https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102767
--- Comment #6 from Segher Boessenkool <segher at gcc dot gnu.org> --- (In reply to Richard Earnshaw from comment #5) > We have the type > <vector_type 0x7ffff758c9d8 > type <integer_type 0x7ffff7517bd0 public unsigned TI > size <integer_cst 0x7ffff7514ee8 constant 128> > unit-size <integer_cst 0x7ffff7514f00 constant 16> > and movmisalign pattern is enabled for this. > > but the vectorization cost doesn't handle the case of elements=1, which is > the case when mode is TImode. > > So I think this is an inconsistency in the rs6000 backend - either add > costing support for single elements or disable the movmisalign code in this > case. But TImode is a scalar type, not a vector type, so it should hit one of the early-outs at the top of rs6000_builtin_vectorization_cost?
