[compiler] Move ensuring deoptimization support to backends.

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/ast/ast-numbering.h"
 #include "src/ast/prettyprinter.h"
@@ skipping 304 matching lines @@
     return AbortOptimization(kFunctionBeingDebugged);
   }
 
   // Limit the number of times we try to optimize functions.
   const int kMaxOptCount =
       FLAG_deopt_every_n_times == 0 ? FLAG_max_opt_count : 1000;
   if (info()->shared_info()->opt_count() > kMaxOptCount) {
     return AbortOptimization(kOptimizedTooManyTimes);
   }
 
-  // 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 SetLastStatus(FAILED);
-    }
-    if (FLAG_hydrogen_stats) {
-      isolate()->GetHStatistics()->IncrementFullCodeGen(timer.Elapsed());
-    }
-  }
-
-  DCHECK(info()->shared_info()->has_deoptimization_support());
-  DCHECK(!info()->shared_info()->never_compiled());
-
   if (FLAG_trace_opt) {
     OFStream os(stdout);
     os << "[compiling method " << Brief(*info()->closure()) << " using "
        << compiler_name_;
     if (info()->is_osr()) os << " OSR";
     os << "]" << std::endl;
   }
 
   // Delegate to the underlying implementation.
   DCHECK_EQ(SUCCEEDED, last_status());
@@ skipping 1325 matching lines @@
     MaybeHandle<Code> code;
     if (cached.code != nullptr) code = handle(cached.code);
     Handle<Context> native_context(function->context()->native_context());
     SharedFunctionInfo::AddToOptimizedCodeMap(shared, native_context, code,
                                               literals, BailoutId::None());
   }
 }
 
 }  // namespace internal
 }  // namespace v8