+2012-01-03 Richard Guenther <rguenther@suse.de>
+
+ PR middle-end/51730
+ * fold-const.c (fold_comparison): Properly canonicalize
+ tree offset and HOST_WIDE_INT bit position.
+
2012-01-02 Uros Bizjak <ubizjak@gmail.com>
* config/ia64/ia64.c (expand_vec_perm_broadcast): Use correct
indirect_base0 = true;
}
offset0 = TREE_OPERAND (arg0, 1);
+ if (host_integerp (offset0, 0)
+ && ((HOST_WIDE_INT) (TREE_INT_CST_LOW (offset0) * BITS_PER_UNIT)
+ / BITS_PER_UNIT
+ == (HOST_WIDE_INT) TREE_INT_CST_LOW (offset0)))
+ {
+ bitpos0 = TREE_INT_CST_LOW (offset0) * BITS_PER_UNIT;
+ offset0 = NULL_TREE;
+ }
}
base1 = arg1;
indirect_base1 = true;
}
offset1 = TREE_OPERAND (arg1, 1);
+ if (host_integerp (offset1, 0)
+ && ((HOST_WIDE_INT) (TREE_INT_CST_LOW (offset1) * BITS_PER_UNIT)
+ / BITS_PER_UNIT
+ == (HOST_WIDE_INT) TREE_INT_CST_LOW (offset1)))
+ {
+ bitpos1 = TREE_INT_CST_LOW (offset1) * BITS_PER_UNIT;
+ offset1 = NULL_TREE;
+ }
}
/* A local variable can never be pointed to by
--- /dev/null
+/* { dg-do compile } */
+/* { dg-options "-fdump-tree-original" } */
+
+char digs[] = "0123456789";
+int foo (void)
+{
+ int xlcbug = 1 / (&(digs + 5)[-2 + (_Bool) 1] == &digs[4] ? 1 : -1);
+ return xlcbug;
+}
+
+/* { dg-final { scan-tree-dump "xlcbug = 1;" "original" } } */
+/* { dg-final { cleanup-tree-dump "original" } } */