Break Crankshaft into phases.

src/lithium.h

Index: src/lithium.h
diff --git a/src/lithium.h b/src/lithium.h
index 686441e3834ebc375eb1e0781d69c45e81954b2a..183d50800ea4af292fe0530140850c32c77d7893 100644
--- a/src/lithium.h
+++ b/src/lithium.h
@@ -622,6 +622,7 @@ class DeepIterator BASE_EMBEDDED {
 };
 
 
+class LChunk;
 class LGap;
 class LLabel;
 
@@ -637,6 +638,8 @@ class LChunkBase: public ZoneObject {
       pointer_maps_(8, graph->zone()),
       inlined_closures_(1, graph->zone()) { }
 
+  static LChunk* NewChunk(HGraph* graph);
+
   void AddInstruction(LInstruction* instruction, HBasicBlock* block);
   LConstantOperand* DefineConstantOperand(HConstant* constant);
   HConstant* LookupConstant(LConstantOperand* operand) const;
@@ -670,6 +673,7 @@ class LChunkBase: public ZoneObject {
 
  protected:
   int spill_slot_count_;
+  static Handle<Code> Codegen(LChunk* chunk);

[danno, 2012/07/12 08:38:03]

Why do you need to make this static? If you make it an instance method, you
don't need the wrapper methods that call through in the subclasses.

[sanjoy, 2012/07/12 09:06:49]

As I mentioned, LCodeGen specifically needs an LChunk.

 
  private:
   CompilationInfo* info_;