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lambda-code.c (lambda_transform_legal_p): Use DDR_NUM_DIST_VECTS for testing whether the data_dependence_relation... 

* lambda-code.c (lambda_transform_legal_p): Use DDR_NUM_DIST_VECTS
	for testing whether the data_dependence_relation contains distance
	vectors.  Iterate over all distance vectors of the ddr.
	* lambda.h: Define a vec of lambda_vector pointers.
	* tree-data-ref.c (dump_data_dependence_relation,
	dump_data_dependence_direction): Iterate over all distance and
	direction vectors of the ddr.
	(initialize_data_dependence_relation): Initialize DDR_DIR_VECTS and
	DDR_DIST_VECTS.
	(build_classic_dist_vector, build_classic_dir_vector): Push a set
	of distance/direction vectors instead of a single one.
	* tree-data-ref.h (dir_vects, dist_vects): Replace dir/dist 
	lambda_vectors with a vec of lambda_vectors.
	(DDR_DIR_VECT, DDR_DIST_VECT): Redefined as operations on vec.
	(DDR_DIR_VECTS, DDR_DIST_VECTS, DDR_NUM_DIR_VECTS,
	DDR_NUM_DIST_VECTS): New.
	* tree-loop-linear.c (gather_interchange_stats): Test for the
	existence of distance vectors only after having checked that there
	is a dependence.  Iterate over all distance vectors of the ddr.
	(linear_transform_loops): Use dump_data_dependence_relation.
	* tree-vect-analyze.c (vect_analyze_data_ref_dependence): Test for
	distance vectors using DDR_NUM_DIST_VECTS.  Iterate over all the
	distance vectors of the ddr.

From-SVN: r106530
This commit is contained in:
Sebastian Pop 2005-11-05 17:50:47 +01:00 committed by Sebastian Pop
parent 541c886c9f
commit 304afda64b
7 changed files with 255 additions and 159 deletions
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26
gcc/ChangeLog
View File

@ -1,3 +1,29 @@
2005-11-05 Sebastian Pop <pop@cri.ensmp.fr>
* lambda-code.c (lambda_transform_legal_p): Use DDR_NUM_DIST_VECTS
for testing whether the data_dependence_relation contains distance
vectors. Iterate over all distance vectors of the ddr.
* lambda.h: Define a vec of lambda_vector pointers.
* tree-data-ref.c (dump_data_dependence_relation,
dump_data_dependence_direction): Iterate over all distance and
direction vectors of the ddr.
(initialize_data_dependence_relation): Initialize DDR_DIR_VECTS and
DDR_DIST_VECTS.
(build_classic_dist_vector, build_classic_dir_vector): Push a set
of distance/direction vectors instead of a single one.
* tree-data-ref.h (dir_vects, dist_vects): Replace dir/dist
lambda_vectors with a vec of lambda_vectors.
(DDR_DIR_VECT, DDR_DIST_VECT): Redefined as operations on vec.
(DDR_DIR_VECTS, DDR_DIST_VECTS, DDR_NUM_DIR_VECTS,
DDR_NUM_DIST_VECTS): New.
* tree-loop-linear.c (gather_interchange_stats): Test for the
existence of distance vectors only after having checked that there
is a dependence. Iterate over all distance vectors of the ddr.
(linear_transform_loops): Use dump_data_dependence_relation.
* tree-vect-analyze.c (vect_analyze_data_ref_dependence): Test for
distance vectors using DDR_NUM_DIST_VECTS. Iterate over all the
distance vectors of the ddr.
2005-11-05 Bernd Schmidt <bernd.schmidt@analog.com>
* config/bfin/bfin.c (n_dregs_to_save, n_pregs_to_save,

15
gcc/lambda-code.c
View File

@ -2591,7 +2591,7 @@ lambda_transform_legal_p (lambda_trans_matrix trans,
int nb_loops,
varray_type dependence_relations)
{
unsigned int i;
unsigned int i, j;
lambda_vector distres;
struct data_dependence_relation *ddr;
@ -2628,15 +2628,18 @@ lambda_transform_legal_p (lambda_trans_matrix trans,
/* If the dependence could not be captured by a distance vector,
conservatively answer that the transform is not valid. */
if (DDR_DIST_VECT (ddr) == NULL)
if (DDR_NUM_DIST_VECTS (ddr) == 0)
return false;
/* Compute trans.dist_vect */
lambda_matrix_vector_mult (LTM_MATRIX (trans), nb_loops, nb_loops,
DDR_DIST_VECT (ddr), distres);
for (j = 0; j < DDR_NUM_DIST_VECTS (ddr); j++)
{
lambda_matrix_vector_mult (LTM_MATRIX (trans), nb_loops, nb_loops,
DDR_DIST_VECT (ddr, j), distres);
if (!lambda_vector_lexico_pos (distres, nb_loops))
return false;
if (!lambda_vector_lexico_pos (distres, nb_loops))
return false;
}
}
return true;
}

