Revert of [turbofan] Remove the leftover LoadBuffer hacks.

src/compiler/pipeline.cc

Index: src/compiler/pipeline.cc
diff --git a/src/compiler/pipeline.cc b/src/compiler/pipeline.cc
index 723cb46159723d1e8b00128749404884850d2174..b3344d9a9e6d44259ccc6f94df183212cd83a5dd 100644
--- a/src/compiler/pipeline.cc
+++ b/src/compiler/pipeline.cc
@@ -767,6 +767,12 @@
                                 data->source_positions());
     lowering.LowerAllNodes();
 
+    // TODO(bmeurer): See comment on SimplifiedLowering::abort_compilation_.
+    if (lowering.abort_compilation_) {
+      data->set_compilation_failed();
+      return;
+    }
+
     JSGraphReducer graph_reducer(data->jsgraph(), temp_zone);
     DeadCodeElimination dead_code_elimination(&graph_reducer, data->graph(),
                                               data->common());
@@ -1277,6 +1283,9 @@
   // Kill the Typer and thereby uninstall the decorator (if any).
   typer.Reset(nullptr);
 
+  // TODO(bmeurer): See comment on SimplifiedLowering::abort_compilation_.
+  if (data.compilation_failed()) return Handle<Code>::null();
+
   return ScheduleAndGenerateCode(
       Linkage::ComputeIncoming(data.instruction_zone(), info()));
 }