#include "graphite-poly.h"
#include "graphite-dependences.h"
-/* Creates a new polyhedral data reference pair and
- returns it. Parameter SOURCE denotes a source data reference
- while parameter SINK denotes a sink data reference. Both
- SOURCE and SINK define a pair of references, thus they
- define an edge in DDG (Data Dependence Graph). */
-
-static poly_dr_pair_p
-new_poly_dr_pair (poly_dr_p source,
- poly_dr_p sink,
- ppl_Pointset_Powerset_C_Polyhedron_t ddp)
+/* Returns a new polyhedral Data Dependence Relation (DDR). SOURCE is
+ the source data reference, SINK is the sink data reference. SOURCE
+ and SINK define an edge in the Data Dependence Graph (DDG). */
+
+static poly_ddr_p
+new_poly_ddr (poly_dr_p source, poly_dr_p sink,
+ ppl_Pointset_Powerset_C_Polyhedron_t ddp)
{
- poly_dr_pair_p pdrpp;
+ poly_ddr_p pddr;
+
+ pddr = XNEW (struct poly_ddr);
+ PDDR_SOURCE (pddr) = source;
+ PDDR_SINK (pddr) = sink;
+ PDDR_DDP (pddr) = ddp;
+ PDDR_KIND (pddr) = unknown_dependence;
+
+ return pddr;
+}
- pdrpp = XNEW (struct poly_dr_pair);
- pdrpp->source = source;
- pdrpp->sink = sink;
- pdrpp->ddp = ddp;
+/* Free the poly_ddr_p P. */
- return pdrpp;
+void
+free_poly_ddr (void *p)
+{
+ poly_ddr_p pddr = (poly_ddr_p) p;
+ ppl_delete_Pointset_Powerset_C_Polyhedron (PDDR_DDP (pddr));
+ free (pddr);
}
-/* Comparison function for poly_dr_pair hash table. */
+/* Comparison function for poly_ddr hash table. */
int
-eq_poly_dr_pair_p (const void *pdrpp1, const void *pdrpp2)
+eq_poly_ddr_p (const void *pddr1, const void *pddr2)
{
- const struct poly_dr_pair *p1 = (const struct poly_dr_pair *) pdrpp1;
- const struct poly_dr_pair *p2 = (const struct poly_dr_pair *) pdrpp2;
+ const struct poly_ddr *p1 = (const struct poly_ddr *) pddr1;
+ const struct poly_ddr *p2 = (const struct poly_ddr *) pddr2;
- return (p1->source == p2->source
- && p1->sink == p2->sink);
+ return (PDDR_SOURCE (p1) == PDDR_SOURCE (p2)
+ && PDDR_SINK (p1) == PDDR_SINK (p2));
}
-/* Hash function for poly_dr_pair hashtable. */
+/* Hash function for poly_ddr hashtable. */
hashval_t
-hash_poly_dr_pair_p (const void *pdrpp)
+hash_poly_ddr_p (const void *pddr)
{
- const struct poly_dr_pair *p = (const struct poly_dr_pair *) pdrpp;
+ const struct poly_ddr *p = (const struct poly_ddr *) pddr;
+
+ return (hashval_t) ((long) PDDR_SOURCE (p) + (long) PDDR_SINK (p));
+}
+
+/* Returns true when PDDR has no dependence. */
- return (hashval_t) ((long) p->source + (long) p->sink);
+static bool
+pddr_is_empty (poly_ddr_p pddr)
+{
+ if (PDDR_KIND (pddr) != unknown_dependence)
+ return PDDR_KIND (pddr) == no_dependence ? true : false;
+
+ if (ppl_Pointset_Powerset_C_Polyhedron_is_empty (PDDR_DDP (pddr)))
+ {
+ PDDR_KIND (pddr) = no_dependence;
+ return true;
+ }
+
+ PDDR_KIND (pddr) = has_dependence;
+ return false;
}
/* Returns a polyhedron of dimension DIM.
/* Build the dependence polyhedron for data references PDR1 and PDR2. */
-static ppl_Pointset_Powerset_C_Polyhedron_t
+static poly_ddr_p
dependence_polyhedron_1 (poly_bb_p pbb1, poly_bb_p pbb2,
ppl_Pointset_Powerset_C_Polyhedron_t d1,
ppl_Pointset_Powerset_C_Polyhedron_t d2,
if (!ppl_Pointset_Powerset_C_Polyhedron_is_empty (res))
build_lexicographically_gt_constraint (&res, dim, MIN (tdim1, tdim2),
tdim1 + ddim1, direction);
- return res;
+
+ return new_poly_ddr (pdr1, pdr2, res);
}
/* Build the dependence polyhedron for data references PDR1 and PDR2.
