[LLVMbugs] [Bug 709] NEW: mem* intrinsics are not 64 bit safe

[bugzilla-daemon at cs.uiuc.edu]

http://llvm.cs.uiuc.edu/bugs/show_bug.cgi?id=709

           Summary: mem* intrinsics are not 64 bit safe
           Product: libraries
           Version: trunk
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: P2
         Component: Core LLVM classes
        AssignedTo: unassignedbugs at nondot.org
        ReportedBy: alenhar2 at uiuc.edu


The definition of the memcpy and friends do match the definition needed and used
on 64 bit hosts.  the length field should be a ulong.

However, to stay consistent with the fixed type based on name, we need 2
intrinsics for each mem* intrinsic.  A 32 bit version and a 64 bit version.

on alpha llvm.memcpy is void %llvm.memcpy(sbyte*, sbyte*, ulong, uint), whereas
SimplifyLibCalls was inserting llvm.memcpy(sbyte*, sbyte*, uint, uint) which is
not correct (but matches LangRef).



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