Put the type feedback vector in the unoptimized JavaScript frame.

src/arm/macro-assembler-arm.h

Index: src/arm/macro-assembler-arm.h
diff --git a/src/arm/macro-assembler-arm.h b/src/arm/macro-assembler-arm.h
index 5de013e27071ddf343cf514dd329e85ec0fc7f2e..104f7eed723b768934fc927bd3f65c4c9fad6da8 100644
--- a/src/arm/macro-assembler-arm.h
+++ b/src/arm/macro-assembler-arm.h
@@ -1428,6 +1428,10 @@ class MacroAssembler: public Assembler {
   void JumpIfDictionaryInPrototypeChain(Register object, Register scratch0,
                                         Register scratch1, Label* found);
 
+  // OSR needs to adjust locals on the stack down one word over the vector.
+  void OSRDropVectorFromStack(int unoptimized_slot_count, Register scratch0,

[titzer, 2015/02/24 19:32:55]

I think this method should have a more generic name that suggests what it does.
In particular the name suggests that it only drops something from the stack,
while it in fact copies part of the stack.

Maybe "AdaptUnoptimizeFrameForOsrEntry"?

[mvstanton, 2015/03/20 12:21:09]

Good point, and good name. I've changed to AdaptUnoptimizedFrameForOsrEntry.

+                              Register scratch1);
+
  private:
   void CallCFunctionHelper(Register function,
                            int num_reg_arguments,