If possible use already cached information. */
-static ppl_Pointset_Powerset_C_Polyhedron_t
+static poly_ddr_p
dependence_polyhedron (poly_bb_p pbb1, poly_bb_p pbb2,
ppl_Pointset_Powerset_C_Polyhedron_t d1,
ppl_Pointset_Powerset_C_Polyhedron_t d2,
bool direction,
bool original_scattering_p)
{
- poly_dr_pair tmp;
PTR *x = NULL;
- ppl_Pointset_Powerset_C_Polyhedron_t res;
+ poly_ddr_p res;
if (original_scattering_p)
{
+ struct poly_ddr tmp;
+
tmp.source = pdr1;
tmp.sink = pdr2;
- x = htab_find_slot (SCOP_ORIGINAL_PDR_PAIRS (PBB_SCOP (pbb1)),
+ x = htab_find_slot (SCOP_ORIGINAL_PDDRS (PBB_SCOP (pbb1)),
&tmp, INSERT);
if (x && *x)
- {
- if (dump_file && (dump_flags & TDF_DETAILS))
- fprintf (dump_file, "\nddp cache: hit.\n");
- return ((poly_dr_pair *)*x)->ddp;
- }
- else if (dump_file && (dump_flags & TDF_DETAILS))
- fprintf (dump_file, "\nddp cache: miss.\n");
+ return (poly_ddr_p) *x;
}
res = dependence_polyhedron_1 (pbb1, pbb2, d1, d2, pdr1, pdr2,
s1, s2, direction, original_scattering_p);
if (original_scattering_p)
- {
- gcc_assert (x && *x == NULL);
- *x = new_poly_dr_pair (pdr1, pdr2, res);
-
- if (dump_file && (dump_flags & TDF_DETAILS))
- fprintf (dump_file, "\nddp cache: add element.\n");
- }
+ *x = res;
return res;
}
poly_dr_p pdr1, poly_dr_p pdr2)
{
ppl_Polyhedron_t st1, st2;
- ppl_Pointset_Powerset_C_Polyhedron_t pt;
+ ppl_Pointset_Powerset_C_Polyhedron_t po, pt;
graphite_dim_t ddim1, otdim1, otdim2, ttdim1, ttdim2;
ppl_Pointset_Powerset_C_Polyhedron_t temp;
ppl_dimension_type pdim;
bool is_empty_p;
- ppl_Pointset_Powerset_C_Polyhedron_t po;
+ poly_ddr_p pddr;
ppl_Pointset_Powerset_C_Polyhedron_t d1 = PBB_DOMAIN (pbb1);
ppl_Pointset_Powerset_C_Polyhedron_t d2 = PBB_DOMAIN (pbb2);
if (sdim1 != sdim2)
return true;
- po = dependence_polyhedron (pbb1, pbb2, d1, d2, pdr1, pdr2, so1, so2,
- true, true);
-
- if (ppl_Pointset_Powerset_C_Polyhedron_is_empty (po))
+ pddr = dependence_polyhedron (pbb1, pbb2, d1, d2, pdr1, pdr2, so1, so2,
+ true, true);
+ if (pddr_is_empty (pddr))
return true;
+ po = PDDR_DDP (pddr);
+
if (dump_file && (dump_flags & TDF_DETAILS))
fprintf (dump_file, "\nloop carries dependency.\n");
ppl_new_Pointset_Powerset_C_Polyhedron_from_space_dimension (&temp, pdim, 0);
ppl_Pointset_Powerset_C_Polyhedron_intersection_assign (temp, po);
- pt = dependence_polyhedron (pbb1, pbb2, d1, d2, pdr1, pdr2, st1, st2,
- false, false);
+ pddr = dependence_polyhedron (pbb1, pbb2, d1, d2, pdr1, pdr2, st1, st2,
+ false, false);
+ pt = PDDR_DDP (pddr);
/* Extend PO and PT to have the same dimensions. */
ppl_insert_dimensions_pointset (temp, otdim1, ttdim1);
is_empty_p = ppl_Pointset_Powerset_C_Polyhedron_is_empty (temp);
ppl_delete_Pointset_Powerset_C_Polyhedron (temp);
- ppl_delete_Pointset_Powerset_C_Polyhedron (pt);
+ free_poly_ddr (pddr);
+
return is_empty_p;
}
}
/* Returns TRUE when the dependence polyhedron between PDR1 and
- PDR2 represents a loop carried dependence at level LEVEL. Otherwise
- return FALSE. */
+ PDR2 represents a loop carried dependence at level LEVEL. */
static bool
graphite_carried_dependence_level_k (poly_dr_p pdr1, poly_dr_p pdr2,
graphite_dim_t ddim1 = pbb_dim_iter_domain (pbb1);
ppl_dimension_type dim;
bool empty_p;
+ poly_ddr_p pddr;
if ((PDR_TYPE (pdr1) == PDR_READ && PDR_TYPE (pdr2) == PDR_READ)
|| !poly_drs_may_alias_p (pdr1, pdr2))
if (sdim1 != sdim2)
return true;
- po = dependence_polyhedron (pbb1, pbb2, d1, d2, pdr1, pdr2, so1, so2,
- true, false);
- if (ppl_Pointset_Powerset_C_Polyhedron_is_empty (po))
+ pddr = dependence_polyhedron (pbb1, pbb2, d1, d2, pdr1, pdr2, so1, so2,
+ true, false);
+
+ if (pddr_is_empty (pddr))
{
ppl_delete_Pointset_Powerset_C_Polyhedron (po);
return false;
}
+ po = PDDR_DDP (pddr);
+
ppl_Pointset_Powerset_C_Polyhedron_space_dimension (po, &dim);
eqpp = build_pairwise_scheduling_inequality (dim, level, tdim1 + ddim1, 1);
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