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//@ compile-flags: -Copt-level=3 -Zmerge-functions=disabled
#![feature(core_intrinsics)]
#![crate_type = "lib"]
/* Test the intrinsic */
#[no_mangle]
pub fn test_int(p: bool, a: u64, b: u64) -> u64 {
// CHECK-LABEL: define{{.*}} @test_int
// CHECK: select i1 %p, i64 %a, i64 %b, !unpredictable
core::intrinsics::select_unpredictable(p, a, b)
}
#[no_mangle]
pub fn test_pair(p: bool, a: (u64, u64), b: (u64, u64)) -> (u64, u64) {
// CHECK-LABEL: define{{.*}} @test_pair
// CHECK: select i1 %p, {{.*}}, !unpredictable
core::intrinsics::select_unpredictable(p, a, b)
}
struct Large {
e: [u64; 100],
}
#[no_mangle]
pub fn test_struct(p: bool, a: Large, b: Large) -> Large {
// CHECK-LABEL: define{{.*}} @test_struct
// CHECK: select i1 %p, {{.*}}, !unpredictable
core::intrinsics::select_unpredictable(p, a, b)
}
// ZSTs should not need a `select` expression.
#[no_mangle]
pub fn test_zst(p: bool, a: (), b: ()) -> () {
// CHECK-LABEL: define{{.*}} @test_zst
// CHECK-NEXT: start:
// CHECK-NEXT: ret void
core::intrinsics::select_unpredictable(p, a, b)
}
/* Test the user-facing version */
#[no_mangle]
pub fn test_int2(p: bool, a: u64, b: u64) -> u64 {
// CHECK-LABEL: define{{.*}} @test_int2
// CHECK: select i1 %p, i64 %a, i64 %b, !unpredictable
core::hint::select_unpredictable(p, a, b)
}
#[no_mangle]
pub fn test_pair2(p: bool, a: (u64, u64), b: (u64, u64)) -> (u64, u64) {
// CHECK-LABEL: define{{.*}} @test_pair2
// CHECK: select i1 %p, {{.*}}, !unpredictable
core::hint::select_unpredictable(p, a, b)
}
#[no_mangle]
pub fn test_struct2(p: bool, a: Large, b: Large) -> Large {
// CHECK-LABEL: define{{.*}} @test_struct2
// CHECK: select i1 %p, {{.*}}, !unpredictable
core::hint::select_unpredictable(p, a, b)
}
#[no_mangle]
pub fn test_zst2(p: bool, a: (), b: ()) -> () {
// CHECK-LABEL: define{{.*}} @test_zst2
// CHECK-NEXT: start:
// CHECK-NEXT: ret void
core::hint::select_unpredictable(p, a, b)
}
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