arrange to create prototypes for generators

src/arm/code-stubs-arm.cc

Index: src/arm/code-stubs-arm.cc
diff --git a/src/arm/code-stubs-arm.cc b/src/arm/code-stubs-arm.cc
index d982f27065788a1f25eed56cb99e6b3a3ff4bdaf..7f20cd0e502c0a847c8182fb5636f1586c1b4ea8 100644
--- a/src/arm/code-stubs-arm.cc
+++ b/src/arm/code-stubs-arm.cc
@@ -181,9 +181,13 @@ void FastNewClosureStub::Generate(MacroAssembler* masm) {
 
   __ IncrementCounter(counters->fast_new_closure_total(), 1, r6, r7);
 
-  int map_index = (language_mode_ == CLASSIC_MODE)
-      ? Context::FUNCTION_MAP_INDEX
-      : Context::STRICT_MODE_FUNCTION_MAP_INDEX;
+  int map_index = is_generator_

[rossberg, 2013/04/11 13:05:20]

Nit: it would be nice if this could be moved into some abstraction, since the
same logic is repeated at least 4 times (3 back-ends, and MapForNewFunction in
factory.cc).

[wingo, 2013/04/11 14:38:45]

Done.

+      ? ((language_mode_ == CLASSIC_MODE)
+         ? Context::GENERATOR_FUNCTION_MAP_INDEX
+         : Context::STRICT_MODE_GENERATOR_FUNCTION_MAP_INDEX)
+      : ((language_mode_ == CLASSIC_MODE)
+         ? Context::FUNCTION_MAP_INDEX
+         : Context::STRICT_MODE_FUNCTION_MAP_INDEX);
 
   // Compute the function map in the current native context and set that
   // as the map of the allocated object.