8279622: C2: miscompilation of map pattern as a vector reduction

[GoeLin]

I backport this for parity with 11.0.17-oracle.

Clean backport from 17.

---

Progress

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

Issue

• JDK-8279622: C2: miscompilation of map pattern as a vector reduction

Reviewing

Using git

Checkout this PR locally:
$ git fetch https://git.openjdk.org/jdk11u-dev pull/1194/head:pull/1194
$ git checkout pull/1194

Update a local copy of the PR:
$ git checkout pull/1194
$ git pull https://git.openjdk.org/jdk11u-dev pull/1194/head

Using Skara CLI tools

Checkout this PR locally:
$ git pr checkout 1194

View PR using the GUI difftool:
$ git pr show -t 1194

Using diff file

Download this PR as a diff file:
https://git.openjdk.org/jdk11u-dev/pull/1194.diff

[bridgekeeper]

👋 Welcome back goetz! 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.

[openjdk]

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

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

8279622: C2: miscompilation of map pattern as a vector reduction

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 no new commits pushed to the master branch. If another commit should be pushed before you perform the /integrate command, your PR will be automatically rebased. If you prefer to avoid any potential automatic rebasing, please check the documentation for the /integrate command for further details.

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[mlbridge]

Webrevs

• 00: Full (39e531ec)

[GoeLin]

/integrate

[openjdk]

Going to push as commit 4f1ac63.
Since your change was applied there have been 10 commits pushed to the master branch:

• 1e7ff48: 8289477: Memory corruption with CPU_ALLOC, CPU_FREE on muslc
• 7a076e4: 8247964: All log0() in com/sun/org/slf4j/internal/Logger.java should be private
• 290a7e3: 8247907: XMLDsig logging does not work
• 3a0013f: 8219074: [TESTBUG] runtime/containers/docker/TestCPUAwareness.java typo of printing parameters (period should be shares)
• 32babc1: 8281181: Do not use CPU Shares to compute active processor count
• 4b2e41c: 8277893: Arraycopy stress tests
• 6ecce29: 8287672: jtreg test com/sun/jndi/ldap/LdapPoolTimeoutTest.java fails intermittently in nightly run
• 9b73adb: 8285820: C2: LCM prioritizes locally dependent CreateEx nodes over projections after 8270090
• bf08f88: 8270090: C2: LCM may prioritize CheckCastPP nodes over projections
• 732d9bc: 8215291: Broken links when generating from project without modules

Your commit was automatically rebased without conflicts.

[openjdk]

@GoeLin Pushed as commit 4f1ac63.

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