Remove receiver conversion from function prologue

src/crankshaft/mips64/lithium-codegen-mips64.cc

 // Copyright 2012 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/crankshaft/mips64/lithium-codegen-mips64.h"
 
 #include "src/code-factory.h"
 #include "src/code-stubs.h"
 #include "src/crankshaft/hydrogen-osr.h"
 #include "src/crankshaft/mips64/lithium-gap-resolver-mips64.h"
@@ skipping 95 matching lines @@
     if (strlen(FLAG_stop_at) > 0 &&
         info_->literal()->name()->IsUtf8EqualTo(CStrVector(FLAG_stop_at))) {
       __ stop("stop_at");
     }
 #endif
 
     // a1: Callee's JS function.
     // cp: Callee's context.
     // fp: Caller's frame pointer.
     // lr: Caller's pc.
-
-    // Sloppy mode functions and builtins need to replace the receiver with the
-    // global proxy when called as functions (without an explicit receiver
-    // object).
-    if (info()->MustReplaceUndefinedReceiverWithGlobalProxy()) {
-      Label ok;
-      int receiver_offset = info_->scope()->num_parameters() * kPointerSize;
-      __ LoadRoot(at, Heap::kUndefinedValueRootIndex);
-      __ ld(a2, MemOperand(sp, receiver_offset));
-      __ Branch(&ok, ne, a2, Operand(at));
-
-      __ ld(a2, GlobalObjectOperand());
-      __ ld(a2, FieldMemOperand(a2, JSGlobalObject::kGlobalProxyOffset));
-
-      __ sd(a2, MemOperand(sp, receiver_offset));
-
-      __ bind(&ok);
-    }
   }
 
   info()->set_prologue_offset(masm_->pc_offset());
   if (NeedsEagerFrame()) {
     if (info()->IsStub()) {
       __ StubPrologue();
     } else {
       __ Prologue(info()->IsCodePreAgingActive());
     }
     frame_is_built_ = true;
@@ skipping 5885 matching lines @@
   __ Push(at, ToRegister(instr->function()));
   CallRuntime(Runtime::kPushBlockContext, 2, instr);
   RecordSafepoint(Safepoint::kNoLazyDeopt);
 }
 
 
 #undef __
 
 }  // namespace internal
 }  // namespace v8