re PR middle-end/65680 (ICE at -O1 and above on x86_64-linux-gnu in…

re PR middle-end/65680 (ICE at -O1 and above on x86_64-linux-gnu in expand_assignment, at expr.c:4830)

	PR middle-end/65680
	* expr.c (get_inner_reference): Handle bit_offset that doesn't fit
	into signed HOST_WIDE_INT the same as negative bit_offset.

	* gcc.c-torture/compile/pr65680.c: New test.

From-SVN: r221899

gcc/ChangeLog

+2015-04-07  Jakub Jelinek  <jakub@redhat.com>
+
+	PR middle-end/65680
+	* expr.c (get_inner_reference): Handle bit_offset that doesn't fit
+	into signed HOST_WIDE_INT the same as negative bit_offset.
+
 2015-04-07  Ilya Enkovich  <ilya.enkovich@intel.com>
 
 	* ipa-comdats.c (ipa_comdats): Visit all thunks

gcc/expr.c

@@ -6941,7 +6941,7 @@ get_inner_reference (tree exp, HOST_WIDE_INT *pbitsize,
   if (offset)
     {
       /* Avoid returning a negative bitpos as this may wreak havoc later.  */
-      if (wi::neg_p (bit_offset))
+      if (wi::neg_p (bit_offset) || !wi::fits_shwi_p (bit_offset))
         {
 	  offset_int mask = wi::mask <offset_int> (LOG2_BITS_PER_UNIT, false);
 	  offset_int tem = bit_offset.and_not (mask);

gcc/testsuite/ChangeLog

+2015-04-07  Jakub Jelinek  <jakub@redhat.com>
+
+	PR middle-end/65680
+	* gcc.c-torture/compile/pr65680.c: New test.
+
 2015-04-07  Andre Vehreschild  <vehre@gmx.de>
 
 	PR fortran/65548

gcc/testsuite/gcc.c-torture/compile/pr65680.c

+/* PR middle-end/65680 */
+/* { dg-do compile { target lp64 } } */
+
+struct S
+{
+  int f : 1;
+} a[100000000000000001][3];
+
+void
+foo (void)
+{
+  struct S b = { 0 };
+  a[100000000000000000][0] = b;
+}
+
+void
+bar (void)
+{
+  a[100000000000000000][0].f = 1;
+}