Add Uint32 representation

runtime/vm/compiler.cc

Index: runtime/vm/compiler.cc
diff --git a/runtime/vm/compiler.cc b/runtime/vm/compiler.cc
index 60a66aba9969e7fa3b68b3671c19774e6d2a5275..b7946e84e2a6c808135f9cf07fa9b2ea691ae8e0 100644
--- a/runtime/vm/compiler.cc
+++ b/runtime/vm/compiler.cc
@@ -453,6 +453,12 @@ static bool CompileParsedFunctionHelper(ParsedFunction* parsed_function,
           // making some phis smi.
           optimizer.InferIntRanges();
           DEBUG_ASSERT(flow_graph->VerifyUseLists());
+
+          // TODO(johnmccutchan): Do integer instruction selection after

[Florian Schneider, 2014/07/11 15:33:58]

Fine with me. But is there a problem that I don't see with that? 
Because this TODO really only involves moving this one line of code into
RangeAnalysis::Analyze, after InferRanges, before RemoveConstraints.

[Cutch, 2014/07/11 22:04:13]

No, it was me not understanding entirely what you were proposing. This is done
now.

+          // range analysis but before range constraints are removed.
+          // Select integer instructions based on range analysis result.
+          optimizer.SelectIntegerInstructions();
+          DEBUG_ASSERT(flow_graph->VerifyUseLists());
         }
 
         if (FLAG_constant_propagation) {