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| author | Sanjay Patel <spatel@rotateright.com> | 2020-01-09 09:36:22 -0500 |
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| committer | Sanjay Patel <spatel@rotateright.com> | 2020-01-09 09:38:12 -0500 |
| commit | cb5612e2df893728887bedd41aa2293f454c7845 (patch) | |
| tree | e44fdefb72c919dd35ad25916bdb7339dba645a2 /lldb/scripts/Python | |
| parent | 84ce46269cfda8800346706251ac3587b2d1c9f5 (diff) | |
| download | llvm-cb5612e2df893728887bedd41aa2293f454c7845.zip llvm-cb5612e2df893728887bedd41aa2293f454c7845.tar.gz llvm-cb5612e2df893728887bedd41aa2293f454c7845.tar.bz2 | |
[DAGCombiner] reduce extract subvector of concat
If we are extracting a chunk of a vector that's a fraction of an
operand of the concatenated vector operand, we can extract directly
from one of those original operands.
This is another suggestion from PR42024:
https://bugs.llvm.org/show_bug.cgi?id=42024#c2
But I'm not sure yet if it will make any difference on those patterns.
It seems to help a few existing AVX512 tests though.
Differential Revision: https://reviews.llvm.org/D72361
Diffstat (limited to 'lldb/scripts/Python')
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