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)`
43 lines
832 B
Rust
43 lines
832 B
Rust
// skip-filecheck
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// EMIT_MIR_FOR_EACH_PANIC_STRATEGY
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// unit-test: DeadStoreElimination
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// compile-flags: -Zmir-enable-passes=+CopyProp
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#![feature(core_intrinsics)]
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#![feature(custom_mir)]
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#![allow(internal_features)]
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use std::intrinsics::mir::*;
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#[inline(never)]
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fn use_both(_: i32, _: i32) {}
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// EMIT_MIR call_arg_copy.move_simple.DeadStoreElimination.diff
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fn move_simple(x: i32) {
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use_both(x, x);
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}
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#[repr(packed)]
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struct Packed {
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x: u8,
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y: i32,
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}
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// EMIT_MIR call_arg_copy.move_packed.DeadStoreElimination.diff
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#[custom_mir(dialect = "analysis")]
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fn move_packed(packed: Packed) {
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mir!(
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{
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Call(RET = use_both(0, packed.y), ret, UnwindContinue())
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}
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ret = {
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Return()
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}
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)
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}
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fn main() {
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move_simple(1);
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move_packed(Packed { x: 0, y: 1 });
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}
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