[turbofan] Remove fallback to TurboFan when Crankshaft bails out.

src/compiler.cc

 // Copyright 2012 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/compiler.h"
 
 #include <algorithm>
 
 #include "src/asmjs/asm-js.h"
 #include "src/asmjs/typing-asm.h"
@@ skipping 125 matching lines @@
       bailout_reason_(kNoReason),
       prologue_offset_(Code::kPrologueOffsetNotSet),
       track_positions_(FLAG_hydrogen_track_positions ||
                        isolate->is_profiling()),
       parameter_count_(0),
       optimization_id_(-1),
       osr_expr_stack_height_(0),
       debug_name_(debug_name) {}
 
 CompilationInfo::~CompilationInfo() {
-  DisableFutureOptimization();
+  if (GetFlag(kDisableFutureOptimization) && has_shared_info()) {
+    shared_info()->DisableOptimization(bailout_reason());
+  }
   dependencies()->Rollback();
   delete deferred_handles_;
 }
 
 
 int CompilationInfo::num_parameters() const {
   return !IsStub() ? scope()->num_parameters() : parameter_count_;
 }
 
 
@@ skipping 463 matching lines @@
                               parse_info->literal())) {
     return false;
   }
   Handle<SharedFunctionInfo> shared_info = parse_info->shared_info();
   if (!shared_info.is_null()) {
     FunctionLiteral* lit = parse_info->literal();
     shared_info->set_ast_node_count(lit->ast_node_count());
     if (lit->dont_optimize_reason() != kNoReason) {
       shared_info->DisableOptimization(lit->dont_optimize_reason());
     }
-    shared_info->set_dont_crankshaft(
-        shared_info->dont_crankshaft() ||
-        (lit->flags() & AstProperties::kDontCrankshaft));
+    if (lit->flags() & AstProperties::kDontCrankshaft) {
+      shared_info->set_dont_crankshaft(true);
+    }
   }
   return true;
 }
 
 bool UseTurboFan(Handle<SharedFunctionInfo> shared) {
   bool optimization_disabled = shared->optimization_disabled();
   bool dont_crankshaft = shared->dont_crankshaft();
 
   // Check the enabling conditions for Turbofan.
   // 1. "use asm" code.
@@ skipping 1195 matching lines @@
     DCHECK(shared->is_compiled());
     function->set_literals(cached.literals);
   } else if (shared->is_compiled()) {
     // TODO(mvstanton): pass pretenure flag to EnsureLiterals.
     JSFunction::EnsureLiterals(function);
   }
 }
 
 }  // namespace internal
 }  // namespace v8