mirror of
https://github.com/rust-lang/rust.git
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61 lines
2.3 KiB
Rust
61 lines
2.3 KiB
Rust
//@ compile-flags: -O -C debuginfo=0 -Zmir-opt-level=2 -Z ub-checks=yes
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// EMIT_MIR_FOR_EACH_PANIC_STRATEGY
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#![crate_type = "lib"]
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#![feature(slice_ptr_get)]
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use std::ops::Range;
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// EMIT_MIR slice_index.slice_index_usize.PreCodegen.after.mir
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pub fn slice_index_usize(slice: &[u32], index: usize) -> u32 {
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// CHECK-LABEL: slice_index_usize
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// CHECK: [[LEN:_[0-9]+]] = Len((*_1))
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// CHECK: Lt(copy _2, copy [[LEN]])
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// CHECK-NOT: precondition_check
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// CHECK: _0 = copy (*_1)[_2];
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slice[index]
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}
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// EMIT_MIR slice_index.slice_get_mut_usize.PreCodegen.after.mir
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pub fn slice_get_mut_usize(slice: &mut [u32], index: usize) -> Option<&mut u32> {
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// CHECK-LABEL: slice_get_mut_usize
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// CHECK: [[LEN:_[0-9]+]] = PtrMetadata(copy _1)
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// CHECK: Lt(copy _2, move [[LEN]])
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// CHECK-NOT: precondition_check
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slice.get_mut(index)
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}
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// EMIT_MIR slice_index.slice_index_range.PreCodegen.after.mir
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pub fn slice_index_range(slice: &[u32], index: Range<usize>) -> &[u32] {
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// CHECK-LABEL: slice_index_range
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&slice[index]
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}
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// EMIT_MIR slice_index.slice_get_unchecked_mut_range.PreCodegen.after.mir
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pub unsafe fn slice_get_unchecked_mut_range(slice: &mut [u32], index: Range<usize>) -> &mut [u32] {
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// CHECK-LABEL: slice_get_unchecked_mut_range
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// CHECK: [[START:_[0-9]+]] = move (_2.0: usize);
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// CHECK: [[END:_[0-9]+]] = move (_2.1: usize);
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// CHECK: precondition_check
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// CHECK: [[LEN:_[0-9]+]] = SubUnchecked(copy [[END]], copy [[START]]);
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// CHECK: [[PTR:_[0-9]+]] = Offset(copy {{_[0-9]+}}, copy [[START]]);
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// CHECK: [[SLICE:_[0-9]+]] = *mut [u32] from (copy [[PTR]], copy [[LEN]])
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// CHECK: _0 = &mut (*[[SLICE]]);
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slice.get_unchecked_mut(index)
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}
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// EMIT_MIR slice_index.slice_ptr_get_unchecked_range.PreCodegen.after.mir
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pub unsafe fn slice_ptr_get_unchecked_range(
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slice: *const [u32],
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index: Range<usize>,
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) -> *const [u32] {
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// CHECK-LABEL: slice_ptr_get_unchecked_range
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// CHECK: [[START:_[0-9]+]] = move (_2.0: usize);
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// CHECK: [[END:_[0-9]+]] = move (_2.1: usize);
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// CHECK: precondition_check
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// CHECK: [[LEN:_[0-9]+]] = SubUnchecked(copy [[END]], copy [[START]]);
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// CHECK: [[PTR:_[0-9]+]] = Offset(copy {{_[0-9]+}}, copy [[START]]);
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// CHECK: _0 = *const [u32] from (copy [[PTR]], copy [[LEN]])
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slice.get_unchecked(index)
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}
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