On November 12, 2021 6:55:47 PM GMT+01:00, Richard Sandiford via Gcc-patches <gcc-patches@gcc.gnu.org> wrote: >If-conversion now applies rewrite_to_defined_overflow to the >address calculation in an IFN_MASK_LOAD. This means that we >end up with: > > cast_base = (uintptr_t) base; > uncast_sum = cast_base + offset; > sum = (orig_type *) uncast_sum; > >If the target supports IFN_MASK_GATHER_LOAD with pointer-sized >offsets for the given vectype, we wouldn't look through the sum >cast and so would needlessly vectorise the uncast_sum addition. > >This showed up as several failures in gcc.target/aarch64/sve. > >Regstrapped on aarch64-linux-gnu and x86_64-linux-gnu. OK to install?
Ok. Richard. >Richard > > >gcc/ > * tree-vect-data-refs.c (vect_check_gather_scatter): Continue > processing conversions if the current offset is a pointer. >--- > gcc/tree-vect-data-refs.c | 1 + > 1 file changed, 1 insertion(+) > >diff --git a/gcc/tree-vect-data-refs.c b/gcc/tree-vect-data-refs.c >index f1d7f01a9ce..888ad72f3a9 100644 >--- a/gcc/tree-vect-data-refs.c >+++ b/gcc/tree-vect-data-refs.c >@@ -4139,6 +4139,7 @@ vect_check_gather_scatter (stmt_vec_info stmt_info, >loop_vec_info loop_vinfo, > /* Don't include the conversion if the target is happy with > the current offset type. */ > if (use_ifn_p >+ && !POINTER_TYPE_P (TREE_TYPE (off)) > && vect_gather_scatter_fn_p (loop_vinfo, DR_IS_READ (dr), > masked_p, vectype, memory_type, > TREE_TYPE (off), scale, &ifn,
