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| author | Florian Hahn <flo@fhahn.com> | 2021-11-05 17:45:49 +0100 |
|---|---|---|
| committer | Florian Hahn <flo@fhahn.com> | 2021-11-05 19:11:15 +0100 |
| commit | f64580f8d2ce5e1161857f9c89c2eee7a74c5ab8 (patch) | |
| tree | 3a3b6c939a9fbb1779d222424ab080ba39505640 /llvm/lib/Bitcode/Reader/BitcodeReader.cpp | |
| parent | 97c899f3c5d9bbff2824b3252b21378bf96f3f3f (diff) | |
[AArch64][GISel] Optimize 8 and 16 bit variants of uaddo.
Try simplify G_UADDO with 8 or 16 bit operands to wide G_ADD and TBNZ if
result is only used in the no-overflow case. It is restricted to cases
where we know that the high-bits of the operands are 0. If there's an
overflow, then the the 9th or 17th bit must be set, which can be checked
using TBNZ.
Reviewed By: paquette
Differential Revision: https://reviews.llvm.org/D111888
Diffstat (limited to 'llvm/lib/Bitcode/Reader/BitcodeReader.cpp')
0 files changed, 0 insertions, 0 deletions