From a4b7ed7a42c716ab9f05e351f003d589124fd55d Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Wed, 17 Apr 2024 14:18:58 +0200 Subject: Adding upstream version 1.68.2+dfsg1. Signed-off-by: Daniel Baumann --- .../issue-73396-bounds-check-after-position.rs | 77 ++++++++++++++++++++++ 1 file changed, 77 insertions(+) create mode 100644 tests/codegen/issue-73396-bounds-check-after-position.rs (limited to 'tests/codegen/issue-73396-bounds-check-after-position.rs') 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 + } +} -- cgit v1.2.3