re PR c++/7640 (g++ 3.3 ICE: SEGV in integer_zerop)

.:	PR c++/7640
	* c-semantics.c (genrtl_do_stmt): Cope with NULL cond.
testsuite:
	* g++.dg/other/do1.C: New test.

From-SVN: r57212

gcc/ChangeLog

+2002-09-16  Nathan Sidwell  <nathan@codesourcery.com>
+
+	* c-semantics.c (genrtl_do_stmt): Cope with NULL cond.
+
 2002-09-16  Geoffrey Keating  <geoffk@redhat.com>
 
 	* config/rs6000/rs6000.c (build_mask64_2_operands): Suppress

gcc/c-semantics.c

@@ -447,8 +447,9 @@ genrtl_do_stmt (t)
   /* Recognize the common special-case of do { ... } while (0) and do
      not emit the loop widgetry in this case.  In particular this
      avoids cluttering the rtl with dummy loop notes, which can affect
-     alignment of adjacent labels.  */
-  if (integer_zerop (cond))
+     alignment of adjacent labels.  COND can be NULL due to parse
+     errors.  */
+  if (!cond || integer_zerop (cond))
     {
       expand_start_null_loop ();
       expand_stmt (DO_BODY (t));

gcc/testsuite/ChangeLog

 2002-09-16  Nathan Sidwell  <nathan@codesourcery.com>
 
+	* g++.dg/other/do1.C: New test.
+	
 	* g++.dg/template/subst1.C: New test.
 	
 2002-09-16  Steve Ellcey  <sje@cup.hp.com>

gcc/testsuite/g++.dg/other/do1.C

+// { dg-do compile }
+
+// Copyright (C) 2002 Free Software Foundation, Inc.
+// Contributed by Nathan Sidwell 16 Sep 2002 <nathan@codesourcery.com>
+
+// PR 7640. ICE.
+
+void init ()
+{
+  do {  } while (0)
+  obj = 0;
+}