143f39362a
Today we're making LLVM do a bunch of extra work for every enum you match on, even trivial stuff like `Option<bool>`. Let's not.
41 lines
753 B
Rust
41 lines
753 B
Rust
//@ compile-flags: -Copt-level=3 -Zmerge-functions=disabled
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#![crate_type = "lib"]
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pub enum Three {
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A,
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B,
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C,
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}
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#[repr(u16)]
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pub enum Four {
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A,
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B,
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C,
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D,
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}
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#[no_mangle]
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pub fn three_valued(x: Three) -> Three {
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// CHECK-LABEL: i8 @three_valued(i8{{.+}}%x)
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// CHECK-NEXT: {{^.*:$}}
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// CHECK-NEXT: ret i8 %x
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match x {
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Three::A => Three::A,
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Three::B => Three::B,
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Three::C => Three::C,
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}
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}
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#[no_mangle]
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pub fn four_valued(x: Four) -> Four {
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// CHECK-LABEL: i16 @four_valued(i16{{.+}}%x)
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// CHECK-NEXT: {{^.*:$}}
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// CHECK-NEXT: ret i16 %x
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match x {
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Four::A => Four::A,
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Four::B => Four::B,
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Four::C => Four::C,
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Four::D => Four::D,
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}
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}
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