ppl_delete_Coefficient (coef);
}
-/* Saves in NV at index I a new name for variable P. */
-
-static void
-save_var_name (char **nv, int i, tree p)
-{
- const char *name = get_name (SSA_NAME_VAR (p));
-
- if (name)
- {
- int len = strlen (name) + 16;
- nv[i] = XNEWVEC (char, len);
- snprintf (nv[i], len, "%s_%d", name, SSA_NAME_VERSION (p));
- }
- else
- {
- nv[i] = XNEWVEC (char, 16);
- snprintf (nv[i], 2 + 16, "T_%d", SSA_NAME_VERSION (p));
- }
-}
-
/* When parameter NAME is in REGION, returns its index in SESE_PARAMS.
Otherwise returns -1. */
gcc_assert (SESE_ADD_PARAMS (region));
i = VEC_length (tree, SESE_PARAMS (region));
- save_var_name (SESE_PARAMS_NAMES (region), i, name);
- save_clast_name_index (SESE_PARAMS_INDEX (region),
- SESE_PARAMS_NAMES (region)[i], i);
VEC_safe_push (tree, heap, SESE_PARAMS (region), name);
return i;
}
static void
build_loop_iteration_domains (scop_p scop, struct loop *loop,
- ppl_Polyhedron_t outer_ph, int nb)
+ ppl_Polyhedron_t outer_ph, int nb,
+ ppl_Pointset_Powerset_C_Polyhedron_t *domains)
{
int i;
ppl_Polyhedron_t ph;
gcc_unreachable ();
if (loop->inner && loop_in_sese_p (loop->inner, region))
- build_loop_iteration_domains (scop, loop->inner, ph, nb + 1);
+ build_loop_iteration_domains (scop, loop->inner, ph, nb + 1, domains);
if (nb != 0
&& loop->next
&& loop_in_sese_p (loop->next, region))
- build_loop_iteration_domains (scop, loop->next, outer_ph, nb);
+ build_loop_iteration_domains (scop, loop->next, outer_ph, nb, domains);
ppl_new_Pointset_Powerset_C_Polyhedron_from_C_Polyhedron
- ((ppl_Pointset_Powerset_C_Polyhedron_t *) &loop->aux, ph);
+ (&domains[loop->num], ph);
ppl_delete_Polyhedron (ph);
}
int i;
ppl_Polyhedron_t ph;
poly_bb_p pbb;
+ int nb_loops = number_of_loops ();
+ ppl_Pointset_Powerset_C_Polyhedron_t *domains
+ = XNEWVEC (ppl_Pointset_Powerset_C_Polyhedron_t, nb_loops);
+
+ for (i = 0; i < nb_loops; i++)
+ domains[i] = NULL;
ppl_new_C_Polyhedron_from_space_dimension (&ph, scop_nb_params (scop), 0);
for (i = 0; VEC_iterate (loop_p, SESE_LOOP_NEST (region), i, loop); i++)
if (!loop_in_sese_p (loop_outer (loop), region))
- build_loop_iteration_domains (scop, loop, ph, 0);
+ build_loop_iteration_domains (scop, loop, ph, 0, domains);
for (i = 0; VEC_iterate (poly_bb_p, SCOP_BBS (scop), i, pbb); i++)
- if (gbb_loop (PBB_BLACK_BOX (pbb))->aux)
+ if (domains[gbb_loop (PBB_BLACK_BOX (pbb))->num])
ppl_new_Pointset_Powerset_C_Polyhedron_from_Pointset_Powerset_C_Polyhedron
(&PBB_DOMAIN (pbb), (ppl_const_Pointset_Powerset_C_Polyhedron_t)
- gbb_loop (PBB_BLACK_BOX (pbb))->aux);
+ domains[gbb_loop (PBB_BLACK_BOX (pbb))->num]);
else
ppl_new_Pointset_Powerset_C_Polyhedron_from_C_Polyhedron
(&PBB_DOMAIN (pbb), ph);
- for (i = 0; VEC_iterate (loop_p, SESE_LOOP_NEST (region), i, loop); i++)
- if (loop->aux)
- {
- ppl_delete_Pointset_Powerset_C_Polyhedron
- ((ppl_Pointset_Powerset_C_Polyhedron_t) loop->aux);
- loop->aux = NULL;
- }
+ for (i = 0; i < nb_loops; i++)
+ if (domains[i])
+ ppl_delete_Pointset_Powerset_C_Polyhedron (domains[i]);
ppl_delete_Polyhedron (ph);
+ free (domains);
}
/* Add a constrain to the ACCESSES polyhedron for the alias set of
gimple stmt = gimple_build_assign (res, zero_dim_array);
tree arg = gimple_phi_arg_def (phi, 0);
- insert_out_of_ssa_copy (zero_dim_array, arg);
+ if (TREE_CODE (arg) == SSA_NAME)
+ insert_out_of_ssa_copy (zero_dim_array, arg);
+ else
+ insert_out_of_ssa_copy_on_edge (single_pred_edge (gimple_bb (phi)),
+ zero_dim_array, arg);
remove_phi_node (psi, false);
gsi_insert_before (&gsi, stmt, GSI_NEW_STMT);
| end_2
| end_1
- whereas inserting the copy on the incomming edge is correct
+ whereas inserting the copy on the incoming edge is correct
| a = ...
