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Subject: [Bug rtl-optimization/45353]  New: ICE: RTL check: expected elt 3 type 'B', have '0' (rtx barrier) in sel_bb_head, at sel-sched-ir.c:4329 with -fselective-scheduling and __builtin_unreachable()
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Command line:
$ gcc -O -fschedule-insns -fselective-scheduling testcase.c

Compiler output:
$ gcc -O -fschedule-insns -fselective-scheduling testcase.ctestcase.c: In
function 'foo':
testcase.c:4:1: internal compiler error: RTL check: expected elt 3 type 'B',
have '0' (rtx barrier) in sel_bb_head, at sel-sched-ir.c:4329
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.

----- testcase.c ----
void foo ()
{
  __builtin_unreachable ();
}
---------------------
Current testcases from testsuite, such as gcc.dg/builtin-unreachable-3.c, ICE
as well with given flags.

Tested revisions:
r163371 - crash


-- 
           Summary: ICE: RTL check: expected elt 3 type 'B', have '0' (rtx
                    barrier) in sel_bb_head, at sel-sched-ir.c:4329 with -
                    fselective-scheduling and __builtin_unreachable()
           Product: gcc
           Version: 4.6.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: rtl-optimization
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: zsojka at seznam dot cz
  GCC host triplet: x86_64-pc-linux-gnu
GCC target triplet: x86_64-pc-linux-gnu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45353