//@ compile-flags: -O #![crate_type = "lib"] #![feature(core_intrinsics)] use std::intrinsics::unlikely; #[inline(never)] #[no_mangle] pub fn path_a() { println!("path a"); } #[inline(never)] #[no_mangle] pub fn path_b() { println!("path b"); } #[no_mangle] pub fn test_unlikely(x: bool) { if unlikely(x) { path_a(); } else { path_b(); } } // CHECK-LABEL: @test_unlikely( // CHECK: br i1 %x, label %bb2, label %bb4, !prof ![[NUM:[0-9]+]] // CHECK: bb4: // CHECK: path_b // CHECK: bb2: // CHECK-NOT: cold_path // CHECK: path_a // CHECK: ![[NUM]] = !{!"branch_weights", {{(!"expected", )?}}i32 1, i32 2000}