Cardmarking writebarrier.

src/arm/full-codegen-arm.cc

 // Copyright 2009 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 899 matching lines @@
   __ b(ne, &fixed_array);
 
   // We got a map in register r0. Get the enumeration cache from it.
   __ ldr(r1, FieldMemOperand(r0, Map::kInstanceDescriptorsOffset));
   __ ldr(r1, FieldMemOperand(r1, DescriptorArray::kEnumerationIndexOffset));
   __ ldr(r2, FieldMemOperand(r1, DescriptorArray::kEnumCacheBridgeCacheOffset));
 
   // Setup the four remaining stack slots.
   __ push(r0);  // Map.
   __ ldr(r1, FieldMemOperand(r2, FixedArray::kLengthOffset));
-  __ mov(r1, Operand(r1, LSL, kSmiTagSize));
   __ mov(r0, Operand(Smi::FromInt(0)));
   // Push enumeration cache, enumeration cache length (as smi) and zero.
   __ Push(r2, r1, r0);
   __ jmp(&loop);
 
   // We got a fixed array in register r0. Iterate through that.
   __ bind(&fixed_array);
   __ mov(r1, Operand(Smi::FromInt(0)));  // Map (0) - force slow check.
   __ Push(r1, r0);
   __ ldr(r1, FieldMemOperand(r0, FixedArray::kLengthOffset));
-  __ mov(r1, Operand(r1, LSL, kSmiTagSize));
   __ mov(r0, Operand(Smi::FromInt(0)));
   __ Push(r1, r0);  // Fixed array length (as smi) and initial index.
 
   // Generate code for doing the condition check.
   __ bind(&loop);
   // Load the current count to r0, load the length to r1.
   __ Ldrd(r0, r1, MemOperand(sp, 0 * kPointerSize));
   __ cmp(r0, r1);  // Compare to the array length.
   __ b(hs, loop_statement.break_target());
 
@@ skipping 2193 matching lines @@
   __ mov(r1, Operand(r1, ASR, 1));  // Un-smi-tag value.
   __ add(pc, r1, Operand(masm_->CodeObject()));
 }
 
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_ARM