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| author | Simon Pilgrim <llvm-dev@redking.me.uk> | 2022-03-21 21:37:37 +0000 |
|---|---|---|
| committer | Simon Pilgrim <llvm-dev@redking.me.uk> | 2022-03-21 21:37:42 +0000 |
| commit | 438ac282db97c584daf2d4d1a90e6b3d49ef9189 (patch) | |
| tree | fb807fe98529544ede91494280e09dfee423767f /llvm/lib/Bitcode/Reader/BitcodeReader.cpp | |
| parent | d13752851a4e134708f365a5b238e8ff375accaa (diff) | |
[X86] combineAddOrSubToADCOrSBB - Fold ADD/SUB + (AND(SRL(X,Y),1) -> ADC/SBB+BT(X,Y) (REAPPLIED)
As suggested on PR35908, if we are adding/subtracting an extracted bit, attempt to use BT instead to fold the op and use a ADC/SBB op.
Reapply with extra type legality checks - LowerAndToBT was originally only used during lowering, now that it can occur earlier we might encounter illegal types that we can either promote to i32 or just bail.
Differential Revision: https://reviews.llvm.org/D122084
Diffstat (limited to 'llvm/lib/Bitcode/Reader/BitcodeReader.cpp')
0 files changed, 0 insertions, 0 deletions