Ping!
> -----Original Message-----
> From: gcc-patches-ow...@gcc.gnu.org [mailto:gcc-patches-
> ow...@gcc.gnu.org] On Behalf Of Sivanupandi, Pitchumani
> Sent: Tuesday, April 21, 2015 8:21 PM
> To: Georg-Johann Lay; Denis Chertykov
> Cc: GCC Patches
> Subject: [patch, avr] extend part-clobbered check to AVR_TINY architecture
>
> Hi,
>
> When tried backporting AVR_TINY architecture support to 4.9, build failed in
> libgcc for AVR_TINY.
> Failure was due to ICE same as:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=53065
>
> Fix provided for that bug checks for if the mode crosses the callee saved
> register.
> Below patch updates that check as the AVR_TINY has different set of callee
> saved registers (r18 and r19).
>
> This patch is against trunk.
>
> NOTE: ICE is re-produciable only with 4.9 + tiny patch and --with-dwarf2
> enabled.
>
> Is this ok for trunk?
>
> diff --git a/gcc/config/avr/avr.c b/gcc/config/avr/avr.c index
> 68d5ddc..2f441e5 100644
> --- a/gcc/config/avr/avr.c
> +++ b/gcc/config/avr/avr.c
> @@ -11333,9 +11333,10 @@ avr_hard_regno_call_part_clobbered (unsigned
> regno, machine_mode mode)
> return 0;
>
> /* Return true if any of the following boundaries is crossed:
> - 17/18, 27/28 and 29/30. */
> + 17/18 or 19/20 (if AVR_TINY), 27/28 and 29/30. */
>
> - return ((regno < 18 && regno + GET_MODE_SIZE (mode) > 18)
> + return ((regno <= LAST_CALLEE_SAVED_REG &&
> + regno + GET_MODE_SIZE (mode) > (LAST_CALLEE_SAVED_REG + 1))
> || (regno < REG_Y && regno + GET_MODE_SIZE (mode) > REG_Y)
> || (regno < REG_Z && regno + GET_MODE_SIZE (mode) > REG_Z)); }
>
>
> Regards,
> Pitchumani
