PPC/s390: Reland [heap] Avoid the use of cells to point from code to new-space objects.

src/s390/macro-assembler-s390.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 <assert.h>  // For assert
 #include <limits.h>  // For LONG_MIN, LONG_MAX.
 
 #if V8_TARGET_ARCH_S390
 
 #include "src/base/bits.h"
@@ skipping 152 matching lines @@
 }
 
 void MacroAssembler::Call(Label* target) { b(r14, target); }
 
 void MacroAssembler::Push(Handle<Object> handle) {
   mov(r0, Operand(handle));
   push(r0);
 }
 
 void MacroAssembler::Move(Register dst, Handle<Object> value) {
-  AllowDeferredHandleDereference smi_check;
-  if (value->IsSmi()) {
-    LoadSmiLiteral(dst, reinterpret_cast<Smi*>(*value));
-  } else {
-    DCHECK(value->IsHeapObject());
-    if (isolate()->heap()->InNewSpace(*value)) {
-      Handle<Cell> cell = isolate()->factory()->NewCell(value);
-      mov(dst, Operand(cell));
-      LoadP(dst, FieldMemOperand(dst, Cell::kValueOffset));
-    } else {
-      mov(dst, Operand(value));
-    }
-  }
+  mov(dst, Operand(value));
 }
 
 void MacroAssembler::Move(Register dst, Register src, Condition cond) {
   if (!dst.is(src)) {
     LoadRR(dst, src);
   }
 }
 
 void MacroAssembler::Move(DoubleRegister dst, DoubleRegister src) {
   if (!dst.is(src)) {
@@ skipping 5319 matching lines @@
   }
   if (mag.shift > 0) ShiftRightArith(result, result, Operand(mag.shift));
   ExtractBit(r0, dividend, 31);
   AddP(result, r0);
 }
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_S390