[LLVMbugs] [Bug 12792] New: Possible infinite loop in compile

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=12792

             Bug #: 12792
           Summary: Possible infinite loop in compile
           Product: clang
           Version: 3.0
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: -New Bugs
        AssignedTo: unassignedclangbugs at nondot.org
        ReportedBy: johnbmudd at gmail.com
                CC: llvmbugs at cs.uiuc.edu
    Classification: Unclassified


Created attachment 8528
  --> http://llvm.org/bugs/attachment.cgi?id=8528
bzip2 compressed source code file.

I ran into what seems to be an infinite loop trying to compile the attached
code. I let it run for at least 30 minutes before killing it.

Here's the command:
clang -fno-strict-aliasing -g -O2 -DNDEBUG -g -fwrapv -O3 -Wall
-Wstrict-prototypes -fPIC
-I/home/mudd/pkgs/Python-2.7.2.install/include/python2.7 -c drug_table.c -o
build/temp.linux-i686-2.7/drug_table.o


It's not necessarily a clang bug. I tried with gcc and got the following output
after about 10 minutes of compiling. It (gcc) did produce a .o output file.

gcc -fno-strict-aliasing -g -O2 -DNDEBUG -g -fwrapv -O3 -Wall
-Wstrict-prototypes -fPIC
-I/home/mudd/pkgs/Python-2.7.2.install/include/python2.7 -c drug_table.c -o
build/temp.linux-i686-2.7/drug_table.o
drug_table.c: In function ‘initdrug_table’:
drug_table.c:81869:16: note: variable tracking size limit exceeded with
-fvar-tracking-assignments, retrying without

Note: The program is the output of a Python program that has been translated to
C via Cython compiler.



$ clang --version
clang version 3.0 (tags/RELEASE_30/final)
Target: i386-pc-linux-gnu
Thread model: posix
$
$ gcc --version
gcc (Ubuntu/Linaro 4.6.1-9ubuntu3) 4.6.1
Copyright (C) 2011 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

$
$ uname -a
Linux mudd-PC 3.0.0-19-generic-pae #33-Ubuntu SMP Thu Apr 19 20:59:10 UTC 2012
i686 i686 i386 GNU/Linux
$

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