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support BLKmode inputs for store_bit_field 

Revision 228586 changed useless_type_conversion_p and added mode
changes for MEM:BLKmode inputs in store_expr_with_bounds, but it
missed store_bit_field.  This caused ada/rts/s-regpat.ads to fail
compilation on x86_64-linux-gnu.

for  gcc/ChangeLog

	PR middle-end/67912
	* expmed.c (store_bit_field_1): Adjust mode of BLKmode inputs.

From-SVN: r228774
This commit is contained in:
Alexandre Oliva 2015-10-13 16:34:29 +00:00 committed by Alexandre Oliva
parent 7802cb1eef
commit e5c2c8d7af
2 changed files with 13 additions and 0 deletions
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5
gcc/ChangeLog
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@ -1,3 +1,8 @@
2015-10-13 Alexandre Oliva <aoliva@redhat.com>
PR middle-end/67912
* expmed.c (store_bit_field_1): Adjust mode of BLKmode inputs.
2015-10-12 Uros Bizjak <ubizjak@gmail.com>
* config/sparc/sparc.h (SPARC_STACK_ALIGN): Implement using

8
gcc/expmed.c
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@ -757,6 +757,14 @@ store_bit_field_1 (rtx str_rtx, unsigned HOST_WIDE_INT bitsize,
}
}
/* We allow move between structures of same size but different mode.
If source is in memory and the mode differs, simply change the memory. */
if (GET_MODE (value) == BLKmode && GET_MODE (op0) != BLKmode)
{
gcc_assert (MEM_P (value));
value = adjust_address_nv (value, GET_MODE (op0), 0);
}
/* Storing an lsb-aligned field in a register
can be done with a movstrict instruction. */