JDK-8301630 : C2: 8297933 broke type speculation in some cases
  • Type: Bug
  • Component: hotspot
  • Sub-Component: compiler
  • Affected Version: 21
  • Priority: P4
  • Status: Resolved
  • Resolution: Fixed
  • Submitted: 2023-02-01
  • Updated: 2023-03-28
  • Resolved: 2023-03-01
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JDK 21
21 b12Fixed
Related Reports
Relates :  
JDK-8297933 - [REDO] Compiler should only use verified interface types for optimization
Description
While merging 8297933 in the valhalla, a test there failed because 8297933 broke type speculation.
Comments
Changeset: 6b07243f Author: Roland Westrelin <roland@openjdk.org> Date: 2023-03-01 09:36:22 +0000 URL: https://git.openjdk.org/jdk/commit/6b07243f5671f148166f027796f620bad9b38f73
01-03-2023
ILW = Possible performance loss due to broken type speculation, medium?, no workaround = MMH = P3
02-02-2023
A pull request was submitted for review. URL: https://git.openjdk.org/jdk/pull/12368 Date: 2023-02-01 16:55:01 +0000
02-02-2023