MIPS: Force context allocation for variables in generator scopes.

src/mips/full-codegen-mips.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 152 matching lines @@
     __ LoadRoot(a2, Heap::kUndefinedValueRootIndex);
     __ sw(a2, MemOperand(sp, receiver_offset));
     __ bind(&ok);
   }
 
   // Open a frame scope to indicate that there is a frame on the stack.  The
   // MANUAL indicates that the scope shouldn't actually generate code to set up
   // the frame (that is done below).
   FrameScope frame_scope(masm_, StackFrame::MANUAL);
 
-  int locals_count = info->scope()->num_stack_slots();
-
   info->set_prologue_offset(masm_->pc_offset());
   // The following three instructions must remain together and unmodified for
   // code aging to work properly.
   __ Push(ra, fp, cp, a1);
   // Load undefined value here, so the value is ready for the loop
   // below.
   __ LoadRoot(at, Heap::kUndefinedValueRootIndex);
   // Adjust fp to point to caller's fp.
   __ Addu(fp, sp, Operand(2 * kPointerSize));
 
   { Comment cmnt(masm_, "[ Allocate locals");
+    int locals_count = info->scope()->num_stack_slots();
+    // Generators allocate locals, if any, in context slots.
+    ASSERT(!info->function()->is_generator() || locals_count == 0);
     for (int i = 0; i < locals_count; i++) {
       __ push(at);
     }
   }
 
   bool function_in_register = true;
 
   // Possibly allocate a local context.
   int heap_slots = info->scope()->num_heap_slots() - Context::MIN_CONTEXT_SLOTS;
   if (heap_slots > 0) {
@@ skipping 4406 matching lines @@
   *context_length = 0;
   return previous_;
 }
 
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_MIPS