http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46194
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org,
| |spop at gcc dot gnu.org
--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> 2010-12-31
12:01:51 UTC ---
This shouldn't be parallelized, the loop clearly is not parallelizable. But we
have:
(Data Dep:
#(Data Ref:
# stmt: D.2709_5 = a[i_16];
# ref: a[i_16];
# base_object: a
# Access function 0: {0, +, 1}_1
#)
#(Data Ref:
# stmt: a[j_20] = D.2710_6;
# ref: a[j_20];
# base_object: a
# Access function 0: {0, +, 1}_2
#)
access_fn_A: {0, +, 1}_1
access_fn_B: {0, +, 1}_2
(subscript
iterations_that_access_an_element_twice_in_A: [0 + 1 * x_1]
last_conflict: 1000
iterations_that_access_an_element_twice_in_B: [0 + 1 * x_1]
last_conflict: 1000
(Subscript distance: 0
)
)
inner loop index: 0
loop nest: (1 2 )
distance_vector: 0 0
direction_vector: = =
)
(Data Dep:
#(Data Ref:
# stmt: D.2709_5 = a[i_16];
# ref: a[i_16];
# base_object: a
# Access function 0: {0, +, 1}_1
#)
#(Data Ref:
# stmt: D.2709_5 = a[i_16];
# ref: a[i_16];
# base_object: a
# Access function 0: {0, +, 1}_1
#)
inner loop index: 0
loop nest: (1 2 )
distance_vector: 0 0
direction_vector: + +
)
(Data Dep:
#(Data Ref:
# stmt: a[j_20] = D.2710_6;
# ref: a[j_20];
# base_object: a
# Access function 0: {0, +, 1}_2
#)
#(Data Ref:
# stmt: a[j_20] = D.2710_6;
# ref: a[j_20];
# base_object: a
# Access function 0: {0, +, 1}_2
#)
inner loop index: 0
loop nest: (1 2 )
distance_vector: 0 0
direction_vector: + +
)
SUCCESS: may be parallelized
