[LLVMbugs] [Bug 5024] New: Another regscavenger assertion

[bugzilla-daemon at cs.uiuc.edu]

http://llvm.org/bugs/show_bug.cgi?id=5024

           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: llvmbugs at cs.uiuc.edu


Created an attachment (id=3540)
 --> (http://llvm.org/bugs/attachment.cgi?id=3540)
Reduced test

Consider the attached bytecode. Currently we're failing with:

$ ./llc -mattr=+neon bugpoint-reduced-simplified.bc
llc: /home/asl/proj/llvm/src_arm/lib/CodeGen/RegisterScavenging.cpp:219: void
llvm::RegScavenger::forward(): Assertion `isUsed(Reg) && "Using an undefined
register!"' failed.


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