| commit | c3f01f13b10d708b9b7ff45a6ccc2f0c3462b3af | [log] [tgz] |
|---|---|---|
| author | Noah Goldstein <goldstein.w.n@gmail.com> | Sun Apr 09 19:23:26 2023 -0500 |
| committer | Noah Goldstein <goldstein.w.n@gmail.com> | Mon Apr 10 00:16:57 2023 -0500 |
| tree | cb63181bfc8242f4dedeb6e0ac132f21efb88bb5 | |
| parent | 2ce1698a343c599910bceed399ca7020816b230e [diff] |
[X86] Add inst fixup for `unpckpd` -> `unpckqdq`. `unpckqdq` seems to be treated as a shuffle from bypass delay perspective (which makes sense it appears to have shared shuffle units for all micro-arch). `unpckqdq` is slightly preferable to `shufpd` as it saves 1-byte of code size and can be used to replace the micro-fused `rm` version. So, if the target has no bypass delay, we should do `unpckpd` -> `unpckqdq` instead of `shufpd. Reviewed By: pengfei Differential Revision: https://reviews.llvm.org/D147728
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