re PR c++/25263 (ICE on invalid array bound: int x[1/0];)

	PR c++/25263
	* decl.c (compute_array_index_type): Check that itype is an
	INTEGER_CST node before testing/clearing TREE_OVERFLOW.

	* g++.dg/other/array2.C: New test case.

From-SVN: r108119

gcc/cp/ChangeLog

+2005-12-06  Roger Sayle  <roger@eyesopen.com>
+
+	PR c++/25263
+	* decl.c (compute_array_index_type): Check that itype is an
+	INTEGER_CST node before testing/clearing TREE_OVERFLOW.
+
 2005-12-05  Daniel Berlin  <dberlin@dberlin.org>
 
 	* ptree.c (cxx_print_decl): Update to check for decl_common

gcc/cp/decl.c

@@ -6374,7 +6374,8 @@ compute_array_index_type (tree name, tree size)
       /* Make sure that there was no overflow when creating to a signed
 	 index type.  (For example, on a 32-bit machine, an array with
 	 size 2^32 - 1 is too big.)  */
-      else if (TREE_OVERFLOW (itype))
+      else if (TREE_CODE (itype) == INTEGER_CST
+	       && TREE_OVERFLOW (itype))
 	{
 	  error ("overflow in array dimension");
 	  TREE_OVERFLOW (itype) = 0;

gcc/testsuite/ChangeLog

+2005-12-06  Roger Sayle  <roger@eyesopen.com>
+
+	PR c++/25263
+	* g++.dg/other/array2.C: New test case.
+
 2005-12-05  Geoffrey Keating  <geoffk@apple.com>
 
 	* gcc.dg/darwin-weakimport-3.c: New.

gcc/testsuite/g++.dg/other/array2.C

+// PR c++/25263
+// { dg-do compile }
+
+int x[1/0];  // { dg-warning "division by zero" }
+             // { dg-error "constant" "constant" { target *-*-* } 4 }
+