/**
- * @author Daniel Grund
- * @date 09.08.2005
+ * @author Daniel Grund, Christian Wuerdig
+ * @cvsid $Id$
+ * @date 09.08.2005
*/
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
-#include <stdlib.h>
+#ifdef HAVE_STDLIB_H
+# include <stdlib.h>
+#endif
+#include "irnode.h"
#include "debug.h"
#include "irgwalk.h"
#include "irop_t.h"
#include "iredges_t.h"
-#include "phiclass_t.h"
+#include "phiclass.h"
+#include "irphase_t.h"
+
+struct _phi_classes_t {
+ phase_t ph; /* The phase object holding the irn data */
+ pset *all_phi_classes; /* A set containing all Phi classes */
+ ir_graph *irg; /* The irg this is all about */
+ unsigned pure_phi_classes; /* Build pure Phi classes */
+ DEBUG_ONLY(firm_dbg_module_t *dbg);
+};
+
+typedef struct _irn_phi_class_t {
+ ir_node ***phi_cls; /* the array of node pointers representing the class */
+} irn_phi_class_t;
+
+static INLINE ir_node ***_get_phi_class(phase_t *ph, ir_node *irn) {
+ irn_phi_class_t *ipc = phase_get_or_set_irn_data(ph, irn);
+ return ipc->phi_cls;
+}
+
+static INLINE void _set_phi_class(phase_t *ph, ir_node *irn, ir_node ***cls) {
+ irn_phi_class_t *ipc = phase_get_or_set_irn_data(ph, irn);
+ ipc->phi_cls = cls;
+}
-#define DEBUG_LVL SET_LEVEL_0
-static firm_dbg_module_t *dbg = NULL;
+/* initialize data structure for given irn in given phase */
+static void *irn_phi_class_init(phase_t *ph, ir_node *irn, void *data) {
+ irn_phi_class_t *ipc = data ? data : phase_alloc(ph, sizeof(ipc[0]));
+ memset(ipc, 0, sizeof(ipc[0]));
+ return ipc;
+}
-size_t phi_irn_data_offset = 0;
+/**
+ * Builds the phi class, starting from.
+ * @param phi_classes The phi class object
+ * @param irn The to start from
+ * @param pc The phi class this irn should be put into.
+ * Set to NULL if you want a new one.
+ */
+static void phi_class_build(phi_classes_t *phi_classes, ir_node *irn, ir_node ***pc) {
+ const ir_edge_t *edge;
-static void phi_class_build(ir_node *irn, pset *pc) {
- int i, max;
+ assert((! phi_classes->pure_phi_classes || is_Phi(irn)) && "Node must be Phi when pure_phi_classes set.");
/* If irn has a phi class assigned already
* return immediately to stop recursion */
- if (_get_phi_class(irn)) {
- DBG((dbg, LEVEL_2, " already done for %+F\n", irn));
+ if (_get_phi_class(&phi_classes->ph, irn)) {
+ DBG((phi_classes->dbg, LEVEL_2, "\talready done for %+F\n", irn));
return;
}
/* The initial call to phi_class_build doesn't
- * provide a pset, so alloc it */
- if (!pc) {
- DBG((dbg, LEVEL_1, "Computing phi class for %+F\n", irn));
+ * provide a nodeset, so alloc it */
+ if (! pc) {
+ DBG((phi_classes->dbg, LEVEL_1, "Computing phi class for %+F:\n", irn));
assert(is_Phi(irn));
- pc = pset_new_ptr(4);
+ pc = phase_alloc(&phi_classes->ph, sizeof(*pc));
+ *pc = NEW_ARR_F(ir_node *, 0);
+ DBG((phi_classes->dbg, LEVEL_2, "\tcreated class %p in container %p\n", *pc, pc));
}
/* Add the irn to the phi class */
- DBG((dbg, LEVEL_1, " adding %+F\n", irn));
- pset_insert_ptr(pc, irn);
- _set_phi_class(irn, pc);
+ DBG((phi_classes->dbg, LEVEL_1, "\t\tadding %+F to class %p, container %p\n", irn, *pc, pc));
