rust/tests/codegen/issues/issue-112509-slice-get-andthen-get.rs

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//@ compile-flags: -O
#![crate_type = "lib"]
// CHECK-LABEL: @write_u8_variant_a
// CHECK-NEXT: {{.*}}:
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// CHECK-NEXT: icmp ugt
// CHECK-NEXT: getelementptr
// CHECK-NEXT: select i1 {{.+}} null
// CHECK-NEXT: insertvalue
// CHECK-NEXT: insertvalue
// CHECK-NEXT: ret
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#[no_mangle]
pub fn write_u8_variant_a(bytes: &mut [u8], buf: u8, offset: usize) -> Option<&mut [u8]> {
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let buf = buf.to_le_bytes();
bytes.get_mut(offset..).and_then(|bytes| bytes.get_mut(..buf.len()))
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}