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Type: Enhancement
Resolution: Fixed
Priority: P4
Fix Version/s: 26
Affects Version/s: 25
Component/s: hotspot
Labels:
- c2
- performance
- vectorapi

Subcomponent:
compiler
Resolved In Build:
b16

Patterns like `VectorMask.not(a.compare(VectorOperators.EQ, b))` can be optimized to `a.compare(VectorOperators.NE, b)`, which saves the `not` operation. This transformation can apply for all architectures.

causes

JDK-8368205 [TESTBUG] VectorMaskCompareNotTest.java crashes when MaxVectorSize=8

Resolved

relates to

JDK-8368206 RISC-V: compiler/vectorapi/VectorMaskCompareNotTest.java fails when running without RVV

Resolved

JDK-8369511 PPC64: compiler/vectorapi/VectorMaskCompareNotTest.java fails when running without VectorRegisters

Closed

links to

Commit(master) openjdk/jdk/45cc515f

Review(master) openjdk/jdk/24674

Assignee:: Xiaohong Gong

Reporter:: Xiaohong Gong

Votes:: 0 Vote for this issue

Watchers:: 4 Start watching this issue

Created:: 2025-04-09 18:33

Updated:: 2025-10-09 08:18

Resolved:: 2025-09-17 00:33

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