PPC: Refine '[Interpreter] Fix deopt when accumulator needs to be materialized.'

src/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 1167 matching lines @@
   __ addi(ip, ip, Operand(Code::kHeaderSize - kHeapObjectTag));
   __ Jump(ip);
 }
 
 
 static void Generate_InterpreterNotifyDeoptimizedHelper(
     MacroAssembler* masm, Deoptimizer::BailoutType type) {
   // Enter an internal frame.
   {
     FrameAndConstantPoolScope scope(masm, StackFrame::INTERNAL);
-    // Save accumulator register and pass the deoptimization type to
-    // the runtime system.
+
+    // Pass the deoptimization type to the runtime system.
     __ LoadSmiLiteral(r4, Smi::FromInt(static_cast<int>(type)));
     __ Push(kInterpreterAccumulatorRegister, r4);
     __ CallRuntime(Runtime::kNotifyDeoptimized);
     __ pop(kInterpreterAccumulatorRegister);  // Restore accumulator register.
     // Tear down internal frame.
   }
 
   // Drop state (we don't use these for interpreter deopts).
   __ Drop(1);
 
@@ skipping 1547 matching lines @@
     __ bkpt(0);
   }
 }
 
 
 #undef __
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_PPC