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arm.c (get_label_padding): New function.

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gcc/
	* config/arm/arm.c (get_label_padding): New function.
	(create_fix_barrier, md_reorg): Likewise.

From-SVN: r177689
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Richard Sandiford 2011-08-12 07:59:09 +00:00 committed by Richard Sandiford
parent 786eeca2bd
commit 20fe71c256
2 changed files with 29 additions and 2 deletions
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5
gcc/ChangeLog
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@ -1,3 +1,8 @@
2011-08-12 Richard Sandiford <rdsandiford@googlemail.com>
* config/arm/arm.c (get_label_padding): New function.
(create_fix_barrier, md_reorg): Likewise.
2011-08-11 Uros Bizjak <ubizjak@gmail.com>
PR target/49781

26
gcc/config/arm/arm.c
View File

@ -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_INT max_address)
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;