[interpreter] Add basic framework for bytecode handler code generation.

src/compiler/linkage.h

Index: src/compiler/linkage.h
diff --git a/src/compiler/linkage.h b/src/compiler/linkage.h
index 45d15c9eead52a5cdc709f20b4c19fc4261accbf..c8931f8726c274a4c5df087f14c768f90af672b2 100644
--- a/src/compiler/linkage.h
+++ b/src/compiler/linkage.h
@@ -241,8 +241,8 @@ class Linkage : public ZoneObject {
   // Creates a call descriptor for interpreter handler code stubs. These are not
   // intended to be called directly but are instead dispatched to by the
   // interpreter.
-  static CallDescriptor* GetInterpreterDispatchDescriptor(
-      Zone* zone, const MachineSignature* sig);
+  static CallDescriptor* GetInterpreterDispatchDescriptor(Zone* zone,
+                                                          bool needs_return);

[oth, 2015/07/15 13:22:01]

Suggest a comment on needs_return or a more indicative name (e.g.
function_returns_value).

[rmcilroy, 2015/07/15 16:55:58]

Added a comment and changed the name to will_return.

 
   // Get the location of an (incoming) parameter to this function.
   LinkageLocation GetParameterLocation(int index) const {