llvm-project

505d35aa - [X86] getFauxShuffleMask - relax one use limit for insert_subvector concat splat pattern (#127981)

[X86] getFauxShuffleMask - relax one use limit for insert_subvector concat splat pattern (#127981) If we're splatting a subvector using a insert_subvector(insert_subvector(undef,sub,0),sub,c) pattern then permit multiuse of the sub as long as the insert_subvector nodes are the only users.