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| author | Ahmed Bougacha <ahmed.bougacha@gmail.com> | 2015-03-17 03:23:09 +0000 |
|---|---|---|
| committer | Ahmed Bougacha <ahmed.bougacha@gmail.com> | 2015-03-17 03:23:09 +0000 |
| commit | e0afb1fe6c2facf927321f8f8e13851293df9796 (patch) | |
| tree | 93406fa6fcc767b9f2b1df045a26471a50bd7f4f /lldb/scripts/Python/python-wrapper.swig | |
| parent | e33e6c979c0974368d69e9edad35843d4a39fcef (diff) | |
| download | bcm5719-llvm-e0afb1fe6c2facf927321f8f8e13851293df9796.tar.gz bcm5719-llvm-e0afb1fe6c2facf927321f8f8e13851293df9796.zip | |
[AArch64] Use intermediate step for concat_vectors of illegal truncs.
Optimize concat_vectors of truncated vectors, where the intermediate
type is illegal, to avoid said illegality, e.g.,
(v4i16 (concat_vectors (v2i16 (truncate (v2i64))),
(v2i16 (truncate (v2i64)))))
->
(v4i16 (truncate (v4i32 (concat_vectors (v2i32 (truncate (v2i64))),
(v2i32 (truncate (v2i64)))))))
This isn't really target-specific, and, as such, would best go in the
DAGCombiner. However, ISD::TRUNCATE legality isn't keyed on both input
and result type, so we might generate worse code when we don't know
better. On AArch64 we know it's fine for v2i64->v4i16 and v4i32->v8i8.
rdar://20022387
llvm-svn: 232459
Diffstat (limited to 'lldb/scripts/Python/python-wrapper.swig')
0 files changed, 0 insertions, 0 deletions
