[turbofan] Reduce boilerplate around HeapNumber allocation in stubs.

src/builtins.cc

 // 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.
 
 #include "src/builtins.h"
 
 #include "src/api.h"
 #include "src/api-arguments.h"
 #include "src/api-natives.h"
 #include "src/base/once.h"
@@ skipping 2080 matching lines @@
         var_x.Bind(assembler->CallStub(callable, context, x));
         assembler->Goto(&loop);
       }
     }
   }
 
   assembler->Bind(&do_fsqrt);
   {
     Node* x = var_fsqrt_x.value();
     Node* value = assembler->Float64Sqrt(x);
-    Node* result = assembler->Allocate(HeapNumber::kSize,
-                                       compiler::CodeStubAssembler::kNone);
-    assembler->StoreMapNoWriteBarrier(result,
-                                      assembler->HeapNumberMapConstant());
-    assembler->StoreHeapNumberValue(result, value);
+    Node* result = assembler->AllocateHeapNumberWithValue(value);
     assembler->Return(result);
   }
 }
 
 // -----------------------------------------------------------------------------
 // ES6 section 26.1 The Reflect Object
 
 
 // ES6 section 26.1.3 Reflect.defineProperty
 BUILTIN(ReflectDefineProperty) {
@@ skipping 2508 matching lines @@
 BUILTIN_LIST_T(DEFINE_BUILTIN_ACCESSOR_T)
 BUILTIN_LIST_H(DEFINE_BUILTIN_ACCESSOR_H)
 BUILTIN_LIST_DEBUG_A(DEFINE_BUILTIN_ACCESSOR_A)
 #undef DEFINE_BUILTIN_ACCESSOR_C
 #undef DEFINE_BUILTIN_ACCESSOR_A
 #undef DEFINE_BUILTIN_ACCESSOR_T
 #undef DEFINE_BUILTIN_ACCESSOR_H
 
 }  // namespace internal
 }  // namespace v8