Implement inlined stack-check guards in TurboFan.

src/compiler/instruction-selector.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/instruction-selector.h"
 
 #include "src/compiler/instruction-selector-impl.h"
 #include "src/compiler/node-matchers.h"
 #include "src/compiler/node-properties-inl.h"
 #include "src/compiler/pipeline.h"
@@ skipping 594 matching lines @@
     case IrOpcode::kFloat64Mod:
       return MarkAsDouble(node), VisitFloat64Mod(node);
     case IrOpcode::kFloat64Sqrt:
       return MarkAsDouble(node), VisitFloat64Sqrt(node);
     case IrOpcode::kFloat64Equal:
       return VisitFloat64Equal(node);
     case IrOpcode::kFloat64LessThan:
       return VisitFloat64LessThan(node);
     case IrOpcode::kFloat64LessThanOrEqual:
       return VisitFloat64LessThanOrEqual(node);
+    case IrOpcode::kLoadStackPointer:
+      return VisitLoadStackPointer(node);
     default:
       V8_Fatal(__FILE__, __LINE__, "Unexpected operator #%d:%s @ node #%d",
                node->opcode(), node->op()->mnemonic(), node->id());
   }
 }
 
 
 #if V8_TURBOFAN_BACKEND
 
 void InstructionSelector::VisitWord32Equal(Node* node) {
@@ skipping 95 matching lines @@
   FlagsContinuation cont(kUnorderedLessThan, node);
   VisitFloat64Compare(node, &cont);
 }
 
 
 void InstructionSelector::VisitFloat64LessThanOrEqual(Node* node) {
   FlagsContinuation cont(kUnorderedLessThanOrEqual, node);
   VisitFloat64Compare(node, &cont);
 }
 
+
+void InstructionSelector::VisitLoadStackPointer(Node* node) {
+  OperandGenerator g(this);
+  Emit(kArchStackPointer, g.DefineAsRegister(node));
+}
+
 #endif  // V8_TURBOFAN_BACKEND
 
 // 32 bit targets do not implement the following instructions.
 #if V8_TARGET_ARCH_32_BIT && V8_TURBOFAN_BACKEND
 
 void InstructionSelector::VisitWord64And(Node* node) { UNIMPLEMENTED(); }
 
 
 void InstructionSelector::VisitWord64Or(Node* node) { UNIMPLEMENTED(); }
 
@@ skipping 369 matching lines @@
 
 
 void InstructionSelector::VisitCall(Node* call, BasicBlock* continuation,
                                     BasicBlock* deoptimization) {}
 
 #endif  // !V8_TURBOFAN_BACKEND
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8