[jdk21u-dev] RFR: 8320379: C2: Sort spilling/unspilling sequence for better ld/st merging into ldp/stp on AArch64

[Andrew Haley]

On Tue, 4 Jun 2024 21:53:56 GMT, Xiaolong Peng <duke at openjdk.org> wrote:

> Backport JDK-8320379: C2: Sort spilling/unspilling sequence for better ld/st merging into ldp/stp on AArch64
> 
> ### Validation
> 
> Tested on AWS Graviton instance by running ```JTREG_KEYWORDS="!headful & !external-dep & !printer" make test TEST=all```, same the test for PR on jdk17, only saw few test failures in CAInterop.java and compiler/intrinsics. 
> 
> - CAInterop tests are known intermittently failing tests, it should be fine to ignore. 
> - The test failures from compiler/intrinsics has error message "Option 'UseSHA3Intrinsics' is expected to have 'true' value Option 'UseSHA3Intrinsics' should be enabled by default", it seems a bug but not related to the backport, will follow up we need to create a bug.

Did you submit a jdk22 backport request?

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PR Comment: https://git.openjdk.org/jdk21u-dev/pull/665#issuecomment-2151736510