| commit | 0542355147c5ccd66a3ef0b47932e9df196c5a85 | [log] [tgz] |
|---|---|---|
| author | David Tellenbach <dtellenbach@apple.com> | Tue Aug 19 21:07:16 2025 +0200 |
| committer | GitHub <noreply@github.com> | Tue Aug 19 21:07:16 2025 +0200 |
| tree | 1e6d288a34e9367ee628991147a1da45f6a06091 | |
| parent | 23ea79de614214ab7c434eaa8faf0cc5bc1bd1e7 [diff] |
[AArch64] Fix zero-register copying with zero-cycle moves (#154362)
Fix incorrect super-register lookup when copying from $wzr on subtargets
that lack zero-cycle zeroing but support 64-bit zero-cycle moves.
When copying from $wzr, we used the wrong register class to lookup the
super-register, causing
$w0 = COPY $wzr
to get expanded as
$x0 = ORRXrr $xzr, undef $noreg, implicit $wzr,
rather than the correct
$x0 = ORRXrr $xzr, undef $xzr, implicit $wzr.
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