[turbofan] Generalize AllocateStub to allow old space allocation.

src/code-stubs.h

 // Copyright 2012 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.
 
 #ifndef V8_CODE_STUBS_H_
 #define V8_CODE_STUBS_H_
 
 #include "src/allocation.h"
 #include "src/assembler.h"
 #include "src/codegen.h"
@@ skipping 39 matching lines @@
   V(NonNumberToNumber)                      \
   V(StringToNumber)                         \
   V(ToString)                               \
   V(ToName)                                 \
   V(ToObject)                               \
   V(VectorStoreICTrampoline)                \
   V(VectorKeyedStoreICTrampoline)           \
   V(VectorStoreIC)                          \
   V(VectorKeyedStoreIC)                     \
   /* HydrogenCodeStubs */                   \
-  V(AllocateInNewSpace)                     \
+  V(Allocate)                               \
   V(ArrayNArgumentsConstructor)             \
   V(ArrayNoArgumentConstructor)             \
   V(ArraySingleArgumentConstructor)         \
   V(BinaryOpIC)                             \
   V(BinaryOpWithAllocationSite)             \
   V(CreateAllocationSite)                   \
   V(CreateWeakCell)                         \
   V(ElementsTransitionAndStore)             \
   V(FastArrayPush)                          \
   V(FastCloneRegExp)                        \
@@ skipping 2605 matching lines @@
     void InitializeDescriptor(CodeStubDescriptor* descriptor) override; \
     void GenerateAssembly(                                              \
         compiler::CodeStubAssembler* assembler) const override;         \
                                                                         \
     DEFINE_CALL_INTERFACE_DESCRIPTOR(Allocate##Type);                   \
     DEFINE_CODE_STUB(Allocate##Type, TurboFanCodeStub);                 \
   };
 SIMD128_TYPES(SIMD128_ALLOC_STUB)
 #undef SIMD128_ALLOC_STUB
 
-class AllocateInNewSpaceStub final : public HydrogenCodeStub {
+class AllocateStub final : public HydrogenCodeStub {
  public:
-  explicit AllocateInNewSpaceStub(Isolate* isolate)
-      : HydrogenCodeStub(isolate) {}
+  AllocateStub(Isolate* isolate, PretenureFlag pretenure_flag)
+      : HydrogenCodeStub(isolate) {
+    set_sub_minor_key(PretenureFlagBits::encode(pretenure_flag));
+  }
+
+  PretenureFlag pretenure_flag() const {
+    return PretenureFlagBits::decode(sub_minor_key());
+  }
 
  private:
-  DEFINE_CALL_INTERFACE_DESCRIPTOR(AllocateInNewSpace);
-  DEFINE_HYDROGEN_CODE_STUB(AllocateInNewSpace, HydrogenCodeStub);
+  typedef BitField<PretenureFlag, 0, 1> PretenureFlagBits;
+  DEFINE_CALL_INTERFACE_DESCRIPTOR(Allocate);
+  DEFINE_HYDROGEN_CODE_STUB(Allocate, HydrogenCodeStub);
 };
 
-
 class ArrayConstructorStubBase : public HydrogenCodeStub {
  public:
   ArrayConstructorStubBase(Isolate* isolate,
                            ElementsKind kind,
                            AllocationSiteOverrideMode override_mode)
       : HydrogenCodeStub(isolate) {
     // It only makes sense to override local allocation site behavior
     // if there is a difference between the global allocation site policy
     // for an ElementsKind and the desired usage of the stub.
     DCHECK(override_mode != DISABLE_ALLOCATION_SITES ||
@@ skipping 414 matching lines @@
 #undef DEFINE_HYDROGEN_CODE_STUB
 #undef DEFINE_CODE_STUB
 #undef DEFINE_CODE_STUB_BASE
 
 extern Representation RepresentationFromType(Type* type);
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_CODE_STUBS_H_