[generators] Always call function with closure context when resuming.

src/builtins/ppc/builtins-ppc.cc

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #if V8_TARGET_ARCH_PPC
 
 #include "src/codegen.h"
 #include "src/debug/debug.h"
 #include "src/deoptimizer.h"
 #include "src/full-codegen/full-codegen.h"
@@ skipping 731 matching lines @@
   // Store input value into generator object.
   __ StoreP(r3, FieldMemOperand(r4, JSGeneratorObject::kInputOrDebugPosOffset),
             r0);
   __ RecordWriteField(r4, JSGeneratorObject::kInputOrDebugPosOffset, r3, r6,
                       kLRHasNotBeenSaved, kDontSaveFPRegs);
 
   // Store resume mode into generator object.
   __ StoreP(r5, FieldMemOperand(r4, JSGeneratorObject::kResumeModeOffset), r0);
 
   // Load suspended function and context.
-  __ LoadP(cp, FieldMemOperand(r4, JSGeneratorObject::kContextOffset));
   __ LoadP(r7, FieldMemOperand(r4, JSGeneratorObject::kFunctionOffset));
+  __ LoadP(cp, FieldMemOperand(r7, JSFunction::kContextOffset));
 
   // Flood function if we are stepping.
   Label prepare_step_in_if_stepping, prepare_step_in_suspended_generator;
   Label stepping_prepared;
   ExternalReference debug_hook =
       ExternalReference::debug_hook_on_function_call_address(masm->isolate());
   __ mov(ip, Operand(debug_hook));
   __ LoadByte(ip, MemOperand(ip), r0);
   __ extsb(ip, ip);
   __ CmpSmiLiteral(ip, Smi::kZero, r0);
@@ skipping 2200 matching lines @@
     __ CallRuntime(Runtime::kThrowStackOverflow);
     __ bkpt(0);
   }
 }
 
 #undef __
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_PPC