Implement inlined stack-check guards in TurboFan.

src/compiler/x64/code-generator-x64.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/compiler/code-generator-impl.h"
 #include "src/compiler/gap-resolver.h"
 #include "src/compiler/node-matchers.h"
 #include "src/compiler/node-properties-inl.h"
@@ skipping 215 matching lines @@
     }
     case kArchJmp:
       __ jmp(code_->GetLabel(i.InputBlock(0)));
       break;
     case kArchNop:
       // don't emit code for nops.
       break;
     case kArchRet:
       AssembleReturn();
       break;
+    case kArchStackPointer:
+      __ movq(i.OutputRegister(), rsp);
+      break;
     case kArchTruncateDoubleToI:
       __ TruncateDoubleToI(i.OutputRegister(), i.InputDoubleRegister(0));
       break;
     case kX64Add32:
       ASSEMBLE_BINOP(addl);
       break;
     case kX64Add:
       ASSEMBLE_BINOP(addq);
       break;
     case kX64Sub32:
@@ skipping 732 matching lines @@
     }
   }
   MarkLazyDeoptSite();
 }
 
 #undef __
 
 }  // namespace internal
 }  // namespace compiler
 }  // namespace v8