[16] RFR(XS): 8248467: C2: compiler/intrinsics/object/TestClone fails with -XX:+VerifyGraphEdges

[Vladimir Kozlov]

Good.

Thanks,
Vladimir

On 7/15/20 8:04 AM, Christian Hagedorn wrote:
> Hi
> 
> Please review the following patch:
> https://bugs.openjdk.java.net/browse/JDK-8248467
> http://cr.openjdk.java.net/~chagedorn/8248467/webrev.00/
> 
> The assertion is hit due to a MemBarNode whose precedence edge was set to NULL at [1] (result_phi_rawoop is NULL and 
> _resproj is the precedence edge to a MemBarStoreStore). This is possible since JDK-8237581 [2] which can remove some 
> allocations. The fix just adds this additional case in the assert.
> 
> Best regards,
> Christian
> 
> 
> [1] http://hg.openjdk.java.net/jdk/jdk/file/4a8fd81d64ba/src/hotspot/share/opto/macro.cpp#l1566
> [2] https://bugs.openjdk.java.net/browse/JDK-8237581