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From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/64821] [AArch64] Improve target folding for vsqrt_f64
 intrinsic
Date: Mon, 10 Jan 2022 01:19:53 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D64821

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |ASSIGNED
           Assignee|unassigned at gcc dot gnu.org      |pinskia at gcc dot =
gnu.org

--- Comment #4 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
I am going to fix this but maybe not until stage 1.

I think this is enough too:
diff --git a/gcc/config/aarch64/aarch64-builtins.c
b/gcc/config/aarch64/aarch64-builtins.c
index 58bcbd9875f..1bf487477eb 100644
--- a/gcc/config/aarch64/aarch64-builtins.c
+++ b/gcc/config/aarch64/aarch64-builtins.c
@@ -2820,6 +2820,13 @@ aarch64_general_gimple_fold_builtin (unsigned int fc=
ode,
gcall *stmt,
        gimple_call_set_lhs (new_stmt, gimple_call_lhs (stmt));
        break;

+      /* Lower sqrt builtins to gimple/internal function sqrt. */
+      BUILTIN_VHSDF_DF (UNOP, sqrt, 2, FP)
+       new_stmt =3D gimple_build_call_internal (IFN_SQRT,
+                                              1, args[0]);
+       gimple_call_set_lhs (new_stmt, gimple_call_lhs (stmt));
+       break;
+
      /*lower store and load neon builtins to gimple.  */
      BUILTIN_VALL_F16 (LOAD1, ld1, 0, LOAD)
      BUILTIN_VDQ_I (LOAD1_U, ld1, 0, LOAD)=