JDK-8369258 : C2: enable ReassociateInvariants for all loop types
  • Type: Enhancement
  • Component: hotspot
  • Sub-Component: compiler
  • Affected Version: 26
  • Priority: P4
  • Status: Resolved
  • Resolution: Fixed
  • Submitted: 2025-10-07
  • Updated: 2025-12-05
  • Resolved: 2025-10-16
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JDK 26
26 b20Fixed
Related Reports
Duplicate :  
JDK-8326001 - Reassociate binary operators for LongCountedLoops
Duplicate :  
JDK-8365982 - C2 SuperWord: missing RCE / strange Multiversioning with MemorySegment.set
Duplicate :  
JDK-8360204 - C2 SuperWord: missing RCE with MemorySegment.getAtIndex
Relates :  
JDK-8365982 - C2 SuperWord: missing RCE / strange Multiversioning with MemorySegment.set
Relates :  
JDK-8360204 - C2 SuperWord: missing RCE with MemorySegment.getAtIndex
Description
Currently ReassociateInvariants is only enabled for int counted loops. I noticed, enabling it for long counted loops helps RCE. It also seems like something that would help any loop.
Comments
Changeset: ff6a0170 Branch: master Author: Roland Westrelin <roland@openjdk.org> Date: 2025-10-16 07:35:41 +0000 URL: https://git.openjdk.org/jdk/commit/ff6a0170f0ab5cfb4af6d6a4a779451823c486d6
16-10-2025
A pull request was submitted for review. Branch: master URL: https://git.openjdk.org/jdk/pull/27666 Date: 2025-10-07 07:36:41 +0000
07-10-2025