Revert "Merge old data and pointer space."

src/ppc/lithium-codegen-ppc.cc

Index: src/ppc/lithium-codegen-ppc.cc
diff --git a/src/ppc/lithium-codegen-ppc.cc b/src/ppc/lithium-codegen-ppc.cc
index 3653fd2af677f1169c04b95132b3c1b168d55b35..9af13ae23525989c6194b0905028e8aa135d6656 100644
--- a/src/ppc/lithium-codegen-ppc.cc
+++ b/src/ppc/lithium-codegen-ppc.cc
@@ -5687,9 +5687,13 @@ void LCodeGen::DoAllocate(LAllocate* instr) {
   if (instr->hydrogen()->MustAllocateDoubleAligned()) {
     flags = static_cast<AllocationFlags>(flags | DOUBLE_ALIGNMENT);
   }
-  if (instr->hydrogen()->IsOldSpaceAllocation()) {
+  if (instr->hydrogen()->IsOldPointerSpaceAllocation()) {
+    DCHECK(!instr->hydrogen()->IsOldDataSpaceAllocation());
     DCHECK(!instr->hydrogen()->IsNewSpaceAllocation());
-    flags = static_cast<AllocationFlags>(flags | PRETENURE);
+    flags = static_cast<AllocationFlags>(flags | PRETENURE_OLD_POINTER_SPACE);
+  } else if (instr->hydrogen()->IsOldDataSpaceAllocation()) {
+    DCHECK(!instr->hydrogen()->IsNewSpaceAllocation());
+    flags = static_cast<AllocationFlags>(flags | PRETENURE_OLD_DATA_SPACE);
   }
 
   if (instr->size()->IsConstantOperand()) {
@@ -5755,9 +5759,13 @@ void LCodeGen::DoDeferredAllocate(LAllocate* instr) {
 
   int flags = AllocateDoubleAlignFlag::encode(
       instr->hydrogen()->MustAllocateDoubleAligned());
-  if (instr->hydrogen()->IsOldSpaceAllocation()) {
+  if (instr->hydrogen()->IsOldPointerSpaceAllocation()) {
+    DCHECK(!instr->hydrogen()->IsOldDataSpaceAllocation());
+    DCHECK(!instr->hydrogen()->IsNewSpaceAllocation());
+    flags = AllocateTargetSpace::update(flags, OLD_POINTER_SPACE);
+  } else if (instr->hydrogen()->IsOldDataSpaceAllocation()) {
     DCHECK(!instr->hydrogen()->IsNewSpaceAllocation());
-    flags = AllocateTargetSpace::update(flags, OLD_SPACE);
+    flags = AllocateTargetSpace::update(flags, OLD_DATA_SPACE);
   } else {
     flags = AllocateTargetSpace::update(flags, NEW_SPACE);
   }