mirror of
https://github.com/rust-lang/rust.git
synced 2025-04-29 11:37:39 +00:00
52 lines
1.4 KiB
Rust
52 lines
1.4 KiB
Rust
|
//@ compile-flags: -Copt-level=3 -C no-prepopulate-passes
|
||
|
|
//@ min-llvm-version: 19 (for trunc nuw)
|
||
|
|
//@ only-x86_64 (because these discriminants are isize)
|
||
|
|
|
||
|
|
#![crate_type = "lib"]
|
||
|
|
|
||
|
|
// CHECK-LABEL: @option_match
|
||
|
|
#[no_mangle]
|
||
|
|
pub fn option_match(x: Option<i32>) -> u16 {
|
||
|
|
// CHECK: %x = alloca [8 x i8]
|
||
|
|
// CHECK: store i32 %0, ptr %x
|
||
|
|
// CHECK: %[[TAG:.+]] = load i32, ptr %x
|
||
|
|
// CHECK-SAME: !range ![[ZERO_ONE_32:[0-9]+]]
|
||
|
|
// CHECK: %[[DISCR:.+]] = zext i32 %[[TAG]] to i64
|
||
|
|
// CHECK: %[[COND:.+]] = trunc nuw i64 %[[DISCR]] to i1
|
||
|
|
// CHECK: br i1 %[[COND]], label %[[TRUE:[a-z0-9]+]], label %[[FALSE:[a-z0-9]+]]
|
||
|
|
|
||
|
|
// CHECK: [[TRUE]]:
|
||
|
|
// CHECK: store i16 13
|
||
|
|
|
||
|
|
// CHECK: [[FALSE]]:
|
||
|
|
// CHECK: store i16 42
|
||
|
|
match x {
|
||
|
|
Some(_) => 13,
|
||
|
|
None => 42,
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// CHECK-LABEL: @result_match
|
||
|
|
#[no_mangle]
|
||
|
|
pub fn result_match(x: Result<u64, i64>) -> u16 {
|
||
|
|
// CHECK: %x = alloca [16 x i8]
|
||
|
|
// CHECK: store i64 %0, ptr %x
|
||
|
|
// CHECK: %[[DISCR:.+]] = load i64, ptr %x
|
||
|
|
// CHECK-SAME: !range ![[ZERO_ONE_64:[0-9]+]]
|
||
|
|
// CHECK: %[[COND:.+]] = trunc nuw i64 %[[DISCR]] to i1
|
||
|
|
// CHECK: br i1 %[[COND]], label %[[TRUE:[a-z0-9]+]], label %[[FALSE:[a-z0-9]+]]
|
||
|
|
|
||
|
|
// CHECK: [[TRUE]]:
|
||
|
|
// CHECK: store i16 13
|
||
|
|
|
||
|
|
// CHECK: [[FALSE]]:
|
||
|
|
// CHECK: store i16 42
|
||
|
|
match x {
|
||
|
|
Err(_) => 13,
|
||
|
|
Ok(_) => 42,
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// CHECK: ![[ZERO_ONE_32]] = !{i32 0, i32 2}
|
||
|
|
// CHECK: ![[ZERO_ONE_64]] = !{i64 0, i64 2}
|