add test for using target features in doctests
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// Copyright 2017 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution and at
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// http://rust-lang.org/COPYRIGHT.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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// only-x86_64
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// compile-flags:--test
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// should-fail
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// no-system-llvm
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// #49723: rustdoc didn't add target features when extracting or running doctests
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#![feature(doc_cfg)]
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/// Foo
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///
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/// # Examples
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///
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/// ```
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/// #![feature(cfg_target_feature)]
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///
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/// #[cfg(target_feature = "sse")]
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/// assert!(false);
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/// ```
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#[doc(cfg(target_feature = "sse"))]
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pub unsafe fn foo() {}
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