[LLVMbugs] [Bug 2936] New: wrong x86 asm symbol name decoration

[bugzilla-daemon at cs.uiuc.edu]

http://llvm.org/bugs/show_bug.cgi?id=2936

           Summary: wrong x86 asm symbol name decoration
           Product: libraries
           Version: 2.4
          Platform: PC
        OS/Version: Windows XP
            Status: NEW
          Severity: normal
          Priority: P2
         Component: Backend: X86
        AssignedTo: unassignedbugs at nondot.org
        ReportedBy: ubub at gmx.net
                CC: llvmbugs at cs.uiuc.edu


Created an attachment (id=2124)
 --> (http://llvm.org/bugs/attachment.cgi?id=2124)
testcase

when dllexport'ing functions with llvm on the x86 cygwin platform two bugs
arose:

1. the X86ATTAsmPrinter uses the properly decorated function names in the
function definition, but exports the undecorated names.

2. both, the X86ATTAsmPrinter and X86IntelAsmPrinter use an incorrectly
decorated name when calling a fastcall/stdcall function. this only happens if
the function is called before it is defined.

I'm attaching a single testcase to reproduce both problems.
It is only reproduceable with the 2.4 branch on cygwin or mingw.

Additionally I'm providing a workaround (not a fully tested patch).


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