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[Bug tree-optimization/19790] equality not noticed when signedness differs.
- From: "pinskia at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 4 May 2005 20:31:37 -0000
- Subject: [Bug tree-optimization/19790] equality not noticed when signedness differs.
- References: <20050206132852.19790.kazu@cs.umass.edu>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Additional Comments From pinskia at gcc dot gnu dot org 2005-05-04 20:31 -------
We get:
i_3 = i_6 + 1;
bar (i_3);
D.1284_20 = (unsigned int) i_3;
i.0_25 = D.1284_20 + 0ffffffff;
D.1241_5 = i.0_25 >> 5;
D.1242_10 = D.1241_5 * 4;
D.1243_11 = (int *) D.1242_10;
D.1244_12 = array_8 + D.1243_11;
D.1245_13 = *D.1244_12;
D.1246_14 = (long unsigned int) D.1245_13;
D.1247_15 = i_6 & 31;
D.1248_16 = 1 << D.1247_15;
D.1249_17 = D.1246_14 | D.1248_16;
D.1250_18 = (int) D.1249_17;
*D.1244_12 = D.1250_18;
Now, which is semi better in that there is no extra cast but there is still a -1 issue, i.0_25 = (unsigned)
i_6
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19790