JDK-8339299 : C1 will miss type profile when inline final method
  • Type: Enhancement
  • Component: hotspot
  • Sub-Component: compiler
  • Affected Version: 24
  • Priority: P4
  • Status: Resolved
  • Resolution: Fixed
  • OS: generic
  • CPU: generic
  • Submitted: 2024-08-30
  • Updated: 2025-06-10
  • Resolved: 2024-09-24
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JDK 24
24 b17Fixed
Related Reports
Causes :  
JDK-8358951 - C2: IntVector.fromMemorySegment does not vectorize with byte[] (performance regression)
Relates :  
JDK-8326369 - Add test to verify bimorphic inlining happens after morphism changes
Relates :  
JDK-8341039 - compiler/cha/TypeProfileFinalMethod.java fails with assertEquals expected: 0 but was: 2
Description
When C1 decide to inline a virtual method based on CHA, it will skip type profile if the method is a final method. And it will prevent C2  to optimize it.
Comments
Changeset: e1c4d303 Branch: master Author: Kuai Wei <kuaiwei.kw@alibaba-inc.com> Date: 2024-09-24 11:08:36 +0000 URL: https://git.openjdk.org/jdk/commit/e1c4d3039f6b5106ce3f65d50f607eacc2a8d168
24-09-2024
A pull request was submitted for review. Branch: master URL: https://git.openjdk.org/jdk/pull/20786 Date: 2024-08-30 07:25:59 +0000
30-08-2024