[LLVMbugs] [Bug 766] NEW: Teach spiller how to spill from one regclass to another

[bugzilla-daemon at cs.uiuc.edu]

http://llvm.org/bugs/show_bug.cgi?id=766

           Summary: Teach spiller how to spill from one regclass to another
           Product: libraries
           Version: trunk
          Platform: Macintosh
        OS/Version: MacOS X
            Status: NEW
          Severity: normal
          Priority: P2
         Component: Register Allocator
        AssignedTo: unassignedbugs at nondot.org
        ReportedBy: natebegeman at mac.com


There are currently several hacks in PPCRegisterInfo.cpp because it is trying to save and restore register to 
stack slots that cannot be used in load and store instructions.  We should teach the register allocator / 
spiller to spill CR & LR into a GPR, not memory.



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