Inlining of static calls with trivial function bodies.

runtime/vm/flow_graph.h

Index: runtime/vm/flow_graph.h
diff --git a/runtime/vm/flow_graph.h b/runtime/vm/flow_graph.h
index 3d7c51d12e2f90d7b0c58fd43ef695a2fe34d4cb..f1299a626686e22eb9bea6f9fb6b3ba8768af3ba 100644
--- a/runtime/vm/flow_graph.h
+++ b/runtime/vm/flow_graph.h
@@ -10,11 +10,15 @@
 
 namespace dart {
 
+class BindInstr;
 class BlockEntryInstr;
+class StaticCallComp;
 class Definition;
 class FlowGraphBuilder;
 class GraphEntryInstr;
 class PhiInstr;
+class ReturnInstr;
+class Value;
 
 // Class to incapsulate the construction and manipulation of the flow graph.
 class FlowGraph: public ZoneAllocated {
@@ -60,12 +64,20 @@ class FlowGraph: public ZoneAllocated {
     return graph_entry_;
   }
 
+  ZoneGrowableArray<ReturnInstr*>* exits() const { return exits_; }
+  void set_exits(ZoneGrowableArray<ReturnInstr*>* exits) { exits_ = exits; }
+
   intptr_t alloc_ssa_temp_index() { return current_ssa_temp_index_++; }
 
   // Operations on the flow graph.
   void ComputeSSA();
+  void ComputeSSAForInlining(intptr_t callers_max_virtual_register_number);

[Kevin Millikin (Google), 2012/08/29 14:01:04]

I'd call this something like 'next_virtual_register_number', pass it to
ComputeSSA, and get rid of the extra function.

[zerny-google, 2012/08/30 07:31:40]

Done.

   void ComputeUseLists();
 
+  void InlineCall(BindInstr* caller_instr,
+                  StaticCallComp* caller_comp,
+                  FlowGraph* callee_graph);
+
   // TODO(zerny): Once the SSA is feature complete this should be removed.
   void Bailout(const char* reason) const;
 
@@ -121,6 +133,7 @@ class FlowGraph: public ZoneAllocated {
   GrowableArray<BlockEntryInstr*> preorder_;
   GrowableArray<BlockEntryInstr*> postorder_;
   GrowableArray<BlockEntryInstr*> reverse_postorder_;
+  ZoneGrowableArray<ReturnInstr*>* exits_;
 };
 
 }  // namespace dart