Support for CONST_STRING in optimizing compiler.

Change-Id: Iab8517bdadd1d15ffbe570010f093660be7c51aa
diff --git a/compiler/optimizing/builder.cc b/compiler/optimizing/builder.cc
index e4ccd96..434d9ef 100644
--- a/compiler/optimizing/builder.cc
+++ b/compiler/optimizing/builder.cc
@@ -1173,6 +1173,18 @@
       break;
     }
 
+    case Instruction::CONST_STRING: {
+      current_block_->AddInstruction(new (arena_) HLoadString(instruction.VRegB_21c(), dex_offset));
+      UpdateLocal(instruction.VRegA_21c(), current_block_->GetLastInstruction());
+      break;
+    }
+
+    case Instruction::CONST_STRING_JUMBO: {
+      current_block_->AddInstruction(new (arena_) HLoadString(instruction.VRegB_31c(), dex_offset));
+      UpdateLocal(instruction.VRegA_31c(), current_block_->GetLastInstruction());
+      break;
+    }
+
     default:
       return false;
   }