Integrated: 8374518: C1: Remove dead LinearScanStatistic::Counter::counter_fpu_stack

[Christian Hagedorn]

On Mon, 5 Jan 2026 13:28:41 GMT, Christian Hagedorn <chagedorn at openjdk.org> wrote:

> The usages of `LinearScanStatistic::Counter::counter_fpu_stack` were removed with [JDK-8351156](https://bugs.openjdk.org/browse/JDK-8351156) when the FPU stack support was removed. But the definition in the `Counter` enum was missed to clean up. When now printing the counters with `-XX:+CountLinearScan -XX:+CITime`, we reach a `ShouldNotReach` in `LinearScanStatistic::counter_name()` for `Counter::counter_fpu_stack` because there is no longer an entry there - it's dead.
> 
> I added a simple hello world sanity test that runs with `-XX:+CountLinearScan -XX:+CITime`.
> 
> Thanks,
> Christian

This pull request has now been integrated.

Changeset: 938bbd5b
Author:    Christian Hagedorn <chagedorn at openjdk.org>
URL:       https://git.openjdk.org/jdk/commit/938bbd5b604e990514b64a0451ed1bceb07eb23b
Stats:     39 lines in 2 files changed: 37 ins; 1 del; 1 mod

8374518: C1: Remove dead LinearScanStatistic::Counter::counter_fpu_stack

Reviewed-by: thartmann, mdoerr

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PR: https://git.openjdk.org/jdk/pull/29037