message: Avoid redundant bitcast.
  When creating the GlobalVariable for constants, we don't need to create a
  bitcast to the correct type. This is already done in
  HloToIrBindings::BindHloToIrValue().
diff: @@ -94,10 +94,7 @@ Status IrEmitter::HandleConstant(HloInstruction* constant) {
  << std::endl
  << " its type: "
  << llvm_ir::DumpToString(*global_for_const->getType());
  - llvm::Constant* shape_constant = llvm::ConstantExpr::getBitCast(
  - global_for_const,
  - llvm_ir::ShapeToIrType(literal.shape(), module_)->getPointerTo());
  - bindings_.BindHloToIrValue(*constant, shape_constant);
  + bindings_.BindHloToIrValue(*constant, global_for_const);
  return Status::OK();
  }
  