On Thu, Aug 11, 2011 at 1:56 PM, Richard Sandiford
<[email protected]> wrote:
> gcc/
> * config/arm/arm.c (get_label_padding): New function.
> (create_fix_barrier, md_reorg): Likewise.
The ChangeLog doesn't match the patch:
* create_fix_barrier is not a new function.
* md_reorg should be arm_reorg
Ciao!
Steven
> Index: gcc/config/arm/arm.c
> ===================================================================
> --- gcc/config/arm/arm.c 2011-08-11 11:49:18.780977049 +0100
> +++ gcc/config/arm/arm.c 2011-08-11 12:14:42.074629364 +0100
> @@ -11719,6 +11719,19 @@ get_jump_table_size (rtx insn)
> return 0;
> }
>
> +/* Return the maximum amount of padding that will be inserted before
> + label LABEL. */
> +
> +static HOST_WIDE_INT
> +get_label_padding (rtx label)
> +{
> + HOST_WIDE_INT align, min_insn_size;
> +
> + align = 1 << label_to_alignment (label);
> + min_insn_size = TARGET_THUMB ? 2 : 4;
> + return align > min_insn_size ? align - min_insn_size : 0;
> +}
> +
> /* Move a minipool fix MP from its current location to before MAX_MP.
> If MAX_MP is NULL, then MP doesn't need moving, but the addressing
> constraints may need updating. */
> @@ -12265,8 +12278,12 @@ create_fix_barrier (Mfix *fix, HOST_WIDE
> within range. */
> gcc_assert (GET_CODE (from) != BARRIER);
>
> - /* Count the length of this insn. */
> - count += get_attr_length (from);
> + /* Count the length of this insn. This must stay in sync with the
> + code that pushes minipool fixes. */
> + if (LABEL_P (from))
> + count += get_label_padding (from);
> + else
> + count += get_attr_length (from);
>
> /* If there is a jump table, add its length. */
> tmp = is_jump_table (from);
> @@ -12696,6 +12713,11 @@ arm_reorg (void)
> insn = table;
> }
> }
> + else if (LABEL_P (insn))
> + /* Add the worst-case padding due to alignment. We don't add
> + the _current_ padding because the minipool insertions
> + themselves might change it. */
> + address += get_label_padding (insn);
> }
>
> fix = minipool_fix_head;
>
