[turbofan] Introduce PretenureFlagOf helper function.

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/compiler/types.h"
@@ skipping 314 matching lines @@
          op->opcode() == IrOpcode::kSpeculativeNumberShiftRightLogical ||
          op->opcode() == IrOpcode::kSpeculativeNumberBitwiseAnd ||
          op->opcode() == IrOpcode::kSpeculativeNumberBitwiseOr ||
          op->opcode() == IrOpcode::kSpeculativeNumberBitwiseXor ||
          op->opcode() == IrOpcode::kSpeculativeNumberEqual ||
          op->opcode() == IrOpcode::kSpeculativeNumberLessThan ||
          op->opcode() == IrOpcode::kSpeculativeNumberLessThanOrEqual);
   return OpParameter<NumberOperationHint>(op);
 }
 
+PretenureFlag PretenureFlagOf(const Operator* op) {
+  DCHECK_EQ(IrOpcode::kAllocate, op->opcode());
+  return OpParameter<PretenureFlag>(op);
+}
+
 #define PURE_OP_LIST(V)                                          \
   V(BooleanNot, Operator::kNoProperties, 1, 0)                   \
   V(NumberEqual, Operator::kCommutative, 2, 0)                   \
   V(NumberLessThan, Operator::kNoProperties, 2, 0)               \
   V(NumberLessThanOrEqual, Operator::kNoProperties, 2, 0)        \
   V(NumberAdd, Operator::kCommutative, 2, 0)                     \
   V(NumberSubtract, Operator::kNoProperties, 2, 0)               \
   V(NumberMultiply, Operator::kCommutative, 2, 0)                \
   V(NumberDivide, Operator::kNoProperties, 2, 0)                 \
   V(NumberModulus, Operator::kNoProperties, 2, 0)                \
@@ skipping 460 matching lines @@
                         Operator::kNoDeopt | 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