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From: "crazylht at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/108601] [13 Regression] vector peeling ICEs
 with PGO + LTO + IPA inlining in gcc_r in SPEC2017
Date: Tue, 31 Jan 2023 08:28:34 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D108601

--- Comment #5 from Hongtao.liu <crazylht at gmail dot com> ---
(In reply to Hongtao.liu from comment #4)
> So that would be case: the tripcount is known, the vect_factor is known, =
but
> still niters_vector_mult_vf is variable(or it's not fold into an constant=
).?

Maybe related to this tricky


      if (!integer_onep (*step_vector))
        {
          /* On exit from the loop we will have an easy way of calcalating
             NITERS_VECTOR / STEP * STEP.  Install a dummy definition
             until then.  */
          niters_vector_mult_vf =3D make_ssa_name (TREE_TYPE (*niters_vecto=
r));
          SSA_NAME_DEF_STMT (niters_vector_mult_vf) =3D gimple_build_nop ();
          *niters_vector_mult_vf_var =3D niters_vector_mult_vf;
        }
      else
        vect_gen_vector_loop_niters_mult_vf (loop_vinfo, *niters_vector,
                                             &niters_vector_mult_vf);=