On 08/23/2017 04:57 AM, Richard Sandiford wrote:
> This patch is like the earlier GET_MODE_UNIT_SIZE one,
> but for precisions rather than sizes. There is one behavioural
> change in expand_debug_expr: we shouldn't use lowpart subregs
> for non-scalar truncations, since that would just reinterpret
> some of the scalars and drop the rest. (This probably doesn't
> trigger in practice.) Using TRUNCATE is fine for scalars,
> since simplify_gen_unary knows when a subreg can be used.
>
> Tested on aarch64-linux-gnu and x86_64-linux-gnu, and by making sure
> that there were no differences in testsuite assembly output for one
> target per CPU. OK to install?
>
> Richard
>
>
> 2017-08-23 Richard Sandiford <richard.sandif...@linaro.org>
> Alan Hayward <alan.hayw...@arm.com>
> David Sherwood <david.sherw...@arm.com>
>
> gcc/
> * cfgexpand.c (expand_debug_expr): Use GET_MODE_UNIT_PRECISION.
> (expand_debug_source_expr): Likewise.
> * combine.c (combine_simplify_rtx): Likewise.
> * cse.c (fold_rtx): Likewise.
> * optabs.c (expand_float): Likewise.
> * simplify-rtx.c (simplify_unary_operation_1): Likewise.
> (simplify_binary_operation_1): Likewise.
OK.
jeff
