Towards removing dependency from generic lowering on compilation info.

src/compiler/pipeline.cc

Index: src/compiler/pipeline.cc
diff --git a/src/compiler/pipeline.cc b/src/compiler/pipeline.cc
index 2e9ef98b657cf4d4b91bf710660c6e1324371052..22a344f342acbfce544e3bc89902bf4a686eac24 100644
--- a/src/compiler/pipeline.cc
+++ b/src/compiler/pipeline.cc
@@ -185,11 +185,12 @@ Handle<Code> Pipeline::GenerateCode() {
 
   VerifyAndPrintGraph(&graph, "Initial untyped");
 
+  JSContextSpecializer spec(info(), &jsgraph, context_node);
+
   if (FLAG_context_specialization) {
     SourcePositionTable::Scope pos_(&source_positions,
                                     SourcePosition::Unknown());
     // Specialize the code to the context as aggressively as possible.
-    JSContextSpecializer spec(info(), &jsgraph, context_node);
     spec.SpecializeToContext();
     VerifyAndPrintGraph(&graph, "Context specialized");
   }
@@ -224,6 +225,7 @@ Handle<Code> Pipeline::GenerateCode() {
 
   Handle<Code> code = Handle<Code>::null();
   if (SupportedTarget()) {
+    Linkage linkage(info());
     {
       // Lower any remaining generic JSOperators.
       PhaseStats lowering_stats(info(), PhaseStats::CREATE_GRAPH,
@@ -231,7 +233,7 @@ Handle<Code> Pipeline::GenerateCode() {
       SourcePositionTable::Scope pos(&source_positions,
                                      SourcePosition::Unknown());
       MachineOperatorBuilder machine(zone());
-      JSGenericLowering lowering(info(), &jsgraph, &machine);
+      JSGenericLowering lowering(&jsgraph, &spec, &linkage, &machine);
       GraphReducer graph_reducer(&graph);
       graph_reducer.AddReducer(&lowering);
       graph_reducer.ReduceGraph();
@@ -246,7 +248,7 @@ Handle<Code> Pipeline::GenerateCode() {
     {
       // Generate optimized code.
       PhaseStats codegen_stats(info(), PhaseStats::CODEGEN, "codegen");
-      Linkage linkage(info());
+
       code = GenerateCode(&linkage, &graph, schedule, &source_positions);
       info()->SetCode(code);
     }