[Bug middle-end/123175] [14/15/16/17 Regression] Wrong folding of VEC_PERM_EXPR

[rguenth at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=123175

--- Comment #20 from Richard Biener <rguenth at gcc dot gnu.org> ---
Besides self-tests in fold-const.cc this should be fully fixed on trunk and the
16 branch.  I'll fixup self-tests on trunk and close.