[turbofan] Pass scope infos as static operator parameters.

src/compiler/js-typed-lowering.cc

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/code-factory.h"
 #include "src/compiler/access-builder.h"
 #include "src/compiler/js-graph.h"
 #include "src/compiler/js-typed-lowering.h"
 #include "src/compiler/linkage.h"
 #include "src/compiler/node-matchers.h"
@@ skipping 1241 matching lines @@
     node->TrimInputCount(2);
     NodeProperties::ChangeOp(node, common()->Finish(1));
     return Changed(node);
   }
   return NoChange();
 }
 
 
 Reduction JSTypedLowering::ReduceJSCreateBlockContext(Node* node) {
   DCHECK_EQ(IrOpcode::kJSCreateBlockContext, node->opcode());
-  Node* const input = NodeProperties::GetValueInput(node, 0);
-  HeapObjectMatcher minput(input);
-  DCHECK(minput.HasValue());  // TODO(mstarzinger): Make ScopeInfo static.
-  int context_length = Handle<ScopeInfo>::cast(minput.Value())->ContextLength();
+  Handle<ScopeInfo> scope_info = OpParameter<Handle<ScopeInfo>>(node);
+  int context_length = scope_info->ContextLength();
   if (FLAG_turbo_allocate && context_length < kBlockContextAllocationLimit) {
     // JSCreateBlockContext(s:scope[length < limit], f)
     Node* const effect = NodeProperties::GetEffectInput(node);
     Node* const control = NodeProperties::GetControlInput(node);
     Node* const closure = NodeProperties::GetValueInput(node, 1);
     Node* const context = NodeProperties::GetContextInput(node);
+    Node* const extension = jsgraph()->Constant(scope_info);
     Node* const load = graph()->NewNode(
         simplified()->LoadField(
             AccessBuilder::ForContextSlot(Context::GLOBAL_OBJECT_INDEX)),
         context, effect, control);
     AllocationBuilder a(jsgraph(), simplified(), effect, control);
     STATIC_ASSERT(Context::MIN_CONTEXT_SLOTS == 4);  // Ensure fully covered.
     a.AllocateArray(context_length, factory()->block_context_map());
     a.Store(AccessBuilder::ForContextSlot(Context::CLOSURE_INDEX), closure);
     a.Store(AccessBuilder::ForContextSlot(Context::PREVIOUS_INDEX), context);
-    a.Store(AccessBuilder::ForContextSlot(Context::EXTENSION_INDEX), input);
+    a.Store(AccessBuilder::ForContextSlot(Context::EXTENSION_INDEX), extension);
     a.Store(AccessBuilder::ForContextSlot(Context::GLOBAL_OBJECT_INDEX), load);
     for (int i = Context::MIN_CONTEXT_SLOTS; i < context_length; ++i) {
       a.Store(AccessBuilder::ForContextSlot(i), jsgraph()->TheHoleConstant());
     }
     // TODO(mstarzinger): We could mutate {node} into the allocation instead.
     NodeProperties::SetType(a.allocation(), NodeProperties::GetType(node));
     ReplaceWithValue(node, node, a.effect());
     node->ReplaceInput(0, a.allocation());
     node->ReplaceInput(1, a.effect());
     node->TrimInputCount(2);
@@ skipping 454 matching lines @@
 }
 
 
 MachineOperatorBuilder* JSTypedLowering::machine() const {
   return jsgraph()->machine();
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8