+2012-04-25 Jakub Jelinek <jakub@redhat.com>
+
+ PR tree-optimization/53058
+ * double-int.h (double_int_max_value, double_int_min_value): New
+ prototypes.
+ * double-int.c (double_int_max_value, double_int_min_value): New
+ functions.
+ * tree-vrp.c (register_edge_assert_for_2): Compare mask
+ for LE_EXPR or GT_EXPR with double_int_max_value
+ instead of double_int_mask.
+
2012-04-25 Richard Guenther <rguenther@suse.de>
* tree-vectorizer.h (vect_loop_versioning): Adjust prototype.
/* Operations with long integers.
- Copyright (C) 2006, 2007, 2009, 2010 Free Software Foundation, Inc.
+ Copyright (C) 2006, 2007, 2009, 2010, 2012 Free Software Foundation, Inc.
This file is part of GCC.
return mask;
}
+/* Returns a maximum value for signed or unsigned integer
+ of precision PREC. */
+
+double_int
+double_int_max_value (unsigned int prec, bool uns)
+{
+ return double_int_mask (prec - (uns ? 0 : 1));
+}
+
+/* Returns a minimum value for signed or unsigned integer
+ of precision PREC. */
+
+double_int
+double_int_min_value (unsigned int prec, bool uns)
+{
+ if (uns)
+ return double_int_zero;
+ return double_int_lshift (double_int_one, prec - 1, prec, false);
+}
+
/* Clears the bits of CST over the precision PREC. If UNS is false, the bits
outside of the precision are set to the sign bit (i.e., the PREC-th one),
otherwise they are set to zero.
/* Operations with long integers.
- Copyright (C) 2006, 2007, 2008, 2010 Free Software Foundation, Inc.
+ Copyright (C) 2006, 2007, 2008, 2010, 2012 Free Software Foundation, Inc.
This file is part of GCC.
double_int double_int_zext (double_int, unsigned);
double_int double_int_mask (unsigned);
+double_int double_int_max_value (unsigned int, bool);
+double_int double_int_min_value (unsigned int, bool);
+
#define ALL_ONES (~((unsigned HOST_WIDE_INT) 0))
/* The operands of the following comparison functions must be processed
+2012-04-25 Jakub Jelinek <jakub@redhat.com>
+
+ PR tree-optimization/53058
+ * gcc.c-torture/compile/pr53058.c: New test.
+
2012-04-25 Jan Hubicka <jh@suse.cz>
PR middle-end/53088
--- /dev/null
+/* PR tree-optimization/53058 */
+
+int a, b, c;
+
+void
+foo ()
+{
+ c = b >> 16;
+ if (c > 32767)
+ c = 0;
+ a = b;
+}
&& INTEGRAL_TYPE_P (TREE_TYPE (name2))
&& IN_RANGE (tree_low_cst (cst2, 1), 1, prec - 1)
&& prec <= 2 * HOST_BITS_PER_WIDE_INT
+ && prec == GET_MODE_PRECISION (TYPE_MODE (TREE_TYPE (val)))
&& live_on_edge (e, name2)
&& !has_single_use (name2))
{
new_val = val2;
else
{
+ double_int maxval
+ = double_int_max_value (prec, TYPE_UNSIGNED (TREE_TYPE (val)));
mask = double_int_ior (tree_to_double_int (val2), mask);
- if (double_int_minus_one_p (double_int_sext (mask, prec)))
+ if (double_int_equal_p (mask, maxval))
new_val = NULL_TREE;
else
new_val = double_int_to_tree (TREE_TYPE (val2), mask);