Improve vector load store. Changes make llvm emit parallel ld/st instead of scalar ld/st.
Improve vector load store.
Changes make llvm emit parallel ld/st instead of scalar ld/st.

llvmpy/llvmpy,llvmpy/llvmpy,llvmpy/llvmpy,llvmpy/llvmpy,llvmpy/llvmpy,llvmpy/llvmpy