mirror of https://github.com/rust-lang/rust.git
55 lines
979 B
Rust
55 lines
979 B
Rust
//@ compile-flags: -Copt-level=3
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#![crate_type = "lib"]
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#![feature(cold_path)]
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use std::hint::cold_path;
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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 test1(x: bool) {
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if x {
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path_a();
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} else {
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cold_path();
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path_b();
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}
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// CHECK-LABEL: @test1(
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// CHECK: br i1 %x, label %bb1, label %bb2, !prof ![[NUM:[0-9]+]]
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// CHECK: bb2:
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// CHECK: path_b
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// CHECK: bb1:
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// CHECK: path_a
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}
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#[no_mangle]
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pub fn test2(x: i32) {
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match x > 0 {
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true => path_a(),
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false => {
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cold_path();
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path_b()
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}
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}
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// CHECK-LABEL: @test2(
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// CHECK: br i1 %_2, label %bb2, label %bb1, !prof ![[NUM]]
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// CHECK: bb1:
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// CHECK: path_b
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// CHECK: bb2:
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// CHECK: path_a
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}
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// CHECK: ![[NUM]] = !{!"branch_weights", {{(!"expected", )?}}i32 2000, i32 1}
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