+ ARR_APP1(ir_node *, *pc, irn);
+ _set_phi_class(&phi_classes->ph, irn, pc);
/* Check the 'neighbour' irns */
if (is_Phi(irn) && mode_is_datab(get_irn_mode(irn))) {
+ int i;
+ DBG((phi_classes->dbg, LEVEL_2, "\tchecking args of %+F:\n", irn));
/* Add all args of the phi to the phi-class. */
- for (i=0, max=get_irn_arity(irn); i<max; ++i) {
- DBG((dbg, LEVEL_2, " checking arg %+F\n", get_irn_n(irn, i)));
- phi_class_build(get_irn_n(irn, i), pc);
- }
+ for (i = get_irn_arity(irn) - 1; i >= 0; --i) {
+ ir_node *op = get_irn_n(irn, i);
+ DBG((phi_classes->dbg, LEVEL_2, "\tchecking arg %+F\n", op));
+ if (! phi_classes->pure_phi_classes || is_Phi(op))
+ phi_class_build(phi_classes, op, pc);
+ }
}
/* Add a user of the irn to the class,
* iff it is a phi node */
- const ir_edge_t *edge;
- foreach_out_edge(irn, edge) {
- ir_node *user = edge->src;
- DBG((dbg, LEVEL_2, " checking user %+F\n", user));
- if (is_Phi(user) && mode_is_datab(get_irn_mode(user)))
- phi_class_build(user, pc);
+ if (! phi_classes->pure_phi_classes || 1) {
+ DBG((phi_classes->dbg, LEVEL_2, "\tchecking users of %+F:\n", irn));
+ foreach_out_edge(irn, edge) {
+ ir_node *user = edge->src;
+ DBG((phi_classes->dbg, LEVEL_2, "\tchecking user %+F ... ", user));
+ if (is_Phi(user) && mode_is_datab(get_irn_mode(user))) {
+ DB((phi_classes->dbg, LEVEL_2, "is a Phi, descend\n"));
+ phi_class_build(phi_classes, user, pc);
+ }
+ else {
+ DB((phi_classes->dbg, LEVEL_2, "not a Phi, skip\n"));
+ }
+ }
}
}
-pset *phi_class_compute_by_phis(pset *all_phi_nodes) {
- int i;
- ir_node *phi;
- pset *all_phi_classes = pset_new_ptr_default();
+/**
+ * Call by a walker. If @p node is Phi, it build the Phi class starting from this node.
+ */
+static void phi_class_construction_walker(ir_node *node, void *env) {
+ phi_classes_t *pc = env;
+
+ if (is_Phi(node) && mode_is_datab(get_irn_mode(node))) {
+ ir_node ***irn_pc = _get_phi_class(&pc->ph, node);
- for (i = 0, phi=pset_first(all_phi_nodes); phi; phi=pset_next(all_phi_nodes)) {
- assert(is_Phi(phi) && mode_is_datab(get_irn_mode(phi)));
- phi_class_build(phi, NULL);
- pset_insert_ptr(all_phi_classes, _get_phi_class(phi));
- }
+ if (! irn_pc) {
+ ir_node **pc_values;
+ phi_class_build(pc, node, NULL);
- return all_phi_classes;
+ pc_values = *_get_phi_class(&pc->ph, node);
+ DBG((pc->dbg, LEVEL_1, "inserting phiclass %p (%d members) into all classes\n", pc_values, ARR_LEN(pc_values)));
+
+ pset_insert_ptr(pc->all_phi_classes, pc_values);
+ }
+ }
}
-static void phi_class_construction_walker(ir_node *node, void *env) {
- if (is_Phi(node) && mode_is_datab(get_irn_mode(node)))
- phi_class_build(node, NULL);
+/**
+ * Walk over the irg and build the Phi classes.
+ */
+static void phi_class_compute(phi_classes_t *pc) {
+ irg_walk_graph(pc->irg, phi_class_construction_walker, NULL, pc);
}
-static void phi_class_destruction_walker(ir_node *node, void *env) {
- pset *clss = _get_phi_class(node);
- if (clss) {
- del_pset(clss);
- _set_phi_class(node, NULL);
+/**
+ * Build the Phi classes for the set of given Phis.
