X87: [turbofan] Add an operator to access the parent frame pointer.

src/compiler/x87/code-generator-x87.cc

 // Copyright 2013 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.
 
 #include "src/compiler/code-generator.h"
 
 #include "src/ast/scopes.h"
 #include "src/compiler/code-generator-impl.h"
 #include "src/compiler/gap-resolver.h"
 #include "src/compiler/node-matchers.h"
@@ skipping 556 matching lines @@
     }
     case kArchRet:
       AssembleReturn();
       break;
     case kArchFramePointer:
       __ mov(i.OutputRegister(), ebp);
       break;
     case kArchStackPointer:
       __ mov(i.OutputRegister(), esp);
       break;
+    case kArchParentFramePointer:
+      if (frame_access_state()->frame()->needs_frame()) {
+        __ mov(i.OutputRegister(), Operand(ebp, 0));
+      } else {
+        __ mov(i.OutputRegister(), ebp);
+      }
+      break;
     case kArchTruncateDoubleToI: {
       if (!instr->InputAt(0)->IsDoubleRegister()) {
         __ fld_d(i.InputOperand(0));
       }
       __ TruncateX87TOSToI(i.OutputRegister());
       if (!instr->InputAt(0)->IsDoubleRegister()) {
         __ fstp(0);
       }
       break;
     }
@@ skipping 1647 matching lines @@
 void CodeGenerator::EnsureSpaceForLazyDeopt() {
   is_handler_entry_point = true;
   DoEnsureSpaceForLazyDeopt(info(), masm(), last_lazy_deopt_pc_);
 }
 
 #undef __
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8