X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=ir%2Fopt%2Fopt_osr.c;h=cdab2205802781dd15e7170d61f19e297a0abbb1;hb=8c9921a1fc166552f6e416434fd8394a4fc210a3;hp=1916430d9fe4cec0286221011388b2de9ec31603;hpb=8e4bc2eb57a9cdde6fab823850e61ed9e85da775;p=libfirm

diff --git a/ir/opt/opt_osr.c b/ir/opt/opt_osr.c
index 1916430d9..cdab22058 100644
--- a/ir/opt/opt_osr.c
+++ b/ir/opt/opt_osr.c
@@ -22,7 +22,6 @@
  * @brief   Operator Strength Reduction.
  * @date    12.5.2006
  * @author  Michael Beck
- * @version $Id$
  * @brief
  *  Implementation of the Operator Strength Reduction algorithm
  *  by Keith D. Cooper, L. Taylor Simpson, Christopher A. Vick.
@@ -46,6 +45,7 @@
 #include "set.h"
 #include "tv.h"
 #include "hashptr.h"
+#include "util.h"
 #include "irtools.h"
 #include "irloop_t.h"
 #include "array.h"
@@ -608,13 +608,12 @@ static int is_counter_iv(ir_node *iv, iv_env *env)
  */
 static int check_users_for_reg_pressure(ir_node *iv, iv_env *env)
 {
-	ir_node    *irn, *header;
+	ir_node    *irn;
 	ir_node    *have_user = NULL;
 	ir_node    *have_cmp  = NULL;
 	node_entry *e         = get_irn_ne(iv, env);
 	scc        *pscc      = e->pscc;
 
-	header = e->header;
 	for (irn = pscc->head; irn != NULL; irn = e->next) {
 		const ir_edge_t *edge;
 
@@ -1156,6 +1155,12 @@ static ir_node *applyOneEdge(ir_node *iv, ir_node *rc, LFTR_edge *e, iv_env *env
 			panic("Unsupported opcode");
 		}
 
+		if (tv == tarval_bad || tv_init == tarval_bad) {
+			tarval_set_integer_overflow_mode(ovmode);
+			DB((dbg, LEVEL_4, " = OVERFLOW"));
+			return NULL;
+		}
+
 		if (pscc->code == iro_Add) {
 			tv_end = tarval_add(tv, tv_incr);
 		} else {
@@ -1165,7 +1170,7 @@ static ir_node *applyOneEdge(ir_node *iv, ir_node *rc, LFTR_edge *e, iv_env *env
 
 		tarval_set_integer_overflow_mode(ovmode);
 
-		if (tv == tarval_bad || tv_init == tarval_bad || tv_end == tarval_bad) {
+		if (tv_end == tarval_bad) {
 			DB((dbg, LEVEL_4, " = OVERFLOW"));
 			return NULL;
 		}