8261022: Fix incorrect result of Math.abs() with char type

[kvergizova]

I'd like to backport JDK-8261022 to 13u for parity with 11u.
The patch applies cleanly, but requires some modification due to absence of VectorNode::is_shift_opcode in 13u (JDK-8257625 is not in 13u), replaced by similar VectorNode::is_shift.
Tested with tier1; new test fails without the patch, passes with it.

---

Progress

• Change must not contain extraneous whitespace
• Commit message must refer to an issue
• Change must be properly reviewed

Issue

• JDK-8261022: Fix incorrect result of Math.abs() with char type

Reviewers

• Yuri Nesterenko (@yan-too - Reviewer)

Download

To checkout this PR locally:
$ git fetch https://git.openjdk.java.net/jdk13u-dev pull/152/head:pull/152
$ git checkout pull/152

To update a local copy of the PR:
$ git checkout pull/152
$ git pull https://git.openjdk.java.net/jdk13u-dev pull/152/head

[bridgekeeper]

👋 Welcome back evergizova! A progress list of the required criteria for merging this PR into master will be added to the body of your pull request. There are additional pull request commands available for use with this pull request.

[openjdk]

This backport pull request has now been updated with issue from the original commit.

[mlbridge]

Webrevs

• 00: Full (6f5c520)

[openjdk]

@kvergizova This change now passes all automated pre-integration checks.

After integration, the commit message for the final commit will be:

8261022: Fix incorrect result of Math.abs() with char type

Reviewed-by: yan

You can use pull request commands such as /summary, /contributor and /issue to adjust it as needed.

At the time when this comment was updated there had been 3 new commits pushed to the master branch:

• a117b8b: 8263425: AArch64: two potential bugs in C1 LIRGenerator::generate_address()
• ebea17d: 8255625: AArch64: Implement Base64.encodeBlock accelerator/intrinsic
• 5850c58: 8257414: Drag n Drop target area is wrong on high DPI systems

Please see this link for an up-to-date comparison between the source branch of this pull request and the master branch.
As there are no conflicts, your changes will automatically be rebased on top of these commits when integrating. If you prefer to avoid this automatic rebasing, please check the documentation for the /integrate command for further details.

➡️ To integrate this PR with the above commit message to the master branch, type /integrate in a new comment.

[kvergizova]

/integrate

[openjdk]

@kvergizova Since your change was applied there have been 3 commits pushed to the master branch:

• a117b8b: 8263425: AArch64: two potential bugs in C1 LIRGenerator::generate_address()
• ebea17d: 8255625: AArch64: Implement Base64.encodeBlock accelerator/intrinsic
• 5850c58: 8257414: Drag n Drop target area is wrong on high DPI systems

Your commit was automatically rebased without conflicts.

Pushed as commit ff29b0b.

💡 You may see a message that your pull request was closed with unmerged commits. This can be safely ignored.