[crankshaft] Fragmentation-free allocation folding.

src/macro-assembler.h

 // 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.
 
 #ifndef V8_MACRO_ASSEMBLER_H_
 #define V8_MACRO_ASSEMBLER_H_
 
 #include "src/assembler.h"
 
 
@@ skipping 13 matching lines @@
   // The content of the result register already contains the allocation top in
   // new space.
   RESULT_CONTAINS_TOP = 1 << 1,
   // Specify that the requested size of the space to allocate is specified in
   // words instead of bytes.
   SIZE_IN_WORDS = 1 << 2,
   // Align the allocation to a multiple of kDoubleSize
   DOUBLE_ALIGNMENT = 1 << 3,
   // Directly allocate in old space
   PRETENURE = 1 << 4,
+  // Allocation folding dominator
+  ALLOCATION_FOLDING_DOMINATOR = 1 << 5,
+  ALLOCATION_FOLDING_DOMINATED = 1 << 6
 };
 
-
 #if V8_TARGET_ARCH_IA32
 #include "src/ia32/assembler-ia32.h"
 #include "src/ia32/assembler-ia32-inl.h"
 #include "src/ia32/macro-assembler-ia32.h"
 #elif V8_TARGET_ARCH_X64
 #include "src/x64/assembler-x64.h"
 #include "src/x64/assembler-x64-inl.h"
 #include "src/x64/macro-assembler-x64.h"
 #elif V8_TARGET_ARCH_ARM64
 #include "src/arm64/assembler-arm64.h"
@@ skipping 233 matching lines @@
     }
     return ExternalReference::new_space_allocation_limit_address(isolate);
   }
 };
 
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_MACRO_ASSEMBLER_H_