Perform receiver patching for sloppy mode in high-level IR.

src/compiler/x64/code-generator-x64.cc

 // Copyright 2013 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/code-generator.h"
 
 #include "src/compiler/code-generator-impl.h"
 #include "src/compiler/gap-resolver.h"
 #include "src/compiler/node-matchers.h"
 #include "src/compiler/node-properties-inl.h"
@@ skipping 781 matching lines @@
         __ pushq(Register::from_code(i));
         register_save_area_size += kPointerSize;
       }
       frame()->SetRegisterSaveAreaSize(register_save_area_size);
     }
   } else if (descriptor->IsJSFunctionCall()) {
     CompilationInfo* info = this->info();
     __ Prologue(info->IsCodePreAgingActive());
     frame()->SetRegisterSaveAreaSize(
         StandardFrameConstants::kFixedFrameSizeFromFp);
-
-    // Sloppy mode functions and builtins need to replace the receiver with the
-    // global proxy when called as functions (without an explicit receiver
-    // object).
-    // TODO(mstarzinger/verwaest): Should this be moved back into the CallIC?
-    if (info->strict_mode() == SLOPPY && !info->is_native()) {
-      Label ok;
-      StackArgumentsAccessor args(rbp, info->scope()->num_parameters());
-      __ movp(rcx, args.GetReceiverOperand());
-      __ CompareRoot(rcx, Heap::kUndefinedValueRootIndex);
-      __ j(not_equal, &ok, Label::kNear);
-      __ movp(rcx, GlobalObjectOperand());
-      __ movp(rcx, FieldOperand(rcx, GlobalObject::kGlobalProxyOffset));
-      __ movp(args.GetReceiverOperand(), rcx);
-      __ bind(&ok);
-    }
-
   } else {
     __ StubPrologue();
     frame()->SetRegisterSaveAreaSize(
         StandardFrameConstants::kFixedFrameSizeFromFp);
   }
   if (stack_slots > 0) {
     __ subq(rsp, Immediate(stack_slots * kPointerSize));
   }
 }
 
@@ skipping 202 matching lines @@
     }
   }
   MarkLazyDeoptSite();
 }
 
 #undef __
 
 }  // namespace internal
 }  // namespace compiler
 }  // namespace v8