3
gcc/lambda.h
View File

@ -30,6 +30,9 @@ Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
integers. */
typedef int *lambda_vector;
DEF_VEC_P(lambda_vector);
DEF_VEC_ALLOC_P(lambda_vector,heap);
/* An integer matrix. A matrix consists of m vectors of length n (IE
all vectors are the same length). */
typedef lambda_vector *lambda_matrix;

223
gcc/tree-data-ref.c
View File

@ -626,6 +626,7 @@ dump_data_dependence_relation (FILE *outf,
else if (DDR_ARE_DEPENDENT (ddr) == NULL_TREE)
{
unsigned int i;
for (i = 0; i < DDR_NUM_SUBSCRIPTS (ddr); i++)
{
fprintf (outf, " access_fn_A: ");
@ -634,15 +635,19 @@ dump_data_dependence_relation (FILE *outf,
print_generic_stmt (outf, DR_ACCESS_FN (drb, i), 0);
dump_subscript (outf, DDR_SUBSCRIPT (ddr, i));
}
if (DDR_DIST_VECT (ddr))
for (i = 0; i < DDR_NUM_DIST_VECTS (ddr); i++)
{
fprintf (outf, " distance_vect: ");
print_lambda_vector (outf, DDR_DIST_VECT (ddr), DDR_SIZE_VECT (ddr));
fprintf (outf, " distance_vector: ");
print_lambda_vector (outf, DDR_DIST_VECT (ddr, i),
DDR_SIZE_VECT (ddr));
}
if (DDR_DIR_VECT (ddr))
for (i = 0; i < DDR_NUM_DIR_VECTS (ddr); i++)
{
fprintf (outf, " direction_vect: ");
print_lambda_vector (outf, DDR_DIR_VECT (ddr), DDR_SIZE_VECT (ddr));
fprintf (outf, " direction_vector: ");
print_lambda_vector (outf, DDR_DIR_VECT (ddr, i),
DDR_SIZE_VECT (ddr));
}
}
@ -700,7 +705,7 @@ dump_data_dependence_direction (FILE *file,
void
dump_dist_dir_vectors (FILE *file, varray_type ddrs)
{
unsigned int i;
unsigned int i, j;
for (i = 0; i < VARRAY_ACTIVE_SIZE (ddrs); i++)
{
@ -710,12 +715,21 @@ dump_dist_dir_vectors (FILE *file, varray_type ddrs)
if (DDR_ARE_DEPENDENT (ddr) == NULL_TREE
&& DDR_AFFINE_P (ddr))
{
fprintf (file, "DISTANCE_V (");
print_lambda_vector (file, DDR_DIST_VECT (ddr), DDR_SIZE_VECT (ddr));
fprintf (file, ")\n");
fprintf (file, "DIRECTION_V (");
print_lambda_vector (file, DDR_DIR_VECT (ddr), DDR_SIZE_VECT (ddr));
fprintf (file, ")\n");
for (j = 0; j < DDR_NUM_DIST_VECTS (ddr); j++)
{
fprintf (file, "DISTANCE_V (");
print_lambda_vector (file, DDR_DIST_VECT (ddr, j),
DDR_SIZE_VECT (ddr));
fprintf (file, ")\n");
}
for (j = 0; j < DDR_NUM_DIR_VECTS (ddr); j++)
{
fprintf (file, "DIRECTION_V (");
print_lambda_vector (file, DDR_DIR_VECT (ddr, j),
DDR_SIZE_VECT (ddr));
fprintf (file, ")\n");
}
}
}
fprintf (file, "\n\n");
@ -1999,9 +2013,9 @@ initialize_data_dependence_relation (struct data_reference *a,
DDR_ARE_DEPENDENT (res) = NULL_TREE;
DDR_SUBSCRIPTS_VECTOR_INIT (res, DR_NUM_DIMENSIONS (a));
DDR_SIZE_VECT (res) = 0;
DDR_DIST_VECT (res) = NULL;
DDR_DIR_VECT (res) = NULL;
DDR_DIR_VECTS (res) = NULL;
DDR_DIST_VECTS (res) = NULL;
for (i = 0; i < DR_NUM_DIMENSIONS (a); i++)
{
struct subscript *subscript;
@ -3088,7 +3102,9 @@ build_classic_dist_vector (struct data_dependence_relation *ddr,
{
unsigned i;
lambda_vector dist_v, init_v;
bool init_b = false;
DDR_SIZE_VECT (ddr) = nb_loops;
dist_v = lambda_vector_new (nb_loops);
init_v = lambda_vector_new (nb_loops);
lambda_vector_clear (dist_v, nb_loops);
