16 lines
473 B
Rust
16 lines
473 B
Rust
// compile-flags: -C opt-level=3
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#![crate_type = "lib"]
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// #71602: check that slice equality just generates a single bcmp
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// CHECK-LABEL: @is_zero_slice
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#[no_mangle]
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pub fn is_zero_slice(data: &[u8; 4]) -> bool {
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// CHECK: start:
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// CHECK-NEXT: %{{.+}} = getelementptr {{.+}}
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// CHECK-NEXT: %[[BCMP:.+]] = tail call i32 @{{bcmp|memcmp}}({{.+}})
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// CHECK-NEXT: %[[EQ:.+]] = icmp eq i32 %[[BCMP]], 0
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// CHECK-NEXT: ret i1 %[[EQ]]
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*data == [0; 4]
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}
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