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Subject: [Bug rtl-optimization/55270] [4.8 Regression] ICE in get_loop_body, at cfgloop.c:823
Date: Tue, 29 Jan 2013 09:39:00 -0000
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55270

--- Comment #12 from Marek Polacek <mpolacek at gcc dot gnu.org> 2013-01-29 09:38:59 UTC ---
(In reply to comment #11)
> I'll test an alternative patch.

FYI, I've tried this one:
--- a/gcc/loop-init.c
+++ b/gcc/loop-init.c
@@ -57,6 +57,7 @@ loop_optimizer_init (unsigned flags)

       /* Ensure that the dominators are computed, like flow_loops_find does. 
*/
       calculate_dominance_info (CDI_DOMINATORS);
+      fix_loop_structure (NULL);

 #ifdef ENABLE_CHECKING
       verify_loop_structure ();

it cures this ICE, and was even successfully regtested.