45 lines
691 B
Rust
45 lines
691 B
Rust
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//! This test checks that match branches which all access a field
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//! at the same offset are merged together.
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//!
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//@ compile-flags: -O
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#![crate_type = "lib"]
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#[repr(C)]
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pub struct A {
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x: f64,
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y: u64,
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}
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#[repr(C)]
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pub struct B {
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x: f64,
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y: u32,
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}
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#[repr(C)]
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pub struct C {
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x: f64,
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y: u16,
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}
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#[repr(C)]
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pub struct D {
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x: f64,
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y: u8,
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}
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pub enum E {
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A(A),
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B(B),
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C(C),
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D(D),
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}
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// CHECK-LABEL: @match_on_e
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#[no_mangle]
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pub fn match_on_e(e: &E) -> &f64 {
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// CHECK: start:
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// CHECK-NEXT: getelementptr
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// CHECK-NEXT: ret
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match e {
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E::A(A { x, .. }) | E::B(B { x, .. }) | E::C(C { x, .. }) | E::D(D { x, .. }) => x,
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}
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}
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