[turbofan] Adds an Allocate macro to the CodeStubAssembler.

src/compiler/code-stub-assembler.h

Index: src/compiler/code-stub-assembler.h
diff --git a/src/compiler/code-stub-assembler.h b/src/compiler/code-stub-assembler.h
index 2ab13764c46acdb4e67bcc78cf9306d832e57e30..c50f2e5565ea7f1835cef139c0aa798a14c015c4 100644
--- a/src/compiler/code-stub-assembler.h
+++ b/src/compiler/code-stub-assembler.h
@@ -68,6 +68,27 @@ class Schedule;
   V(Word64Ror)                                \
   V(UintPtrGreaterThanOrEqual)
 
+enum AllocationFlags : uint8_t {

[Benedikt Meurer, 2016/02/25 13:00:40]

Can you move this into the CodeStubAssembler?

[epertoso, 2016/02/25 13:26:54]

Done.

+  kNone = 0,
+  kTagObject = 1,

[Benedikt Meurer, 2016/02/25 13:00:41]

Don't add kTagObject here. This is terrible in the MacroAssembler (easy to mess
up). Allocate* will always produce tagged pointers.

[epertoso, 2016/02/25 13:26:54]

OK.

+  kDoubleAlignment = 1 << 1,
+  kPretenured = 1 << 2
+};
+
+inline AllocationFlags operator|(AllocationFlags lhs, AllocationFlags rhs) {

[Benedikt Meurer, 2016/02/25 13:00:40]

Use base::Flags and DEFINE_OPERATORS_FOR_FLAGS here.

[epertoso, 2016/02/25 13:26:53]

Done.

+  return static_cast<AllocationFlags>(static_cast<uint8_t>(lhs) |
+                                      static_cast<uint8_t>(rhs));
+}
+
+inline AllocationFlags operator&(AllocationFlags lhs, AllocationFlags rhs) {
+  return static_cast<AllocationFlags>(static_cast<uint8_t>(lhs) &
+                                      static_cast<uint8_t>(rhs));
+}
+
+inline AllocationFlags operator~(AllocationFlags arg) {
+  return static_cast<AllocationFlags>(~static_cast<uint8_t>(arg));
+}
+
 class CodeStubAssembler {
  public:
   // |result_size| specifies the number of results returned by the stub.
@@ -211,6 +232,9 @@ class CodeStubAssembler {
                                       int additional_offset = 0);
   Node* LoadFixedArrayElementConstantIndex(Node* object, int index);
 
+  // Allocate in new space.
+  Node* Allocate(int size, AllocationFlags flags);
+
  protected:
   // Protected helpers which delegate to RawMachineAssembler.
   Graph* graph();
@@ -229,6 +253,11 @@ class CodeStubAssembler {
 
   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_;