https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115466
Kewen Lin <linkw at gcc dot gnu.org> changed:
What |Removed |Added
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CC| |linkw at gcc dot gnu.org
--- Comment #2 from Kewen Lin <linkw at gcc dot gnu.org> ---
(In reply to Andrew Pinski from comment #1)
> > int ia[8] = {1, 2, 3, 4, 5, 6, 7, 8};
> > float fa[8] = {10.0, 20.0, 30.0, 40.0, 50.0, 60.0, 70.0, 80.0};
>
> The way vec_ld works is is (a+b)&~0xf is the address which is being loaded.
>
> Both ia and fa are not specified as being aligned to the 16byte boundary so
> it could be loading from before hand.
>
> What happens if you do:
> int ia[8] __attribute__((aligned(16))) = {1, 2, 3, 4, 5, 6, 7, 8};
> float fa[8] __attribute__((aligned(16))) = {10.0, 20.0, 30.0, 40.0, 50.0,
> 60.0, 70.0, 80.0};
>
> Instead?
Good point, I can't reproduce the reported issue on two LE machines, so I'd
leave Carl to confirm. But from the output (biasing two elements from the
expected), I believe this is the root cause.