@ -3186,9 +3202,38 @@ build_classic_dist_vector (struct data_dependence_relation *ddr,
dist_v[loop_depth] = dist;
init_v[loop_depth] = 1;
init_b = true;
}
}
/* Save the distance vector if we initialized one. */
if (init_b)
{
lambda_vector save_v;
/* Verify a basic constraint: classic distance vectors should always
be lexicographically positive. */
if (!lambda_vector_lexico_pos (dist_v, DDR_SIZE_VECT (ddr)))
{
if (DDR_SIZE_VECT (ddr) == 1)
/* This one is simple to fix, and can be fixed.
Multidimensional arrays cannot be fixed that simply. */
lambda_vector_negate (dist_v, dist_v, DDR_SIZE_VECT (ddr));
else
/* This is not valid: we need the delta test for properly
fixing all this. */
return false;
}
save_v = lambda_vector_new (DDR_SIZE_VECT (ddr));
lambda_vector_copy (dist_v, save_v, DDR_SIZE_VECT (ddr));
VEC_safe_push (lambda_vector, heap, DDR_DIST_VECTS (ddr), save_v);
/* There is nothing more to do when there are no outer loops. */
if (DDR_SIZE_VECT (ddr) == 1)
goto classic_dist_done;
}
/* There is a distance of 1 on all the outer loops:
Example: there is a dependence of distance 1 on loop_1 for the array A.
@ -3206,59 +3251,63 @@ build_classic_dist_vector (struct data_dependence_relation *ddr,
/* Get the common ancestor loop. */
lca = find_common_loop (loop_a, loop_b);
lca_depth = lca->depth;
lca_depth -= first_loop_depth;
lca_depth = lca->depth - first_loop_depth;
gcc_assert (lca_depth >= 0);
gcc_assert (lca_depth < nb_loops);
/* For each outer loop where init_v is not set, the accesses are
in dependence of distance 1 in the loop. */
if (lca != loop_a
&& lca != loop_b
&& init_v[lca_depth] == 0)
dist_v[lca_depth] = 1;
lca = lca->outer;
if (lca)
while (lca->depth != 0)
{
lca_depth = lca->depth - first_loop_depth;
while (lca->depth != 0)
/* If we're considering just a sub-nest, then don't record
any information on the outer loops. */
if (lca_depth < 0)
break;
gcc_assert (lca_depth < nb_loops);
/* If we haven't yet determined a distance for this outer
loop, push a new distance vector composed of the previous
distance, and a distance of 1 for this outer loop.
Example:
| loop_1
| loop_2
| A[10]
| endloop_2
| endloop_1
Saved vectors are of the form (dist_in_1, dist_in_2).
First, we save (0, 1), then we have to save (1, 0). */
if (init_v[lca_depth] == 0)
{
/* If we're considering just a sub-nest, then don't record
any information on the outer loops. */
if (lca_depth < 0)
break;
lambda_vector save_v = lambda_vector_new (DDR_SIZE_VECT (ddr));
gcc_assert (lca_depth < nb_loops);
if (init_v[lca_depth] == 0)
dist_v[lca_depth] = 1;
lca = lca->outer;
lca_depth = lca->depth - first_loop_depth;
lambda_vector_copy (dist_v, save_v, DDR_SIZE_VECT (ddr));
save_v[lca_depth] = 1;
VEC_safe_push (lambda_vector, heap, DDR_DIST_VECTS (ddr), save_v);
}
lca = lca->outer;
lca_depth = lca->depth - first_loop_depth;
}
}
DDR_DIST_VECT (ddr) = dist_v;
DDR_SIZE_VECT (ddr) = nb_loops;
/* Verify a basic constraint: classic distance vectors should always
be lexicographically positive. */
