re PR lto/40902 (LTO doesn't merge CV differences properly)

2009-10-05  Richard Guenther  <rguenther@suse.de>

	PR lto/40902
	* lto-symtab.c (lto_compatible_attributes_p): Remove.
	(external_aggregate_decl_p): Likewise.
	(lto_symtab_compatible): Re-structure.  Remove dead code.
	For variables ignore toplevel qualifiers when comparing types.
	Issue warnings, not errors for mismatched user-alignment.

	* gcc.dg/lto/20091005-1_0.c: New testcase.
	* gcc.dg/lto/20091005-1_1.c: Likewise.

From-SVN: r152452

gcc/ChangeLog

 2009-10-05  Richard Guenther  <rguenther@suse.de>
 
+	PR lto/40902
+	* lto-symtab.c (lto_compatible_attributes_p): Remove.
+	(external_aggregate_decl_p): Likewise.
+	(lto_symtab_compatible): Re-structure.  Remove dead code.
+	For variables ignore toplevel qualifiers when comparing types.
+	Issue warnings, not errors for mismatched user-alignment.
+
+2009-10-05  Richard Guenther  <rguenther@suse.de>
+
 	PR lto/41552
 	PR lto/41487
 	* lto-symtab.c (struct lto_symtab_base_def): Remove.

gcc/testsuite/ChangeLog

 2009-10-05  Richard Guenther  <rguenther@suse.de>
 
+	PR lto/40902
+	* gcc.dg/lto/20091005-1_0.c: New testcase.
+	* gcc.dg/lto/20091005-1_1.c: Likewise.
+
+2009-10-05  Richard Guenther  <rguenther@suse.de>
+
 	PR lto/41552
 	PR lto/41487
 	* g++.dg/lto/20091002-1_0.C: Adjust flags.

gcc/testsuite/gcc.dg/lto/20091005-1_0.c

+/* { dg-lto-do run } */
+
+const int i[10] = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 };

gcc/testsuite/gcc.dg/lto/20091005-1_1.c

+extern int i[10];
+int main () { return i[0]; }