[LLVMbugs] [Bug 8949] New: Redefining a weak symbol crashes with integrated as

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=8949

           Summary: Redefining a weak symbol crashes with integrated as
           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: joerg at NetBSD.org
                CC: llvmbugs at cs.uiuc.edu


Consider:

asm("bar:\n.weak foo\nfoo = bar");

int foo(void)
{
    return 0;
}

Assembling first and pushing the result through the integrated assembler works
and correctly flags the redefinition. Compiling this directly with the
integrated assembler crashes with:

#2  0x00007ffff6cada71 in __assert_fail (
    assertion=0x170c300 "!Symbol->isVariable() && \"Cannot emit a variable
symbol!\"", file=<value optimized out>, line=100, 
    function=0x1714780 "virtual void
llvm::MCObjectStreamer::EmitLabel(llvm::MCSymbol*)") at assert.c:81
#3  0x00000000010b0d89 in llvm::MCObjectStreamer::EmitLabel (
    this=<value optimized out>, Symbol=0x1d629f0)
    at
/home/joerg/work/infrastructure/llvm.org/llvm/lib/MC/MCObjectStreamer.cpp:100
#4  0x00000000010a0bcc in (anonymous namespace)::MCELFStreamer::EmitLabel (
    this=0x1d5fd60, Symbol=0x3fc)
    at
/home/joerg/work/infrastructure/llvm.org/llvm/lib/MC/MCELFStreamer.cpp:191
#5  0x0000000000da248e in llvm::AsmPrinter::EmitFunctionEntryLabel (
    this=0x1d631f0)
    at
/home/joerg/work/infrastructure/llvm.org/llvm/lib/CodeGen/AsmPrinter/AsmPrinter.cpp:468
#6  0x0000000000da5333 in llvm::AsmPrinter::EmitFunctionHeader (
    this=0x1d631f0)

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