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Commit 59479e72 authored by Craig Topper's avatar Craig Topper
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[AVX512] Teach lowering to use vplzcntd/q to implement 128/256-bit... 

[AVX512] Teach lowering to use vplzcntd/q to implement 128/256-bit CTTZ_ZERO_UNDEF even without VLX support. We can just extend to 512-bits and extract like we do for CTLZ.

llvm-svn: 267100
parent 71480bd0
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