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[Bug middle-end/23412] [data deps] Overflow problem in Omega
- From: "sebastian dot pop at cri dot ensmp dot fr" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 15 Aug 2005 23:16:36 -0000
- Subject: [Bug middle-end/23412] [data deps] Overflow problem in Omega
- References: <20050815230718.23412.sebastian.pop@cri.ensmp.fr>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Additional Comments From sebastian dot pop at cri dot ensmp dot fr 2005-08-15 23:16 -------
This one is also probably an overflow in Omega,
but the dependence problem looks pretty simple...
This occurs in gcc/gcc/omega.c on amd64-linux.
Dist vectors from the first dependence analyzer:
1 1 0
Omega dist vectors are not the same:
0 10922 10922
Data dependence relation is:
(Data Dep:
access_fn_A: {1, +, 1}_7
access_fn_B: {1, +, 1}_7
(subscript
iterations_that_access_an_element_twice_in_A: 0
last_conflict: scev_not_known;
iterations_that_access_an_element_twice_in_B: 0
last_conflict: scev_not_known;
(Subscript distance: 0
)
)
distance_vect: 0 10922 10922
direction_vect: = + +
)
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23412