[PATCH] D46957: [x86] Lower some trunc + shuffle patterns to vpmov[q|d][b|w]
Simon Pilgrim via Phabricator via llvm-commits
llvm-commits at lists.llvm.org
Wed May 23 10:43:07 PDT 2018
RKSimon added inline comments.
================
Comment at: lib/Target/X86/X86ISelLowering.cpp:9429
+ while (I < Size) {
+ if (isInRange(Mask[I], TruncatedVectorStart, TruncatedVectorStart + Size))
+ return false;
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Why can't you permit UNDEFs in the shuffle mask?
https://reviews.llvm.org/D46957
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