[LLVMbugs] [Bug 5155] New: Values should support placement new

[bugzilla-daemon at cs.uiuc.edu]

http://llvm.org/bugs/show_bug.cgi?id=5155

           Summary: Values should support placement new
           Product: libraries
           Version: trunk
          Platform: PC
        OS/Version: All
            Status: NEW
          Severity: enhancement
          Priority: P2
         Component: Core LLVM classes
        AssignedTo: unassignedbugs at nondot.org
        ReportedBy: jyasskin at google.com
                CC: llvmbugs at cs.uiuc.edu


I'm trying to write a test that the ExecutionEngine handles a GlobalVariable
being destroyed and a new one being created at the same address. The normal way
to do this would be to allocate a char[sizeof(GlobalVariable)] and use
placement new to put the GlobalVariable there. This doesn't work for subclasses
of User since it hangs extra data off the start of the object.

It would be nice if placement new (or CreateAt(void*,...) as appropriate) were
defined so we could write this kind of test.


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