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Re: Extend neg_const_int simplifications to other const rtxes
- From: Jeff Law <law at redhat dot com>
- To: gcc-patches at gcc dot gnu dot org, richard dot sandiford at arm dot com
- Date: Fri, 20 Sep 2019 14:25:04 -0600
- Subject: Re: Extend neg_const_int simplifications to other const rtxes
- References: <mptmuf214a2.fsf@arm.com>
On 9/18/19 12:56 AM, Richard Sandiford wrote:
> This patch generalises some neg_const_int-based rtx simplifications
> so that they handle all CONST_SCALAR_INTs and also CONST_POLY_INT.
> This actually simplifies things a bit, since we no longer have
> to treat HOST_WIDE_INT_MIN specially.
>
> This is tested by later SVE patches.
>
> Tested on aarch64-linux-gnu with SVE (with and without follow-on
> patches) and x86_64-linux-gnu. OK to install?
>
> Richard
>
>
> 2019-09-18 Richard Sandiford <richard.sandiford@arm.com>
>
> gcc/
> * simplify-rtx.c (neg_const_int): Replace with...
> (neg_poly_int_rtx): ...this new function.
> (simplify_binary_operation_1): Extend (minus x C) -> (plus X -C)
> to all CONST_SCALAR_INTs and to CONST_POLY_INT.
> (simplify_plus_minus): Likewise for constant terms here.
OK
jeff