Use uppercase in the subvector description ("32x2" -> "32X4" etc.) - matches what we already do in VBROADCAST??X?, and we try to use uppercase for all x86 instruction mnemonics anyway (and lowercase just for the arg description suffix).
simplifyAndOrOfFCmps
.llvm.rodata.offloading
setHistorySize()
MemoryGroup
LSUnitBase
APFloat
!and
!or