[turbofan] Ignore uninlineable functions when computing smallness

Change-Id: I94c29febf3f89d8b907dd879413d4a113ca1d0df
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1826723Reviewed-by: Maya Lekova <mslekova@chromium.org>
Commit-Queue: Georg Neis <neis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#63997}

src/compiler/js-inlining-heuristic.cc

@@ -157,8 +157,8 @@ Reduction JSInliningHeuristic::Reduce(Node* node) {
     if (candidate.can_inline_function[i]) {
       can_inline_candidate = true;
       candidate.total_size += bytecode.length();
+      candidate_is_small = candidate_is_small && IsSmall(bytecode);
     }
-    candidate_is_small = candidate_is_small && IsSmall(bytecode);
   }
   if (!can_inline_candidate) return NoChange();