuildConstantArrayWithoutExprType(
-                                                        QualType ElementType,
-                                          ArrayType::ArraySizeModifier SizeMod,
-                                                       const llvm::APInt &Size,
-                                                     unsigned IndexTypeQuals) {
-  return getDerived().RebuildArrayType(ElementType, SizeMod, &Size, 0,
-                                       IndexTypeQuals, SourceRange());
-}
-
-template<typename Derived>
-QualType
 TreeTransform<Derived>::RebuildIncompleteArrayType(QualType ElementType,
                                           ArrayType::ArraySizeModifier SizeMod,
                                                  unsigned IndexTypeQuals) {