|| (TREE_CODE (t) == VAR_DECL
&& DECL_HARD_REGISTER (t)));
ret->solution = BITMAP_ALLOC (&pta_obstack);
- ret->oldsolution = BITMAP_ALLOC (&oldpta_obstack);
+ ret->oldsolution = NULL;
ret->next = NULL;
stats.total_vars++;
}
BITMAP_FREE (get_varinfo (from)->solution);
- BITMAP_FREE (get_varinfo (from)->oldsolution);
+ if (get_varinfo (from)->oldsolution)
+ BITMAP_FREE (get_varinfo (from)->oldsolution);
- if (stats.iterations > 0)
- {
- BITMAP_FREE (get_varinfo (to)->oldsolution);
- get_varinfo (to)->oldsolution = BITMAP_ALLOC (&oldpta_obstack);
- }
+ if (stats.iterations > 0
+ && get_varinfo (to)->oldsolution)
+ BITMAP_FREE (get_varinfo (to)->oldsolution);
}
if (valid_graph_edge (graph, to, to))
{
constraint_t c;
bitmap solution;
VEC(constraint_t,heap) *complex = graph->complex[i];
+ varinfo_t vi = get_varinfo (i);
bool solution_empty;
/* Compute the changed set of solution bits. */
- bitmap_and_compl (pts, get_varinfo (i)->solution,
- get_varinfo (i)->oldsolution);
+ if (vi->oldsolution)
+ bitmap_and_compl (pts, vi->solution, vi->oldsolution);
+ else
+ bitmap_copy (pts, vi->solution);
if (bitmap_empty_p (pts))
continue;
- bitmap_ior_into (get_varinfo (i)->oldsolution, pts);
+ if (vi->oldsolution)
+ bitmap_ior_into (vi->oldsolution, pts);
+ else
+ {
+ vi->oldsolution = BITMAP_ALLOC (&oldpta_obstack);
+ bitmap_copy (vi->oldsolution, pts);
+ }
- solution = get_varinfo (i)->solution;
+ solution = vi->solution;
solution_empty = bitmap_empty_p (solution);
/* Process the complex constraints */
return;
}
+ /* For global variables resort to the alias target. */
+ if (TREE_CODE (t) == VAR_DECL
+ && (TREE_STATIC (t) || DECL_EXTERNAL (t)))
+ {
+ struct varpool_node *node = varpool_get_node (t);
+ if (node && node->alias)
+ {
+ node = varpool_variable_node (node, NULL);
+ t = node->decl;
+ }
+ }
+
vi = get_vi_for_tree (t);
cexpr.var = vi->id;
cexpr.type = SCALAR;
{
struct constraint_expr c;
unsigned int j, n;
- HOST_WIDE_INT rhsunitoffset, rhsoffset;
+ HOST_WIDE_INT rhsoffset;
/* If we do not do field-sensitive PTA adding offsets to pointers
does not change the points-to solution. */
solution which includes all sub-fields of all pointed-to
variables of ptr. */
if (offset == NULL_TREE
- || !host_integerp (offset, 0))
+ || TREE_CODE (offset) != INTEGER_CST)
rhsoffset = UNKNOWN_OFFSET;
else
{
- /* Make sure the bit-offset also fits. */
- rhsunitoffset = TREE_INT_CST_LOW (offset);
- rhsoffset = rhsunitoffset * BITS_PER_UNIT;
- if (rhsunitoffset != rhsoffset / BITS_PER_UNIT)
+ /* Sign-extend the offset. */
+ double_int soffset
+ = double_int_sext (tree_to_double_int (offset),
+ TYPE_PRECISION (TREE_TYPE (offset)));
+ if (!double_int_fits_in_shwi_p (soffset))
rhsoffset = UNKNOWN_OFFSET;
+ else
+ {
+ /* Make sure the bit-offset also fits. */
+ HOST_WIDE_INT rhsunitoffset = soffset.low;
+ rhsoffset = rhsunitoffset * BITS_PER_UNIT;
+ if (rhsunitoffset != rhsoffset / BITS_PER_UNIT)
+ rhsoffset = UNKNOWN_OFFSET;
+ }
}
get_constraint_for_rhs (ptr, results);
{
struct constraint_expr cs;
varinfo_t vi, curr;
- tree off = double_int_to_tree (sizetype, mem_ref_offset (t));
- get_constraint_for_ptr_offset (TREE_OPERAND (t, 0), off, results);
+ get_constraint_for_ptr_offset (TREE_OPERAND (t, 0),
+ TREE_OPERAND (t, 1), results);
do_deref (results);
/* If we are not taking the address then make sure to process
all subvariables we might access. */
+ if (address_p)
+ return;
+
cs = *VEC_last (ce_s, *results);
