[LLVMbugs] [Bug 7333] New: infinite loop when compiling SPEC CPU2006's 465.tonto

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=7333

           Summary: infinite loop when compiling SPEC CPU2006's 465.tonto
           Product: tools
           Version: trunk
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: gfortran
        AssignedTo: unassignedbugs at nondot.org
        ReportedBy: kenneth.hoste at ugent.be
                CC: llvmbugs at cs.uiuc.edu


When compiling the 465.tonto SPEC CPU2006 benchmark, the llvm-gcc-4.2 (LLVM
2.7) gfortran gets stuck 
while compiling one of the Fortran source files. I've seen it running for over
2 hours and more without finishing the job. This occurs on Linux/x86-64.

gfortran trips as follows:

/path/to/LLVM/2.7/llvm-gcc-4.2-2.7/bin/gfortran -c -o atomvec.fppized.o -O2
atomvec.fppized.f90

The error does not occur at -O0, nor does it with the dragonegg-2.7 plugin for
gcc-4.5.0 at -O2.

I've tried to reduce a testcase from the atomvec.fppized.f90 file using delta,
but since it still requires 4 different modules, I don't think including it
will be of much use. Suggestions welcome.

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