Support for multiple register values

runtime/vm/flow_graph_type_propagator.cc

Index: runtime/vm/flow_graph_type_propagator.cc
diff --git a/runtime/vm/flow_graph_type_propagator.cc b/runtime/vm/flow_graph_type_propagator.cc
index e83951c28cfc82f5d0bbaa881f51917dd83c10b9..2134ae6b2df1692b3847d36dc6be87419a15f26a 100644
--- a/runtime/vm/flow_graph_type_propagator.cc
+++ b/runtime/vm/flow_graph_type_propagator.cc
@@ -1302,4 +1302,20 @@ CompileType MergedMathInstr::ComputeType() const {
   }
 }
 
+
+CompileType MergedMath2Instr::ComputeType() const {
+  return CompileType::Dynamic();
+}
+
+
+CompileType ExtractNthOutputInstr::ComputeType() const {
+  if (representation() == kUnboxedDouble) {
+    return CompileType::FromCid(kDoubleCid);
+  } else {
+    ASSERT(representation() == kTagged);
+    return CompileType::FromCid(kSmiCid);

[Florian Schneider, 2014/04/04 11:52:46]

This relies on the the instruction where the output is extracted from, so I
don't think the smi-type should be hard-coded here.

[Cutch, 2014/04/04 16:34:46]

Done.

+  }
+}
+
+
 }  // namespace dart