| commit | d460c1de3b989cea919b9d60c21644f28f987950 | |
| author | Simon Pilgrim <RKSimon@users.noreply.github.com> | |
| Mon, 8 Jan 2024 18:01:41 +0000 (8 18:01 +0000) | ||
| committer | GitHub <noreply@github.com> | |
| Mon, 8 Jan 2024 18:01:41 +0000 (8 18:01 +0000) | ||
| tree | 18e7fed4f9add3650ae2b4e6167e517eb9e5040c | treesnapshot (tar.gz zip) |
| parent | 5351ded68d579921a61b26a34e36046c22f668bd | commitdiff |
[DAG] SimplifyDemandedBits - don't fold sext(x) -> aext(x) if we lose an 0/-1 allsignbits mask (#77296)
For targets that use 0/-1 boolean results, we want to keep this pattern through extensions/truncations as much as possible - so avoid simplifying to any_extend even if we don't demand the upper bits.
Noticed in triage for https://reviews.llvm.org/D152928
For targets that use 0/-1 boolean results, we want to keep this pattern through extensions/truncations as much as possible - so avoid simplifying to any_extend even if we don't demand the upper bits.
Noticed in triage for https://reviews.llvm.org/D152928