JDK-8298952 : All nodes should have type(n) == Value(n) after IGVN
  • Type: Enhancement
  • Component: hotspot
  • Sub-Component: compiler
  • Affected Version: 21
  • Priority: P4
  • Status: Resolved
  • Resolution: Fixed
  • Submitted: 2022-12-16
  • Updated: 2025-11-10
  • Resolved: 2023-02-06
The Version table provides details related to the release that this issue/RFE will be addressed.

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.

To download the current JDK release, click here.
JDK 21
21 b09Fixed
Related Reports
Relates :  
JDK-8318049 - C2: assert(!failure) failed: Missed optimization opportunity in PhaseIterGVN
Relates :  
JDK-8320909 - C2: Adapt IGVN's enqueuing logic to match idealization of AndNode with LShift operand
Relates :  
JDK-8371581 - CTW: PhaseCCP not at fixpoint: analysis result may be unsound
Relates :  
JDK-8298951 - Umbrella: improve CCP and IGVN verification
Relates :  
JDK-8316361 - C2: assert(!failure) failed: Missed optimization opportunity in PhaseIterGVN with -XX:VerifyIterativeGVN=10
Relates :  
JDK-8343131 - Add -XX:VerifyIterativeGVN=10 to CTW
Relates :  
JDK-8357805 - C2: OpaqueDelayNode: arbitrarily delay IGVN optimizations
Relates :  
JDK-8347273 - C2: VerifyIterativeGVN for Ideal and Identity
Relates :  
JDK-8335866 - C2 compilation fails with "Missed optimization opportunity in PhaseIterGVN"
Description
Consider exceptions where that is not feasible.
Reuse/refactor code from JDK-8257197.
Comments
Changeset: 8f195ff2 Author: Emanuel Peter <epeter@openjdk.org> Date: 2023-02-06 08:45:48 +0000 URL: https://git.openjdk.org/jdk/commit/8f195ff236000d9c019f8beb2b13355083e211b5
06-02-2023
Commit 11 performance testing successful, no significat change in runtime (One might have been worried about all the small fixes changing the runtime of the product build. Of course the verification code can change the runtime, but that is not enabled in product build.)
30-01-2023
A pull request was submitted for review. URL: https://git.openjdk.org/jdk/pull/11775 Date: 2022-12-23 12:11:12 +0000
26-01-2023