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granite-rust/src/test/mir-opt/lower_intrinsics.forget.LowerIntrinsics.diff

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Lower intrinsics calls: forget, size_of, unreachable, wrapping_* This allows constant propagation to evaluate `size_of` and `wrapping_*`, and unreachable propagation to propagate a call to `unreachable`. The lowering is performed as a MIR optimization, rather than during MIR building to preserve the special status of intrinsics with respect to unsafety checks and promotion.
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- // MIR for `forget` before LowerIntrinsics
+ // MIR for `forget` after LowerIntrinsics
fn forget(_1: T) -> () {
debug t => _1; // in scope 0 at $DIR/lower_intrinsics.rs:18:18: 18:19
let mut _0: (); // return place in scope 0 at $DIR/lower_intrinsics.rs:18:24: 18:24
Make forget intrinsic safe
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let mut _2: T; // in scope 0 at $DIR/lower_intrinsics.rs:19:30: 19:31
Lower intrinsics calls: forget, size_of, unreachable, wrapping_* This allows constant propagation to evaluate `size_of` and `wrapping_*`, and unreachable propagation to propagate a call to `unreachable`. The lowering is performed as a MIR optimization, rather than during MIR building to preserve the special status of intrinsics with respect to unsafety checks and promotion.
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bb0: {
Make forget intrinsic safe
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StorageLive(_2); // scope 0 at $DIR/lower_intrinsics.rs:19:30: 19:31
_2 = move _1; // scope 0 at $DIR/lower_intrinsics.rs:19:30: 19:31
- _0 = std::intrinsics::forget::<T>(move _2) -> bb1; // scope 0 at $DIR/lower_intrinsics.rs:19:5: 19:32
Lower intrinsics calls: forget, size_of, unreachable, wrapping_* This allows constant propagation to evaluate `size_of` and `wrapping_*`, and unreachable propagation to propagate a call to `unreachable`. The lowering is performed as a MIR optimization, rather than during MIR building to preserve the special status of intrinsics with respect to unsafety checks and promotion.
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- // mir::Constant
Make forget intrinsic safe
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- // + span: $DIR/lower_intrinsics.rs:19:5: 19:29
- // + literal: Const { ty: extern "rust-intrinsic" fn(T) {std::intrinsics::forget::<T>}, val: Value(Scalar(<ZST>)) }
+ _0 = const (); // scope 0 at $DIR/lower_intrinsics.rs:19:5: 19:32
+ goto -> bb1; // scope 0 at $DIR/lower_intrinsics.rs:19:5: 19:32
Lower intrinsics calls: forget, size_of, unreachable, wrapping_* This allows constant propagation to evaluate `size_of` and `wrapping_*`, and unreachable propagation to propagate a call to `unreachable`. The lowering is performed as a MIR optimization, rather than during MIR building to preserve the special status of intrinsics with respect to unsafety checks and promotion.
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}
bb1: {
Make forget intrinsic safe
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StorageDead(_2); // scope 0 at $DIR/lower_intrinsics.rs:19:31: 19:32
Always run intrinsics lowering pass Move intrinsics lowering pass from the optimization phase (where it would not run if -Zmir-opt-level=0), to the drop lowering phase where it runs unconditionally. The implementation of those intrinsics in code generation and interpreter is unnecessary. Remove it.
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goto -> bb2; // scope 0 at $DIR/lower_intrinsics.rs:20:1: 20:2
}
bb2: {
Lower intrinsics calls: forget, size_of, unreachable, wrapping_* This allows constant propagation to evaluate `size_of` and `wrapping_*`, and unreachable propagation to propagate a call to `unreachable`. The lowering is performed as a MIR optimization, rather than during MIR building to preserve the special status of intrinsics with respect to unsafety checks and promotion.
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return; // scope 0 at $DIR/lower_intrinsics.rs:20:2: 20:2
}
Always run intrinsics lowering pass Move intrinsics lowering pass from the optimization phase (where it would not run if -Zmir-opt-level=0), to the drop lowering phase where it runs unconditionally. The implementation of those intrinsics in code generation and interpreter is unnecessary. Remove it.
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bb3 (cleanup): {
resume; // scope 0 at $DIR/lower_intrinsics.rs:18:1: 20:2
}
Lower intrinsics calls: forget, size_of, unreachable, wrapping_* This allows constant propagation to evaluate `size_of` and `wrapping_*`, and unreachable propagation to propagate a call to `unreachable`. The lowering is performed as a MIR optimization, rather than during MIR building to preserve the special status of intrinsics with respect to unsafety checks and promotion.
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}
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