[LLVMbugs] [Bug 7158] New: Assertion in DAG combiner

bugzilla-daemon at llvm.org bugzilla-daemon at llvm.org
Mon May 17 15:44:16 PDT 2010


           Summary: Assertion in DAG combiner
           Product: libraries
           Version: trunk
          Platform: PC
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: P
         Component: Common Code Generator Code
        AssignedTo: unassignedbugs at nondot.org
        ReportedBy: asl at math.spbu.ru
                CC: llvmbugs at cs.uiuc.edu

Created an attachment (id=4899)
 --> (http://llvm.org/bugs/attachment.cgi?id=4899)

Consider the attached testcase. I'm seeing:

$ ./llc -mcpu=cortex-a8 bugpoint-reduced-simplified.ll
llc: /home/asl/proj/llvm/src_arm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp:6353:
llvm::SDValue<unnamed>::DAGCombiner::SimplifyVBinOp(llvm::SDNode*): Assertion
`(Ops.back().getOpcode() == ISD::UNDEF || Ops.back().getOpcode() ==
ISD::Constant || Ops.back().getOpcode() == ISD::ConstantFP) && "Scalar binop
didn't fold!"' failed.

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