v8/test/mjsunit/baseline/flush-only-baseline-code.js

// Copyright 2021 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.

// Flags: --expose-gc --stress-flush-code --allow-natives-syntax
// Flags: --baseline-batch-compilation-threshold=0 --sparkplug
// Flags: --no-always-sparkplug --lazy-feedback-allocation
// Flags: --flush-baseline-code --no-flush-bytecode --no-turbofan --no-maglev
// Flags: --no-stress-concurrent-inlining
// Flags: --no-concurrent-sparkplug

function HasBaselineCode(f) {
  let opt_status = %GetOptimizationStatus(f);
  return (opt_status & V8OptimizationStatus.kBaseline) !== 0;
}

function HasByteCode(f) {
  let opt_status = %GetOptimizationStatus(f);
  return (opt_status & V8OptimizationStatus.kInterpreted) !== 0;
}

var x = {b:20, c:30};
function f() {
  return x.b + 10;
}

// Test bytecode gets flushed
f();
assertTrue(HasByteCode(f));
gc();
assertTrue(HasByteCode(f));

// Test baseline code gets flushed but not bytecode.
for (i = 1; i < 50; i++) {
  f();
}
assertTrue(HasBaselineCode(f));
gc();
assertFalse(HasBaselineCode(f));
assertTrue(HasByteCode(f));

// Check baseline code and bytecode aren't flushed if baseline code is on
// stack.
function f2(should_recurse) {
  if (should_recurse) {
    assertTrue(HasBaselineCode(f2));
    f2(false);
    gc();
    assertTrue(HasBaselineCode(f2));
  }
  return x.b + 10;
}

for (i = 1; i < 50; i++) {
  f2(false);
}
assertTrue(HasBaselineCode(f2));
// Recurse with baseline code on stack
f2(true);