[LLVMbugs] [Bug 14641] New: Unknown mismatch! UNREACHABLE executed at lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp:212!

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=14641

             Bug #: 14641
           Summary: Unknown mismatch! UNREACHABLE executed at
                    lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp:212!
           Product: clang
           Version: trunk
          Platform: PC
        OS/Version: FreeBSD
            Status: NEW
          Severity: normal
          Priority: P
         Component: -New Bugs
        AssignedTo: unassignedclangbugs at nondot.org
        ReportedBy: M8R-9yw8a5 at mailinator.com
                CC: llvmbugs at cs.uiuc.edu
    Classification: Unclassified


1. source code (file name: f.c):

void f(void)
{
    int x;
    __asm__ (
        ""
        : "=f" (x)
    );
}

2. command line:

clang -c f.c

3. output:

Unknown mismatch!
UNREACHABLE executed at
/usr/home/devhc/llvmhead/llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp:212!
Stack dump:
0.    Program arguments: /usr/home/devhc/lllvm/bin/clang -cc1 -triple
i386-unknown-freebsd10.0 -emit-obj -mrelax-all -disable-free -main-file-name
f.c -mrelocation-model static -mdisable-fp-elim -masm-verbose
-mconstructor-aliases -target-cpu i486 -target-linker-version 2.17.50
-momit-leaf-frame-pointer -coverage-file
/usr/home/devhc/stuff/clang_internal_errors/unknown_mismatch/f.o -resource-dir
/usr/home/devhc/lllvm/bin/../lib/clang/3.3 -fmodule-cache-path
/var/tmp/clang-module-cache -fdebug-compilation-dir
/home/devhc/stuff/clang_internal_errors/unknown_mismatch -ferror-limit 19
-fmessage-length 127 -mstackrealign -fobjc-runtime=gnustep
-fdiagnostics-show-option -fcolor-diagnostics -o f.o -x c f.c 
1.    <eof> parser at end of file
2.    Code generation
3.    Running pass 'Function Pass Manager' on module 'f.c'.
4.    Running pass 'X86 DAG->DAG Instruction Selection' on function '@f'
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 170425)
Target: i386-unknown-freebsd10.0
Thread model: posix

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