Merge old data and pointer space.

src/x64/macro-assembler-x64.cc

Index: src/x64/macro-assembler-x64.cc
diff --git a/src/x64/macro-assembler-x64.cc b/src/x64/macro-assembler-x64.cc
index 5a17b3a6f3aa2e10fa0743196f8901fe2779fd28..89e5cc9a9c65e9deaa9acee0a917f1553ecd941c 100644
--- a/src/x64/macro-assembler-x64.cc
+++ b/src/x64/macro-assembler-x64.cc
@@ -4122,7 +4122,6 @@ void MacroAssembler::MakeSureDoubleAlignedHelper(Register result,
     // Align the next allocation. Storing the filler map without checking top
     // is safe in new-space because the limit of the heap is aligned there.
     DCHECK(kPointerSize * 2 == kDoubleSize);
-    DCHECK((flags & PRETENURE_OLD_POINTER_SPACE) == 0);
     DCHECK(kPointerAlignment * 2 == kDoubleAlignment);
     // Make sure scratch is not clobbered by this function as it might be
     // used in UpdateAllocationTopHelper later.
@@ -4130,7 +4129,7 @@ void MacroAssembler::MakeSureDoubleAlignedHelper(Register result,
     Label aligned;
     testl(result, Immediate(kDoubleAlignmentMask));
     j(zero, &aligned, Label::kNear);
-    if ((flags & PRETENURE_OLD_DATA_SPACE) != 0) {
+    if ((flags & PRETENURE) != 0) {
       ExternalReference allocation_limit =
           AllocationUtils::GetAllocationLimitReference(isolate(), flags);
       cmpp(result, ExternalOperand(allocation_limit));