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

bugzilla-daemon at llvm.org bugzilla-daemon at llvm.org
Fri Apr 11 07:36:58 PDT 2014


            Bug ID: 19401
           Summary: clang-compiled gcc has reproducible internal compiler
           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


but the same problem also happened with pcre.

This problem was then reported upstream to gcc


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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