- if (address_p
- || cs.type != SCALAR)
+ if (cs.type == DEREF)
+ {
+ /* For dereferences this means we have to defer it
+ to solving time. */
+ VEC_last (ce_s, *results)->offset = UNKNOWN_OFFSET;
+ return;
+ }
+ if (cs.type != SCALAR)
return;
vi = get_varinfo (cs.var);
get_constraint_for (res, &lhsc);
if (DECL_FUNCTION_CODE (fndecl) == BUILT_IN_MEMPCPY
|| DECL_FUNCTION_CODE (fndecl) == BUILT_IN_STPCPY
- || DECL_FUNCTION_CODE (fndecl) == BUILT_IN_STPNCPY)
+ || DECL_FUNCTION_CODE (fndecl) == BUILT_IN_STPNCPY
+ || DECL_FUNCTION_CODE (fndecl) == BUILT_IN_MEMPCPY_CHK
+ || DECL_FUNCTION_CODE (fndecl) == BUILT_IN_STPCPY_CHK)
get_constraint_for_ptr_offset (dest, NULL_TREE, &rhsc);
else
get_constraint_for (dest, &rhsc);
VEC_free (ce_s, heap, lhsc);
return true;
}
+ case BUILT_IN_ASSUME_ALIGNED:
+ {
+ tree res = gimple_call_lhs (t);
+ tree dest = gimple_call_arg (t, 0);
+ if (res != NULL_TREE)
+ {
+ get_constraint_for (res, &lhsc);
+ get_constraint_for (dest, &rhsc);
+ process_all_all_constraints (lhsc, rhsc);
+ VEC_free (ce_s, heap, lhsc);
+ VEC_free (ce_s, heap, rhsc);
+ }
+ return true;
+ }
/* All the following functions do not return pointers, do not
modify the points-to sets of memory reachable from their
arguments and do not add to the ESCAPED solution. */
return;
}
/* The following functions neither read nor clobber memory. */
+ case BUILT_IN_ASSUME_ALIGNED:
case BUILT_IN_FREE:
return;
/* Trampolines are of no interest to us. */
insert_vi_for_tree (decl, vi);
+ if (TREE_CODE (decl) != VAR_DECL)
+ return id;
+
/* Create initial constraints for globals. */
for (; vi; vi = vi->next)
{
|| vi->only_restrict_pointers)
make_constraint_from_restrict (vi, "GLOBAL_RESTRICT");
- /* For escaped variables initialize them from nonlocal. */
+ /* In non-IPA mode the initializer from nonlocal is all we need. */
if (!in_ipa_mode
- || DECL_EXTERNAL (decl) || TREE_PUBLIC (decl))
+ || DECL_HARD_REGISTER (decl))
make_copy_constraint (vi, nonlocal_id);
- /* If this is a global variable with an initializer and we are in
- IPA mode generate constraints for it. In non-IPA mode
- the initializer from nonlocal is all we need. */
- if (in_ipa_mode
- && DECL_INITIAL (decl))
+ else
{
- VEC (ce_s, heap) *rhsc = NULL;
- struct constraint_expr lhs, *rhsp;
- unsigned i;
- get_constraint_for_rhs (DECL_INITIAL (decl), &rhsc);
- lhs.var = vi->id;
- lhs.offset = 0;
- lhs.type = SCALAR;
- FOR_EACH_VEC_ELT (ce_s, rhsc, i, rhsp)
- process_constraint (new_constraint (lhs, *rhsp));
- /* If this is a variable that escapes from the unit
- the initializer escapes as well. */
- if (DECL_EXTERNAL (decl) || TREE_PUBLIC (decl))
+ struct varpool_node *vnode = varpool_get_node (decl);
+
+ /* For escaped variables initialize them from nonlocal. */
+ if (!varpool_all_refs_explicit_p (vnode))
+ make_copy_constraint (vi, nonlocal_id);
+
+ /* If this is a global variable with an initializer and we are in
+ IPA mode generate constraints for it. */
+ if (DECL_INITIAL (decl))
{
- lhs.var = escaped_id;
+ VEC (ce_s, heap) *rhsc = NULL;
+ struct constraint_expr lhs, *rhsp;
+ unsigned i;
+ get_constraint_for_rhs (DECL_INITIAL (decl), &rhsc);
+ lhs.var = vi->id;
lhs.offset = 0;
lhs.type = SCALAR;
FOR_EACH_VEC_ELT (ce_s, rhsc, i, rhsp)
process_constraint (new_constraint (lhs, *rhsp));
+ /* If this is a variable that escapes from the unit
+ the initializer escapes as well. */
+ if (!varpool_all_refs_explicit_p (vnode))
+ {
