2007-04-12 Richard Guenther <rguenther@suse.de>
+ PR tree-optimization/31169
+ * gcc.c-torture/execute/pr31169.c: New testcase.
+
+2007-04-12 Richard Guenther <rguenther@suse.de>
+
PR tree-optimization/24689
PR tree-optimization/31307
* g++.dg/tree-ssa/pr31307.C: New testcase.
--- /dev/null
+extern void abort();
+
+#define HOST_WIDE_INT long
+#define HOST_BITS_PER_WIDE_INT (sizeof(long)*8)
+
+struct tree_type
+{
+ unsigned int precision : 9;
+};
+
+int
+sign_bit_p (struct tree_type *t, HOST_WIDE_INT val_hi, unsigned HOST_WIDE_INT val_lo)
+{
+ unsigned HOST_WIDE_INT mask_lo, lo;
+ HOST_WIDE_INT mask_hi, hi;
+ int width = t->precision;
+
+ if (width > HOST_BITS_PER_WIDE_INT)
+ {
+ hi = (unsigned HOST_WIDE_INT) 1 << (width - HOST_BITS_PER_WIDE_INT - 1);
+ lo = 0;
+
+ mask_hi = ((unsigned HOST_WIDE_INT) -1
+ >> (2 * HOST_BITS_PER_WIDE_INT - width));
+ mask_lo = -1;
+ }
+ else
+ {
+ hi = 0;
+ lo = (unsigned HOST_WIDE_INT) 1 << (width - 1);
+
+ mask_hi = 0;
+ mask_lo = ((unsigned HOST_WIDE_INT) -1
+ >> (HOST_BITS_PER_WIDE_INT - width));
+ }
+
+ if ((val_hi & mask_hi) == hi
+ && (val_lo & mask_lo) == lo)
+ return 1;
+
+ return 0;
+}
+
+int main()
+{
+ struct tree_type t;
+ t.precision = 1;
+ if (!sign_bit_p (&t, 0, -1))
+ abort ();
+ return 0;
+}