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//@ test-mir-pass: UnreachablePropagation
// EMIT_MIR_FOR_EACH_PANIC_STRATEGY
enum Empty {}
fn empty() -> Option<Empty> {
None
}
// EMIT_MIR unreachable.if_let.UnreachablePropagation.diff
fn if_let() {
// CHECK-LABEL: fn if_let(
// CHECK: bb0: {
// CHECK: {{_.*}} = empty()
// CHECK: bb1: {
// CHECK: [[ne:_.*]] = Ne({{.*}}, const 1_isize);
// CHECK-NEXT: assume(move [[ne]]);
// CHECK-NEXT: goto -> bb6;
// CHECK: bb2: {
// CHECK-NEXT: unreachable;
// CHECK: bb3: {
// CHECK-NEXT: unreachable;
// CHECK: bb4: {
// CHECK-NEXT: unreachable;
// CHECK: bb5: {
// CHECK-NEXT: unreachable;
// CHECK: bb6: {
// CHECK: return;
if let Some(_x) = empty() {
let mut _y;
if true {
_y = 21;
} else {
_y = 42;
}
match _x {}
}
}
// EMIT_MIR unreachable.as_match.UnreachablePropagation.diff
fn as_match() {
// CHECK-LABEL: fn as_match(
// CHECK: bb0: {
// CHECK: {{_.*}} = empty()
// CHECK: bb1: {
// CHECK: [[eq:_.*]] = Ne({{.*}}, const 1_isize);
// CHECK-NEXT: assume(move [[eq]]);
// CHECK-NEXT: goto -> bb2;
// CHECK: bb2: {
// CHECK: return;
// CHECK: bb3: {
// CHECK-NEXT: unreachable;
match empty() {
Some(_x) => match _x {},
None => {}
}
}
fn main() {
if_let();
as_match();
}
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