re PR c++/35315 (ICE with attribute transparent_union)

2008-02-29  Douglas Gregor  <doug.gregor@gmail.com>

	PR c++/35315
	* tree-inline.c (build_duplicate_type): When we make a
	duplicate type, make it unique in the canonical types system.

2008-02-29  Douglas Gregor  <doug.gregor@gmail.com>

	PR c++/35315
	* g++.dg/ext/attrib32.C: Add another test case.

From-SVN: r132779

gcc/ChangeLog

+2008-02-29  Douglas Gregor  <doug.gregor@gmail.com>
+
+	PR c++/35315
+	* tree-inline.c (build_duplicate_type): When we make a
+	duplicate type, make it unique in the canonical types system.
+
 2008-02-29  Tom Tromey  <tromey@redhat.com>
 
 	* toplev.c (input_file_stack, input_file_stack_tick, fs_p,

gcc/testsuite/ChangeLog

+2008-02-29  Douglas Gregor  <doug.gregor@gmail.com>
+
+	PR c++/35315
+	* g++.dg/ext/attrib32.C: Add another test case.
+
 2008-02-29  Tom Tromey  <tromey@redhat.com>
 
 	* g++.dg/warn/pragma-system_header2.C: Ignore "included from"

gcc/testsuite/g++.dg/ext/attrib32.C

@@ -9,3 +9,14 @@ void bar()
 {
   foo(0);
 }
+
+typedef union U1 { int i; } U2 __attribute__((transparent_union));
+
+static void foo2(U1) {}
+static void foo2(U2) {}
+
+void bar2(U1 u1, U2 u2)
+{
+  foo2(u1);
+  foo2(u2);
+}

gcc/tree-inline.c

@@ -3723,5 +3723,7 @@ build_duplicate_type (tree type)
 
   pointer_map_destroy (id.decl_map);
 
+  TYPE_CANONICAL (type) = type;
+
   return type;
 }