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

src/ppc/assembler-ppc.cc

Index: src/ppc/assembler-ppc.cc
diff --git a/src/ppc/assembler-ppc.cc b/src/ppc/assembler-ppc.cc
index 2ce601e02cc4d8c7f2cdb87b1534c05ac629f289..82ef8fb610f090b0e3f55420e567da8e4c645150 100644
--- a/src/ppc/assembler-ppc.cc
+++ b/src/ppc/assembler-ppc.cc
@@ -193,7 +193,6 @@ Operand::Operand(Handle<Object> handle) {
   // Verify all Objects referred by code are NOT in new space.
   Object* obj = *handle;
   if (obj->IsHeapObject()) {
-    DCHECK(!HeapObject::cast(obj)->GetHeap()->InNewSpace(obj));
     imm_ = reinterpret_cast<intptr_t>(handle.location());
     rmode_ = RelocInfo::EMBEDDED_OBJECT;
   } else {