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Update unreachable_enum_default_branch.rs

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DianQK 2024-03-09 11:45:29 +08:00
parent a10d157f98
commit f8656ef6e9
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2 changed files with 43 additions and 24 deletions
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24
tests/codegen/enum/uninhabited_enum_default_branch.rs
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@ -1,24 +0,0 @@
//@ compile-flags: -O
#![crate_type = "lib"]
#[derive(Clone, Copy, PartialEq, Eq, PartialOrd, Ord)]
pub struct Int(u32);
const A: Int = Int(201);
const B: Int = Int(270);
const C: Int = Int(153);
// CHECK-LABEL: @foo(
// CHECK-SAME: [[TMP0:%.*]])
// CHECK-NEXT: start:
// CHECK-NEXT: [[TMP1:%.*]] = add i32 [[TMP0]], -201
// CHECK-NEXT: icmp ult i32 [[TMP1]], 70
// CHECK-NEXT: icmp eq i32 [[TMP0]], 153
// CHECK-NEXT: [[SPEC_SELECT:%.*]] = or i1
// CHECK-NEXT: ret i1 [[SPEC_SELECT]]
#[no_mangle]
pub fn foo(x: Int) -> bool {
(x >= A && x <= B)
|| x == C
}

43
tests/codegen/enum/unreachable_enum_default_branch.rs Normal file
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@ -0,0 +1,43 @@
//@ compile-flags: -O
#![crate_type = "lib"]
#[derive(Clone, Copy, PartialEq, Eq, PartialOrd, Ord)]
pub struct Int(u32);
const A: Int = Int(201);
const B: Int = Int(270);
const C: Int = Int(153);
// The code is from https://github.com/rust-lang/rust/issues/119520.
// This code will basically turn into `matches!(x.partial_cmp(&A), Some(Greater | Equal))`.
// The otherwise branch must be `Less`.
// CHECK-LABEL: @implicit_match(
// CHECK-SAME: [[TMP0:%.*]])
// CHECK-NEXT: start:
// CHECK-NEXT: [[TMP1:%.*]] = add i32 [[TMP0]], -201
// CHECK-NEXT: icmp ult i32 [[TMP1]], 70
// CHECK-NEXT: icmp eq i32 [[TMP0]], 153
// CHECK-NEXT: [[SPEC_SELECT:%.*]] = or i1
// CHECK-NEXT: ret i1 [[SPEC_SELECT]]
#[no_mangle]
pub fn implicit_match(x: Int) -> bool {
(x >= A && x <= B)
|| x == C
}
// The code is from https://github.com/rust-lang/rust/issues/110097.
// We expect it to generate the same optimized code as a full match.
// CHECK-LABEL: @if_let(
// CHECK-NEXT: start:
// CHECK-NEXT: insertvalue
// CHECK-NEXT: insertvalue
// CHECK-NEXT: ret
#[no_mangle]
pub fn if_let(val: Result<i32, ()>) -> Result<i32, ()> {
if let Ok(x) = val {
Ok(x)
} else {
Err(())
}
}