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| author | Sanjay Patel <spatel@rotateright.com> | 2015-03-20 21:47:56 +0000 |
|---|---|---|
| committer | Sanjay Patel <spatel@rotateright.com> | 2015-03-20 21:47:56 +0000 |
| commit | ccf5f24b7b907680bdcfb19104cae78a92580682 (patch) | |
| tree | 7881b1b31a6120b5097b06b57279e3f97e03288b /llvm/lib/CodeGen/MachineFunction.cpp | |
| parent | 3170e5620e463b20688bc629bde08c5ca554ea11 (diff) | |
| download | llvm-ccf5f24b7b907680bdcfb19104cae78a92580682.zip llvm-ccf5f24b7b907680bdcfb19104cae78a92580682.tar.gz llvm-ccf5f24b7b907680bdcfb19104cae78a92580682.tar.bz2 | |
[X86, AVX] instcombine common cases of vperm2* intrinsics into shuffles
vperm2* intrinsics are just shuffles.
In a few special cases, they're not even shuffles.
Optimizing intrinsics in InstCombine is better than
handling this in the front-end for at least two reasons:
1. Optimizing custom-written SSE intrinsic code at -O0 makes vector coders
really angry (and so I have regrets about some patches from last week).
2. Doing mask conversion logic in header files is hard to write and
subsequently read.
There are a couple of TODOs in this patch to complete this optimization.
Differential Revision: http://reviews.llvm.org/D8486
llvm-svn: 232852
Diffstat (limited to 'llvm/lib/CodeGen/MachineFunction.cpp')
0 files changed, 0 insertions, 0 deletions