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Type: Enhancement
Resolution: Fixed
Priority: P4
Fix Version/s: 20
Affects Version/s: 20
Component/s: hotspot
Labels:
- c2
- performance

Subcomponent:
compiler
Resolved In Build:
b17
CPU:

generic
OS:

generic

After ~~JDK-8139340~~ and ~~JDK-8192846~~, vector conditional move was supported on x86. But the work flow is broken in the latest JDK. Also, no codegen rules for CMoveVF/CMoveVD in the aarch64 backend. The task is to fix and re-enable vector conditional move on x86 and support it on aarch64 as well.

relates to

JDK-8295407 C2 crash: Error: ShouldNotReachHere() in multiple vector tests with -XX:-MonomorphicArrayCheck -XX:-UncommonNullCast

Resolved

JDK-8306302 C2 Superword fix: use VectorMaskCmp and VectorBlend instead of CMoveVF/D

Resolved

JDK-8293833 Error mixing types with -XX:+UseCMoveUnconditionally -XX:+UseVectorCmov

Resolved

links to

Commit openjdk/jdk/aa48705d

Review openjdk/jdk/9652

Assignee:: Fei Gao

Reporter:: Fei Gao

Votes:: 0 Vote for this issue

Watchers:: 5 Start watching this issue

Created:: 2022-06-28 19:27

Updated:: 2023-04-18 08:39

Resolved:: 2022-09-26 18:26

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