Do not collect smi values with no ssa index for range analysis.

runtime/vm/flow_graph_optimizer.cc

Index: runtime/vm/flow_graph_optimizer.cc
diff --git a/runtime/vm/flow_graph_optimizer.cc b/runtime/vm/flow_graph_optimizer.cc
index c056e16c062c1edaa779d2e8e015af5832970177..19326527499c6b7b14c5b908fade1a467b3aba19 100644
--- a/runtime/vm/flow_graph_optimizer.cc
+++ b/runtime/vm/flow_graph_optimizer.cc
@@ -1303,7 +1303,10 @@ void RangeAnalysis::CollectSmiValues() {
       Instruction* current = instr_it.Current();
       Definition* defn = current->AsDefinition();
       if (defn != NULL) {
-        if (defn->GetPropagatedCid() == kSmiCid) smi_values_.Add(defn);
+        if ((defn->GetPropagatedCid() == kSmiCid) &&
+            (defn->ssa_temp_index() != -1)) {

[Florian Schneider, 2012/09/24 08:54:30]

ssa_temp_index != -1 should be equivalent to defn->is_used(). I'd rather use
that instead.

+          smi_values_.Add(defn);
+        }
       } else if (current->IsCheckSmi()) {
         smi_checks_.Add(current->AsCheckSmi());
       }