78da577650
Cleanup blocks are declared with `bb (cleanup) = { ... }`.
`Call` and `Drop` terminators take an additional argument describing the
unwind action, which is one of the following:
* `UnwindContinue()`
* `UnwindUnreachable()`
* `UnwindTerminate(reason)`, where reason is `ReasonAbi` or `ReasonInCleanup`
* `UnwindCleanup(block)`
Also support unwind resume and unwind terminate terminators:
* `UnwindResume()`
* `UnwindTerminate(reason)`
35 lines
714 B
Rust
35 lines
714 B
Rust
// compile-flags: --crate-type=lib
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// edition:2021
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#![feature(custom_mir, core_intrinsics)]
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use core::intrinsics::mir::*;
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// CHECK-LABEL: fn f()
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// CHECK: bb1 (cleanup): {
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// CHECK-NEXT: terminate(abi);
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#[custom_mir(dialect = "runtime", phase = "optimized")]
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pub fn f() {
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mir!(
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{
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Return()
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}
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bb1(cleanup) = {
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UnwindTerminate(ReasonAbi)
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}
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)
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}
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// CHECK-LABEL: fn g()
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// CHECK: bb1 (cleanup): {
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// CHECK-NEXT: terminate(cleanup);
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#[custom_mir(dialect = "runtime", phase = "optimized")]
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pub fn g() {
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mir!(
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{
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Return()
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}
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bb1(cleanup) = {
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UnwindTerminate(ReasonInCleanup)
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}
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)
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}
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