X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=ir%2Fbe%2Fbepeephole.c;h=c2d4d1615e8242c47976e8bfe1462b8d6b73786a;hb=d081119723f6f0fdff8c0a6ca93492c1a7ed6a6f;hp=c9bb6e3069e770c0ae4c5cbe49e56ef148ad9c59;hpb=0fbcef83aa6060534172bb13e71cdadb04428806;p=libfirm

diff --git a/ir/be/bepeephole.c b/ir/be/bepeephole.c
index c9bb6e306..c2d4d1615 100644
--- a/ir/be/bepeephole.c
+++ b/ir/be/bepeephole.c
@@ -34,11 +34,11 @@
 #include "irgmod.h"
 #include "error.h"
 
-#include "beirg_t.h"
+#include "beirg.h"
 #include "belive_t.h"
-#include "bearch_t.h"
-#include "benode_t.h"
-#include "besched_t.h"
+#include "bearch.h"
+#include "benode.h"
+#include "besched.h"
 #include "bemodule.h"
 
 DEBUG_ONLY(static firm_dbg_module_t *dbg = NULL;)
@@ -265,8 +265,14 @@ static void skip_barrier(ir_node *ret_blk, ir_graph *irg) {
 
 		foreach_out_edge_safe(irn, edge, next) {
 			ir_node *proj = get_edge_src_irn(edge);
-			int      pn   = (int)get_Proj_proj(proj);
-			ir_node *pred = get_irn_n(irn, pn);
+			int      pn;
+			ir_node *pred;
+
+			if (is_Anchor(proj))
+				continue;
+
+			pn   = (int) get_Proj_proj(proj);
+			pred = get_irn_n(irn, pn);
 
 			edges_reroute_kind(proj, pred, EDGE_KIND_NORMAL, irg);
 			edges_reroute_kind(proj, pred, EDGE_KIND_DEP, irg);
@@ -298,8 +304,31 @@ static void	kill_barriers(ir_graph *irg) {
 	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)
@@ -312,7 +341,7 @@ 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);
@@ -361,11 +390,11 @@ void be_peephole_opt(be_irg_t *birg)
 	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);