[turbofan] Drop the obsolete TypeGuard operator.

src/compiler/js-intrinsic-lowering.cc

 // Copyright 2015 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/js-intrinsic-lowering.h"
 
 #include <stack>
 
 #include "src/code-factory.h"
 #include "src/compiler/access-builder.h"
@@ skipping 16 matching lines @@
 Reduction JSIntrinsicLowering::Reduce(Node* node) {
   if (node->opcode() != IrOpcode::kJSCallRuntime) return NoChange();
   const Runtime::Function* const f =
       Runtime::FunctionForId(CallRuntimeParametersOf(node->op()).id());
   if (f->intrinsic_type != Runtime::IntrinsicType::INLINE) return NoChange();
   switch (f->function_id) {
     case Runtime::kInlineCreateIterResultObject:
       return ReduceCreateIterResultObject(node);
     case Runtime::kInlineDeoptimizeNow:
       return ReduceDeoptimizeNow(node);
-    case Runtime::kInlineDoubleHi:
-      return ReduceDoubleHi(node);
-    case Runtime::kInlineDoubleLo:
-      return ReduceDoubleLo(node);
     case Runtime::kInlineGeneratorClose:
       return ReduceGeneratorClose(node);
     case Runtime::kInlineGeneratorGetInputOrDebugPos:
       return ReduceGeneratorGetInputOrDebugPos(node);
     case Runtime::kInlineGeneratorGetResumeMode:
       return ReduceGeneratorGetResumeMode(node);
     case Runtime::kInlineIsArray:
       return ReduceIsInstanceType(node, JS_ARRAY_TYPE);
     case Runtime::kInlineIsTypedArray:
       return ReduceIsInstanceType(node, JS_TYPED_ARRAY_TYPE);
@@ skipping 67 matching lines @@
       graph()->NewNode(common()->Deoptimize(DeoptimizeKind::kEager),
                        frame_state, effect, control);
   NodeProperties::MergeControlToEnd(graph(), common(), deoptimize);
   Revisit(graph()->end());
 
   node->TrimInputCount(0);
   NodeProperties::ChangeOp(node, common()->Dead());
   return Changed(node);
 }
 
-
-Reduction JSIntrinsicLowering::ReduceDoubleHi(Node* node) {
-  // Tell the compiler to assume number input.
-  Node* renamed = graph()->NewNode(simplified()->TypeGuard(Type::Number()),
-                                   node->InputAt(0), graph()->start());
-  node->ReplaceInput(0, renamed);
-  return Change(node, machine()->Float64ExtractHighWord32());
-}
-
-
-Reduction JSIntrinsicLowering::ReduceDoubleLo(Node* node) {
-  // Tell the compiler to assume number input.
-  Node* renamed = graph()->NewNode(simplified()->TypeGuard(Type::Number()),
-                                   node->InputAt(0), graph()->start());
-  node->ReplaceInput(0, renamed);
-  return Change(node, machine()->Float64ExtractLowWord32());
-}
-
 Reduction JSIntrinsicLowering::ReduceGeneratorClose(Node* node) {
   Node* const generator = NodeProperties::GetValueInput(node, 0);
   Node* const effect = NodeProperties::GetEffectInput(node);
   Node* const control = NodeProperties::GetControlInput(node);
   Node* const closed = jsgraph()->Constant(JSGeneratorObject::kGeneratorClosed);
   Node* const undefined = jsgraph()->UndefinedConstant();
   Operator const* const op = simplified()->StoreField(
       AccessBuilder::ForJSGeneratorObjectContinuation());
 
   ReplaceWithValue(node, undefined, node);
@@ skipping 345 matching lines @@
 }
 
 
 SimplifiedOperatorBuilder* JSIntrinsicLowering::simplified() const {
   return jsgraph()->simplified();
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8