[fullcodegen] Remove deprecated generator implementation.

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 <memory>
 
 #include "src/asmjs/asm-js.h"
@@ skipping 309 matching lines @@
   // 3. Explicitly enabled by the command-line filter.
   bool passes_turbo_filter = shared->PassesFilter(FLAG_turbo_filter);
 
   return is_turbofanable_asm || is_unsupported_by_crankshaft_but_turbofanable ||
          passes_turbo_filter;
 }
 
 bool ShouldUseIgnition(CompilationInfo* info) {
   DCHECK(info->has_shared_info());
 
+  // Resumable functions are not supported by {FullCodeGenerator}, suspended
+  // activations stored as {JSGeneratorObject} on the heap always assume the
+  // underlying code to be based on the bytecode array.
+  // TODO(mstarzinger): Once we want to deprecate even more support from the
+  // {FullCodeGenerator}, we will compute an appropriate bit in {AstNumbering}
+  // and turn this predicate into a DCHECK instead.
+  if (IsResumableFunction(info->shared_info()->kind())) {
+    return true;
+  }
+
   // Skip Ignition for asm.js functions.
   if (info->shared_info()->asm_function()) {
     return false;
   }
 
   // When requesting debug code as a replacement for existing code, we provide
   // the same kind as the existing code (to prevent implicit tier-change).
   if (info->is_debug() && info->shared_info()->is_compiled()) {
     return !info->shared_info()->HasBaselineCode();
   }
@@ skipping 1381 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