Make --always-opt also optimize toplevel code.

src/arm64/lithium-codegen-arm64.cc

Index: src/arm64/lithium-codegen-arm64.cc
diff --git a/src/arm64/lithium-codegen-arm64.cc b/src/arm64/lithium-codegen-arm64.cc
index 3f6be920af459a8b1d9aff48f7e0a2076faacf24..eee1707cdb3b6b861584a2b220b7ff316c1098b0 100644
--- a/src/arm64/lithium-codegen-arm64.cc
+++ b/src/arm64/lithium-codegen-arm64.cc
@@ -689,7 +689,13 @@ bool LCodeGen::GeneratePrologue() {
     Comment(";;; Allocate local context");
     bool need_write_barrier = true;
     // Argument to NewContext is the function, which is in x1.
-    if (heap_slots <= FastNewContextStub::kMaximumSlots) {
+    if (FLAG_harmony_scoping && info()->scope()->is_global_scope()) {
+      UseScratchRegisterScope temps(masm());
+      Register scope_info = temps.AcquireX();
+      __ Mov(scope_info, Operand(info()->scope()->GetScopeInfo()));
+      __ Push(x1, scope_info);
+      __ CallRuntime(Runtime::kNewGlobalContext, 2);
+    } else if (heap_slots <= FastNewContextStub::kMaximumSlots) {
       FastNewContextStub stub(isolate(), heap_slots);
       __ CallStub(&stub);
       // Result of FastNewContextStub is always in new space.
@@ -5034,8 +5040,6 @@ void LCodeGen::DoDeclareGlobals(LDeclareGlobals* instr) {
   Register scratch1 = x5;
   Register scratch2 = x6;
   ASSERT(instr->IsMarkedAsCall());
-
-  ASM_UNIMPLEMENTED_BREAK("DoDeclareGlobals");
   // TODO(all): if Mov could handle object in new space then it could be used
   // here.
   __ LoadHeapObject(scratch1, instr->hydrogen()->pairs());