JDK-8273868 : Add IR tests for JDK-8273021
  • Type: Enhancement
  • Component: hotspot
  • Sub-Component: compiler
  • Affected Version: 18
  • Priority: P4
  • Status: Closed
  • Resolution: Duplicate
  • Submitted: 2021-09-16
  • Updated: 2025-08-04
  • Resolved: 2025-08-04
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Related Reports
Blocks :  
JDK-8267265 - Use new IR Test Framework to create tests for C2 Ideal transformations
Duplicate :  
JDK-8279607 - Existing optimization "~x+1" -> "-x" can be generalized to "~x+c" -> "(c-1)-x".
Relates :  
JDK-8273021 - C2: Improve Add and Xor ideal optimizations
Description
We should add IR tests for JDK-8273021 to verify the correctness of the IR transformations
Comments
Closing as duplicate of JDK-8279607 as it generalizes the original optimization and includes the relevant IR tests
04-08-2025
Great! That makes sense, thank you Yi!
16-09-2021
I'm glad to do so~ I will add an IR verification test after JDK-8267265 is merged.
16-09-2021
Hi [~yyang], assigned this to you als follow-up to JDK-8273021. Could you also provide IR tests for the new transformations?
16-09-2021