X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=ir%2Fopt%2Fopt_osr.c;h=cdab2205802781dd15e7170d61f19e297a0abbb1;hb=8c9921a1fc166552f6e416434fd8394a4fc210a3;hp=569d9d060e8bc43ac87135fa81ac77cd987a65bb;hpb=10e58f9669ea6c77e82bd3bc12c4ac5bbaa6bb15;p=libfirm

diff --git a/ir/opt/opt_osr.c b/ir/opt/opt_osr.c
index 569d9d060..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"
@@ -1155,6 +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 {
@@ -1164,7 +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;
 		}