ARM: Use ubfx and movw instructions to avoid a PC-relative load on

src/arm/ic-arm.cc

Index: src/arm/ic-arm.cc
===================================================================
--- src/arm/ic-arm.cc	(revision 10578)
+++ src/arm/ic-arm.cc	(working copy)
@@ -780,7 +780,12 @@
   // Load the elements into scratch1 and check its map.
   Handle<Map> arguments_map(heap->non_strict_arguments_elements_map());
   __ ldr(scratch1, FieldMemOperand(object, JSObject::kElementsOffset));
-  __ CheckMap(scratch1, scratch2, arguments_map, slow_case, DONT_DO_SMI_CHECK);
+  __ CheckMap(scratch1,
+              scratch2,
+              no_reg,
+              arguments_map,
+              slow_case,
+              DONT_DO_SMI_CHECK);
 
   // Check if element is in the range of mapped arguments. If not, jump
   // to the unmapped lookup with the parameter map in scratch1.
@@ -825,8 +830,7 @@
   const int kBackingStoreOffset = FixedArray::kHeaderSize + kPointerSize;
   Register backing_store = parameter_map;
   __ ldr(backing_store, FieldMemOperand(parameter_map, kBackingStoreOffset));
-  Handle<Map> fixed_array_map(masm->isolate()->heap()->fixed_array_map());
-  __ CheckMap(backing_store, scratch, fixed_array_map, slow_case,
+  __ CheckMap(backing_store, scratch, Heap::kFixedArrayMapRootIndex, slow_case,
               DONT_DO_SMI_CHECK);
   __ ldr(scratch, FieldMemOperand(backing_store, FixedArray::kLengthOffset));
   __ cmp(key, Operand(scratch));