* Claudiu Zissulescu <claz...@gmail.com> [2018-11-12 13:25:12 +0200]:
> Avoid emitting lp instruction when in its ZOL body we find a jump table data
> in text section.
>
> gcc/
> xxxx-xx-xx Claudiu Zissulescu <claz...@synopsys.com>
>
> * config/arc/arc.c (hwloop_optimize): Bailout when detecting a
> jump table data in the text section.
This looks good from a code point of view, but there's no explanation
for _why_ this change was made.... might be worth mentioning.
Thanks,
Andrew
> ---
> gcc/config/arc/arc.c | 12 +++++++++++-
> 1 file changed, 11 insertions(+), 1 deletion(-)
>
> diff --git a/gcc/config/arc/arc.c b/gcc/config/arc/arc.c
> index a92456b457d..9eab4c27284 100644
> --- a/gcc/config/arc/arc.c
> +++ b/gcc/config/arc/arc.c
> @@ -7791,7 +7791,17 @@ hwloop_optimize (hwloop_info loop)
> for (insn = loop->start_label;
> insn && insn != loop->loop_end;
> insn = NEXT_INSN (insn))
> - length += NONDEBUG_INSN_P (insn) ? get_attr_length (insn) : 0;
> + {
> + length += NONDEBUG_INSN_P (insn) ? get_attr_length (insn) : 0;
> + if (JUMP_TABLES_IN_TEXT_SECTION
> + && JUMP_TABLE_DATA_P (insn))
> + {
> + if (dump_file)
> + fprintf (dump_file, ";; loop %d has a jump table\n",
> + loop->loop_no);
> + return false;
> + }
> + }
>
> if (!insn)
> {
> --
> 2.19.1
>
