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| author | Sanjay Patel <spatel@rotateright.com> | 2019-12-15 09:32:03 -0500 |
|---|---|---|
| committer | Sanjay Patel <spatel@rotateright.com> | 2019-12-15 09:32:03 -0500 |
| commit | 6080387f136af5a51bbc310abb08c7158d7cd9d2 (patch) | |
| tree | 1ccdd02183bb684d7fb2e99249ff8e5e870875a2 /llvm/lib/MC/MCDisassembler/MCDisassembler.cpp | |
| parent | 2afe86411847b3305915f536256b8bb877d8a356 (diff) | |
| download | llvm-6080387f136af5a51bbc310abb08c7158d7cd9d2.zip llvm-6080387f136af5a51bbc310abb08c7158d7cd9d2.tar.gz llvm-6080387f136af5a51bbc310abb08c7158d7cd9d2.tar.bz2 | |
[InstSimplify] fold splat of inserted constant to vector constant
shuf (inselt ?, C, IndexC), undef, <IndexC, IndexC...> --> <C, C...>
This is another missing shuffle fold pattern uncovered by the
shuffle correctness fix from D70246.
The problem was visible in the post-commit thread example, but
we managed to overcome the limitation for that particular case
with D71220.
This is something like the inverse of the previous fix - there
we didn't demand the inserted scalar, and here we are only
demanding an inserted scalar.
Differential Revision: https://reviews.llvm.org/D71488
Diffstat (limited to 'llvm/lib/MC/MCDisassembler/MCDisassembler.cpp')
0 files changed, 0 insertions, 0 deletions