| //@ only-x86_64 |
| //@ compile-flags: -C opt-level=3 |
| #![crate_type = "lib"] |
| #![no_std] |
| #![feature(str_internals)] |
| |
| extern crate alloc; |
| |
| /// Ensure that the ascii-prefix loop for `str::to_lowercase` and `str::to_uppercase` uses vector |
| /// instructions. |
| /// |
| /// The llvm ir should be the same for all targets that support some form of simd. Only targets |
| /// without any simd instructions would see scalarized ir. |
| /// Unfortunately, there is no `only-simd` directive to only run this test on only such platforms, |
| /// and using test revisions would still require the core libraries for all platforms. |
| // CHECK-LABEL: @lower_while_ascii |
| // CHECK: [[A:%[0-9]]] = load <16 x i8> |
| // CHECK-NEXT: [[B:%[0-9]]] = icmp slt <16 x i8> [[A]], zeroinitializer |
| // CHECK-NEXT: [[C:%[0-9]]] = bitcast <16 x i1> [[B]] to i16 |
| #[no_mangle] |
| pub fn lower_while_ascii(s: &str) -> (alloc::string::String, &str) { |
| alloc::str::convert_while_ascii(s, u8::to_ascii_lowercase) |
| } |
