Add a Transform to SSA phase to the optimizing compiler.

Change-Id: Ia9700756a0396d797a00b529896487d52c989329
diff --git a/compiler/optimizing/code_generator.h b/compiler/optimizing/code_generator.h
index 5c7cac1..54f9e70 100644
--- a/compiler/optimizing/code_generator.h
+++ b/compiler/optimizing/code_generator.h
@@ -211,7 +211,7 @@
       : inputs(instruction->GetBlock()->GetGraph()->GetArena(), instruction->InputCount()),
         temps(instruction->GetBlock()->GetGraph()->GetArena(), 0) {
     inputs.SetSize(instruction->InputCount());
-    for (int i = 0; i < instruction->InputCount(); i++) {
+    for (size_t i = 0; i < instruction->InputCount(); i++) {
       inputs.Put(i, Location());
     }
   }