41 lines
1.1 KiB
Rust
41 lines
1.1 KiB
Rust
// Copyright 2016 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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// compile-flags: -C no-prepopulate-passes
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#![crate_type = "lib"]
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#![feature(core_intrinsics)]
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use std::intrinsics::{likely,unlikely};
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#[no_mangle]
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pub fn check_likely(x: i32, y: i32) -> Option<i32> {
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unsafe {
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// CHECK: call i1 @llvm.expect.i1(i1 %{{.*}}, i1 true)
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if likely(x == y) {
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None
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} else {
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Some(x + y)
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}
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}
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}
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#[no_mangle]
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pub fn check_unlikely(x: i32, y: i32) -> Option<i32> {
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unsafe {
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// CHECK: call i1 @llvm.expect.i1(i1 %{{.*}}, i1 false)
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if unlikely(x == y) {
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None
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} else {
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Some(x + y)
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}
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}
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}
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