| loop_1
split_block (bb, stmt);
+ if (gsi_one_before_end_p (gsi_start_bb (bb)))
+ return bb;
+
gsi = gsi_last_bb (bb);
gsi_prev (&gsi);
e = split_block (bb, gsi_stmt (gsi));
static inline bool
is_reduction_operation_p (gimple stmt)
{
+ enum tree_code code;
+
+ gcc_assert (is_gimple_assign (stmt));
+ code = gimple_assign_rhs_code (stmt);
+
return flag_associative_math
- && commutative_tree_code (gimple_assign_rhs_code (stmt))
- && associative_tree_code (gimple_assign_rhs_code (stmt));
+ && commutative_tree_code (code)
+ && associative_tree_code (code);
}
/* Returns true when PHI contains an argument ARG. */
stmt = SSA_NAME_DEF_STMT (arg);
+ if (gimple_code (stmt) == GIMPLE_NOP
+ || gimple_code (stmt) == GIMPLE_CALL)
+ return NULL;
+
if (gimple_code (stmt) == GIMPLE_PHI)
{
if (phi_contains_arg (stmt, lhs))
return NULL;
}
+ if (!is_gimple_assign (stmt))
+ return NULL;
+
if (gimple_num_ops (stmt) == 2)
return follow_ssa_with_commutative_ops (gimple_assign_rhs1 (stmt), lhs);
}
/* Detect commutative and associative scalar reductions starting at
- the STMT. */
+ the STMT. Return the phi node of the reduction cycle, or NULL. */
static gimple
detect_commutative_reduction_arg (tree lhs, gimple stmt, tree arg,
{
gimple phi = follow_ssa_with_commutative_ops (arg, lhs);
- if (phi)
- {
- VEC_safe_push (gimple, heap, *in, stmt);
- VEC_safe_push (gimple, heap, *out, stmt);
- return phi;
- }
+ if (!phi)
+ return NULL;
- return NULL;
+ VEC_safe_push (gimple, heap, *in, stmt);
+ VEC_safe_push (gimple, heap, *out, stmt);
+ return phi;
}
/* Detect commutative and associative scalar reductions starting at
- the STMT. */
+ the STMT. Return the phi node of the reduction cycle, or NULL. */
static gimple
detect_commutative_reduction_assign (gimple stmt, VEC (gimple, heap) **in,
}
/* Detect commutative and associative scalar reductions starting at
- the loop closed phi node CLOSE_PHI. */
+ the loop closed phi node CLOSE_PHI. Return the phi node of the
+ reduction cycle, or NULL. */
static gimple
detect_commutative_reduction (gimple stmt, VEC (gimple, heap) **in,
if (scalar_close_phi_node_p (stmt))
{
tree arg = gimple_phi_arg_def (stmt, 0);
- gimple def = SSA_NAME_DEF_STMT (arg);
- gimple loop_phi = detect_commutative_reduction (def, in, out);
+ gimple def, loop_phi;
+
+ if (TREE_CODE (arg) != SSA_NAME)
+ return NULL;
+
+ def = SSA_NAME_DEF_STMT (arg);
+ loop_phi = detect_commutative_reduction (def, in, out);
if (loop_phi)
{
translate_scalar_reduction_to_array_for_stmt (tree red, gimple stmt,
gimple loop_phi)
{
- basic_block bb = gimple_bb (stmt);
- gimple_stmt_iterator insert_gsi = gsi_after_labels (bb);
+ gimple_stmt_iterator insert_gsi = gsi_after_labels (gimple_bb (loop_phi));
tree res = gimple_phi_result (loop_phi);
gimple assign = gimple_build_assign (res, red);
gsi_insert_before (&insert_gsi, assign, GSI_SAME_STMT);
+ insert_gsi = gsi_after_labels (gimple_bb (stmt));
assign = gimple_build_assign (red, gimple_assign_lhs (stmt));
insert_gsi = gsi_for_stmt (stmt);
gsi_insert_after (&insert_gsi, assign, GSI_SAME_STMT);
#endif
}
+/* A LOOP is in normal form for Graphite when it contains only one
+ scalar phi node that defines the main induction variable of the
+ loop, only one increment of the IV, and only one exit condition. */
+
+static void
+graphite_loop_normal_form (loop_p loop)
+{
+ struct tree_niter_desc niter;
+ tree nit;
+ gimple_seq stmts;
+ edge exit = single_dom_exit (loop);
+
+ bool known_niter = number_of_iterations_exit (loop, exit, &niter, false);
+
+ /* At this point we should know the number of iterations, */
+ gcc_assert (known_niter);
+
+ nit = force_gimple_operand (unshare_expr (niter.niter), &stmts, true,
+ NULL_TREE);
+ if (stmts)
+ gsi_insert_seq_on_edge_immediate (loop_preheader_edge (loop), stmts);
+
+ loop->single_iv = canonicalize_loop_ivs (loop, &nit);
+}
+
+/* Rewrite all the loops of SCOP in normal form: one induction
+ variable per loop. */
+
+static void
+scop_canonicalize_loops (scop_p scop)
+{
+ loop_iterator li;
+ loop_p loop;
+
+ FOR_EACH_LOOP (li, loop, 0)
+ if (loop_in_sese_p (loop, SCOP_REGION (scop)))
+ graphite_loop_normal_form (loop);
+}
+
/* Builds the polyhedral representation for a SESE region. */
bool
if (nb_pbbs_in_loops (scop) == 0)
return false;
+ scop_canonicalize_loops (scop);
build_sese_loop_nests (region);
build_sese_conditions (region);
find_scop_parameters (scop);
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