[turbofan] Add AllocateHeapNumberStub to avoid runtime call.

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 33 matching lines @@
   V(ProfileEntryHook)                       \
   V(RecordWrite)                            \
   V(RegExpExec)                             \
   V(StoreArrayLiteralElement)               \
   V(StoreBufferOverflow)                    \
   V(StoreElement)                           \
   V(StringCompare)                          \
   V(StubFailureTrampoline)                  \
   V(SubString)                              \
   /* HydrogenCodeStubs */                   \
+  V(AllocateHeapNumber)                     \
   V(ArrayNArgumentsConstructor)             \
   V(ArrayNoArgumentConstructor)             \
   V(ArraySingleArgumentConstructor)         \
   V(BinaryOpIC)                             \
   V(BinaryOpWithAllocationSite)             \
   V(CompareNilIC)                           \
   V(CreateAllocationSite)                   \
   V(ElementsTransitionAndStore)             \
   V(FastCloneShallowArray)                  \
   V(FastCloneShallowObject)                 \
@@ skipping 2042 matching lines @@
  private:
   class FromKindBits: public BitField<ElementsKind, 8, 8> {};
   class ToKindBits: public BitField<ElementsKind, 0, 8> {};
   class IsJSArrayBits: public BitField<bool, 16, 1> {};
 
   DEFINE_CALL_INTERFACE_DESCRIPTOR(TransitionElementsKind);
   DEFINE_HYDROGEN_CODE_STUB(TransitionElementsKind, HydrogenCodeStub);
 };
 
 
+class AllocateHeapNumberStub FINAL : public HydrogenCodeStub {
+ public:
+  explicit AllocateHeapNumberStub(Isolate* isolate)
+      : HydrogenCodeStub(isolate) {}
+
+ private:
+  DEFINE_CALL_INTERFACE_DESCRIPTOR(AllocateHeapNumber);
+  DEFINE_HYDROGEN_CODE_STUB(AllocateHeapNumber, 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 410 matching lines @@
 
 #undef DEFINE_CALL_INTERFACE_DESCRIPTOR
 #undef DEFINE_PLATFORM_CODE_STUB
 #undef DEFINE_HANDLER_CODE_STUB
 #undef DEFINE_HYDROGEN_CODE_STUB
 #undef DEFINE_CODE_STUB
 #undef DEFINE_CODE_STUB_BASE
 } }  // namespace v8::internal
 
 #endif  // V8_CODE_STUBS_H_