fixed lowering of Conv from I->L (fixed fehler72.c)

[r15615]

diff --git a/ir/lower/lower_dw.c b/ir/lower/lower_dw.c
index 991fa36..10b1941 100644 (file)
--- a/ir/lower/lower_dw.c
+++ b/ir/lower/lower_dw.c
@@ -1459,8 +1459,13 @@ static void lower_Conv_to_Ls(ir_node *node, lower_env_t *env) {
                                op = new_rd_Conv(dbg, irg, block, op, dst_mode);
 
                        env->entries[idx]->low_word  = op;
-                       env->entries[idx]->high_word = new_rd_Shrs(dbg, irg, block, op,
-                               new_Const_long(mode_Iu, get_mode_size_bits(dst_mode) - 1), dst_mode);
+
+                       if (mode_is_signed(imode)) {
+                               env->entries[idx]->high_word = new_rd_Shrs(dbg, irg, block, op,
+                                       new_Const_long(mode_Iu, get_mode_size_bits(dst_mode) - 1), dst_mode);
+                       } else {
+                               env->entries[idx]->high_word = new_Const(dst_mode, get_mode_null(dst_mode));
+                       }  /* if */
                }  /* if */
        } else {
                ir_node *irn, *call;
@@ -1509,7 +1514,13 @@ static void lower_Conv_to_Lu(ir_node *node, lower_env_t *env) {
                                op = new_rd_Conv(dbg, irg, block, op, dst_mode);
 
                        env->entries[idx]->low_word  = op;
-                       env->entries[idx]->high_word = new_Const(dst_mode, get_mode_null(dst_mode));
+
+                       if (mode_is_signed(imode)) {
+                               env->entries[idx]->high_word = new_rd_Shrs(dbg, irg, block, op,
+                                       new_Const_long(mode_Iu, get_mode_size_bits(dst_mode) - 1), dst_mode);
+                       } else {
+                               env->entries[idx]->high_word = new_Const(dst_mode, get_mode_null(dst_mode));
+                       }  /* if */
                }  /* if */
        } else {
                ir_node *irn, *call;