[LLVMbugs] [Bug 15840] New: gstreamer causes assert "Wrong topological sorting", function InitDAGTopologicalSorting

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=15840

            Bug ID: 15840
           Summary: gstreamer causes assert "Wrong topological sorting",
                    function InitDAGTopologicalSorting
           Product: new-bugs
           Version: trunk
          Hardware: PC
                OS: FreeBSD
            Status: NEW
          Severity: normal
          Priority: P
         Component: new bugs
          Assignee: unassignedbugs at nondot.org
          Reporter: dimitry at andric.com
                CC: llvmbugs at cs.uiuc.edu
    Classification: Unclassified

Created attachment 10423
  --> http://llvm.org/bugs/attachment.cgi?id=10423&action=edit
Testcase for InitDAGTopologicalSorting assertion failure

Reduced testcase attached.  Compiling with "-target i386-unknown-freebsd10 -O2
-c gstatomicqueue-testcase.c" results in:

Assertion failed: (Node2Index[SU->NodeNum] > Node2Index[I->getSUnit()->NodeNum]
&& "Wrong topological sorting"), function InitDAGTopologicalSorting, file
/share/dim/src/llvm/trunk/lib/CodeGen/ScheduleDAG.cpp, line 511.
Stack dump:
0.      Program arguments:
/home/dim/obj/llvm-180108M-trunk-freebsd10-i386-aconf-rel-1/Release+Asserts/bin/clang
-cc1 -triple i386-unknown-freebsd10 -emit-obj -disable-free -main-file-name
gstatomicqueue-testcase.c -mrelocation-model static -mdisable-fp-elim
-masm-verbose -mconstructor-aliases -target-cpu i486 -target-linker-version
2.23.1 -coverage-file
/share/dim/src/llvm/bugs/gstreamer/gstatomicqueue-testcase.o -resource-dir
/home/dim/obj/llvm-180108M-trunk-freebsd10-i386-aconf-rel-1/Release+Asserts/bin/../lib/clang/3.3
-O2 -fdebug-compilation-dir /share/dim/src/llvm/bugs/gstreamer -ferror-limit 19
-fmessage-length 278 -mstackrealign -fobjc-runtime=gnustep
-fobjc-default-synthesize-properties -fdiagnostics-show-option
-fcolor-diagnostics -backend-option -vectorize-loops -o
gstatomicqueue-testcase.o -x c gstatomicqueue-testcase.c
1.      <eof> parser at end of file
2.      Code generation
3.      Running pass 'Function Pass Manager' on module
'gstatomicqueue-testcase.c'.
4.      Running pass 'X86 DAG->DAG Instruction Selection' on function
'@gst_atomic_queue_push'
clang: error: unable to execute command: Abort trap (core dumped)
clang: error: clang frontend command failed due to signal (use -v to see
invocation)
clang version 3.3 (trunk 180108)
Target: i386-unknown-freebsd10
Thread model: posix

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