[Bug target/83789] __builtin_altivec_lvx fails for powerpc for altivec-4.c

[bergner at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83789

--- Comment #23 from Peter Bergner <bergner at gcc dot gnu.org> ---
Created attachment 43728
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=43728&action=edit
Backport of trunk patch to GCC 7

Kaushik, can you verify the attached backported patch fixes the ICE on GCC 7?

This regtested fine on BE for me with no regressions.  My LE bootstrap/regtest
is still running.