[LLVMbugs] [Bug 19401] New: clang-compiled gcc has reproducible internal compiler error

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=19401

            Bug ID: 19401
           Summary: clang-compiled gcc has reproducible internal compiler
                    error
           Product: new-bugs
           Version: trunk
          Hardware: All
                OS: NetBSD
            Status: NEW
          Severity: normal
          Priority: P
         Component: new bugs
          Assignee: unassignedbugs at nondot.org
          Reporter: tk at giga.or.at
                CC: llvmbugs at cs.uiuc.edu
    Classification: Unclassified

I'm using clang coming with NetBSD, on NetBSD-6.99.40/amd64, currently:

clang version 3.5 (trunk 202566)
Target: x86_64--netbsd
Thread model: posix

NetBSD also comes with a version of gcc:

gcc (NetBSD nb2 20140304) 4.8.3

When using that clang to compile that version of gcc and then use gcc to
compile software, a reproducible internal compiler error appears that does not
happen when gcc is compiled with gcc.

The original bug report was filed for a compilation problem with gambatte, see

http://gnats.netbsd.org/48731

but the same problem also happened with pcre.

This problem was then reported upstream to gcc

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60807

until it was found that this only happens when gcc is compiled with clang.

This looks really hard to debug, but I wanted to report it anyway. Let me know
how to proceed.

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