Implement inlined stack-check guards in TurboFan.

src/compiler/arm/code-generator-arm.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.
 
 #include "src/compiler/code-generator.h"
 
 #include "src/arm/macro-assembler-arm.h"
 #include "src/compiler/code-generator-impl.h"
 #include "src/compiler/gap-resolver.h"
 #include "src/compiler/node-matchers.h"
@@ skipping 186 matching lines @@
       DCHECK_EQ(LeaveCC, i.OutputSBit());
       break;
     case kArchNop:
       // don't emit code for nops.
       DCHECK_EQ(LeaveCC, i.OutputSBit());
       break;
     case kArchRet:
       AssembleReturn();
       DCHECK_EQ(LeaveCC, i.OutputSBit());
       break;
+    case kArchStackPointer:
+      __ mov(i.OutputRegister(), sp);
+      DCHECK_EQ(LeaveCC, i.OutputSBit());
+      break;
     case kArchTruncateDoubleToI:
       __ TruncateDoubleToI(i.OutputRegister(), i.InputFloat64Register(0));
       DCHECK_EQ(LeaveCC, i.OutputSBit());
       break;
     case kArmAdd:
       __ add(i.OutputRegister(), i.InputRegister(0), i.InputOperand2(1),
              i.OutputSBit());
       break;
     case kArmAnd:
       __ and_(i.OutputRegister(), i.InputRegister(0), i.InputOperand2(1),
@@ skipping 698 matching lines @@
     }
   }
   MarkLazyDeoptSite();
 }
 
 #undef __
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8