mirror of https://github.com/rust-lang/rust.git
17 lines
480 B
Rust
17 lines
480 B
Rust
//@ compile-flags: -O
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#![crate_type = "lib"]
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// CHECK-LABEL: @write_u8_variant_a
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// CHECK-NEXT: {{.*}}:
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// CHECK-NEXT: icmp ugt
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// CHECK-NEXT: getelementptr
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// CHECK-NEXT: select i1 {{.+}} null
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// CHECK-NEXT: insertvalue
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// CHECK-NEXT: insertvalue
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// CHECK-NEXT: ret
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#[no_mangle]
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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();
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bytes.get_mut(offset..).and_then(|bytes| bytes.get_mut(..buf.len()))
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}
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