https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63815
--- Comment #11 from Uroš Bizjak <ubizjak at gmail dot com> ---
(In reply to H.J. Lu from comment #10)
> But I am having a hard time to add it to gcc testsuite.
IMO, the following should be sufficient:
--cut here--
Index: g++.dg/other/pr63815.C
===================================================================
--- g++.dg/other/pr63815.C (revision 0)
+++ g++.dg/other/pr63815.C (working copy)
@@ -0,0 +1,50 @@
+// PR target/63815
+// { dg-do run { target { { i?86-*-* x86_64-*-* } && lp64 } } }
+// { dg-options "-mcmodel=large" }
+// { dg-additional-options "-fpic" { target fpic } }
+
+struct ICCStringClass
+{
+ virtual int CreateString (int) = 0;
+};
+
+struct AGSCCDynamicObject
+{
+ virtual void Unserialize () = 0;
+};
+
+struct ScriptString:AGSCCDynamicObject, ICCStringClass
+{
+ virtual int CreateString (int);
+ virtual void Unserialize ();
+};
+
+int
+__attribute__ ((noinline))
+CreateNewScriptString (int fromText, bool reAllocate = true)
+{
+ return fromText;
+}
+
+int
+__attribute__ ((noinline))
+ScriptString::CreateString (int fromText)
+{
+ return CreateNewScriptString (fromText);
+}
+
+void
+__attribute__ ((noinline))
+ScriptString::Unserialize ()
+{
+}
+
+int
+main ()
+{
+ ICCStringClass *x = new ScriptString;
+
+ if (x->CreateString (1) != 1)
+ __builtin_abort ();
+ return 0;
+}
--cut here--
Currently, this test crashes, and when fixed, there is little chance that the
(allocatable) PIC register from main equals r11 in the thunk.
