RFR: 8250269: Replace ATTRIBUTE_ALIGNED with alignas [v4]
Julian Waters
jwaters at openjdk.org
Fri Dec 16 15:36:21 UTC 2022
> C++11 added the alignas attribute, for the purpose of specifying alignment on types, much like compiler specific syntax such as gcc's __attribute__((aligned(x))) or Visual C++'s __declspec(align(x)).
>
> We can phase out the use of the macro in favor of the standard attribute. In the meantime, we can replace the toolchain specific definitions of ATTRIBUTE_ALIGNED with a portable definition. We might deprecate the use of the macro but changing its implementation quickly and cleanly applies the feature where the macro is being used.
>
> Note: With certain parts of HotSpot using ATTRIBUTE_ALIGNED so indiscriminately, this commit will likely take some time to get right
>
> This will require adding the alignas attribute to the list of language features approved for use in HotSpot code. (Ongoing at [8297912](https://github.com/openjdk/jdk/pull/11446))
Julian Waters has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains three additional commits since the last revision:
- Merge branch 'openjdk:master' into alignas
- Merge branch 'openjdk:master' into alignas
- alignas
-------------
Changes:
- all: https://git.openjdk.org/jdk/pull/11431/files
- new: https://git.openjdk.org/jdk/pull/11431/files/e617e5cb..1d69a46f
Webrevs:
- full: https://webrevs.openjdk.org/?repo=jdk&pr=11431&range=03
- incr: https://webrevs.openjdk.org/?repo=jdk&pr=11431&range=02-03
Stats: 70360 lines in 1214 files changed: 39489 ins; 23580 del; 7291 mod
Patch: https://git.openjdk.org/jdk/pull/11431.diff
Fetch: git fetch https://git.openjdk.org/jdk pull/11431/head:pull/11431
PR: https://git.openjdk.org/jdk/pull/11431
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