Fix packed-element.js test on ARM with no snap

src/arm/macro-assembler-arm.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 2860 matching lines @@
   // Load the global or builtins object from the current context.
   ldr(scratch, MemOperand(cp, Context::SlotOffset(Context::GLOBAL_INDEX)));
   ldr(scratch, FieldMemOperand(scratch, GlobalObject::kGlobalContextOffset));
 
   // Check that the function's map is the same as the expected cached map.
   ldr(scratch,
       MemOperand(scratch,
                  Context::SlotOffset(Context::JS_ARRAY_MAPS_INDEX)));
   size_t offset = expected_kind * kPointerSize +
       FixedArrayBase::kHeaderSize;
-  cmp(map_in_out, scratch);
+  ldr(ip, FieldMemOperand(scratch, offset));
+  cmp(map_in_out, ip);
   b(ne, no_map_match);
 
   // Use the transitioned cached map.
   offset = transitioned_kind * kPointerSize +
       FixedArrayBase::kHeaderSize;
   ldr(map_in_out, FieldMemOperand(scratch, offset));

[Michael Starzinger, 2012/06/14 16:44:37]

These three lines can be turned into a simple mov(map_in_out, ip) now.

[Michael Starzinger, 2012/06/14 19:51:01]

Actually, what I said is complete nonsense, the offset is different. Disregard
my comment, sorry for the noise.

 }
 
 
 void MacroAssembler::LoadInitialArrayMap(
     Register function_in, Register scratch,
     Register map_out, bool can_have_holes) {
   ASSERT(!function_in.is(map_out));
   Label done;
   ldr(map_out, FieldMemOperand(function_in,
                                JSFunction::kPrototypeOrInitialMapOffset));
@@ skipping 889 matching lines @@
 void CodePatcher::EmitCondition(Condition cond) {
   Instr instr = Assembler::instr_at(masm_.pc_);
   instr = (instr & ~kCondMask) | cond;
   masm_.emit(instr);
 }
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_ARM