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

src/mips/macro-assembler-mips.cc

Index: src/mips/macro-assembler-mips.cc
diff --git a/src/mips/macro-assembler-mips.cc b/src/mips/macro-assembler-mips.cc
index 903ed6324371bbbe0ba83b4109fec86aadec10a4..a07ebd5b434ccb5e2809fe3dce7e6d0e48b086da 100644
--- a/src/mips/macro-assembler-mips.cc
+++ b/src/mips/macro-assembler-mips.cc
@@ -1402,7 +1402,19 @@
 
 
 void MacroAssembler::li(Register dst, Handle<Object> value, LiFlags mode) {
-  li(dst, Operand(value), 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));
+      lw(dst, FieldMemOperand(dst, Cell::kValueOffset));
+    } else {
+      li(dst, Operand(value));
+    }
+  }
 }