[Bug target/64821] [AArch64] Improve target folding for vsqrt_f64 intrinsic

["cvs-commit at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64821

--- Comment #9 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The trunk branch has been updated by Andrew Pinski <pinskia@gcc.gnu.org>:

https://gcc.gnu.org/g:cbcf4a50fa21abd7a4a50a7ce47ada80b115febc

commit r12-6824-gcbcf4a50fa21abd7a4a50a7ce47ada80b115febc
Author: Andrew Pinski <apinski@marvell.com>
Date:   Sun Jan 9 23:39:31 2022 -0800

    [aarch64/64821]: Simplify __builtin_aarch64_sqrt* into internal function
.SQRT.

    This is a simple patch which simplifies the __builtin_aarch64_sqrt*
builtins
    into the internal function SQRT which allows for constant folding and other
    optimizations at the gimple level. It was originally suggested we do to
    __builtin_sqrt just for __builtin_aarch64_sqrtdf when -fno-math-errno
    but since r6-4969-g686ee9719a4 we have the internal function SQRT which
does
    the same so it makes we don't need to check -fno-math-errno either now.

    Applied as approved after bootstrapped and tested on aarch64-linux-gnu with
no regressions.

            PR target/64821

    gcc/ChangeLog:

            * config/aarch64/aarch64-builtins.cc
            (aarch64_general_gimple_fold_builtin): Handle
            __builtin_aarch64_sqrt* and simplify into SQRT internal
            function.

    gcc/testsuite/ChangeLog:

            * gcc.target/aarch64/vsqrt-1.c: New test.
            * gcc.target/aarch64/vsqrt-2.c: New test.