[VectorCombine] Pick changes for load scalarization. #11884
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…t if all extracts would lead to UB on poison. (llvm#164683) This change aims to avoid inserting a freeze instruction between the load and bitcast when scalarizing extend-extract. This is particularly useful in combination with llvm#164682, which can then potentially further scalarize, provided there is no freeze. alive2 proof: https://alive2.llvm.org/ce/z/W-GD88 (cherry picked from commit 28a20b4)
…tions. (llvm#164682) This change aims to convert vector loads to scalar loads, if they are only converted to scalars after anyway. alive2 proof: https://alive2.llvm.org/ce/z/U_rvht (cherry picked from commit 8280070)
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Avoid inserting freeze when scalarizing extend-extract if all extracts would lead to UB on poison. (llvm#164683)
This change aims to avoid inserting a freeze instruction between the
load and bitcast when scalarizing extend-extract. This is particularly
useful in combination with
llvm#164682, which can then
potentially further scalarize, provided there is no freeze.
alive2 proof: https://alive2.llvm.org/ce/z/W-GD88
(cherry picked from commit 28a20b4)
Try to scalarize vector loads feeding bitcast instructions. (llvm#164682)
This change aims to convert vector loads to scalar loads, if they are
only converted to scalars after anyway.
alive2 proof: https://alive2.llvm.org/ce/z/U_rvht
(cherry picked from commit 8280070)