1 files changed, 5 insertions, 19 deletions

diff --git a/gcc/tree.c b/gcc/tree.c
index 5da8206..83f1237 100644
--- a/gcc/tree.c
+++ b/gcc/tree.c
@@ -1221,32 +1221,18 @@ build_int_cst_wide (tree type, unsigned HOST_WIDE_INT low, HOST_WIDE_INT hi)
 tree
 build_low_bits_mask (tree type, unsigned bits)
 {
-  unsigned HOST_WIDE_INT low;
-  HOST_WIDE_INT high;
-  unsigned HOST_WIDE_INT all_ones = ~(unsigned HOST_WIDE_INT) 0;
+  double_int mask;
 
   gcc_assert (bits <= TYPE_PRECISION (type));
 
   if (bits == TYPE_PRECISION (type)
       && !TYPE_UNSIGNED (type))
-    {
-      /* Sign extended all-ones mask.  */
-      low = all_ones;
-      high = -1;
-    }
-  else if (bits <= HOST_BITS_PER_WIDE_INT)
-    {
-      low = all_ones >> (HOST_BITS_PER_WIDE_INT - bits);
-      high = 0;
-    }
+    /* Sign extended all-ones mask.  */
+    mask = double_int_minus_one;
   else
-    {
-      bits -= HOST_BITS_PER_WIDE_INT;
-      low = all_ones;
-      high = all_ones >> (HOST_BITS_PER_WIDE_INT - bits);
-    }
+    mask = double_int_mask (bits);
 
-  return build_int_cst_wide (type, low, high);
+  return build_int_cst_wide (type, mask.low, mask.high);
 }
 
 /* Checks that X is integer constant that can be expressed in (unsigned)