diff --git a/gcc/range-op.cc b/gcc/range-op.cc
index 9a1a3c8bcdb..4ccb86ef0ba 100644
--- a/gcc/range-op.cc
+++ b/gcc/range-op.cc
@@ -435,8 +435,10 @@ update_known_bitmask (irange &r, tree_code code,
       bit_value_unop (code, sign, prec, &widest_value, &widest_mask,
 		      TYPE_SIGN (lh.type ()),
 		      TYPE_PRECISION (lh.type ()),
-		      widest_int::from (lh_bits.value (), sign),
-		      widest_int::from (lh_bits.mask (), sign));
+		      widest_int::from (lh_bits.value (),
+					TYPE_SIGN (lh.type ())),
+		      widest_int::from (lh_bits.mask (),
+					TYPE_SIGN (lh.type ())));
       break;
     case GIMPLE_BINARY_RHS:
       bit_value_binop (code, sign, prec, &widest_value, &widest_mask,
diff --git a/gcc/testsuite/gcc.dg/pr113756.c b/gcc/testsuite/gcc.dg/pr113756.c
new file mode 100644
index 00000000000..14442206f8a
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/pr113756.c
@@ -0,0 +1,36 @@
+/* PR tree-optimization/113756 */
+/* { dg-do run { target int32plus } } */
+/* { dg-options "-O2" } */
+
+int d, e, i, k, l = -8;
+signed char h, j;
+
+int
+bar (int n, int o, int p3)
+{
+  int a = o - p3, b = n - p3, c = a + b, f = -b, g = c < 0 ? -c : c;
+  return a <= f && a <= g ? o : p3;
+}
+
+void
+foo (int *n, unsigned short o)
+{
+  unsigned p = 8896;
+  for (; e >= 0; e--)
+    p = 5377;
+  for (; h <= 0; h++)
+    for (; j <= 0; j++)
+      {
+	*n = 1611581749;
+	i = bar (34, p - 5294, *n - 1611581687);
+	k = i + p + 65535 + o + *n - 1611718251;
+	if (k != 0)
+	  __builtin_abort ();
+      }
+}
+
+int
+main ()
+{
+  foo (&l, l);
+}