[LLVMbugs] [Bug 5955] New: Another regscavenger assertion

[bugzilla-daemon at cs.uiuc.edu]

http://llvm.org/bugs/show_bug.cgi?id=5955

           Summary: Another regscavenger assertion
           Product: libraries
           Version: trunk
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: P2
         Component: Backend: ARM
        AssignedTo: unassignedbugs at nondot.org
        ReportedBy: asl at math.spbu.ru
                CC: evan.cheng at apple.com, llvmbugs at cs.uiuc.edu,
                    grosbach at apple.com, stoklund at 2pi.dk


Conider attached testcase. llc -mattr=+neon yields:

$ ./llc -mattr=+neon bugpoint-reduced-simplified2.ll
llc: /home/asl/proj/llvm/src_arm/lib/CodeGen/RegisterScavenging.cpp:342:
unsigned int llvm::RegScavenger::scavengeRegister(const
llvm::TargetRegisterClass*, llvm::ilist_iterator<llvm::MachineInstr>, int):
Assertion `ScavengingFrameIndex >= 0 && "Cannot scavenge register without an
emergency spill slot!"' failed.


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