The attached fuzzer test produces a different result for C2 compared to C1/interpreter.

To reproduce:
$ java -Xint Test.java > Xint.log
$ java -Xmx1G -Xcomp -Xbatch -XX:-TieredCompilation -XX:CompileOnly=Test Test.java > c2.log

$ diff Xint.log c2.log
7c7
< vMeth1_check_sum: 4635247489541481754
---
> vMeth1_check_sum: 4635247489541481753
16c16
< vMeth1_check_sum: -9176249094203243722
---
> vMeth1_check_sum: -9176249094203243723
25c25
< vMeth1_check_sum: -4541001604881528878
---
> vMeth1_check_sum: -4541001604881528879
34c34
< vMeth1_check_sum: 94245884440185966
---
> vMeth1_check_sum: 94245884440185965
43c43
< vMeth1_check_sum: 4729493373761900810
---
> vMeth1_check_sum: 4729493373761900809
52c52
< vMeth1_check_sum: -9082003210625935962
---
> vMeth1_check_sum: -9082003210625935963
61c61
< vMeth1_check_sum: -4446755721304221118
---
> vMeth1_check_sum: -4446755721304221119
70c70
< vMeth1_check_sum: 188491768017493726
---
> vMeth1_check_sum: 188491768017493725
79c79
< vMeth1_check_sum: 4823739257339208570
---
> vMeth1_check_sum: 4823739257339208569
88c88
< vMeth1_check_sum: -8987757327048628202
---
> vMeth1_check_sum: -8987757327048628203