S390: Get rid of AllocationFlags::TAG_OBJECT

src/s390/codegen-s390.cc

Index: src/s390/codegen-s390.cc
diff --git a/src/s390/codegen-s390.cc b/src/s390/codegen-s390.cc
index 6636a7ca1d00e1e850e672a30b8e20936c79c301..fe94c94a50a820a0f34ec1ba0207fb3a08dc8e0f 100644
--- a/src/s390/codegen-s390.cc
+++ b/src/s390/codegen-s390.cc
@@ -172,7 +172,7 @@ void ElementsTransitionGenerator::GenerateSmiToDouble(
   __ SmiToDoubleArrayOffset(r14, length);
   __ AddP(r14, Operand(FixedDoubleArray::kHeaderSize));
   __ Allocate(r14, array, r9, scratch2, &gc_required, DOUBLE_ALIGNMENT);
-
+  __ SubP(array, array, Operand(kHeapObjectTag));
   // Set destination FixedDoubleArray's length and map.
   __ LoadRoot(scratch2, Heap::kFixedDoubleArrayMapRootIndex);
   __ StoreP(length, MemOperand(array, FixedDoubleArray::kLengthOffset));
@@ -302,12 +302,12 @@ void ElementsTransitionGenerator::GenerateDoubleToObject(
   __ AddP(array_size, r0);
   __ Allocate(array_size, array, allocate_scratch, scratch, &gc_required,
               NO_ALLOCATION_FLAGS);
-  // array: destination FixedArray, not tagged as heap object
+  // array: destination FixedArray, tagged as heap object
   // Set destination FixedDoubleArray's length and map.
   __ LoadRoot(scratch, Heap::kFixedArrayMapRootIndex);
-  __ StoreP(length, MemOperand(array, FixedDoubleArray::kLengthOffset));
-  __ StoreP(scratch, MemOperand(array, HeapObject::kMapOffset));
-  __ AddP(array, Operand(kHeapObjectTag));
+  __ StoreP(length, FieldMemOperand(array, FixedDoubleArray::kLengthOffset),
+            r0);
+  __ StoreP(scratch, FieldMemOperand(array, HeapObject::kMapOffset), r0);
 
   // Prepare for conversion loop.
   Register src_elements = elements;