RFR: 8249893: AARCH64: optimize the construction of the value from the bits of the other two

[Boris Ulasevich]

On Thu, 5 Nov 2020 09:52:28 GMT, Andrew Dinn <adinn at openjdk.org> wrote:

>  why you need to delay application of this transform to a new post-loops optimization stage

Unfortunately, BitfieldInsert transformation conflicts with vectorization:
- if or/and/shift was converted to BFI it is no longer vectorized
- vectorized or/and/shift operations are faster than BFI

I delayed my transformation to be sure loop and vectorization transformations is already done at the moment.

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PR: https://git.openjdk.java.net/jdk/pull/511