Revert of [turbofan] Osr value typing + dynamic type checks on entry.

src/compiler/common-operator.h

 // 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.
 
 #ifndef V8_COMPILER_COMMON_OPERATOR_H_
 #define V8_COMPILER_COMMON_OPERATOR_H_
 
 #include "src/assembler.h"
 #include "src/compiler/frame-states.h"
 #include "src/deoptimize-reason.h"
@@ skipping 153 matching lines @@
 
 std::ostream& operator<<(std::ostream&, RegionObservability);
 
 RegionObservability RegionObservabilityOf(Operator const*) WARN_UNUSED_RESULT;
 
 std::ostream& operator<<(std::ostream& os,
                          const ZoneVector<MachineType>* types);
 
 Type* TypeGuardTypeOf(Operator const*) WARN_UNUSED_RESULT;
 
-int OsrValueIndexOf(Operator const*);
-
-enum class OsrGuardType { kUninitialized, kSignedSmall, kAny };
-size_t hash_value(OsrGuardType type);
-std::ostream& operator<<(std::ostream&, OsrGuardType);
-OsrGuardType OsrGuardTypeOf(Operator const*);
-
 // Interface for building common operators that can be used at any level of IR,
 // including JavaScript, mid-level, and low-level.
 class CommonOperatorBuilder final : public ZoneObject {
  public:
   explicit CommonOperatorBuilder(Zone* zone);
 
   const Operator* Dead();
   const Operator* End(size_t control_input_count);
   const Operator* Branch(BranchHint = BranchHint::kNone);
   const Operator* IfTrue();
@@ skipping 11 matching lines @@
   const Operator* Terminate();
 
   const Operator* Start(int value_output_count);
   const Operator* Loop(int control_input_count);
   const Operator* Merge(int control_input_count);
   const Operator* Parameter(int index, const char* debug_name = nullptr);
 
   const Operator* OsrNormalEntry();
   const Operator* OsrLoopEntry();
   const Operator* OsrValue(int index);
-  const Operator* OsrGuard(OsrGuardType type);
 
   const Operator* Int32Constant(int32_t);
   const Operator* Int64Constant(int64_t);
   const Operator* Float32Constant(volatile float);
   const Operator* Float64Constant(volatile double);
   const Operator* ExternalConstant(const ExternalReference&);
   const Operator* NumberConstant(volatile double);
   const Operator* HeapConstant(const Handle<HeapObject>&);
 
   const Operator* RelocatableInt32Constant(int32_t value,
@@ skipping 40 matching lines @@
   Zone* const zone_;
 
   DISALLOW_COPY_AND_ASSIGN(CommonOperatorBuilder);
 };
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_COMMON_OPERATOR_H_