[LLVMbugs] [Bug 6405] New: When built with --enable-expensive-checks , llvm/clang are sometime stuck in an endless loop

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=6405

           Summary: When built with --enable-expensive-checks , llvm/clang
                    are sometime stuck in an endless loop
           Product: new-bugs
           Version: trunk
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Severity: enhancement
          Priority: P5
         Component: new bugs
        AssignedTo: unassignedbugs at nondot.org
        ReportedBy: yann at droneaud.fr
                CC: llvmbugs at cs.uiuc.edu


llvm/clang is configured with following parameters

./configure CXXFLAGS="-O2 -g -march=native" CFLAGS="-O2 -g -march=native"
--prefix=/opt/llvm/ --enable-expensive-checks --enable-debug-runtime
--enable-debug-symbols --enable-targets=x86

llvm/clang is sometimes not able to finish to compile some source files, for
example some test case (from make check).

Even "simple" code like 
<http://source.winehq.org/git/wine.git/?a=blob;f=libs/port/mkstemps.c;h=1a091a7f97400c7d76c6a18ac70be3227b139fa1;hb=520a2830d5319185021efc973f57f603d15968f6>
take hours to compile:

  PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND
20299 xxxxxxx   20   0 28672  14m  11m R   99  0.4 151:25.66 clang

More than 2 hours and is still running !

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