[LLVMbugs] [Bug 1011] NEW: assertion failed while compiling libmng

[bugzilla-daemon at cs.uiuc.edu]

http://llvm.org/bugs/show_bug.cgi?id=1011

           Summary: assertion failed while compiling libmng
           Product: libraries
           Version: trunk
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: P2
         Component: Backend: X86
        AssignedTo: unassignedbugs at nondot.org
        ReportedBy: asl at math.spbu.ru


While compiling libmng (via llvm-gcc4 -O2) I've got an assertion:

cc1: /home/asl/proj/llvm/src/lib/CodeGen/SelectionDAG/SelectionDAG.cpp:1116:
llvm::SDOperand llvm::SelectionDAG::getNode(unsigned int, llvm::MVT::ValueType,
llvm::SDOperand): Assertion `Operand.getValueType() > VT && "Invalid truncate
node, src < dst!"' failed.
libmng_pixels.i:137: internal compiler error: Aborted
Please submit a full bug report,
with preprocessed source if appropriate.
See <URL:http://llvm.org/bugs> for instructions.

Please find:
1. Original source
2. Reduced sources (via delta).

Everything was ok without any optimizations (but no ok with just -O), so the
problem itself can be not in backend, but in some optimization passes.



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