[turbofan] Improve --trace-turbo-inlining

Add inlined bytecode size to candidate print, both bytecode size and
inlined bytecode size decide whether candidate to be inlined.

Change-Id: I6d659bb59819b0e9daad5289f47f329aa3ce9f7e
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2191631Reviewed-by: Georg Neis <neis@chromium.org>
Commit-Queue: Georg Neis <neis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#67730}

src/compiler/js-inlining-heuristic.cc

@@ -784,6 +784,13 @@ void JSInliningHeuristic::PrintCandidates() {
       os << "  - target: " << shared;
       if (candidate.bytecode[i].has_value()) {
         os << ", bytecode size: " << candidate.bytecode[i]->length();
+        if (candidate.functions[i].has_value()) {
+          JSFunctionRef function = candidate.functions[i].value();
+          if (function.IsOptimized()) {
+            os << ", existing opt code's inlined bytecode size: "
+               << function.code().inlined_bytecode_size();
+          }
+        }
       } else {
         os << ", no bytecode";
       }