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Re: Another DCE problem with array addresses
- From: Diego Novillo <dnovillo at redhat dot com>
- To: Richard Kenner <kenner at vlsi1 dot ultra dot nyu dot edu>
- Cc: "gcc at gcc dot gnu dot org" <gcc at gcc dot gnu dot org>
- Date: Tue, 10 Aug 2004 13:16:06 -0400
- Subject: Re: Another DCE problem with array addresses
- Organization: Red Hat Canada
- References: <10408011329.AA26829@vlsi1.ultra.nyu.edu>
On Sun, 2004-08-01 at 09:29, Richard Kenner wrote:
> *** c41325a.adb.t21.copyrename1 2004-08-01 09:24:50.000000000 -0400
> --- c41325a.adb.t22.dce1 2004-08-01 09:24:50.000000000 -0400
> ***************
> *** 42,75 ****
> var_ara_1[7]{lb: 1 sz: 4} = 1;
> # var_ara_1_9 = V_MAY_DEF <var_ara_1_8>;
> var_ara_1[8]{lb: 1 sz: 4} = 1;
> # var_ara_1_10 = V_MAY_DEF <var_ara_1_9>;
> var_ara_1[9]{lb: 1 sz: 4} = 1;
> # var_ara_1_11 = V_MAY_DEF <var_ara_1_10>;
> var_ara_1[10]{lb: 1 sz: 4} = 1;
> - # T.0_13 = V_MAY_DEF <T.0_12>;
> - T.0[1]{lb: 1 sz: 4} = 1;
> - # T.0_14 = V_MAY_DEF <T.0_13>;
> - T.0[2]{lb: 1 sz: 4} = 1;
> - # T.0_15 = V_MAY_DEF <T.0_14>;
> - T.0[3]{lb: 1 sz: 4} = 1;
> - # T.0_16 = V_MAY_DEF <T.0_15>;
> - T.0[4]{lb: 1 sz: 4} = 1;
> - # T.0_17 = V_MAY_DEF <T.0_16>;
> - T.0[5]{lb: 1 sz: 4} = 1;
> - # T.0_18 = V_MAY_DEF <T.0_17>;
> - T.0[6]{lb: 1 sz: 4} = 1;
> - # T.0_19 = V_MAY_DEF <T.0_18>;
> - T.0[7]{lb: 1 sz: 4} = 1;
> - # T.0_20 = V_MAY_DEF <T.0_19>;
> - T.0[8]{lb: 1 sz: 4} = 1;
> - # T.0_21 = V_MAY_DEF <T.0_20>;
> - T.0[9]{lb: 1 sz: 4} = 1;
> - # T.0_22 = V_MAY_DEF <T.0_21>;
> - T.0[10]{lb: 1 sz: 4} = 1;
> R12b_23 = &T.0;
> R12b.1_24 = (SIGNED_64)R12b_23;
> R12b.2_25 = (system__address)R12b.1_24;
> var_ara_1.3_26 = (SIGNED_64)&var_ara_1;
> var_ara_1.4_27 = (system__address)var_ara_1.3_26;
> # var_ara_1_29 = V_MAY_DEF <var_ara_1_11>;
> T.5_28 = system__compare_array_signed_32__compare_array_s32 (var_ara_1.4_27,
> R12b.2_25, 10, 10);
> --- 42,55 ----
>
Something has definitely changed upstream from the optimizers. I don't
get anything anywhere close to this IL. Could you give me another test
case?
Thanks. Diego.