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/**
 * @test
 * @bug 8148490
 * @summary Test correct saving and restoring of vector registers at safepoints.
 * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -Xbatch -XX:-TieredCompilation -XX:CompileCommand=exclude,TestRegisterRestoring::main -XX:+SafepointALot TestRegisterRestoring
 */
public class TestRegisterRestoring {
  public static void main(String args[]) throws Exception {
    // Initialize
    float[] array = new float[100];
    for (int i = 0; i < array.length; ++i) {
      array[i] = 0;
    }
    // Test
    for (int j = 0; j < 20_000; ++j) {
      increment(array);
      // Check result
      for (int i = 0; i < array.length; i++) {
        if (array[i] != 10_000) {
          throw new RuntimeException("Test failed: array[" + i + "] = " + array[i] + " but should be 10.000");
        }
        array[i] = 0;
      }
    }
  }

  static void increment(float[] array) {
    // Loop with safepoint
    for (long l = 0; l < 10_000; l++) {
      // Vectorized loop
      for (int i = 0; i < array.length; ++i) {
        array[i] += 1;
      }
    }
  }
}