diff options
author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:19:03 +0000 |
---|---|---|
committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:19:03 +0000 |
commit | 64d98f8ee037282c35007b64c2649055c56af1db (patch) | |
tree | 5492bcf97fce41ee1c0b1cc2add283f3e66cdab0 /tests/codegen/issue-73396-bounds-check-after-position.rs | |
parent | Adding debian version 1.67.1+dfsg1-1. (diff) | |
download | rustc-64d98f8ee037282c35007b64c2649055c56af1db.tar.xz rustc-64d98f8ee037282c35007b64c2649055c56af1db.zip |
Merging upstream version 1.68.2+dfsg1.
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'tests/codegen/issue-73396-bounds-check-after-position.rs')
-rw-r--r-- | tests/codegen/issue-73396-bounds-check-after-position.rs | 77 |
1 files changed, 77 insertions, 0 deletions
diff --git a/tests/codegen/issue-73396-bounds-check-after-position.rs b/tests/codegen/issue-73396-bounds-check-after-position.rs new file mode 100644 index 000000000..8d07a67a1 --- /dev/null +++ b/tests/codegen/issue-73396-bounds-check-after-position.rs @@ -0,0 +1,77 @@ +// compile-flags: -O +// ignore-debug: the debug assertions get in the way +#![crate_type = "lib"] + +// Make sure no bounds checks are emitted when slicing or indexing +// with an index from `position()` or `rposition()`. + +// CHECK-LABEL: @position_slice_to_no_bounds_check +#[no_mangle] +pub fn position_slice_to_no_bounds_check(s: &[u8]) -> &[u8] { + // CHECK-NOT: panic + // CHECK-NOT: slice_index_len_fail + if let Some(idx) = s.iter().position(|b| *b == b'\\') { + &s[..idx] + } else { + s + } +} + +// CHECK-LABEL: @position_slice_from_no_bounds_check +#[no_mangle] +pub fn position_slice_from_no_bounds_check(s: &[u8]) -> &[u8] { + // CHECK-NOT: panic + // CHECK-NOT: slice_index_len_fail + if let Some(idx) = s.iter().position(|b| *b == b'\\') { + &s[idx..] + } else { + s + } +} + +// CHECK-LABEL: @position_index_no_bounds_check +#[no_mangle] +pub fn position_index_no_bounds_check(s: &[u8]) -> u8 { + // CHECK-NOT: panic + // CHECK-NOT: slice_index_len_fail + if let Some(idx) = s.iter().position(|b| *b == b'\\') { + s[idx] + } else { + 42 + } +} +// CHECK-LABEL: @rposition_slice_to_no_bounds_check +#[no_mangle] +pub fn rposition_slice_to_no_bounds_check(s: &[u8]) -> &[u8] { + // CHECK-NOT: panic + // CHECK-NOT: slice_index_len_fail + if let Some(idx) = s.iter().rposition(|b| *b == b'\\') { + &s[..idx] + } else { + s + } +} + +// CHECK-LABEL: @rposition_slice_from_no_bounds_check +#[no_mangle] +pub fn rposition_slice_from_no_bounds_check(s: &[u8]) -> &[u8] { + // CHECK-NOT: panic + // CHECK-NOT: slice_index_len_fail + if let Some(idx) = s.iter().rposition(|b| *b == b'\\') { + &s[idx..] + } else { + s + } +} + +// CHECK-LABEL: @rposition_index_no_bounds_check +#[no_mangle] +pub fn rposition_index_no_bounds_check(s: &[u8]) -> u8 { + // CHECK-NOT: panic + // CHECK-NOT: slice_index_len_fail + if let Some(idx) = s.iter().rposition(|b| *b == b'\\') { + s[idx] + } else { + 42 + } +} |