PPC: [heap] Move to page lookups for SemiSpace, NewSpace, and Heap containment methods

src/ppc/macro-assembler-ppc.cc

Index: src/ppc/macro-assembler-ppc.cc
diff --git a/src/ppc/macro-assembler-ppc.cc b/src/ppc/macro-assembler-ppc.cc
index f4f58e6c29c7605a9b0aa23e9509d33464037278..381b8e1476e3798adce742625cb06045378bd80b 100644
--- a/src/ppc/macro-assembler-ppc.cc
+++ b/src/ppc/macro-assembler-ppc.cc
@@ -302,13 +302,10 @@ void MacroAssembler::StoreRoot(Register source, Heap::RootListIndex index,
 
 void MacroAssembler::InNewSpace(Register object, Register scratch,
                                 Condition cond, Label* branch) {
-  // N.B. scratch may be same register as object
   DCHECK(cond == eq || cond == ne);
-  mov(r0, Operand(ExternalReference::new_space_mask(isolate())));
-  and_(scratch, object, r0);
-  mov(r0, Operand(ExternalReference::new_space_start(isolate())));
-  cmp(scratch, r0);
-  b(cond, branch);
+  const int mask =
+      (1 << MemoryChunk::IN_FROM_SPACE) | (1 << MemoryChunk::IN_TO_SPACE);
+  CheckPageFlag(object, scratch, mask, cond, branch);
 }