> Hi all,
>
> Vector API fails to work when:
> - case 1: MaxVectorSize is set to <=8, or
> - case 2: C2 is disabled
>
> The reason is that {max/preferred} VectorShape initialization fails in both
> cases.
> And the root cause is that VectorSupport_GetMaxLaneCount [1] returns
> unreasonable values (0 for case 1 and -1 for case 2).
>
> Vector API should not depend on C2 to run.
> It should work even there is no JIT compiler since it's a Java-level api.
> So let's fix it.
>
> Testing:
> - jdk/incubator/vector with -XX:MaxVectorSize=default/8 on Linux/x64
>
> Thanks.
> Best regards,
> Jie
>
> [1]
> https://github.com/openjdk/jdk/blob/master/src/hotspot/share/prims/vectorSupport.cpp#L364
Jie Fu has updated the pull request with a new target base due to a merge or a
rebase. The incremental webrev excludes the unrelated changes brought in by the
merge/rebase. The pull request contains seven additional commits since the last
revision:
- Fix in jdk/incubator/vector/VectorShape.java
- Merge branch 'master' into JDK-8262096
- Revert changes
- Remove -XX:TieredStopAtLevel=3
- Update the jtreg test
- The numerator should be 8 (byte)
- 8262096: Vector API fails to work due to VectorShape initialization exception
-------------
Changes:
- all: https://git.openjdk.java.net/jdk/pull/2722/files
- new: https://git.openjdk.java.net/jdk/pull/2722/files/bbe6150c..b67b232d
Webrevs:
- full: https://webrevs.openjdk.java.net/?repo=jdk&pr=2722&range=04
- incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=2722&range=03-04
Stats: 7047 lines in 380 files changed: 3707 ins; 1675 del; 1665 mod
Patch: https://git.openjdk.java.net/jdk/pull/2722.diff
Fetch: git fetch https://git.openjdk.java.net/jdk pull/2722/head:pull/2722
PR: https://git.openjdk.java.net/jdk/pull/2722
