| commit | aef0e77c76e3fb810852f3d0c79cc4daae52f67e | [log] [tgz] |
|---|---|---|
| author | Simon Pilgrim <llvm-dev@redking.me.uk> | Tue Nov 05 14:42:15 2024 +0000 |
| committer | GitHub <noreply@github.com> | Tue Nov 05 14:42:15 2024 +0000 |
| tree | a35422e6ae1fa6d1290f157368dd8c9f6977bf1e | |
| parent | d7979c111ef80f77d1e04b1f49538f8946fe8f5f [diff] |
[DAG] visitAND - Fold (and (srl X, C), 1) -> (srl X, BW-1) for signbit extraction (#114992) If we're masking the LSB of a SRL node result and that is shifting down an extended sign bit, see if we can change the SRL to shift down the MSB directly. These patterns can occur during legalisation when we've sign extended to a wider type but the SRL is still shifting from the subreg. Alternative to #114967 Fixes the remaining regression in #112588
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