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36 lines
649 B
Rust
36 lines
649 B
Rust
//@ compile-flags: -Copt-level=3
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#![crate_type = "lib"]
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#![feature(core_intrinsics)]
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use std::intrinsics::likely;
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#[inline(never)]
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#[no_mangle]
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pub fn path_a() {
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println!("path a");
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}
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#[inline(never)]
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#[no_mangle]
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pub fn path_b() {
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println!("path b");
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}
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#[no_mangle]
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pub fn test_likely(x: bool) {
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if likely(x) {
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path_a();
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} else {
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path_b();
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}
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}
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// CHECK-LABEL: @test_likely(
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// CHECK: br i1 %x, label %bb2, label %bb3, !prof ![[NUM:[0-9]+]]
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// CHECK: bb3:
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// CHECK-NOT: cold_path
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// CHECK: path_b
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// CHECK: bb2:
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// CHECK: path_a
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// CHECK: ![[NUM]] = !{!"branch_weights", {{(!"expected", )?}}i32 2000, i32 1}
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