| commit | 3614662adbe10c4e83338a23e020cd4874c92320 | [log] [tgz] |
|---|---|---|
| author | Tim Northover <tnorthover@apple.com> | Wed Jul 29 21:34:32 2015 +0000 |
| committer | Tim Northover <tnorthover@apple.com> | Wed Jul 29 21:34:32 2015 +0000 |
| tree | 641fe5ea455d10bce83b862fdb92076b6522d7a6 | |
| parent | 81474d36a0e7415f765193f5df272522930831a8 [diff] |
AArch64: use 32-bit MOV rather than UBFX to truncate registers. It's potentially more efficient on Cyclone, and from the optimization guides & schedulers looks like it has no effect on Cortex-A53 or A57. In general you'd expect a MOV to be about the most efficient instruction with its semantics, even though the official "UXTW" alias is really a UBFX. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@243576 91177308-0d34-0410-b5e6-96231b3b80d8