* @author Matthias Braun
* @version $Id$
*/
-#ifdef HAVE_CONFIG_H
#include "config.h"
-#endif
#include "bepeephole.h"
if(!mode_is_data(get_irn_mode(node)))
return;
- reg = arch_get_irn_register(arch_env, node);
+ reg = arch_get_irn_register(node);
if(reg == NULL) {
- panic("No register assigned at %+F\n", node);
+ panic("No register assigned at %+F", node);
}
if(arch_register_type_is(reg, virtual))
return;
if(!mode_is_data(get_irn_mode(node)))
return;
- reg = arch_get_irn_register(arch_env, node);
+ reg = arch_get_irn_register(node);
if(reg == NULL) {
- panic("No register assigned at %+F\n", node);
+ panic("No register assigned at %+F", node);
}
if(arch_register_type_is(reg, virtual))
return;
if (!mode_is_data(get_irn_mode(old_node)))
return;
- reg = arch_get_irn_register(arch_env, old_node);
+ reg = arch_get_irn_register(old_node);
if (reg == NULL) {
- panic("No register assigned at %+F\n", old_node);
+ panic("No register assigned at %+F", old_node);
}
- assert(reg == arch_get_irn_register(arch_env, new_node) &&
+ assert(reg == arch_get_irn_register(new_node) &&
"KILLING a node and replacing by different register is not allowed");
cls = arch_register_get_class(reg);
skip_barrier(start_blk, irg);
}
+/**
+ * Check whether the node has only one user. Explicitly ignore the anchor.
+ */
+static int has_only_one_user(ir_node *node)
+{
+ int n = get_irn_n_edges(node);
+ const ir_edge_t *edge;
+
+ if (n <= 1)
+ return 1;
+
+ if (n > 2)
+ return 0;
+
+ foreach_out_edge(node, edge) {
+ ir_node *src = get_edge_src_irn(edge);
+ if (is_Anchor(src))
+ return 1;
+ }
+
+ return 0;
+}
+
/*
- * Tries to optimize a beIncSp node with it's previous IncSP node.
+ * Tries to optimize a beIncSP node with its previous IncSP node.
* Must be run from a be_peephole_opt() context.
*/
ir_node *be_peephole_IncSP_IncSP(ir_node *node)
if (!be_is_IncSP(pred))
return node;
- if (get_irn_n_edges(pred) > 1)
+ if (!has_only_one_user(pred))
return node;
pred_offs = be_get_IncSP_offset(pred);
lv = be_get_birg_liveness(birg);
n_classes = arch_env_get_n_reg_class(arch_env);
- register_values = alloca(sizeof(register_values[0]) * n_classes);
+ register_values = ALLOCAN(ir_node**, n_classes);
for(i = 0; i < n_classes; ++i) {
const arch_register_class_t *cls = arch_env_get_reg_class(arch_env, i);
unsigned n_regs = arch_register_class_n_regs(cls);
- register_values[i] = alloca(sizeof(ir_node*) * n_regs);
+ register_values[i] = ALLOCAN(ir_node*, n_regs);
}
irg_block_walk_graph(irg, process_block, NULL, NULL);
FIRM_DBG_REGISTER(dbg, "firm.be.peephole");
}
-BE_REGISTER_MODULE_CONSTRUCTOR(be_init_spillbelady);
+BE_REGISTER_MODULE_CONSTRUCTOR(be_init_peephole);