8252299: [lworld] C2 compilation fails with assert(!use_ReduceInitialCardMarks()) failed: can only happen with card marking

[TobiHartmann]

When replacing an inline type buffer allocation by a dominating allocation, we are removing stores and re-link all users of the dominated allocation to the dominating one (see InlineTypeNode::replace_allocation). Now we forgot to also remove GC barriers for initializing stores to the dominated allocation, which causes several issues because these are then re-linked to the dominated allocation as well while the corresponding stores were removed. The fix is to simply remove these barriers as well via BarrierSet::eliminate_gc_barrier.

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Progress

• Change must not contain extraneous whitespace

Issue

• JDK-8252299: [lworld] C2 compilation fails with assert(!use_ReduceInitialCardMarks()) failed: can only happen with card marking

Download

$ git fetch https://git.openjdk.java.net/valhalla pull/166/head:pull/166
$ git checkout pull/166

[bridgekeeper]

👋 Welcome back thartmann! A progress list of the required criteria for merging this PR into lworld will be added to the body of your pull request.

[openjdk]

@TobiHartmann This change now passes all automated pre-integration checks, type /integrate in a new comment to proceed. After integration, the commit message will be:

8252299: [lworld] C2 compilation fails with assert(!use_ReduceInitialCardMarks()) failed: can only happen with card marking

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Since the source branch of this PR was last updated there have been 2 commits pushed to the lworld branch:

• acfed88: 8252061: [lword] Support Object::toString for inline type
• bce51c9: 8244713: [lworld] V.ref class should not inadvertently carry over attributes from V.class

As there are no conflicts, your changes will automatically be rebased on top of these commits when integrating. If you prefer to avoid automatic rebasing, please merge lworld into your branch, and then specify the current head hash when integrating, like this: /integrate acfed88167d4f6228802af8fcffdd54b58817689.

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

[mlbridge]

Webrevs

• 00: Full (6d579b0)

[TobiHartmann]

/integrate

[openjdk]

@TobiHartmann The following commits have been pushed to lworld since your change was applied:

• acfed88: 8252061: [lword] Support Object::toString for inline type
• bce51c9: 8244713: [lworld] V.ref class should not inadvertently carry over attributes from V.class

Your commit was automatically rebased without conflicts.

Pushed as commit 54b5410.