[turbofan] Add SimplifiedOperator::Allocate operator.

src/compiler/simplified-operator.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/compiler/simplified-operator.h"
 
 #include "src/base/lazy-instance.h"
 #include "src/compiler/opcodes.h"
 #include "src/compiler/operator.h"
 #include "src/types-inl.h"
@@ skipping 224 matching lines @@
 
 
 const Operator* SimplifiedOperatorBuilder::ReferenceEqual(Type* type) {
   // TODO(titzer): What about the type parameter?
   return new (zone()) Operator(IrOpcode::kReferenceEqual,
                                Operator::kCommutative | Operator::kPure,
                                "ReferenceEqual", 2, 0, 0, 1, 0, 0);
 }
 
 
+const Operator* SimplifiedOperatorBuilder::Allocate(PretenureFlag pretenure) {
+  return new (zone())
+      Operator1<PretenureFlag>(IrOpcode::kAllocate, Operator::kNoThrow,
+                               "Allocate", 1, 1, 1, 1, 1, 0, pretenure);
+}
+
+
 const Operator* SimplifiedOperatorBuilder::LoadBuffer(BufferAccess access) {
   switch (access.external_array_type()) {
 #define LOAD_BUFFER(Type, type, TYPE, ctype, size) \
   case kExternal##Type##Array:                     \
     return &cache_.kLoadBuffer##Type;
     TYPED_ARRAYS(LOAD_BUFFER)
 #undef LOAD_BUFFER
   }
   UNREACHABLE();
   return nullptr;
@@ skipping 27 matching lines @@
         Operator1<Type>(IrOpcode::k##Name, Operator::kNoThrow | properties,    \
                         #Name, value_input_count, 1, control_input_count,      \
                         output_count, 1, 0, access);                           \
   }
 ACCESS_OP_LIST(ACCESS)
 #undef ACCESS
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8