8279833: Loop optimization issue in String.encodeUTF8_UTF16

[GoeLin]

I backport this for parity with 17.0.3-oracle.

---

Progress

• Change must not contain extraneous whitespace
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Issue

• JDK-8279833: Loop optimization issue in String.encodeUTF8_UTF16

Reviewing

Using git

Checkout this PR locally:
$ git fetch https://git.openjdk.java.net/jdk17u-dev pull/97/head:pull/97
$ git checkout pull/97

Update a local copy of the PR:
$ git checkout pull/97
$ git pull https://git.openjdk.java.net/jdk17u-dev pull/97/head

Using Skara CLI tools

Checkout this PR locally:
$ git pr checkout 97

View PR using the GUI difftool:
$ git pr show -t 97

Using diff file

Download this PR as a diff file:
https://git.openjdk.java.net/jdk17u-dev/pull/97.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.

ℹ️ This project also has non-automated pre-integration requirements. Please see the file CONTRIBUTING.md for details.

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

8279833: Loop optimization issue in String.encodeUTF8_UTF16

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[mlbridge]

Webrevs

• 00: Full (0265943e)

[GoeLin]

/integrate

[openjdk]

Going to push as commit 69d296d.
Since your change was applied there have been 10 commits pushed to the master branch:

• 6f644e0: 8273277: C2: Move conditional negation into rc_predicate
• d1d0b08: 8279412: [JVMCI] failed speculations list must outlive any nmethod that refers to it
• 3354244: 8271202: C1: assert(false) failed: live_in set of first block must be empty
• e965881: 8263567: gtests don't terminate the VM safely
• e92b2bc: 8269206: A small typo in comment in test/lib/sun/hotspot/WhiteBox.java
• 84457e5: 8278309: [windows] use of uninitialized OSThread::_state
• 78e2153: 8274506: TestPids.java and TestPidsLimit.java fail with podman run as root
• fc92adc: 8276764: Enable deterministic file content ordering for Jar and Jmod
• 0130fdc: 8273967: gtest os.dll_address_to_function_and_library_name_vm fails on macOS12
• 4b5b58d: 8273366: [testbug] javax/swing/UIDefaults/6302464/bug6302464.java fails on macOS12

Your commit was automatically rebased without conflicts.

[openjdk]

@GoeLin Pushed as commit 69d296d.

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