Revert of [turbofan] Don't take into account source size for inlining heuristics.

src/compiler/js-inlining-heuristic.cc

 // Copyright 2015 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/js-inlining-heuristic.h"
 
 #include "src/compilation-info.h"
 #include "src/compiler/common-operator.h"
 #include "src/compiler/node-matchers.h"
 #include "src/compiler/simplified-operator.h"
@@ skipping 31 matching lines @@
   return 0;
 }
 
 bool CanInlineFunction(Handle<JSFunction> function) {
   // Built-in functions are handled by the JSBuiltinReducer.
   if (function->shared()->HasBuiltinFunctionId()) return false;
 
   // Don't inline builtins.
   if (function->shared()->IsBuiltin()) return false;
 
+  // Quick check on source code length to avoid parsing large candidate.
+  if (function->shared()->SourceSize() > FLAG_max_inlined_source_size) {
+    return false;
+  }
+
   // Quick check on the size of the AST to avoid parsing large candidate.
   if (function->shared()->ast_node_count() > FLAG_max_inlined_nodes) {
     return false;
   }
 
   // Avoid inlining across the boundary of asm.js code.
   if (function->shared()->asm_function()) return false;
   return true;
 }
 
@@ skipping 213 matching lines @@
   }
 }
 
 void JSInliningHeuristic::PrintCandidates() {
   PrintF("Candidates for inlining (size=%zu):\n", candidates_.size());
   for (const Candidate& candidate : candidates_) {
     PrintF("  #%d:%s, frequency:%g\n", candidate.node->id(),
            candidate.node->op()->mnemonic(), candidate.frequency);
     for (int i = 0; i < candidate.num_functions; ++i) {
       Handle<JSFunction> function = candidate.functions[i];
-      PrintF("  - size:%d, name: %s\n", function->shared()->ast_node_count(),
+      PrintF("  - size[source]:%d, size[ast]:%d, name: %s\n",
+             function->shared()->SourceSize(),
+             function->shared()->ast_node_count(),
              function->shared()->DebugName()->ToCString().get());
     }
   }
 }
 
 Graph* JSInliningHeuristic::graph() const { return jsgraph()->graph(); }
 
 CommonOperatorBuilder* JSInliningHeuristic::common() const {
   return jsgraph()->common();
 }
 
 SimplifiedOperatorBuilder* JSInliningHeuristic::simplified() const {
   return jsgraph()->simplified();
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8