[LLVMbugs] [Bug 5614] New: Another regscavenger assertion

[bugzilla-daemon at cs.uiuc.edu]

http://llvm.org/bugs/show_bug.cgi?id=5614

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


Created an attachment (id=3869)
 --> (http://llvm.org/bugs/attachment.cgi?id=3869)
Testcase

Consider the .ll attached.

We have:

$ ./llc subreg.ll -mcpu=cortex-a8
llc: /home/asl/proj/llvm/src_arm/lib/CodeGen/RegisterScavenging.cpp:193: void
llvm::RegScavenger::forward(): Assertion `SubUsed && "Using an undefined
register!"' failed.


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