[Bug tree-optimization/88739] [7/8/9 Regression] Big-endian union bug

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88739

--- Comment #15 from Richard Biener <rguenth at gcc dot gnu.org> ---
Oh, and with making U.val a same-sized float type one might be able to
test FLOAT_WORDS_BIG_ENDIAN effects (only mmix, pdp11, tilegx and visum
affected).

Not sure about REG_WORDS_BIG_ENDIAN at all (c6x is the only target defining
this).