[turbofan] Lower monomorphic loads during graph building.

src/compiler/js-inlining.cc

Index: src/compiler/js-inlining.cc
diff --git a/src/compiler/js-inlining.cc b/src/compiler/js-inlining.cc
index 4efcf4e042f81804177e5084ee6bd8befd56eef0..c3e9b90851a874c6dc8add48b940fa6834e98e71 100644
--- a/src/compiler/js-inlining.cc
+++ b/src/compiler/js-inlining.cc
@@ -374,8 +374,7 @@ bool JSInliner::DetermineCallTarget(
     // TODO(turbofan): We might want to revisit this restriction later when we
     // have a need for this, and we know how to model different native contexts
     // in the same graph in a compositional way.
-    if (function->context()->native_context() !=
-        info_->context()->native_context()) {
+    if (function->context()->native_context() != *native_context()) {
       return false;
     }
 
@@ -454,6 +453,10 @@ Reduction JSInliner::Reduce(Node* node) {
   return ReduceJSCall(node);
 }
 
+Handle<Context> JSInliner::native_context() const {
+  return handle(info_->context()->native_context());
+}
+
 Reduction JSInliner::ReduceJSCall(Node* node) {
   DCHECK(IrOpcode::IsInlineeOpcode(node->opcode()));
   Handle<SharedFunctionInfo> shared_info;
@@ -581,7 +584,8 @@ Reduction JSInliner::ReduceJSCall(Node* node) {
     }
     BytecodeGraphBuilder graph_builder(
         parse_info.zone(), shared_info, feedback_vector, BailoutId::None(),
-        jsgraph(), call.frequency(), source_positions_, inlining_id, flags);
+        jsgraph(), call.frequency(), source_positions_, native_context(),
+        info_->dependencies(), inlining_id, flags);
     graph_builder.CreateGraph(false);
 
     // Extract the inlinee start/end nodes.