[turbofan] Lower %_DebugIsActive intrinsic.

src/compiler/access-builder.cc

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/compiler/access-builder.h"
 
 #include "src/compiler/type-cache.h"
 #include "src/contexts.h"
 #include "src/frames.h"
 #include "src/handles-inl.h"
 #include "src/heap/heap.h"
 
 namespace v8 {
 namespace internal {
 namespace compiler {
 
 // static
 FieldAccess AccessBuilder::ForExternalDoubleValue() {
   FieldAccess access = {kUntaggedBase,          0,
                         MaybeHandle<Name>(),    Type::Number(),
                         MachineType::Float64(), kNoWriteBarrier};
   return access;
 }
 
 // static
+FieldAccess AccessBuilder::ForExternalUint8Value() {
+  FieldAccess access = {kUntaggedBase,        0,
+                        MaybeHandle<Name>(),  TypeCache::Get().kUint8,
+                        MachineType::Uint8(), kNoWriteBarrier};
+  return access;
+}
+
+// static
 FieldAccess AccessBuilder::ForMap() {
   FieldAccess access = {
       kTaggedBase,           HeapObject::kMapOffset,       MaybeHandle<Name>(),
       Type::OtherInternal(), MachineType::TaggedPointer(), kMapWriteBarrier};
   return access;
 }
 
 
 // static
 FieldAccess AccessBuilder::ForHeapNumberValue() {
@@ skipping 791 matching lines @@
   }
   UNREACHABLE();
   ElementAccess access = {kUntaggedBase, 0, Type::None(), MachineType::None(),
                           kNoWriteBarrier};
   return access;
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8