diff --git a/clang/lib/Sema/HLSLBuiltinTypeDeclBuilder.cpp b/clang/lib/Sema/HLSLBuiltinTypeDeclBuilder.cpp
index e5c6220bfb47d..87f9ae07550c2 100644
--- a/clang/lib/Sema/HLSLBuiltinTypeDeclBuilder.cpp
+++ b/clang/lib/Sema/HLSLBuiltinTypeDeclBuilder.cpp
@@ -697,7 +697,9 @@ BuiltinTypeDeclBuilder &BuiltinTypeDeclBuilder::addArraySubscriptOperators() {
       AST.DeclarationNames.getCXXOperatorName(OO_Subscript);
 
   addHandleAccessFunction(Subscript, /*IsConst=*/true, /*IsRef=*/true);
-  addHandleAccessFunction(Subscript, /*IsConst=*/false, /*IsRef=*/true);
+  if (getResourceAttrs().ResourceClass == llvm::dxil::ResourceClass::UAV)
+    addHandleAccessFunction(Subscript, /*IsConst=*/false, /*IsRef=*/true);
+
   return *this;
 }
 
@@ -714,7 +716,7 @@ BuiltinTypeDeclBuilder &BuiltinTypeDeclBuilder::addLoadMethods() {
   return *this;
 }
 
-FieldDecl *BuiltinTypeDeclBuilder::getResourceHandleField() {
+FieldDecl *BuiltinTypeDeclBuilder::getResourceHandleField() const {
   auto I = Fields.find("__handle");
   assert(I != Fields.end() &&
          I->second->getType()->isHLSLAttributedResourceType() &&
@@ -738,6 +740,12 @@ QualType BuiltinTypeDeclBuilder::getHandleElementType() {
   return SemaRef.getASTContext().Char8Ty;
 }
 
+HLSLAttributedResourceType::Attributes
+BuiltinTypeDeclBuilder::getResourceAttrs() const {
+  QualType HandleType = getResourceHandleField()->getType();
+  return cast<HLSLAttributedResourceType>(HandleType)->getAttrs();
+}
+
 // BuiltinTypeDeclBuilder &BuiltinTypeDeclBuilder::startDefinition() {
 //   assert(!Record->isCompleteDefinition() && "record is already complete");
 //   Record->startDefinition();
diff --git a/clang/lib/Sema/HLSLBuiltinTypeDeclBuilder.h b/clang/lib/Sema/HLSLBuiltinTypeDeclBuilder.h
index a52e2938104c7..36c4add20b225 100644
--- a/clang/lib/Sema/HLSLBuiltinTypeDeclBuilder.h
+++ b/clang/lib/Sema/HLSLBuiltinTypeDeclBuilder.h
@@ -91,10 +91,11 @@ class BuiltinTypeDeclBuilder {
   BuiltinTypeDeclBuilder &addConsumeMethod();
 
 private:
-  FieldDecl *getResourceHandleField();
+  FieldDecl *getResourceHandleField() const;
   QualType getFirstTemplateTypeParam();
   QualType getHandleElementType();
   Expr *getConstantIntExpr(int value);
+  HLSLAttributedResourceType::Attributes getResourceAttrs() const;
 };
 
