[compiler] Move ensuring deoptimization support to backends.

src/crankshaft/hydrogen.cc

 // Copyright 2013 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/crankshaft/hydrogen.h"
 
 #include <sstream>
 
 #include "src/allocation-site-scopes.h"
 #include "src/ast/ast-numbering.h"
@@ skipping 96 matching lines @@
   void Visit##type(type* node) override {      \
     HOptimizedGraphBuilder::Visit##type(node); \
   }
   DECLARATION_NODE_LIST(DEF_VISIT)
 #undef DEF_VISIT
 };
 
 HCompilationJob::Status HCompilationJob::CreateGraphImpl() {
   bool dont_crankshaft = info()->shared_info()->dont_crankshaft();
 
+  // Optimization requires a version of fullcode with deoptimization support.
+  // Recompile the unoptimized version of the code if the current version
+  // doesn't have deoptimization support already.
+  // Otherwise, if we are gathering compilation time and space statistics
+  // for hydrogen, gather baseline statistics for a fullcode compilation.
+  bool should_recompile = !info()->shared_info()->has_deoptimization_support();
+  if (should_recompile || FLAG_hydrogen_stats) {
+    base::ElapsedTimer timer;
+    if (FLAG_hydrogen_stats) {
+      timer.Start();
+    }
+    if (!Compiler::EnsureDeoptimizationSupport(info())) {
+      return FAILED;
+    }
+    if (FLAG_hydrogen_stats) {
+      isolate()->GetHStatistics()->IncrementFullCodeGen(timer.Elapsed());
+    }
+  }
+  DCHECK(info()->shared_info()->has_deoptimization_support());
+  DCHECK(!info()->shared_info()->never_compiled());
+
   if (!isolate()->use_crankshaft() || dont_crankshaft) {
     // Crankshaft is entirely disabled.
     return FAILED;
   }
 
   // Check the whitelist for Crankshaft.
   if (!info()->shared_info()->PassesFilter(FLAG_hydrogen_filter)) {
     return AbortOptimization(kHydrogenFilter);
   }
 
@@ skipping 13587 matching lines @@
     isolate()->GetHTracer()->TraceHydrogen(name(), graph_);
   }
 
 #ifdef DEBUG
   graph_->Verify(false);  // No full verify.
 #endif
 }
 
 }  // namespace internal
 }  // namespace v8