re PR tree-optimization/43528 (ICE: in tree_low_cst, at tree.c:6198 with…

re PR tree-optimization/43528 (ICE: in tree_low_cst, at tree.c:6198 with -mms-bitfields at x86_64-linux)

	PR tree-optimization/43528
	* stor-layout.c (place_field): Check that constant fits into
	unsigned HWI when skipping calculation of MS bitfield layout.

testsuite/ChangeLog:

	PR tree-optimization/43528
	* gcc.target/i386/pr43528.c: New test.

From-SVN: r157776

gcc/ChangeLog

+2010-03-27  Uros Bizjak  <ubizjak@gmail.com>
+
+	PR tree-optimization/43528
+	* stor-layout.c (place_field): Check that constant fits into
+	unsigned HWI when skipping calculation of MS bitfield layout.
+
 2010-03-27  Jan Hubicka  <jh@suse.cz>
 
 	PR middle-end/43391

gcc/stor-layout.c

@@ -1346,11 +1346,12 @@ place_field (record_layout_info rli, tree field)
 	     until we see a bitfield (and come by here again) we just skip
 	     calculating it.  */
 	  if (DECL_SIZE (field) != NULL
-	      && host_integerp (TYPE_SIZE (TREE_TYPE (field)), 0)
-	      && host_integerp (DECL_SIZE (field), 0))
+	      && host_integerp (TYPE_SIZE (TREE_TYPE (field)), 1)
+	      && host_integerp (DECL_SIZE (field), 1))
 	    {
-	      HOST_WIDE_INT bitsize = tree_low_cst (DECL_SIZE (field), 1);
-	      HOST_WIDE_INT typesize
+	      unsigned HOST_WIDE_INT bitsize
+		= tree_low_cst (DECL_SIZE (field), 1);
+	      unsigned HOST_WIDE_INT typesize
 		= tree_low_cst (TYPE_SIZE (TREE_TYPE (field)), 1);
 
 	      if (typesize < bitsize)

gcc/testsuite/ChangeLog

+2010-03-27  Uros Bizjak  <ubizjak@gmail.com>
+
+	PR tree-optimization/43528
+	* gcc.target/i386/pr43528.c: New test.
+
 2010-03-26  Joseph Myers  <joseph@codesourcery.com>
 
 	PR c/43381

gcc/testsuite/gcc.target/i386/pr43528.c

+/* { dg-do compile } */
+/* { dg-require-effective-target lp64 } */
+/* { dg-options "-mms-bitfields" } */
+
+struct S { int i[(1LL << 60) - 1]; };