[turbofan] Fix typed lowering of JSConvertReceiver.

src/compiler/js-operator.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/js-operator.h"
 
 #include <limits>
 
 #include "src/base/lazy-instance.h"
 #include "src/compiler/opcodes.h"
@@ skipping 672 matching lines @@
   return new (zone()) Operator1<CallConstructParameters>(   // --
       IrOpcode::kJSCallConstruct, Operator::kNoProperties,  // opcode
       "JSCallConstruct",                                    // name
       parameters.arity(), 1, 1, 1, 1, 2,                    // counts
       parameters);                                          // parameter
 }
 
 
 const Operator* JSOperatorBuilder::ConvertReceiver(
     ConvertReceiverMode convert_mode) {
-  return new (zone()) Operator1<ConvertReceiverMode>(    // --
-      IrOpcode::kJSConvertReceiver, Operator::kNoThrow,  // opcode
-      "JSConvertReceiver",                               // name
-      1, 1, 1, 1, 1, 0,                                  // counts
-      convert_mode);                                     // parameter
+  return new (zone()) Operator1<ConvertReceiverMode>(         // --
+      IrOpcode::kJSConvertReceiver, Operator::kEliminatable,  // opcode
+      "JSConvertReceiver",                                    // name
+      1, 1, 1, 1, 1, 0,                                       // counts
+      convert_mode);                                          // parameter
 }
 
 const Operator* JSOperatorBuilder::LoadNamed(Handle<Name> name,
                                              const VectorSlotPair& feedback) {
   NamedAccess access(SLOPPY, name, feedback);
   return new (zone()) Operator1<NamedAccess>(           // --
       IrOpcode::kJSLoadNamed, Operator::kNoProperties,  // opcode
       "JSLoadNamed",                                    // name
       2, 1, 1, 1, 1, 2,                                 // counts
       access);                                          // parameter
@@ skipping 207 matching lines @@
   return new (zone()) Operator1<Handle<ScopeInfo>>(               // --
       IrOpcode::kJSCreateScriptContext, Operator::kNoProperties,  // opcode
       "JSCreateScriptContext",                                    // name
       1, 1, 1, 1, 1, 2,                                           // counts
       scpope_info);                                               // parameter
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8