Add a Transform to SSA phase to the optimizing compiler.

Change-Id: Ia9700756a0396d797a00b529896487d52c989329
diff --git a/compiler/optimizing/code_generator.cc b/compiler/optimizing/code_generator.cc
index 7e63c69..babb1f5 100644
--- a/compiler/optimizing/code_generator.cc
+++ b/compiler/optimizing/code_generator.cc
@@ -47,7 +47,7 @@
   Bind(GetLabelOf(block));
   HGraphVisitor* location_builder = GetLocationBuilder();
   HGraphVisitor* instruction_visitor = GetInstructionVisitor();
-  for (HInstructionIterator it(block); !it.Done(); it.Advance()) {
+  for (HInstructionIterator it(*block->GetInstructions()); !it.Done(); it.Advance()) {
     HInstruction* current = it.Current();
     current->Accept(location_builder);
     InitLocations(current);
@@ -57,7 +57,7 @@
 
 void CodeGenerator::InitLocations(HInstruction* instruction) {
   if (instruction->GetLocations() == nullptr) return;
-  for (int i = 0; i < instruction->InputCount(); i++) {
+  for (size_t i = 0; i < instruction->InputCount(); i++) {
     Location location = instruction->GetLocations()->InAt(i);
     if (location.IsValid()) {
       // Move the input to the desired location.