[PATCH 1/3] extract has_users() from dead_insn()

[Luc Van Oostenryck <luc.vanoostenryck@gmail.com>]

so that it can be reused for others uses.

Signed-off-by: Luc Van Oostenryck <luc.vanoostenryck@gmail.com>
---
 simplify.c | 17 ++++++++++++-----
 1 file changed, 12 insertions(+), 5 deletions(-)

diff --git a/simplify.c b/simplify.c
index a141ddd43..65114193a 100644
--- a/simplify.c
+++ b/simplify.c
@@ -301,16 +301,23 @@ void kill_insn(struct instruction *insn, int force)
 	return;
 }
 
+static int has_users(pseudo_t p)
+{
+	struct pseudo_user *pu;
+	FOR_EACH_PTR(p->users, pu) {
+		if (*pu->userp != VOID)
+			return 1;
+	} END_FOR_EACH_PTR(pu);
+	return 0;
+}
+
 /*
  * Kill trivially dead instructions
  */
 static int dead_insn(struct instruction *insn, pseudo_t *src1, pseudo_t *src2, pseudo_t *src3)
 {
-	struct pseudo_user *pu;
-	FOR_EACH_PTR(insn->target->users, pu) {
-		if (*pu->userp != VOID)
-			return 0;
-	} END_FOR_EACH_PTR(pu);
+	if (has_users(insn->target))
+		return 0;
 
 	insn->bb = NULL;
 	kill_use(src1);
-- 
2.13.0