31 lines
636 B
Rust
31 lines
636 B
Rust
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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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