[LLVMbugs] [Bug 9858] New: targetdata strings starting with "-" causing assertion failures

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=9858

           Summary: targetdata strings starting with "-" causing assertion
                    failures
           Product: libraries
           Version: trunk
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: Target Description Classes
        AssignedTo: unassignedbugs at nondot.org
        ReportedBy: bob.wilson at apple.com
                CC: llvmbugs at cs.uiuc.edu


The llvm-gcc-x86_64-linux-selfhost and clang-x86_64-linux-selfhost-rel
buildbots, running on osu7, have been failing since 5/2/11:

http://lists.cs.uiuc.edu/pipermail/llvm-testresults/2011-May/032970.html
http://lists.cs.uiuc.edu/pipermail/llvm-testresults/2011-May/032971.html

The symptom is that tests containing targetdata strings beginning with "-",
e.g., "-p:64:64:64", get assertion failures like this:

opt:
/build/buildbot-llvm/clang-x86_64-linux-selfhost-rel/llvm.src/lib/Target/TargetData.cpp:166:
void llvm::TargetData::init(llvm::StringRef): Assertion `!Specifier.empty() &&
"Can't be empty here"' failed.
0  opt             0x000000000091148f
1  opt             0x0000000000911989
2  libpthread.so.0 0x00002b4fe7e86020
3  libc.so.6       0x00002b4fe8a6d415 gsignal + 53
4  libc.so.6       0x00002b4fe8a70690 abort + 384
5  libc.so.6       0x00002b4fe8a665c1 __assert_fail + 241
6  opt             0x00000000007a08bd llvm::TargetData::init(llvm::StringRef) +
1933
7  opt             0x00000000004bf346 main + 2454
8  libc.so.6       0x00002b4fe8a59eed __libc_start_main + 253
9  opt             0x00000000004acaa9

I don't see anything that changes around that time that would cause this, and
we're not seeing it on any other testers, but it would be good to get those
buildbots fixed soon.

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