[turbofan] Remove obsolete JSDebugger operator.

R=titzer@chromium.org

Review URL: https://codereview.chromium.org/1029583009

Cr-Commit-Position: refs/heads/master@{#27437}

src/compiler/ast-graph-builder.cc

@@ -1420,7 +1420,6 @@ void AstGraphBuilder::VisitTryFinallyStatement(TryFinallyStatement* stmt) {
 
 
 void AstGraphBuilder::VisitDebuggerStatement(DebuggerStatement* stmt) {
-  // TODO(turbofan): Do we really need a separate reloc-info for this?
   Node* node = NewNode(javascript()->CallRuntime(Runtime::kDebugBreak, 0));
   PrepareFrameState(node, stmt->DebugBreakId());
   environment()->MarkAllLocalsLive();

src/compiler/js-generic-lowering.cc

@@ -105,7 +105,6 @@ REPLACE_RUNTIME_CALL(JSCreateScriptContext, Runtime::kAbort)
 #define REPLACE_UNIMPLEMENTED(op) \
   void JSGenericLowering::Lower##op(Node* node) { UNIMPLEMENTED(); }
 REPLACE_UNIMPLEMENTED(JSYield)
-REPLACE_UNIMPLEMENTED(JSDebugger)
 #undef REPLACE_UNIMPLEMENTED
 
 

src/compiler/js-operator.cc

@@ -239,7 +239,6 @@ const StoreNamedParameters& StoreNamedParametersOf(const Operator* op) {
   V(HasProperty, Operator::kNoProperties, 2, 1)           \
   V(TypeOf, Operator::kPure, 1, 1)                        \
   V(InstanceOf, Operator::kNoProperties, 2, 1)            \
-  V(Debugger, Operator::kNoProperties, 0, 0)              \
   V(StackCheck, Operator::kNoProperties, 0, 0)            \
   V(CreateFunctionContext, Operator::kNoProperties, 1, 1) \
   V(CreateWithContext, Operator::kNoProperties, 2, 1)     \

src/compiler/js-operator.h

@@ -252,7 +252,6 @@ class JSOperatorBuilder FINAL : public ZoneObject {
 
   const Operator* TypeOf();
   const Operator* InstanceOf();
-  const Operator* Debugger();
 
   const Operator* StackCheck();
 

src/compiler/opcodes.h

@@ -132,7 +132,6 @@
   V(JSCallFunction)         \
   V(JSCallRuntime)          \
   V(JSYield)                \
-  V(JSDebugger)             \
   V(JSStackCheck)
 
 #define JS_OP_LIST(V)     \

src/compiler/typer.cc

@@ -1554,12 +1554,6 @@ Bounds Typer::Visitor::TypeJSCallRuntime(Node* node) {
 }
 
 
-Bounds Typer::Visitor::TypeJSDebugger(Node* node) {
-  UNREACHABLE();
-  return Bounds();
-}
-
-
 Bounds Typer::Visitor::TypeJSStackCheck(Node* node) {
   return Bounds::Unbounded(zone());
 }

src/compiler/verifier.cc

@@ -546,7 +546,6 @@ void Verifier::Visitor::Check(Node* node) {
     case IrOpcode::kJSCallFunction:
     case IrOpcode::kJSCallRuntime:
     case IrOpcode::kJSYield:
-    case IrOpcode::kJSDebugger:
       // Type can be anything.
       CheckUpperIs(node, Type::Any());
       break;

test/unittests/compiler/js-operator-unittest.cc

@@ -77,7 +77,6 @@ const SharedOperator kSharedOperators[] = {
     SHARED(HasProperty, Operator::kNoProperties, 2, 1, 1, 1, 1, 1, 2),
     SHARED(TypeOf, Operator::kPure, 1, 0, 0, 0, 1, 0, 0),
     SHARED(InstanceOf, Operator::kNoProperties, 2, 1, 1, 1, 1, 1, 2),
-    SHARED(Debugger, Operator::kNoProperties, 0, 0, 1, 1, 0, 1, 2),
     SHARED(CreateFunctionContext, Operator::kNoProperties, 1, 0, 1, 1, 1, 1, 2),
     SHARED(CreateWithContext, Operator::kNoProperties, 2, 1, 1, 1, 1, 1, 2),
     SHARED(CreateBlockContext, Operator::kNoProperties, 2, 0, 1, 1, 1, 1, 2),