ARM: Merge data-processing instructions and shifts/(un)signed extensions

This commit mirrors the work that has already been done for ARM64.

Test: m test-art-target-run-test-551-checker-shifter-operand
Change-Id: Iec8c1563b035f40f0e18dcffde28d91dc21922f8
diff --git a/compiler/optimizing/instruction_simplifier_arm64.h b/compiler/optimizing/instruction_simplifier_arm64.h
index d4cb1f1..65654f5 100644
--- a/compiler/optimizing/instruction_simplifier_arm64.h
+++ b/compiler/optimizing/instruction_simplifier_arm64.h
@@ -40,11 +40,11 @@
                                   HInstruction* bitfield_op,
                                   bool do_merge);
   bool CanMergeIntoShifterOperand(HInstruction* use, HInstruction* bitfield_op) {
-    return TryMergeIntoShifterOperand(use, bitfield_op, false);
+    return TryMergeIntoShifterOperand(use, bitfield_op, /* do_merge */ false);
   }
   bool MergeIntoShifterOperand(HInstruction* use, HInstruction* bitfield_op) {
     DCHECK(CanMergeIntoShifterOperand(use, bitfield_op));
-    return TryMergeIntoShifterOperand(use, bitfield_op, true);
+    return TryMergeIntoShifterOperand(use, bitfield_op, /* do_merge */ true);
   }
 
   /**