+ */
+static void phi_class_compute_by_phis(phi_classes_t *pc, pset *all_phi_nodes) {
+ if (pset_count(all_phi_nodes)) {
+ ir_node *phi;
+
+ foreach_pset(all_phi_nodes, phi) {
+ ir_node ***irn_pc = _get_phi_class(&pc->ph, phi);
+
+ assert(is_Phi(phi) && mode_is_datab(get_irn_mode(phi)));
+
+ if (! irn_pc) {
+ ir_node **pc_values;
+
+ phi_class_build(pc, phi, NULL);
+
+ pc_values = *_get_phi_class(&pc->ph, phi);
+ DBG((pc->dbg, LEVEL_1, "inserting phiclass %p into all classes\n", pc_values));
+
+ pset_insert_ptr(pc->all_phi_classes, pc_values);
+ }
+ }
}
}
-void phi_class_compute(ir_graph *irg) {
- irg_walk_graph(irg, phi_class_destruction_walker, NULL, NULL);
- irg_walk_graph(irg, phi_class_construction_walker, NULL, NULL);
+/**
+ * Return the array containing all nodes assigned to the same Phi class as @p irn.
+ */
+ir_node **get_phi_class(phi_classes_t *pc, ir_node *irn) {
+ return *_get_phi_class(&pc->ph, irn);
}
-void phi_class_free(ir_graph *irg) {
- irg_walk_graph(irg, phi_class_destruction_walker, NULL, NULL);
+/**
+ * Assigns a new array of nodes representing the new Phi class to @p irn.
+ */
+void set_phi_class(phi_classes_t *pc, ir_node *irn, ir_node **cls) {
+ _set_phi_class(&pc->ph, irn, &cls);
}
-pset *get_phi_class(const ir_node *irn) {
- return get_irn_phi_info(irn)->phi_class;
+/**
+ * Returns a set containing all computed Phi classes.
+ */
+pset *get_all_phi_classes(phi_classes_t *pc) {
+ return pc->all_phi_classes;
}
-void phi_class_init(void) {
- dbg = firm_dbg_register("ir.ana.phiclass");
- firm_dbg_set_mask(dbg, DEBUG_LVL);
- phi_irn_data_offset = register_additional_node_data(sizeof(phi_info_t));
+/**
+ * Builds the Phi classes for all Phis in @p irg.
+ * @return The Phi class object for the @p irg.
+ */
+phi_classes_t *phi_class_new_from_irg(ir_graph *irg, int pure_phi_classes) {
+ phi_classes_t *res = xmalloc(sizeof(*res));
+
+ FIRM_DBG_REGISTER(res->dbg, "ir.ana.phiclass");
+ phase_init(&res->ph, "phi_classes", irg, PHASE_DEFAULT_GROWTH, irn_phi_class_init);
+
+ res->irg = irg;
+ res->all_phi_classes = pset_new_ptr(5);
+ res->pure_phi_classes = pure_phi_classes;
+
+ phi_class_compute(res);
+
+ return res;
+}
+
+/**
+ * Builds all Phi classes for the given set of Phis.
+ * @return The Phis class object for @p all_phis.
+ */
+phi_classes_t *phi_class_new_from_set(ir_graph *irg, pset *all_phis, int pure_phi_classes) {
+ phi_classes_t *res = xmalloc(sizeof(*res));
+
+ FIRM_DBG_REGISTER(res->dbg, "ir.ana.phiclass");
+ phase_init(&res->ph, "phi_classes", irg, PHASE_DEFAULT_GROWTH, irn_phi_class_init);
+
+ res->irg = irg;
+ res->all_phi_classes = pset_new_ptr(5);
+ res->pure_phi_classes = pure_phi_classes;
+
+ phi_class_compute_by_phis(res, all_phis);
+
+ return res;
+}
+
+/**
+ * Free all allocated data.
+ */
+void phi_class_free(phi_classes_t *pc) {
+ ir_node **ipc;
+ foreach_pset(pc->all_phi_classes, ipc) {
+ DEL_ARR_F(ipc);
+ }
+ del_pset(pc->all_phi_classes);
+ phase_free(&pc->ph);
+ xfree(pc);
}
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