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-rw-r--r--src/test/codegen/intrinsics/likely.rs30
1 files changed, 30 insertions, 0 deletions
diff --git a/src/test/codegen/intrinsics/likely.rs b/src/test/codegen/intrinsics/likely.rs
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index 000000000..c5a0185bd
--- /dev/null
+++ b/src/test/codegen/intrinsics/likely.rs
@@ -0,0 +1,30 @@
+// compile-flags: -C no-prepopulate-passes
+
+#![crate_type = "lib"]
+#![feature(core_intrinsics)]
+
+use std::intrinsics::{likely,unlikely};
+
+#[no_mangle]
+pub fn check_likely(x: i32, y: i32) -> Option<i32> {
+ unsafe {
+ // CHECK: call i1 @llvm.expect.i1(i1 %{{.*}}, i1 true)
+ if likely(x == y) {
+ None
+ } else {
+ Some(x + y)
+ }
+ }
+}
+
+#[no_mangle]
+pub fn check_unlikely(x: i32, y: i32) -> Option<i32> {
+ unsafe {
+ // CHECK: call i1 @llvm.expect.i1(i1 %{{.*}}, i1 false)
+ if unlikely(x == y) {
+ None
+ } else {
+ Some(x + y)
+ }
+ }
+}