MIPS: Refactor and improve inlined double-aligned allocations

src/mips/codegen-mips.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 187 matching lines @@
   __ Branch(&only_change_map, eq, at, Operand(t0));
 
   __ push(ra);
   __ lw(t1, FieldMemOperand(t0, FixedArray::kLengthOffset));
   // t0: source FixedArray
   // t1: number of elements (smi-tagged)
 
   // Allocate new FixedDoubleArray.
   __ sll(scratch, t1, 2);
   __ Addu(scratch, scratch, FixedDoubleArray::kHeaderSize);
-  __ Allocate(scratch, t2, t3, t5, &gc_required, NO_ALLOCATION_FLAGS);
+  __ Allocate(scratch, t2, t3, t5, &gc_required, DOUBLE_ALIGNMENT);
   // t2: destination FixedDoubleArray, not tagged as heap object
 
   // Set destination FixedDoubleArray's length and map.
   __ LoadRoot(t5, Heap::kFixedDoubleArrayMapRootIndex);
   __ sw(t1, MemOperand(t2, FixedDoubleArray::kLengthOffset));
   __ sw(t5, MemOperand(t2, HeapObject::kMapOffset));
   // Update receiver's map.
 
   __ sw(a3, FieldMemOperand(a2, HeapObject::kMapOffset));
   __ RecordWriteField(a2,
@@ skipping 440 matching lines @@
     patcher.masm()->dd(reinterpret_cast<uint32_t>(stub->instruction_start()));
   }
 }
 
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_MIPS