if (!lambda_vector_lexico_pos (DDR_DIST_VECT (ddr),
DDR_SIZE_VECT (ddr)))
classic_dist_done:;
if (dump_file && (dump_flags & TDF_DETAILS))
{
if (DDR_SIZE_VECT (ddr) == 1)
/* This one is simple to fix, and can be fixed.
Multidimensional arrays cannot be fixed that simply. */
lambda_vector_negate (DDR_DIST_VECT (ddr), DDR_DIST_VECT (ddr),
DDR_SIZE_VECT (ddr));
else
/* This is not valid: we need the delta test for properly
fixing all this. */
return false;
fprintf (dump_file, "(build_classic_dist_vector\n");
for (i = 0; i < DDR_NUM_DIST_VECTS (ddr); i++)
{
fprintf (dump_file, " dist_vector = (");
print_lambda_vector (dump_file, DDR_DIST_VECT (ddr, i),
DDR_SIZE_VECT (ddr));
fprintf (dump_file, " )\n");
}
fprintf (dump_file, ")\n");
}
return true;
@ -3280,11 +3329,14 @@ build_classic_dir_vector (struct data_dependence_relation *ddr,
{
unsigned i;
lambda_vector dir_v, init_v;
bool init_b = false;
dir_v = lambda_vector_new (nb_loops);
init_v = lambda_vector_new (nb_loops);
lambda_vector_clear (dir_v, nb_loops);
lambda_vector_clear (init_v, nb_loops);
DDR_SIZE_VECT (ddr) = nb_loops;
if (DDR_ARE_DEPENDENT (ddr) != NULL_TREE)
return true;
@ -3388,9 +3440,19 @@ build_classic_dir_vector (struct data_dependence_relation *ddr,
dir_v[loop_depth] = dir;
init_v[loop_depth] = 1;
init_b = true;
}
}
/* Save the direction vector if we initialized one. */
if (init_b)
{
lambda_vector save_v = lambda_vector_new (DDR_SIZE_VECT (ddr));
lambda_vector_copy (dir_v, save_v, DDR_SIZE_VECT (ddr));
VEC_safe_push (lambda_vector, heap, DDR_DIR_VECTS (ddr), save_v);
}
/* There is a distance of 1 on all the outer loops:
Example: there is a dependence of distance 1 on loop_1 for the array A.
@ -3413,37 +3475,30 @@ build_classic_dir_vector (struct data_dependence_relation *ddr,
gcc_assert (lca_depth >= 0);
gcc_assert (lca_depth < nb_loops);
/* For each outer loop where init_v is not set, the accesses are
in dependence of distance 1 in the loop. */
if (lca != loop_a
&& lca != loop_b
&& init_v[lca_depth] == 0)
dir_v[lca_depth] = dir_positive;
lca = lca->outer;
if (lca)
while (lca->depth != 0)
{
lca_depth = lca->depth - first_loop_depth;
while (lca->depth != 0)
/* If we're considering just a sub-nest, then don't record
any information on the outer loops. */
if (lca_depth < 0)
break;
gcc_assert (lca_depth < nb_loops);
if (init_v[lca_depth] == 0)
{
/* If we're considering just a sub-nest, then don't record
any information on the outer loops. */
if (lca_depth < 0)
break;
lambda_vector save_v = lambda_vector_new (DDR_SIZE_VECT (ddr));
gcc_assert (lca_depth < nb_loops);
if (init_v[lca_depth] == 0)
dir_v[lca_depth] = dir_positive;
lca = lca->outer;
lca_depth = lca->depth - first_loop_depth;
lambda_vector_copy (dir_v, save_v, DDR_SIZE_VECT (ddr));
save_v[lca_depth] = dir_positive;
VEC_safe_push (lambda_vector, heap, DDR_DIR_VECTS (ddr), save_v);
}
lca = lca->outer;
lca_depth = lca->depth - first_loop_depth;
}
}
DDR_DIR_VECT (ddr) = dir_v;
DDR_SIZE_VECT (ddr) = nb_loops;
return true;
}

