def test_const_double_bitcast
    assert_equal "i64 0", LLVM::Double.from_f(0).bitcast_to(LLVM::Int64).to_s
    assert_equal "i64 4607182418800017408", LLVM::Double.from_f(1).bitcast_to(LLVM::Int64).to_s
    assert_equal "i64 -4616189618054758400", LLVM::Double.from_f(-1).bitcast_to(LLVM::Int64).to_s