 } // namespace hlsl
diff --git a/clang/test/AST/HLSL/StructuredBuffers-AST.hlsl b/clang/test/AST/HLSL/StructuredBuffers-AST.hlsl
index b74e183eec9cc..1c8b9c10f5a98 100644
--- a/clang/test/AST/HLSL/StructuredBuffers-AST.hlsl
+++ b/clang/test/AST/HLSL/StructuredBuffers-AST.hlsl
@@ -12,7 +12,7 @@
 //
 // RUN: %clang_cc1 -triple dxil-pc-shadermodel6.0-library -x hlsl -ast-dump \
 // RUN:   -DRESOURCE=RWStructuredBuffer %s | FileCheck -DRESOURCE=RWStructuredBuffer \
-// RUN:   -check-prefixes=CHECK,CHECK-UAV,CHECK-SUBSCRIPT,CHECK-COUNTER,CHECK-LOAD %s
+// RUN:   -check-prefixes=CHECK,CHECK-UAV,CHECK-SUBSCRIPT,CHECK-SUBSCRIPT-UAV,CHECK-COUNTER,CHECK-LOAD %s
 //
 // RUN: %clang_cc1 -triple dxil-pc-shadermodel6.0-library -x hlsl -ast-dump -DEMPTY \
 // RUN:  -DRESOURCE=AppendStructuredBuffer %s | FileCheck -DRESOURCE=AppendStructuredBuffer \
@@ -36,7 +36,7 @@
 //
 // RUN: %clang_cc1 -triple dxil-pc-shadermodel6.0-library -x hlsl -ast-dump \
 // RUN:   -DRESOURCE=RasterizerOrderedStructuredBuffer %s | FileCheck -DRESOURCE=RasterizerOrderedStructuredBuffer \
-// RUN:   -check-prefixes=CHECK,CHECK-UAV,CHECK-ROV,CHECK-SUBSCRIPT,CHECK-LOAD %s
+// RUN:   -check-prefixes=CHECK,CHECK-UAV,CHECK-ROV,CHECK-SUBSCRIPT,CHECK-SUBSCRIPT-UAV,CHECK-LOAD %s
 
 // This test tests two different AST generations for each structured buffer.
 // The "EMPTY" test mode verifies the AST generated by forward declaration
@@ -170,22 +170,22 @@ RESOURCE<float> Buffer;
 // CHECK-SUBSCRIPT-NEXT: DeclRefExpr {{.*}} 'unsigned int' ParmVar {{.*}} 'Index' 'unsigned int'
 // CHECK-SUBSCRIPT-NEXT: AlwaysInlineAttr {{.*}} Implicit always_inline
 
-// CHECK-SUBSCRIPT-NEXT: CXXMethodDecl {{.*}} operator[] 'hlsl_device element_type &(unsigned int)'
-// CHECK-SUBSCRIPT-NEXT: ParmVarDecl {{.*}} Index 'unsigned int'
-// CHECK-SUBSCRIPT-NEXT: CompoundStmt
-// CHECK-SUBSCRIPT-NEXT: ReturnStmt
-// CHECK-SUBSCRIPT-NEXT: UnaryOperator {{.*}} 'hlsl_device element_type' prefix '*' cannot overflow
-// CHECK-SUBSCRIPT-NEXT: CallExpr {{.*}} 'hlsl_device element_type *'
-// CHECK-SUBSCRIPT-NEXT: ImplicitCastExpr {{.*}} <BuiltinFnToFnPtr>
-// CHECK-SUBSCRIPT-NEXT: DeclRefExpr {{.*}} '<builtin fn type>' Function {{.*}} '__builtin_hlsl_resource_getpointer' 'void (...) noexcept'
-// CHECK-SUBSCRIPT-NEXT: MemberExpr {{.*}} '__hlsl_resource_t
-// CHECK-SUBSCRIPT-SAME{LITERAL}: [[hlsl::resource_class(
-// CHECK-SUBSCRIPT-SAME{LITERAL}: [[hlsl::raw_buffer]]
-// CHECK-SUBSCRIPT-SAME{LITERAL}: [[hlsl::contained_type(element_type)]]
-// CHECK-SUBSCRIPT-SAME: ' lvalue .__handle {{.*}}
-// CHECK-SUBSCRIPT-NEXT: CXXThisExpr {{.*}} '[[RESOURCE]]<element_type>' lvalue implicit this
-// CHECK-SUBSCRIPT-NEXT: DeclRefExpr {{.*}} 'unsigned int' ParmVar {{.*}} 'Index' 'unsigned int'
-// CHECK-SUBSCRIPT-NEXT: AlwaysInlineAttr {{.*}} Implicit always_inline
+// CHECK-SUBSCRIPT-UAV-NEXT: CXXMethodDecl {{.*}} operator[] 'hlsl_device element_type &(unsigned int)'
+// CHECK-SUBSCRIPT-UAV-NEXT: ParmVarDecl {{.*}} Index 'unsigned int'
+// CHECK-SUBSCRIPT-UAV-NEXT: CompoundStmt
+// CHECK-SUBSCRIPT-UAV-NEXT: ReturnStmt
+// CHECK-SUBSCRIPT-UAV-NEXT: UnaryOperator {{.*}} 'hlsl_device element_type' prefix '*' cannot overflow
+// CHECK-SUBSCRIPT-UAV-NEXT: CallExpr {{.*}} 'hlsl_device element_type *'
+// CHECK-SUBSCRIPT-UAV-NEXT: ImplicitCastExpr {{.*}} <BuiltinFnToFnPtr>
+// CHECK-SUBSCRIPT-UAV-NEXT: DeclRefExpr {{.*}} '<builtin fn type>' Function {{.*}} '__builtin_hlsl_resource_getpointer' 'void (...) noexcept'
+// CHECK-SUBSCRIPT-UAV-NEXT: MemberExpr {{.*}} '__hlsl_resource_t
+// CHECK-SUBSCRIPT-UAV-SAME{LITERAL}: [[hlsl::resource_class(
+// CHECK-SUBSCRIPT-UAV-SAME{LITERAL}: [[hlsl::raw_buffer]]
+// CHECK-SUBSCRIPT-UAV-SAME{LITERAL}: [[hlsl::contained_type(element_type)]]
+// CHECK-SUBSCRIPT-UAV-SAME: ' lvalue .__handle {{.*}}
+// CHECK-SUBSCRIPT-UAV-NEXT: CXXThisExpr {{.*}} '[[RESOURCE]]<element_type>' lvalue implicit this
+// CHECK-SUBSCRIPT-UAV-NEXT: DeclRefExpr {{.*}} 'unsigned int' ParmVar {{.*}} 'Index' 'unsigned int'
+// CHECK-SUBSCRIPT-UAV-NEXT: AlwaysInlineAttr {{.*}} Implicit always_inline
 
