[PATCH] D102969: [GlobalISel] Add G_SBFX/G_UBFX to computeKnownBits
Simon Pilgrim via Phabricator via llvm-commits
llvm-commits at lists.llvm.org
Thu May 27 02:51:50 PDT 2021
RKSimon added a comment.
What about G_SBFX handling in GISelKnownBits::computeNumSignBits?
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Comment at: llvm/lib/CodeGen/GlobalISel/GISelKnownBits.cpp:514
+ WidthKnown.getMinValue().getLimitedValue(BitWidth));
+ Known = KnownBits::lshr(SrcOpKnown, OffsetKnown) & Mask;
+ if (Opcode == TargetOpcode::G_SBFX) {
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Are you going to have any issues here when Mask.hasConflict() is true?
CHANGES SINCE LAST ACTION
https://reviews.llvm.org/D102969/new/
https://reviews.llvm.org/D102969
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