Added old data space allocation infrastructure for pretenuring.

src/x64/lithium-codegen-x64.cc

Index: src/x64/lithium-codegen-x64.cc
diff --git a/src/x64/lithium-codegen-x64.cc b/src/x64/lithium-codegen-x64.cc
index 109c25ad5e41a4867af4a924615343495304161f..dcd841a4b33f52c41ba6f76a678b995440f02532 100644
--- a/src/x64/lithium-codegen-x64.cc
+++ b/src/x64/lithium-codegen-x64.cc
@@ -5197,8 +5197,12 @@ void LCodeGen::DoAllocate(LAllocate* instr) {
     flags = static_cast<AllocationFlags>(flags | DOUBLE_ALIGNMENT);
   }
   if (instr->hydrogen()->CanAllocateInOldPointerSpace()) {
+    ASSERT(!instr->hydrogen()->CanAllocateInOldDataSpace());
     flags = static_cast<AllocationFlags>(flags | PRETENURE_OLD_POINTER_SPACE);
+  } else if (instr->hydrogen()->CanAllocateInOldDataSpace()) {
+    flags = static_cast<AllocationFlags>(flags | PRETENURE_OLD_DATA_SPACE);
   }
+
   if (instr->size()->IsConstantOperand()) {
     int32_t size = ToInteger32(LConstantOperand::cast(instr->size()));
     __ Allocate(size, result, temp, no_reg, deferred->entry(), flags);
@@ -5231,11 +5235,12 @@ void LCodeGen::DoDeferredAllocate(LAllocate* instr) {
   }
 
   if (instr->hydrogen()->CanAllocateInOldPointerSpace()) {
-    CallRuntimeFromDeferred(
-        Runtime::kAllocateInOldPointerSpace, 1, instr);
+    ASSERT(!instr->hydrogen()->CanAllocateInOldDataSpace());
+    CallRuntimeFromDeferred(Runtime::kAllocateInOldPointerSpace, 1, instr);
+  } else if (instr->hydrogen()->CanAllocateInOldDataSpace()) {
+    CallRuntimeFromDeferred(Runtime::kAllocateInOldDataSpace, 1, instr);
   } else {
-    CallRuntimeFromDeferred(
-        Runtime::kAllocateInNewSpace, 1, instr);
+    CallRuntimeFromDeferred(Runtime::kAllocateInNewSpace, 1, instr);
   }
   __ StoreToSafepointRegisterSlot(result, rax);
 }