On Fri, Oct 16, 2015 at 7:42 PM, H.J. Lu <hongjiu...@intel.com> wrote:
> Since GET_MODE_ALIGNMENT is defined by psABI and the biggest alignment
> is 4 byte for IA MCU psABI, we should use GET_MODE_BITSIZE to get
> vector natural alignment to check misaligned vector move.
>
> OK for trunk?
>
> Thanks.
>
> H.J.
> ---
> * config/i386/i386.c (ix86_expand_vector_move): Use
> GET_MODE_BITSIZE to get vector natural alignment.
> ---
> gcc/config/i386/i386.c | 4 +++-
> 1 file changed, 3 insertions(+), 1 deletion(-)
>
> diff --git a/gcc/config/i386/i386.c b/gcc/config/i386/i386.c
> index ebe2b0a..d0e1f4c 100644
> --- a/gcc/config/i386/i386.c
> +++ b/gcc/config/i386/i386.c
> @@ -18650,7 +18650,9 @@ void
> ix86_expand_vector_move (machine_mode mode, rtx operands[])
> {
> rtx op0 = operands[0], op1 = operands[1];
> - unsigned int align = GET_MODE_ALIGNMENT (mode);
> + /* Use GET_MODE_BITSIZE instead of GET_MODE_ALIGNMENT since the
> + biggest alignment is 4 byte for IA MCU psABI. */
> + unsigned int align = GET_MODE_BITSIZE (mode);
How about using TARGET_IAMCU condition here and using bitsize only for
TARGET_IAMCU?
Uros.
> if (push_operand (op0, VOIDmode))
> op0 = emit_move_resolve_push (mode, op0);
> --
> 2.4.3
>
