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

src/mips64/macro-assembler-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 <limits.h>  // For LONG_MIN, LONG_MAX.
 
 #if V8_TARGET_ARCH_MIPS64
 
 #include "src/base/division-by-constant.h"
 #include "src/bootstrapper.h"
@@ skipping 1619 matching lines @@
   if (kArchVariant == kMips64r6) {
     sdc1(fd, rs);
   } else {
     DCHECK(kArchVariant == kMips64r2);
     dmfc1(scratch, fd);
     Usd(scratch, rs);
   }
 }
 
 void MacroAssembler::li(Register dst, Handle<Object> value, LiFlags mode) {
-  AllowDeferredHandleDereference smi_check;
-  if (value->IsSmi()) {
-    li(dst, Operand(value), mode);
-  } else {
-    DCHECK(value->IsHeapObject());
-    if (isolate()->heap()->InNewSpace(*value)) {
-      Handle<Cell> cell = isolate()->factory()->NewCell(value);
-      li(dst, Operand(cell));
-      ld(dst, FieldMemOperand(dst, Cell::kValueOffset));
-    } else {
-      li(dst, Operand(value));
-    }
-  }
+  li(dst, Operand(value), mode);
 }
 
 static inline int64_t ShiftAndFixSignExtension(int64_t imm, int bitnum) {
   if ((imm >> (bitnum - 1)) & 0x1) {
     imm = (imm >> bitnum) + 1;
   } else {
     imm = imm >> bitnum;
   }
   return imm;
 }
@@ skipping 5596 matching lines @@
   if (mag.shift > 0) sra(result, result, mag.shift);
   srl(at, dividend, 31);
   Addu(result, result, Operand(at));
 }
 
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_MIPS64