[crankshaft] Fragmentation-free allocation folding.

src/x87/macro-assembler-x87.h

Index: src/x87/macro-assembler-x87.h
diff --git a/src/x87/macro-assembler-x87.h b/src/x87/macro-assembler-x87.h
index 2c180ff77ac050fac4762e1d55858ff23b890986..5d76d25a8a8ce80daf26fed78e6381d3b07f3f97 100644
--- a/src/x87/macro-assembler-x87.h
+++ b/src/x87/macro-assembler-x87.h
@@ -629,6 +629,11 @@ class MacroAssembler: public Assembler {
   void Allocate(Register object_size, Register result, Register result_end,
                 Register scratch, Label* gc_required, AllocationFlags flags);
 
+  void FastAllocate(int object_size, Register result, Register result_end,
+                    AllocationFlags flags);
+  void FastAllocate(Register object_size, Register result, Register result_end,
+                    AllocationFlags flags);
+
   // Allocate a heap number in new space with undefined value. The
   // register scratch2 can be passed as no_reg; the others must be
   // valid registers. Returns tagged pointer in result register, or