diff options
| author | Sanjay Patel <spatel@rotateright.com> | 2018-10-14 15:25:06 +0000 |
|---|---|---|
| committer | Sanjay Patel <spatel@rotateright.com> | 2018-10-14 15:25:06 +0000 |
| commit | 7181146c6c45e14614b4eef8a8b5d1e91d0b2ad7 (patch) | |
| tree | 336ec1d12d67b6fa0de703d38aa17d965f2fb577 /llvm/lib/CodeGen/SelectionDAG | |
| parent | 38bbf81ade2fa94018db2f0777fa19de71c78f41 (diff) | |
| download | bcm5719-llvm-7181146c6c45e14614b4eef8a8b5d1e91d0b2ad7.tar.gz bcm5719-llvm-7181146c6c45e14614b4eef8a8b5d1e91d0b2ad7.zip | |
[InstCombine] combine a shuffle and an extract subvector shuffle
This is part of the missing IR-level folding noted in D52912.
This should be ok as a canonicalization because the new shuffle mask can't
be any more complicated than the existing shuffle mask. If there's some
target where the shorter vector shuffle is not legal, it should just end up
expanding to something like the pair of shuffles that we're starting with here.
Differential Revision: https://reviews.llvm.org/D53037
llvm-svn: 344476
Diffstat (limited to 'llvm/lib/CodeGen/SelectionDAG')
0 files changed, 0 insertions, 0 deletions
