[LLVMbugs] [Bug 7254] New: unrecognized instruction lock

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=7254

           Summary: unrecognized instruction lock
           Product: new-bugs
           Version: unspecified
          Platform: Macintosh
        OS/Version: MacOS X
            Status: NEW
          Severity: normal
          Priority: P
         Component: new bugs
        AssignedTo: unassignedbugs at nondot.org
        ReportedBy: niels.pfeffer at googlemail.com
                CC: llvmbugs at cs.uiuc.edu


When trying to compile:
  static inline void inc(int64_t* atomic)
  {
    __asm__ __volatile__
    (
      "lock incq %0\n"
        : "=m" (*atomic)
        : "m" (*atomic)
    );
  }
I get:
<inline asm>:1:2: error: unrecognized instruction
        lock incq (%rax)

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