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Diffstat (limited to '')
-rw-r--r-- | src/test/codegen/slice-windows-no-bounds-check.rs | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/src/test/codegen/slice-windows-no-bounds-check.rs b/src/test/codegen/slice-windows-no-bounds-check.rs new file mode 100644 index 000000000..4f5f4425c --- /dev/null +++ b/src/test/codegen/slice-windows-no-bounds-check.rs @@ -0,0 +1,35 @@ +#![crate_type = "lib"] + +// compile-flags: -O + +use std::slice::Windows; + +// CHECK-LABEL: @naive_string_search +#[no_mangle] +pub fn naive_string_search(haystack: &str, needle: &str) -> Option<usize> { + if needle.is_empty() { + return Some(0); + } + // CHECK-NOT: panic + // CHECK-NOT: fail + haystack + .as_bytes() + .windows(needle.len()) + .position(|sub| sub == needle.as_bytes()) +} + +// CHECK-LABEL: @next +#[no_mangle] +pub fn next<'a>(w: &mut Windows<'a, u32>) -> Option<&'a [u32]> { + // CHECK-NOT: panic + // CHECK-NOT: fail + w.next() +} + +// CHECK-LABEL: @next_back +#[no_mangle] +pub fn next_back<'a>(w: &mut Windows<'a, u32>) -> Option<&'a [u32]> { + // CHECK-NOT: panic + // CHECK-NOT: fail + w.next_back() +} |