[turbofan] Adds an Allocate macro to the CodeStubAssembler.

src/compiler/code-stub-assembler.h

 // Copyright 2015 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_COMPILER_CODE_STUB_ASSEMBLER_H_
 #define V8_COMPILER_CODE_STUB_ASSEMBLER_H_
 
 #include <map>
 
 // Clients of this interface shouldn't depend on lots of compiler internals.
@@ skipping 93 matching lines @@
     Node* value() const;
     MachineRepresentation rep() const;
     bool IsBound() const;
 
    private:
     friend class CodeStubAssembler;
     class Impl;
     Impl* impl_;
   };
 
+  enum AllocationFlag : uint8_t {
+    kNone = 0,
+    kDoubleAlignment = 1,
+    kPretenured = 1 << 1
+  };
+
+  typedef base::Flags<AllocationFlag> AllocationFlags;
+
   // ===========================================================================
   // Base Assembler
   // ===========================================================================
 
   // Constants.
   Node* Int32Constant(int value);
   Node* IntPtrConstant(intptr_t value);
   Node* NumberConstant(double value);
   Node* SmiConstant(Smi* value);
   Node* HeapConstant(Handle<HeapObject> object);
@@ skipping 110 matching lines @@
   // Load a field from an object on the heap.
   Node* LoadObjectField(Node* object, int offset);
   // Load the HeapNumber value from a HeapNumber object.
   Node* LoadHeapNumberValue(Node* object);
 
   // Load an array element from a FixedArray.
   Node* LoadFixedArrayElementSmiIndex(Node* object, Node* smi_index,
                                       int additional_offset = 0);
   Node* LoadFixedArrayElementConstantIndex(Node* object, int index);
 
+  // Allocate an object of the given size.
+  Node* Allocate(int size, AllocationFlags flags);
+
   // Store an array element to a FixedArray.
   Node* StoreFixedArrayElementNoWriteBarrier(Node* object, Node* index,
                                              Node* value);
   Node* LoadInstanceType(Node* object);
 
   // Returns a node that is true if the given bit is set in |word32|.
   template <typename T>
   Node* BitFieldDecode(Node* word32) {
     return BitFieldDecode(word32, T::kShift, T::kMask);
   }
@@ skipping 11 matching lines @@
   virtual void CallEpilogue();
 
  private:
   friend class CodeStubAssemblerTester;
 
   Node* CallN(CallDescriptor* descriptor, Node* code_target, Node** args);
   Node* TailCallN(CallDescriptor* descriptor, Node* code_target, Node** args);
 
   Node* SmiShiftBitsConstant();
 
+  Node* AllocateRawAligned(Node* size_in_bytes, AllocationFlags flags,
+                           Node* top_address, Node* limit_address);
+  Node* AllocateRawUnaligned(Node* size_in_bytes, AllocationFlags flags,
+                             Node* top_adddress, Node* limit_address);
+
   base::SmartPointer<RawMachineAssembler> raw_assembler_;
   Code::Flags flags_;
   const char* name_;
   bool code_generated_;
   ZoneVector<Variable::Impl*> variables_;
 
   DISALLOW_COPY_AND_ASSIGN(CodeStubAssembler);
 };
 
+DEFINE_OPERATORS_FOR_FLAGS(CodeStubAssembler::AllocationFlags);
+
 class CodeStubAssembler::Label {
  public:
   explicit Label(CodeStubAssembler* assembler);
   Label(CodeStubAssembler* assembler, int merged_variable_count,
         CodeStubAssembler::Variable** merged_variables);
   Label(CodeStubAssembler* assembler,
         CodeStubAssembler::Variable* merged_variable);
   ~Label() {}
 
  private:
@@ skipping 12 matching lines @@
   // Map of variables to the list of value nodes that have been added from each
   // merge path in their order of merging.
   std::map<Variable::Impl*, std::vector<Node*>> variable_merges_;
 };
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_CODE_STUB_ASSEMBLER_H_