llvm dev - Dec 2012 - [LLVMdev] assert in InnerLoopVectorizer::createEmptyLoop

I am seeing an assert when I run this command:

$ clang -fno-strict-aliasing -target mips64el-unknown-linux -O3
-fomit-frame-pointer -S oggenc.i -o oggenc.ll -emit-llvm

It asserts when LoopVectorize.cpp:506 is executed. It looks like it is
complaining because it is trying to zero-extend an i64 (type
Count->getType() returns i64) to an i32 (IdxTy).

if (Count->getType() != IdxTy) {
    // The exit count can be of pointer type. Convert it to the correct
    // integer type.
    if (ExitCount->getType()->isPointerTy())
      Count = CastInst::CreatePointerCast(Count, IdxTy,
"ptrcnt.to.int",
Loc);
    else
      Count = CastInst::CreateZExtOrBitCast(Count, IdxTy, "zext.cnt",
Loc);
// <= this line
  }
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