| commit | d3f6a88a1fb36f94c71940514e576821c6cc3ade | [log] [tgz] |
|---|---|---|
| author | Sander de Smalen <sander.desmalen@arm.com> | Wed Apr 24 16:48:28 2024 +0100 |
| committer | GitHub <noreply@github.com> | Wed Apr 24 16:48:28 2024 +0100 |
| tree | 52b3fb27e53e4f2bb5b7dd4aecc1df3309e630d6 | |
| parent | 7c0da7993ecfffe1396a15383eb357fa624265af [diff] |
[AArch64] Unify lowering logic for fixed-length vectors. (#89393) In preparation of decoupling codegen for SME from SVE, this patch does a bit of cleanup to unify the logic around calling 'addTypeForFixedLengthSVE'. We only want to call this function when: * We have access to both SVE and NEON, but we prefer to use SVE. * We have access to SVE, but there is no access to NEON. Inside 'addTypeForFixedLengthSVE', we normally use Custom lowering for all operations so they can be converted to/from scalable vector operations. However, there are some exceptions: * For 64/128bit vector loads/stores we prefer the AdvSIMD LDR/STR D/Q-reg instructions, since these are available in Streaming-SVE mode. * For some operations like gather/scatter, we can only use SVE if the full set of SVE instructions is available (as opposed to the streaming[-compatible] subset). Otherwise, these operations need to expand (scalarise)
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