FULL PRODUCT VERSION :
java version "1.6.0_14"
Java(TM) SE Runtime Environment (build 1.6.0_14-b08)
Java HotSpot(TM) 64-Bit Server VM (build 14.0-b16, mixed mode)


FULL OS VERSION :
Linux server 2.6.29-gentoo-r5 #3 SMP PREEMPT Sat May 30 18:31:37 CEST 2009 x86_64 AMD Athlon(tm) 64 X2 Dual Core Processor 4600+ AuthenticAMD GNU/Linux


A DESCRIPTION OF THE PROBLEM :
x is supposed to be identical for both loops. And is if max = Integer.MAX_VALUE-1:

238
2147483646
268
2147483646

But it's not if max=Integer.MAX_VALUE-0:

284
2147483635
205
2147483632

This appears to be a bug in jdk6u14 on amd64 only.


public class Loop
{
        public static void main( String[] args )
        {
                int max = Integer.MAX_VALUE;
                long x=0l;
                long t0,t1;

                t0 = System.currentTimeMillis();
                for(int i = 0; i < Math.max( 0,max); i++){
                                x++;
                }

                t1 = System.currentTimeMillis();

                System.out.println(t1-t0);
                System.out.println(x);

                x =0;
                t0 = System.currentTimeMillis();
                for(int i = 0, a = Math.max(0,max); i < a; i++){
                        x++;
                }

                t1 = System.currentTimeMillis();
               
                System.out.println(t1-t0);
                System.out.println(x);
               
        }
}



THE PROBLEM WAS REPRODUCIBLE WITH -Xint FLAG: Did not try

THE PROBLEM WAS REPRODUCIBLE WITH -server FLAG: Did not try

REPRODUCIBILITY :
This bug can be reproduced always.