Integrated: 8323083: [GenShen] Alloca avoidance, const-safety, interface decluttering in promotion budgeting

[William Kemper]

On Fri, 12 Jan 2024 21:54:57 GMT, William Kemper <wkemper at openjdk.org> wrote:

> 8323083: [GenShen] Alloca avoidance, const-safety, interface decluttering in promotion budgeting

This pull request has now been integrated.

Changeset: d0a3e816
Author:    William Kemper <wkemper at openjdk.org>
URL:       https://git.openjdk.org/shenandoah-jdk21u/commit/d0a3e816f7d492d14bf655157883f99164274567
Stats:     164 lines in 6 files changed: 91 ins; 26 del; 47 mod

8323083: [GenShen] Alloca avoidance, const-safety, interface decluttering in promotion budgeting

In code related to the computation of promotion budgets and region preselection for promotion:

1. avoid alloca, instead encapsulating region preselection using RAII pattern
2. const-safety and some additional asserts related to 1
3. declutter some method interfaces
4. expand some documentation comments

Backport-of: 6cd8d04f283b1d0e65f40f816ccb10b9be59717c

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PR: https://git.openjdk.org/shenandoah-jdk21u/pull/11