[Bug c++/56742] Optimization bug lead to uncaught throw

ktietz at gcc dot gnu.org gcc-bugzilla@gcc.gnu.org
Tue Mar 26 21:14:00 GMT 2013


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56742

--- Comment #2 from Kai Tietz <ktietz at gcc dot gnu.org> 2013-03-26 21:14:23 UTC ---
Hmm, yes indeed it is the -freorder-blocks option. One solution is to disallow
after reload for SEH-target to modify jumps.

The following patch fixes the issue for me.


Index: i386.c
===================================================================
--- i386.c      (Revision 197118)
+++ i386.c      (Arbeitskopie)
@@ -3941,6 +3941,19 @@
   register_pass (&insert_vzeroupper_info);
 }

+/* Implement TARGET_CANNOT_MODIFY_JUMPS_P.  */
+static bool
+ix86_cannot_modify_jumps_p (void)
+{
+  if (TARGET_SEH && reload_completed
+      && cfun)
+    return true;
+  return false;
+}
+
+#undef  TARGET_CANNOT_MODIFY_JUMPS_P
+#define TARGET_CANNOT_MODIFY_JUMPS_P ix86_cannot_modify_jumps_p
+
 /* Update register usage after having seen the compiler flags.  */

 static void



More information about the Gcc-bugs mailing list