 // CHECK-NOSUBSCRIPT-NOT: CXXMethodDecl {{.*}} operator[] 'const hlsl_device element_type &(unsigned int) const'
 // CHECK-NOSUBSCRIPT-NOT: CXXMethodDecl {{.*}} operator[] 'hlsl_device element_type &(unsigned int)'
diff --git a/clang/test/AST/HLSL/TypedBuffers-AST.hlsl b/clang/test/AST/HLSL/TypedBuffers-AST.hlsl
index d098e5a323ca7..d6b88e276762e 100644
--- a/clang/test/AST/HLSL/TypedBuffers-AST.hlsl
+++ b/clang/test/AST/HLSL/TypedBuffers-AST.hlsl
@@ -126,7 +126,7 @@ RESOURCE<float> Buffer;
 // CHECK-NEXT: DeclRefExpr {{.*}} 'const char *' ParmVar {{.*}} 'name' 'const char *'
 // CHECK-NEXT: AlwaysInlineAttr
 
-// Subsctript operators
+// Subscript operators
 
 // CHECK: CXXMethodDecl {{.*}} operator[] 'const hlsl_device element_type &(unsigned int) const'
 // CHECK-NEXT: ParmVarDecl {{.*}} Index 'unsigned int'
@@ -145,22 +145,21 @@ RESOURCE<float> Buffer;
 // CHECK-NEXT: DeclRefExpr {{.*}} 'unsigned int' ParmVar {{.*}}  'Index' 'unsigned int'
 // CHECK-NEXT: AlwaysInlineAttr {{.*}} Implicit always_inline
 
