[crankshaft] Fragmentation-free allocation folding.

src/mips64/macro-assembler-mips64.h

Index: src/mips64/macro-assembler-mips64.h
diff --git a/src/mips64/macro-assembler-mips64.h b/src/mips64/macro-assembler-mips64.h
index 7aa4a51488339a125e15ef26123755b3bffa2521..27a34b32bfa12f6a9110214ffdee5a86b6ff8459 100644
--- a/src/mips64/macro-assembler-mips64.h
+++ b/src/mips64/macro-assembler-mips64.h
@@ -587,6 +587,15 @@ class MacroAssembler: public Assembler {
   void Allocate(Register object_size, Register result, Register result_end,
                 Register scratch, Label* gc_required, AllocationFlags flags);
 
+  // FastAllocate is right now only used for folded allocations. It just
+  // increments the top pointer without checking against limit. This can only
+  // be done if it was proved earlier that the allocation will succeed.
+  void FastAllocate(int object_size, Register result, Register scratch1,
+                    Register scratch2, AllocationFlags flags);
+
+  void FastAllocate(Register object_size, Register result, Register result_new,
+                    Register scratch, AllocationFlags flags);
+
   void AllocateTwoByteString(Register result,
                              Register length,
                              Register scratch1,