RFR (XS): 8004867: VM crashing with assert "share/vm/opto/node.hpp:357 - assert(i < _max) failed: oob"

[Vladimir Kozlov]

Thanks, Christian

Vladimir

On 2/14/13 11:50 AM, Christian Thalinger wrote:
> Looks good.  -- Chris
>
> On Feb 13, 2013, at 7:48 PM, Vladimir Kozlov <vladimir.kozlov at oracle.com> wrote:
>
>> http://cr.openjdk.java.net/~kvn/8004867/webrev/
>>
>> Superword code in SuperWord::mem_slice_preds() does not expect SCMemProj nodes on memory path. These nodes came from AtomicLong.attemptUpdate intrinsic. The intrinsic was removed in jdk7u14 and jdk8 and the problem is not reproduced with latest sources because the remaining usages of LoadStore/SCMemProj nodes are guarded by membars (for example, inline_unsafe_load_store intrinsics). Loops with membars, safepoints and control nodes are not vectorized by superword optimization.
>>
>> Added few checks and early bailout from Superword optimization to avoid such cases in a future.
>>
>> Added several jtreg tests for unsafe and atomic operations in unrolled loops.
>>
>> Ran all compiler regression tests, ctw and JPRT with -rtests.
>>
>> Thanks,
>> Vladimir
>>
>>
>>
>>
>