[SYCL] Revert "[OpenCL] Enable address spaces for references in C++"

Signed-off-by: Vladimir Lazarev <[email protected]>

Author: vladimirlaz

clang/include/clang/Sema/Sema.h

@@ -9774,10 +9774,6 @@ class Sema {
                                        AssignmentAction Action,
                                        CheckedConversionKind CCK);
 
-  ExprResult PerformQualificationConversion(
-      Expr *E, QualType Ty, ExprValueKind VK = VK_RValue,
-      CheckedConversionKind CCK = CCK_ImplicitConversion);
-
   /// the following "Check" methods will return a valid/converted QualType
   /// or a null QualType (indicating an error diagnostic was issued).
 

clang/lib/AST/Expr.cpp

@@ -1660,18 +1660,13 @@ bool CastExpr::CastConsistency() const {
     assert(getSubExpr()->getType()->isFunctionType());
     goto CheckNoBasePath;
 
-  case CK_AddressSpaceConversion: {
-    auto Ty = getType();
-    auto SETy = getSubExpr()->getType();
-    assert(getValueKindForType(Ty) == Expr::getValueKindForType(SETy));
-    if (!isGLValue())
-      Ty = Ty->getPointeeType();
-    if (!isGLValue())
-      SETy = SETy->getPointeeType();
-    assert(!Ty.isNull() && !SETy.isNull() &&
-           Ty.getAddressSpace() != SETy.getAddressSpace());
-    goto CheckNoBasePath;
-  }
+  case CK_AddressSpaceConversion:
+    assert(getType()->isPointerType() || getType()->isBlockPointerType());
+    assert(getSubExpr()->getType()->isPointerType() ||
+           getSubExpr()->getType()->isBlockPointerType());
+    assert(getType()->getPointeeType().getAddressSpace() !=
+           getSubExpr()->getType()->getPointeeType().getAddressSpace());
+    LLVM_FALLTHROUGH;
   // These should not have an inheritance path.
   case CK_Dynamic:
   case CK_ToUnion:

clang/lib/CodeGen/CGExpr.cpp

@@ -4168,6 +4168,7 @@ LValue CodeGenFunction::EmitCastLValue(const CastExpr *E) {
   case CK_ARCReclaimReturnedObject:
   case CK_ARCExtendBlockObject:
   case CK_CopyAndAutoreleaseBlockObject:
+  case CK_AddressSpaceConversion:
   case CK_IntToOCLSampler:
   case CK_FixedPointCast:
   case CK_FixedPointToBoolean:
@@ -4264,15 +4265,6 @@ LValue CodeGenFunction::EmitCastLValue(const CastExpr *E) {
     return MakeAddrLValue(V, E->getType(), LV.getBaseInfo(),
                           CGM.getTBAAInfoForSubobject(LV, E->getType()));
   }
-  case CK_AddressSpaceConversion: {
-    LValue LV = EmitLValue(E->getSubExpr());
-    QualType DestTy = getContext().getPointerType(E->getType());
-    llvm::Value *V = getTargetHooks().performAddrSpaceCast(
-        *this, LV.getPointer(), E->getSubExpr()->getType().getAddressSpace(),
-        E->getType().getAddressSpace(), ConvertType(DestTy));
-    return MakeAddrLValue(Address(V, LV.getAddress().getAlignment()),
-                          E->getType(), LV.getBaseInfo(), LV.getTBAAInfo());
-  }
   case CK_ObjCObjectLValueCast: {
     LValue LV = EmitLValue(E->getSubExpr());
     Address V = Builder.CreateElementBitCast(LV.getAddress(),

clang/lib/Sema/DeclSpec.cpp

@@ -566,16 +566,14 @@ bool DeclSpec::SetStorageClassSpec(Sema &S, SCS SC, SourceLocation Loc,
   // these storage-class specifiers.
   // OpenCL v1.2 s6.8 changes this to "The auto and register storage-class
   // specifiers are not supported."
-  // OpenCL C++ v1.0 s2.9 restricts register.
   if (S.getLangOpts().OpenCL &&
       !S.getOpenCLOptions().isEnabled("cl_clang_storage_class_specifiers")) {
     switch (SC) {
     case SCS_extern:
     case SCS_private_extern:
     case SCS_static:
-      if (S.getLangOpts().OpenCLVersion < 120 &&
-          !S.getLangOpts().OpenCLCPlusPlus) {
-        DiagID = diag::err_opencl_unknown_type_specifier;
+      if (S.getLangOpts().OpenCLVersion < 120) {
+        DiagID   = diag::err_opencl_unknown_type_specifier;
         PrevSpec = getSpecifierName(SC);
         return true;
       }

