rust/tests/codegen/issues/issue-73338-effecient-cmp.rs

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// This test checks that comparison operation
// generated by #[derive(PartialOrd)]
// doesn't contain jumps for C enums
// compile-flags: -Copt-level=3
#![crate_type="lib"]
#[repr(u32)]
#[derive(Copy, Clone, Eq, PartialEq, PartialOrd)]
pub enum Foo {
Zero,
One,
Two,
}
#[no_mangle]
pub fn compare_less(a: Foo, b: Foo)->bool{
// CHECK-NOT: br {{.*}}
a < b
}
#[no_mangle]
pub fn compare_le(a: Foo, b: Foo)->bool{
// CHECK-NOT: br {{.*}}
a <= b
}
#[no_mangle]
pub fn compare_ge(a: Foo, b: Foo)->bool{
// CHECK-NOT: br {{.*}}
a >= b
}
#[no_mangle]
pub fn compare_greater(a: Foo, b: Foo)->bool{
// CHECK-NOT: br {{.*}}
a > b
}