8290451: Incorrect result when switching to C2 OSR compilation from C1

[TobiHartmann]

Backport of JDK-8290451. Applies cleanly. Approval is pending.

Thanks,
Tobias

---

Progress

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Issue

• JDK-8290451: Incorrect result when switching to C2 OSR compilation from C1

Reviewing

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Checkout this PR locally:
$ git fetch https://git.openjdk.org/jdk19u pull/32/head:pull/32
$ git checkout pull/32

Update a local copy of the PR:
$ git checkout pull/32
$ git pull https://git.openjdk.org/jdk19u pull/32/head

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Checkout this PR locally:
$ git pr checkout 32

View PR using the GUI difftool:
$ git pr show -t 32

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Download this PR as a diff file:
https://git.openjdk.org/jdk19u/pull/32.diff

[bridgekeeper]

👋 Welcome back thartmann! 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]

@TobiHartmann 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:

8290451: Incorrect result when switching to C2 OSR compilation from C1

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[mlbridge]

Webrevs

• 00: Full (d2721826)

[TobiHartmann]

/integrate

[openjdk]

Going to push as commit 27158f2.
Since your change was applied there have been 10 commits pushed to the master branch:

• 83cb884: 8290711: assert(false) failed: infinite loop in PhaseIterGVN::optimize
• 63c53da: 8290705: StringConcat::validate_mem_flow asserts with "unexpected user: StoreI"
• 6b9fe5d: 8293044: C1: Missing access check on non-accessible class
• e8a134a: 8291775: C2: assert(r != __null && r->is_Region()) failed: this phi must have a region
• a8ca05c: 8291599: Assertion in PhaseIdealLoop::skeleton_predicate_has_opaque after JDK-8289127
• 058507f: 8290781: Segfault at PhaseIdealLoop::clone_loop_handle_data_uses
• 83d0573: 8292756: java.lang.AssertionError at at jdk.compiler/com.sun.tools.javac.code.Scope$ScopeImpl.leave(Scope.java:386)
• 88490ec: 8293348: A false cyclic inheritance error reported
• b5f7988: 8293578: Duplicate ldc generated by javac
• 66bc356: 8293100: RISC-V: Need to save and restore callee-saved FloatRegisters in StubGenerator::generate_call_stub

Your commit was automatically rebased without conflicts.

[openjdk]

@TobiHartmann Pushed as commit 27158f2.

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