-// CHECK-NEXT: CXXMethodDecl {{.*}} operator[] 'hlsl_device element_type &(unsigned int)'
-// CHECK-NEXT: ParmVarDecl {{.*}} Index 'unsigned int'
-// CHECK-NEXT: CompoundStmt
-// CHECK-NEXT: ReturnStmt
-// CHECK-NEXT: UnaryOperator {{.*}} 'hlsl_device element_type' prefix '*' cannot overflow
-// CHECK-NEXT: CallExpr {{.*}} 'hlsl_device element_type *'
-// CHECK-NEXT: ImplicitCastExpr {{.*}} <BuiltinFnToFnPtr>
-// CHECK-NEXT: DeclRefExpr {{.*}} '<builtin fn type>' Function {{.*}}  '__builtin_hlsl_resource_getpointer' 'void (...) noexcept'
-// CHECK-NEXT: MemberExpr {{.*}} '__hlsl_resource_t
+// CHECK-UAV-NEXT: CXXMethodDecl {{.*}} operator[] 'hlsl_device element_type &(unsigned int)'
+// CHECK-UAV-NEXT: ParmVarDecl {{.*}} Index 'unsigned int'
+// CHECK-UAV-NEXT: CompoundStmt
+// CHECK-UAV-NEXT: ReturnStmt
+// CHECK-UAV-NEXT: UnaryOperator {{.*}} 'hlsl_device element_type' prefix '*' cannot overflow
+// CHECK-UAV-NEXT: CallExpr {{.*}} 'hlsl_device element_type *'
+// CHECK-UAV-NEXT: ImplicitCastExpr {{.*}} <BuiltinFnToFnPtr>
+// CHECK-UAV-NEXT: DeclRefExpr {{.*}} '<builtin fn type>' Function {{.*}}  '__builtin_hlsl_resource_getpointer' 'void (...) noexcept'
+// CHECK-UAV-NEXT: MemberExpr {{.*}} '__hlsl_resource_t
 // CHECK-UAV-SAME{LITERAL}: [[hlsl::resource_class(UAV)]]
-// CHECK-SRV-SAME{LITERAL}: [[hlsl::resource_class(SRV)]]
-// CHECK-SAME{LITERAL}: [[hlsl::contained_type(element_type)]]
-// CHECK-SAME: ' lvalue .__handle {{.*}}
-// CHECK-NEXT: CXXThisExpr {{.*}} '[[RESOURCE]]<element_type>' lvalue implicit this
-// CHECK-NEXT: DeclRefExpr {{.*}} 'unsigned int' ParmVar {{.*}}  'Index' 'unsigned int'
-// CHECK-NEXT: AlwaysInlineAttr {{.*}} Implicit always_inline
+// CHECK-UAV-SAME{LITERAL}: [[hlsl::contained_type(element_type)]]
+// CHECK-UAV-SAME: ' lvalue .__handle {{.*}}
+// CHECK-UAV-NEXT: CXXThisExpr {{.*}} '[[RESOURCE]]<element_type>' lvalue implicit this
+// CHECK-UAV-NEXT: DeclRefExpr {{.*}} 'unsigned int' ParmVar {{.*}}  'Index' 'unsigned int'
+// CHECK-UAV-NEXT: AlwaysInlineAttr {{.*}} Implicit always_inline
 
 // Load method
 
diff --git a/clang/test/SemaHLSL/BuiltIns/Buffers.hlsl b/clang/test/SemaHLSL/BuiltIns/Buffers.hlsl
index 477a16a454a9c..d7c6876d3b9e3 100644
--- a/clang/test/SemaHLSL/BuiltIns/Buffers.hlsl
+++ b/clang/test/SemaHLSL/BuiltIns/Buffers.hlsl
@@ -111,4 +111,8 @@ Buffer<threeDoubles> BufferErr3;
 void main() {
   (void)Buff.__handle; // expected-error {{'__handle' is a private member of 'hlsl::Buffer<vector<float, 3>>'}}
   // expected-note@* {{implicitly declared private here}}
+
+  // expected-error@+2 {{cannot assign to return value because function 'operator[]' returns a const value}}
+  // expected-note@* {{function 'operator[]' which returns const-qualified type 'vector<float const hlsl_device &, 3>' declared here}}
+  Buff[0] = 0.0;
 }
diff --git a/clang/test/SemaHLSL/BuiltIns/StructuredBuffers.hlsl b/clang/test/SemaHLSL/BuiltIns/StructuredBuffers.hlsl
index bf541f4a07da7..fbd9288590adc 100644
--- a/clang/test/SemaHLSL/BuiltIns/StructuredBuffers.hlsl
+++ b/clang/test/SemaHLSL/BuiltIns/StructuredBuffers.hlsl
@@ -28,4 +28,8 @@ StructuredBuffer<Empty> BufferErr4;
 void main() {
   (void)Buff.__handle; // expected-error {{'__handle' is a private member of 'hlsl::StructuredBuffer<vector<float, 3>>'}}
   // expected-note@* {{implicitly declared private here}}
+
+  // expected-error@+2 {{cannot assign to return value because function 'operator[]' returns a const value}}
+  // expected-note@* {{function 'operator[]' which returns const-qualified type 'vector<float const hlsl_device &, 3>' declared here}}
+  Buff[0] = 0.0;
 }