[baseline] Don't install if bytecode has been flushed

The bytecode can be flushed and/or the function can be
compiled and installed before the interruption to install
the new batch of compiled baseline code.

Bug: v8:12415, v8:12054
Change-Id: I092c8e0f31735119e6b2c6c46ce97ba8a4cdc91e
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3302788Reviewed-by: Camillo Bruni <cbruni@chromium.org>
Commit-Queue: Victor Gomes <victorgomes@chromium.org>
Cr-Commit-Position: refs/heads/main@{#78091}

src/baseline/baseline-batch-compiler.cc

@@ -56,6 +56,12 @@ class BaselineCompilerTask {
     if (FLAG_print_code) {
       code->Print();
     }
+    // Don't install the code if the bytecode has been flushed or has
+    // already some baseline code installed.
+    if (!shared_function_info_->is_compiled() ||
+        shared_function_info_->HasBaselineCode()) {
+      return;
+    }
     shared_function_info_->set_baseline_code(ToCodeT(*code), kReleaseStore);
     if (V8_LIKELY(FLAG_use_osr)) {
       // Arm back edges for OSR