On MIPS, uses more branch delay slots.

runtime/vm/stub_code_arm.cc

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/globals.h"
 #if defined(TARGET_ARCH_ARM)
 
 #include "vm/assembler.h"
 #include "vm/code_generator.h"
 #include "vm/compiler.h"
@@ skipping 499 matching lines @@
     __ AddImmediate(R1, R0, Array::data_offset() - kHeapObjectTag);
     // R1: iterator which initially points to the start of the variable
     // data area to be initialized.
     __ LoadImmediate(IP, reinterpret_cast<intptr_t>(Object::null()));
     Label loop;
     __ Bind(&loop);
     // TODO(cshapiro): StoreIntoObjectNoBarrier
     __ cmp(R1, ShifterOperand(R7));
     __ str(IP, Address(R1, 0), CC);  // Store if unsigned lower.
     __ AddImmediate(R1, kWordSize, CC);
-    __ b(&loop, CS);
+    __ b(&loop, CC);  // Loop until R1 == R7.

[regis, 2013/05/01 01:21:46]

Thanks!

 
     // Done allocating and initializing the array.
     // R0: new object.
     // R2: array length as Smi (preserved for the caller.)
     __ Ret();
   }
 
   // Unable to allocate the array using the fast inline code, just call
   // into the runtime.
   __ Bind(&slow_case);
@@ skipping 1372 matching lines @@
   __ Bind(&reference_compare);
   __ cmp(left, ShifterOperand(right));
   __ Bind(&done);
   __ PopList((1 << R0) | (1 << R1) | (1 << R2));
   __ Ret();
 }
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_ARM