On Fri, 5 Aug 2022 at 18:26, Andre Vieira (lists)
<andre.simoesdiasvie...@arm.com> wrote:
>
> Hi,
>
> This patch is part of the WIP patch that follows in this series. It's
> goal is to teach forwprop to handle VLA VEC_PERM_EXPRs with VLS
> CONSTRUCTORs as arguments as preparation for the 'VLA constructor' hook
> approach.
/* Shuffle of a constructor. */
bool ret = false;
- tree res_type = TREE_TYPE (arg0);
+ tree res_type = TREE_TYPE (gimple_get_lhs (stmt));
tree opt = fold_ternary (VEC_PERM_EXPR, res_type, arg0, arg1, op2);
if (!opt
|| (TREE_CODE (opt) != CONSTRUCTOR && TREE_CODE (opt) != VECTOR_CST))
This has to be TREE_TYPE (arg0). I had changed it to TREE_TYPE
(gimple_assign_lhs (stmt)) and it caused
several ICE's on ppc64le (PR106360)
For details, see:
https://gcc.gnu.org/pipermail/gcc-patches/2022-July/598611.html
I currently have a patch in review that extends fold_vec_perm to
handle differing vector lengths:
https://gcc.gnu.org/pipermail/gcc-patches/2022-August/599126.html
Thanks,
Prathamesh
>
> Kind Regards,
> Andre
