[LLVMbugs] [Bug 4789] New: Assertion in Thumb2 code

[bugzilla-daemon at cs.uiuc.edu]

http://llvm.org/bugs/show_bug.cgi?id=4789

           Summary: Assertion in Thumb2 code
           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=3379)
 --> (http://llvm.org/bugs/attachment.cgi?id=3379)
Reduced .ll

Consider the attached testcase. We're having currently:

./llc bugpoint-reduced-simplified.bc -mattr=+neon
llc: /home/asl/proj/llvm/src/lib/Target/ARM/Thumb2InstrInfo.cpp:417: int
llvm::rewriteT2FrameIndex(llvm::MachineInstr&, unsigned int, unsigned int, int,
const llvm::ARMBaseInstrInfo&): Assertion `AddrMode == ARMII::AddrMode5'
failed.

Also, the same file yields infinite loop in the codegen in ARM mode
(-march=armv7-elf).


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