Make TurboFan inlining work without deoptimization.

R=titzer@chromium.org

Review URL: https://codereview.chromium.org/726823002

Cr-Commit-Position: refs/heads/master@{#25354}

src/compiler.cc

@@ -876,7 +876,6 @@ MaybeHandle<Code> Compiler::GetLazyCode(Handle<JSFunction> function) {
 
     info.MarkAsContextSpecializing();
     info.MarkAsTypingEnabled();
-    info.MarkAsInliningDisabled();
 
     if (GetOptimizedCodeNow(&info)) {
       DCHECK(function->shared()->is_compiled());

src/compiler.h

@@ -200,8 +200,6 @@ class CompilationInfo {
 
   void MarkAsInliningEnabled() { SetFlag(kInliningEnabled); }
 
-  void MarkAsInliningDisabled() { SetFlag(kInliningEnabled, false); }
-
   bool is_inlining_enabled() const { return GetFlag(kInliningEnabled); }
 
   void MarkAsTypingEnabled() { SetFlag(kTypingEnabled); }

src/compiler/js-inlining.cc

@@ -405,19 +405,21 @@ void JSInliner::TryInlineJSCall(Node* call_node) {
 
   Inlinee inlinee(visitor.GetCopy(graph.start()), visitor.GetCopy(graph.end()));
 
-  Node* outer_frame_state = call.frame_state();
-  // Insert argument adaptor frame if required.
-  if (call.formal_arguments() != inlinee.formal_parameters()) {
-    outer_frame_state =
-        CreateArgumentsAdaptorFrameState(&call, function, info.zone());
-  }
+  if (FLAG_turbo_deoptimization) {
+    Node* outer_frame_state = call.frame_state();
+    // Insert argument adaptor frame if required.
+    if (call.formal_arguments() != inlinee.formal_parameters()) {
+      outer_frame_state =
+          CreateArgumentsAdaptorFrameState(&call, function, info.zone());
+    }
 
-  for (NodeVectorConstIter it = visitor.copies().begin();
-       it != visitor.copies().end(); ++it) {
-    Node* node = *it;
-    if (node != NULL && node->opcode() == IrOpcode::kFrameState) {
-      AddClosureToFrameState(node, function);
-      NodeProperties::ReplaceFrameStateInput(node, outer_frame_state);
+    for (NodeVectorConstIter it = visitor.copies().begin();
+         it != visitor.copies().end(); ++it) {
+      Node* node = *it;
+      if (node != NULL && node->opcode() == IrOpcode::kFrameState) {
+        AddClosureToFrameState(node, function);
+        NodeProperties::ReplaceFrameStateInput(node, outer_frame_state);
+      }
     }
   }