20
gcc/tree-data-ref.h
View File

@ -217,14 +217,15 @@ struct data_dependence_relation
the data_dependence_relation. */
varray_type subscripts;
/* The size of the direction/distance vectors. */
/* The size of the direction/distance vectors: the depth of the
analyzed loop nest. */
int size_vect;
/* The classic direction vector. */
lambda_vector dir_vect;
VEC(lambda_vector,heap) *dir_vects;
/* The classic distance vector. */
lambda_vector dist_vect;
VEC(lambda_vector,heap) *dist_vects;
};
#define DDR_A(DDR) DDR->a
@ -237,8 +238,17 @@ struct data_dependence_relation
#define DDR_SUBSCRIPT(DDR, I) VARRAY_GENERIC_PTR (DDR_SUBSCRIPTS (DDR), I)
#define DDR_NUM_SUBSCRIPTS(DDR) VARRAY_ACTIVE_SIZE (DDR_SUBSCRIPTS (DDR))
#define DDR_SIZE_VECT(DDR) DDR->size_vect
#define DDR_DIR_VECT(DDR) DDR->dir_vect
#define DDR_DIST_VECT(DDR) DDR->dist_vect
#define DDR_DIST_VECTS(DDR) ((DDR)->dist_vects)
#define DDR_DIR_VECTS(DDR) ((DDR)->dir_vects)
#define DDR_NUM_DIST_VECTS(DDR) \
(VEC_length (lambda_vector, DDR_DIST_VECTS (DDR)))
#define DDR_NUM_DIR_VECTS(DDR) \
(VEC_length (lambda_vector, DDR_DIR_VECTS (DDR)))
#define DDR_DIR_VECT(DDR, I) \
VEC_index (lambda_vector, DDR_DIR_VECTS (DDR), I)
#define DDR_DIST_VECT(DDR, I) \
VEC_index (lambda_vector, DDR_DIST_VECTS (DDR), I)

43
gcc/tree-loop-linear.c
View File

@ -98,7 +98,7 @@ gather_interchange_stats (varray_type dependence_relations,
unsigned int *nb_deps_not_carried_by_loop,
unsigned int *access_strides)
{
unsigned int i;
unsigned int i, j;
*dependence_steps = 0;
*nb_deps_not_carried_by_loop = 0;
@ -106,7 +106,6 @@ gather_interchange_stats (varray_type dependence_relations,
for (i = 0; i < VARRAY_ACTIVE_SIZE (dependence_relations); i++)
{
int dist;
struct data_dependence_relation *ddr =
(struct data_dependence_relation *)
VARRAY_GENERIC_PTR (dependence_relations, i);
@ -114,21 +113,24 @@ gather_interchange_stats (varray_type dependence_relations,
/* If we don't know anything about this dependence, or the distance
vector is NULL, or there is no dependence, then there is no reuse of
data. */
if (DDR_DIST_VECT (ddr) == NULL
|| DDR_ARE_DEPENDENT (ddr) == chrec_dont_know
|| DDR_ARE_DEPENDENT (ddr) == chrec_known)
if (DDR_ARE_DEPENDENT (ddr) == chrec_dont_know
|| DDR_ARE_DEPENDENT (ddr) == chrec_known
|| DDR_NUM_DIST_VECTS (ddr) == 0)
continue;
dist = DDR_DIST_VECT (ddr)[loop->depth - first_loop->depth];
if (dist == 0)
(*nb_deps_not_carried_by_loop) += 1;
else if (dist < 0)
(*dependence_steps) += -dist;
else
(*dependence_steps) += dist;
for (j = 0; j < DDR_NUM_DIST_VECTS (ddr); j++)
{
int dist = DDR_DIST_VECT (ddr, j)[loop->depth - first_loop->depth];
if (dist == 0)
(*nb_deps_not_carried_by_loop) += 1;
else if (dist < 0)
(*dependence_steps) += -dist;
else
(*dependence_steps) += dist;
}
}
/* Compute the access strides. */
@ -307,16 +309,7 @@ linear_transform_loops (struct loops *loops)
VARRAY_GENERIC_PTR (dependence_relations, j);
if (DDR_ARE_DEPENDENT (ddr) == NULL_TREE)
{
fprintf (dump_file, "DISTANCE_V (");
print_lambda_vector (dump_file, DDR_DIST_VECT (ddr),
DDR_SIZE_VECT (ddr));
fprintf (dump_file, ")\n");
fprintf (dump_file, "DIRECTION_V (");
print_lambda_vector (dump_file, DDR_DIR_VECT (ddr),
DDR_SIZE_VECT (ddr));
fprintf (dump_file, ")\n");
}
dump_data_dependence_relation (dump_file, ddr);
}
fprintf (dump_file, "\n\n");
}

