[PATCH] gas: xtensa: limit size of auto litpools

[augustine.sterling@gmail.com]

On Sun, Feb 11, 2018 at 4:18 PM, Max Filippov <jcmvbkbc@gmail.com> wrote:
> Literal movement code may grow auto litpool so big that it won't be
> possible to jump around it. Limit the size of auto litpools by 1/2 of
> the jump range.
>
> gas/
> 2018-02-08  Max Filippov  <jcmvbkbc@gmail.com>
>
>         * config/tc-xtensa.c (struct litpool_frag): Add new field
>         literal_count.
>         (MAX_AUTO_POOL_LITERALS, MAX_EXPLICIT_POOL_LITERALS)
>         (MAX_POOL_LITERALS): New macro definitions.
>         (auto_litpool_limit): Initialize to 0.
>         (md_parse_option): Set auto_litpool_limit in the presence of
>         --auto-litpools option.
>         (xtensa_maybe_create_literal_pool_frag): Zero-initialize
>         literal_count field.
>         (xg_find_litpool): New function. Make sure that found literal
>         pool size is within the limit.
>         (xtensa_move_literals): Extract literal pool search code into
>         the new function.
>         * testsuite/gas/xtensa/all.exp: Add auto-litpools-2 test.
>         * testsuite/gas/xtensa/auto-litpools-2.d: New file.
>         * testsuite/gas/xtensa/auto-litpools-2.s: New file.
>         * testsuite/gas/xtensa/auto-litpools.d: Fix up changed
>         addresses.
>         * testsuite/gas/xtensa/auto-litpools.s: Change literal value so
>         that objdump doesn't get out of sync.


This is OK for binutils.