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

src/mips64/macro-assembler-mips64.cc

Index: src/mips64/macro-assembler-mips64.cc
diff --git a/src/mips64/macro-assembler-mips64.cc b/src/mips64/macro-assembler-mips64.cc
index 4abc16c1e740e21dd26901aceef2910cf9c6d24a..c69d2ae7f8580aac7212adfd70f2626b1781df55 100644
--- a/src/mips64/macro-assembler-mips64.cc
+++ b/src/mips64/macro-assembler-mips64.cc
@@ -1597,11 +1597,18 @@
 }
 
 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());
-    li(dst, Operand(value));
+    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));
+    }
   }
 }