| //@ only-x86_64 | |
| //@ compile-flags: -C opt-level=3 -C target-cpu=x86-64 | |
| #![crate_type = "lib"] | |
| /// Check that the fast-path of `is_ascii` uses a `pmovmskb` instruction. | |
| /// Platforms lacking an equivalent instruction use other techniques for | |
| /// optimizing `is_ascii`. | |
| // CHECK-LABEL: @is_ascii_autovectorized | |
| #[no_mangle] | |
| pub fn is_ascii_autovectorized(s: &[u8]) -> bool { | |
| // CHECK: load <32 x i8> | |
| // CHECK-NEXT: icmp slt <32 x i8> | |
| // CHECK-NEXT: bitcast <32 x i1> | |
| // CHECK-NEXT: icmp eq i32 | |
| s.is_ascii() | |
| } |