[Bug jit/64722] On 2nd time libgccjit is run in-process on i686, generated code clobbers %ebx register

[dmalcolm at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64722

--- Comment #2 from David Malcolm <dmalcolm at gcc dot gnu.org> ---
Indeed, adding this to toplev.c fixes the issue:
@@ -2166,7 +2169,8 @@ toplev::finalize (void)
 {
   rtl_initialized = false;
   this_target_rtl->target_specific_initialized = false;
+  this_target_rtl->x_pic_offset_table_rtx = NULL;

   /* Needs to be called before cgraph_c_finalize since it uses symtab.  */
   ipa_reference_c_finalize ();

fixes the issue; 5 iterations of test-hello-world.c run to completion.