+ lhs.var = escaped_id;
+ lhs.offset = 0;
+ lhs.type = SCALAR;
+ FOR_EACH_VEC_ELT (ce_s, rhsc, i, rhsp)
+ process_constraint (new_constraint (lhs, *rhsp));
+ }
+ VEC_free (ce_s, heap, rhsc);
}
- VEC_free (ce_s, heap, rhsc);
}
}
varinfo_t vi;
tree heapvar = build_fake_var_decl (TREE_TYPE (TREE_TYPE (t)));
DECL_EXTERNAL (heapvar) = 1;
- vi = get_varinfo (create_variable_info_for (heapvar, "PARM_NOALIAS"));
+ vi = create_variable_info_for_1 (heapvar, "PARM_NOALIAS");
+ insert_vi_for_tree (heapvar, vi);
lhsc.var = get_vi_for_tree (t)->id;
lhsc.type = SCALAR;
lhsc.offset = 0;
rhsc.offset = 0;
process_constraint (new_constraint (lhsc, rhsc));
vi->is_restrict_var = 1;
+ for (; vi; vi = vi->next)
+ if (vi->may_have_pointers)
+ {
+ if (vi->only_restrict_pointers)
+ make_constraint_from_restrict (vi, "GLOBAL_RESTRICT");
+ make_copy_constraint (vi, nonlocal_id);
+ }
continue;
}
return false;
}
-/* Associate node with varinfo DATA. Worker for
- varpool_for_node_and_aliases. */
-static bool
-associate_varinfo_to_alias_1 (struct varpool_node *node, void *data)
-{
- if (node->alias)
- insert_vi_for_tree (node->decl, (varinfo_t)data);
- return false;
-}
-
/* Execute the driver for IPA PTA. */
static unsigned int
ipa_pta_execute (void)
init_alias_vars ();
+ if (dump_file && (dump_flags & TDF_DETAILS))
+ {
+ dump_cgraph (dump_file);
+ fprintf (dump_file, "\n");
+ }
+
/* Build the constraints. */
for (node = cgraph_nodes; node; node = node->next)
{
/* Nodes without a body are not interesting. Especially do not
visit clones at this point for now - we get duplicate decls
there for inline clones at least. */
- if (!cgraph_function_with_gimple_body_p (node)
- || node->clone_of)
+ if (!cgraph_function_with_gimple_body_p (node))
continue;
+ gcc_assert (!node->clone_of);
+
vi = create_function_info_for (node->decl,
alias_get_name (node->decl));
cgraph_for_node_and_aliases (node, associate_varinfo_to_alias, vi, true);
/* Create constraints for global variables and their initializers. */
for (var = varpool_nodes; var; var = var->next)
{
- varinfo_t vi;
if (var->alias)
continue;
- vi = get_vi_for_tree (var->decl);
- varpool_for_node_and_aliases (var, associate_varinfo_to_alias_1, vi, true);
+ get_vi_for_tree (var->decl);
}
if (dump_file)
tree old_func_decl;
/* Nodes without a body are not interesting. */
- if (!cgraph_function_with_gimple_body_p (node)
- || node->clone_of)
+ if (!cgraph_function_with_gimple_body_p (node))
continue;
if (dump_file)
push_cfun (func);
current_function_decl = node->decl;
- if (node->local.externally_visible)
+ /* For externally visible or attribute used annotated functions use
+ local constraints for their arguments.
+ For local functions we see all callers and thus do not need initial
+ constraints for parameters. */
+ if (node->reachable_from_other_partition
+ || node->local.externally_visible
+ || node->needed)
{
- /* For externally visible functions use local constraints for
- their arguments. For local functions we see all callers
- and thus do not need initial constraints for parameters. */
intra_create_variable_infos ();
/* We also need to make function return values escape. Nothing
struct cgraph_edge *e;
/* Nodes without a body are not interesting. */
- if (!cgraph_function_with_gimple_body_p (node)
- || node->clone_of)
+ if (!cgraph_function_with_gimple_body_p (node))
continue;
fn = DECL_STRUCT_FUNCTION (node->decl);
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