https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71264
--- Comment #10 from ro at CeBiTec dot Uni-Bielefeld.DE <ro at CeBiTec dot
Uni-Bielefeld.DE> ---
> --- Comment #9 from Richard Biener <rguenth at gcc dot gnu.org> ---
> Does adding
>
> ptr = __builtin_assume_alinged (alignof (footype), ptr);
> mask = __builtin_assume_aligned (alignof (footype), mask);
>
> help?
The failure mode changes: if I spell it as
ptr = __builtin_assume_aligned (ptr, __alignof__ (footype));
mask = __builtin_assume_aligned (mask, __alignof__ (footype));
the dump now has
/vol/gcc/src/hg/trunk/local/gcc/testsuite/gcc.dg/vect/pr71264.c:14:3: note: not
vectorized: vector stmt in loop:_16 = VIEW_CONVERT_EXPR<vector(4) unsigned
char>(_15);
/vol/gcc/src/hg/trunk/local/gcc/testsuite/gcc.dg/vect/pr71264.c:14:3: note:
can't determine vectorization factor.
/vol/gcc/src/hg/trunk/local/gcc/testsuite/gcc.dg/vect/pr71264.c:7:6: note:
vectorized 0 loops in function.
Rainer
