| commit | 9f4a72f0885e976cffa78a27094be2dbe6c003df | |
| author | David Green <david.green@arm.com> | |
| Mon, 21 Oct 2019 09:53:38 +0000 (21 09:53 +0000) | ||
| committer | David Green <david.green@arm.com> | |
| Mon, 21 Oct 2019 09:53:38 +0000 (21 09:53 +0000) | ||
| tree | 9697c179b4c9416968fde2012e1713d3ecdb9f49 | treesnapshot (tar.gz zip) |
| parent | 4b014dfe842929c549835a4d7e106aa078efd2ae | commitdiff |
[ARM] Lower sadd_sat to qadd8 and qadd16
Lower the target independent signed saturating intrinsics to qadd8 and qadd16.
This custom lowers them from a sadd_sat, catching the node early before it is
promoted. It also adds a QADD8b and QADD16b node to mean the bottom "lane" of a
qadd8/qadd16, so that we can call demand bits on it to show that it does not
use the upper bits.
Also handles QSUB8 and QSUB16.
Differential Revision: https://reviews.llvm.org/D68974
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@375402 91177308-0d34-0410-b5e6-96231b3b80d8
Lower the target independent signed saturating intrinsics to qadd8 and qadd16.
This custom lowers them from a sadd_sat, catching the node early before it is
promoted. It also adds a QADD8b and QADD16b node to mean the bottom "lane" of a
qadd8/qadd16, so that we can call demand bits on it to show that it does not
use the upper bits.
Also handles QSUB8 and QSUB16.
Differential Revision: https://reviews.llvm.org/D68974
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@375402 91177308-0d34-0410-b5e6-96231b3b80d8