84
gcc/tree-vect-analyze.c
View File

@ -570,9 +570,9 @@ static bool
vect_analyze_data_ref_dependence (struct data_dependence_relation *ddr,
loop_vec_info loop_vinfo)
{
unsigned int i;
struct loop *loop = LOOP_VINFO_LOOP (loop_vinfo);
int vectorization_factor = LOOP_VINFO_VECT_FACTOR (loop_vinfo);
int dist = 0;
unsigned int loop_depth = 0;
struct loop *loop_nest = loop;
struct data_reference *dra = DDR_A (ddr);
@ -596,7 +596,7 @@ vect_analyze_data_ref_dependence (struct data_dependence_relation *ddr,
return true;
}
if (!DDR_DIST_VECT (ddr))
if (DDR_NUM_DIST_VECTS (ddr) == 0)
{
if (vect_print_dump_info (REPORT_UNVECTORIZED_LOOPS))
{
@ -614,48 +614,54 @@ vect_analyze_data_ref_dependence (struct data_dependence_relation *ddr,
loop_nest = loop_nest->outer;
loop_depth++;
}
dist = DDR_DIST_VECT (ddr)[loop_depth];
if (vect_print_dump_info (REPORT_DR_DETAILS))
fprintf (vect_dump, "dependence distance = %d.",dist);
/* Same loop iteration. */
if (dist % vectorization_factor == 0)
for (i = 0; i < DDR_NUM_DIST_VECTS (ddr); i++)
{
/* Two references with distance zero have the same alignment. */
VEC_safe_push (dr_p, heap, STMT_VINFO_SAME_ALIGN_REFS (stmtinfo_a), drb);
VEC_safe_push (dr_p, heap, STMT_VINFO_SAME_ALIGN_REFS (stmtinfo_b), dra);
if (vect_print_dump_info (REPORT_ALIGNMENT))
fprintf (vect_dump, "accesses have the same alignment.");
if (vect_print_dump_info (REPORT_DR_DETAILS))
{
fprintf (vect_dump, "dependence distance modulo vf == 0 between ");
print_generic_expr (vect_dump, DR_REF (dra), TDF_SLIM);
fprintf (vect_dump, " and ");
print_generic_expr (vect_dump, DR_REF (drb), TDF_SLIM);
}
return false;
}
int dist = DDR_DIST_VECT (ddr, i)[loop_depth];
if (abs (dist) >= vectorization_factor)
{
/* Dependence distance does not create dependence, as far as vectorization
is concerned, in this case. */
if (vect_print_dump_info (REPORT_DR_DETAILS))
fprintf (vect_dump, "dependence distance >= VF.");
return false;
fprintf (vect_dump, "dependence distance = %d.", dist);
/* Same loop iteration. */
if (dist % vectorization_factor == 0)
{
/* Two references with distance zero have the same alignment. */
VEC_safe_push (dr_p, heap, STMT_VINFO_SAME_ALIGN_REFS (stmtinfo_a), drb);
VEC_safe_push (dr_p, heap, STMT_VINFO_SAME_ALIGN_REFS (stmtinfo_b), dra);
if (vect_print_dump_info (REPORT_ALIGNMENT))
fprintf (vect_dump, "accesses have the same alignment.");
if (vect_print_dump_info (REPORT_DR_DETAILS))
{
fprintf (vect_dump, "dependence distance modulo vf == 0 between ");
print_generic_expr (vect_dump, DR_REF (dra), TDF_SLIM);
fprintf (vect_dump, " and ");
print_generic_expr (vect_dump, DR_REF (drb), TDF_SLIM);
}
continue;
}
if (abs (dist) >= vectorization_factor)
{
/* Dependence distance does not create dependence, as far as vectorization
is concerned, in this case. */
if (vect_print_dump_info (REPORT_DR_DETAILS))
fprintf (vect_dump, "dependence distance >= VF.");
continue;
}
if (vect_print_dump_info (REPORT_UNVECTORIZED_LOOPS))
{
fprintf (vect_dump,
"not vectorized: possible dependence between data-refs ");
print_generic_expr (vect_dump, DR_REF (dra), TDF_SLIM);
fprintf (vect_dump, " and ");
print_generic_expr (vect_dump, DR_REF (drb), TDF_SLIM);
}
return true;
}
if (vect_print_dump_info (REPORT_UNVECTORIZED_LOOPS))
{
fprintf (vect_dump,
"not vectorized: possible dependence between data-refs ");
print_generic_expr (vect_dump, DR_REF (dra), TDF_SLIM);
fprintf (vect_dump, " and ");
print_generic_expr (vect_dump, DR_REF (drb), TDF_SLIM);
}
return true;
return false;
}