JDK-8173196 : [REDO] C2 does not optimize redundant memory operations with G1
  • Type: Enhancement
  • Component: hotspot
  • Sub-Component: compiler
  • Affected Version: 9,10,11,12,13
  • Priority: P4
  • Status: Resolved
  • Resolution: Fixed
  • Submitted: 2017-01-23
  • Updated: 2019-10-12
  • Resolved: 2019-06-03
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Unresolved : Release in which this issue/RFE will be addressed.
Resolved: Release in which this issue/RFE has been resolved.
Fixed : Release in which this issue/RFE has been fixed. The release containing this fix may be available for download as an Early Access Release or a General Availability Release.

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JDK 13 JDK 14
13 b24Fixed 14Fixed
Related Reports
Relates :  
JDK-8229219 - C2 compilation fails with assert: Bad graph detected in build_loop_late
Relates :  
JDK-8172850 - Anti-dependency on membar causes crash in register allocator due to invalid instruction scheduling
Relates :  
JDK-8087341 - C2 doesn't optimize redundant memory operations with G1
Relates :  
JDK-8229226 - [REDO] C2 does not optimize redundant memory operations with G1
Relates :  
JDK-8173195 - [BACKOUT] 8087341: C2 doesn't optimize redundant memory operations with G1
Description
JDK-8087341 was backed out due to JDK-8172850. We should re-implement the enhancement.
Comments
Hi [~roland], Request your help. Are you planning to get the fix in for this task, for JDK 11? If not, can you please change the 'Fix Version' to tbd_feature or tbd_update. Thank you.
03-05-2018
Prototype fix for JDK-8172850: http://cr.openjdk.java.net/~thartmann/8172850/v1/webrev.00/
23-01-2017