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From: "crazylht at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/107057] [10/11/12/13 Regression] ICE in
 extract_constrain_insn, at recog.cc:2692
Date: Tue, 25 Oct 2022 09:15:54 +0000
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X-Bugzilla-Component: rtl-optimization
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X-Bugzilla-Keywords: ice-on-valid-code, ra
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D107057

--- Comment #5 from Hongtao.liu <crazylht at gmail dot com> ---
I'm testing

modified   gcc/lra-constraints.cc
@@ -4382,7 +4382,14 @@ curr_insn_transform (bool check_only_p)
                 (op, (enum reg_class) goal_alt[i]) =3D=3D NO_REGS)
                || no_input_reloads_p))
          {
-           rtx tem =3D force_const_mem (mode, op);
+           rtx tem;
+
+           /* PR 107057, for same constant pool, don't bother
+              force_const_mem again, just reuse the matched op.  */
+           if (goal_alt_matches[i] >=3D 0)
+             tem =3D *curr_id->operand_loc[goal_alt_matches[i]];
+           else
+             tem =3D force_const_mem (mode, op);

            change_p =3D true;
            if (subreg !=3D NULL_RTX)=