clang/lib/Sema/SemaDecl.cpp

@@ -7359,23 +7359,19 @@ void Sema::CheckVariableDeclarationType(VarDecl *NewVD) {
         return;
       }
     }
-    // OpenCL C v1.2 s6.5 - All program scope variables must be declared in the
+    // OpenCL v1.2 s6.5 - All program scope variables must be declared in the
     // __constant address space.
-    // OpenCL C v2.0 s6.5.1 - Variables defined at program scope and static
+    // OpenCL v2.0 s6.5.1 - Variables defined at program scope and static
     // variables inside a function can also be declared in the global
     // address space.
-    // OpenCL C++ v1.0 s2.5 inherits rule from OpenCL C v2.0 and allows local
-    // address space additionally.
-    // FIXME: Add local AS for OpenCL C++.
     if (NewVD->isFileVarDecl() || NewVD->isStaticLocal() ||
         NewVD->hasExternalStorage()) {
       if (!T->isSamplerT() &&
           !(T.getAddressSpace() == LangAS::opencl_constant ||
             (T.getAddressSpace() == LangAS::opencl_global &&
-             (getLangOpts().OpenCLVersion == 200 ||
-              getLangOpts().OpenCLCPlusPlus)))) {
+             getLangOpts().OpenCLVersion == 200))) {
         int Scope = NewVD->isStaticLocal() | NewVD->hasExternalStorage() << 1;
-        if (getLangOpts().OpenCLVersion == 200 || getLangOpts().OpenCLCPlusPlus)
+        if (getLangOpts().OpenCLVersion == 200)
           Diag(NewVD->getLocation(), diag::err_opencl_global_invalid_addr_space)
               << Scope << "global or constant";
         else

clang/lib/Sema/SemaExprCXX.cpp

@@ -4276,24 +4276,10 @@ Sema::PerformImplicitConversion(Expr *From, QualType ToType,
   case ICK_Qualification: {
     // The qualification keeps the category of the inner expression, unless the
     // target type isn't a reference.
-    ExprValueKind VK =
-        ToType->isReferenceType() ? From->getValueKind() : VK_RValue;
-
-    CastKind CK = CK_NoOp;
-
-    if (ToType->isReferenceType() &&
-        ToType->getPointeeType().getAddressSpace() !=
-            From->getType().getAddressSpace())
-      CK = CK_AddressSpaceConversion;
-
-    if (ToType->isPointerType() &&
-        ToType->getPointeeType().getAddressSpace() !=
-            From->getType()->getPointeeType().getAddressSpace())
-      CK = CK_AddressSpaceConversion;
-
-    From = ImpCastExprToType(From, ToType.getNonLValueExprType(Context), CK, VK,
-                             /*BasePath=*/nullptr, CCK)
-               .get();
+    ExprValueKind VK = ToType->isReferenceType() ?
+                                  From->getValueKind() : VK_RValue;
+    From = ImpCastExprToType(From, ToType.getNonLValueExprType(Context),
+                             CK_NoOp, VK, /*BasePath=*/nullptr, CCK).get();
 
     if (SCS.DeprecatedStringLiteralToCharPtr &&
         !getLangOpts().WritableStrings) {

clang/lib/Sema/SemaInit.cpp

@@ -7261,20 +7261,12 @@ ExprResult Sema::TemporaryMaterializationConversion(Expr *E) {
   return CreateMaterializeTemporaryExpr(E->getType(), E, false);
 }
 
-ExprResult Sema::PerformQualificationConversion(Expr *E, QualType Ty,
-                                                ExprValueKind VK,
-                                                CheckedConversionKind CCK) {
-  CastKind CK = (Ty.getAddressSpace() != E->getType().getAddressSpace())
-                    ? CK_AddressSpaceConversion
-                    : CK_NoOp;
-  return ImpCastExprToType(E, Ty, CK, VK, /*BasePath=*/nullptr, CCK);
-}
-
-ExprResult InitializationSequence::Perform(Sema &S,
-                                           const InitializedEntity &Entity,
-                                           const InitializationKind &Kind,
-                                           MultiExprArg Args,
-                                           QualType *ResultType) {
+ExprResult
+InitializationSequence::Perform(Sema &S,
+                                const InitializedEntity &Entity,
+                                const InitializationKind &Kind,
+                                MultiExprArg Args,
+                                QualType *ResultType) {
   if (Failed()) {
     Diagnose(S, Entity, Kind, Args);
     return ExprError();
@@ -7662,11 +7654,12 @@ ExprResult InitializationSequence::Perform(Sema &S,
     case SK_QualificationConversionRValue: {
       // Perform a qualification conversion; these can never go wrong.
       ExprValueKind VK =
-          Step->Kind == SK_QualificationConversionLValue
-              ? VK_LValue
-              : (Step->Kind == SK_QualificationConversionXValue ? VK_XValue
-                                                                : VK_RValue);
-      CurInit = S.PerformQualificationConversion(CurInit.get(), Step->Type, VK);
+          Step->Kind == SK_QualificationConversionLValue ?
+              VK_LValue :
+              (Step->Kind == SK_QualificationConversionXValue ?
+                   VK_XValue :
+                   VK_RValue);
+      CurInit = S.ImpCastExprToType(CurInit.get(), Step->Type, CK_NoOp, VK);
       break;
     }
 

clang/lib/Sema/SemaType.cpp

@@ -7255,8 +7255,7 @@ static void deduceOpenCLImplicitAddrSpace(TypeProcessingState &State,
   bool IsPointee =
       ChunkIndex > 0 &&
       (D.getTypeObject(ChunkIndex - 1).Kind == DeclaratorChunk::Pointer ||
-       D.getTypeObject(ChunkIndex - 1).Kind == DeclaratorChunk::BlockPointer ||
-       D.getTypeObject(ChunkIndex - 1).Kind == DeclaratorChunk::Reference);
+       D.getTypeObject(ChunkIndex - 1).Kind == DeclaratorChunk::BlockPointer);
   bool IsFuncReturnType =
       ChunkIndex > 0 &&
       D.getTypeObject(ChunkIndex - 1).Kind == DeclaratorChunk::Function;