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Add test.

This commit is contained in:
Camille GILLOT 2023-05-10 16:06:41 +00:00
parent cba14074bb
commit b64e9113e2
3 changed files with 168 additions and 0 deletions
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75
tests/mir-opt/reference_prop.mut_raw_then_mut_shr.ReferencePropagation.diff Normal file
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@ -0,0 +1,75 @@
- // MIR for `mut_raw_then_mut_shr` before ReferencePropagation
+ // MIR for `mut_raw_then_mut_shr` after ReferencePropagation
fn mut_raw_then_mut_shr() -> (i32, i32) {
let mut _0: (i32, i32); // return place in scope 0 at $DIR/reference_prop.rs:+0:30: +0:40
let mut _1: i32; // in scope 0 at $DIR/reference_prop.rs:+1:9: +1:14
let mut _4: *mut i32; // in scope 0 at $DIR/reference_prop.rs:+3:16: +3:36
let mut _5: &mut i32; // in scope 0 at $DIR/reference_prop.rs:+3:16: +3:26
let _8: (); // in scope 0 at $DIR/reference_prop.rs:+7:5: +7:26
let mut _9: i32; // in scope 0 at $DIR/reference_prop.rs:+8:6: +8:7
let mut _10: i32; // in scope 0 at $DIR/reference_prop.rs:+8:9: +8:10
scope 1 {
debug x => _1; // in scope 1 at $DIR/reference_prop.rs:+1:9: +1:14
let _2: &mut i32; // in scope 1 at $DIR/reference_prop.rs:+2:9: +2:13
scope 2 {
debug xref => _2; // in scope 2 at $DIR/reference_prop.rs:+2:9: +2:13
let _3: *mut i32; // in scope 2 at $DIR/reference_prop.rs:+3:9: +3:13
scope 3 {
debug xraw => _3; // in scope 3 at $DIR/reference_prop.rs:+3:9: +3:13
let _6: &i32; // in scope 3 at $DIR/reference_prop.rs:+4:9: +4:13
scope 4 {
debug xshr => _6; // in scope 4 at $DIR/reference_prop.rs:+4:9: +4:13
let _7: i32; // in scope 4 at $DIR/reference_prop.rs:+6:9: +6:10
scope 5 {
debug a => _7; // in scope 5 at $DIR/reference_prop.rs:+6:9: +6:10
scope 6 {
}
}
}
}
}
}
bb0: {
StorageLive(_1); // scope 0 at $DIR/reference_prop.rs:+1:9: +1:14
_1 = const 2_i32; // scope 0 at $DIR/reference_prop.rs:+1:17: +1:18
- StorageLive(_2); // scope 1 at $DIR/reference_prop.rs:+2:9: +2:13
_2 = &mut _1; // scope 1 at $DIR/reference_prop.rs:+2:16: +2:22
StorageLive(_3); // scope 2 at $DIR/reference_prop.rs:+3:9: +3:13
StorageLive(_4); // scope 2 at $DIR/reference_prop.rs:+3:16: +3:36
- StorageLive(_5); // scope 2 at $DIR/reference_prop.rs:+3:16: +3:26
- _5 = &mut (*_2); // scope 2 at $DIR/reference_prop.rs:+3:16: +3:26
- _4 = &raw mut (*_5); // scope 2 at $DIR/reference_prop.rs:+3:16: +3:26
+ _5 = &mut _1; // scope 2 at $DIR/reference_prop.rs:+3:16: +3:26
+ _4 = &raw mut (*_2); // scope 2 at $DIR/reference_prop.rs:+3:16: +3:26
_3 = _4; // scope 2 at $DIR/reference_prop.rs:+3:16: +3:36
- StorageDead(_5); // scope 2 at $DIR/reference_prop.rs:+3:36: +3:37
StorageDead(_4); // scope 2 at $DIR/reference_prop.rs:+3:36: +3:37
StorageLive(_6); // scope 3 at $DIR/reference_prop.rs:+4:9: +4:13
- _6 = &(*_2); // scope 3 at $DIR/reference_prop.rs:+4:16: +4:22
+ _6 = &_1; // scope 3 at $DIR/reference_prop.rs:+4:16: +4:22
StorageLive(_7); // scope 4 at $DIR/reference_prop.rs:+6:9: +6:10
- _7 = (*_6); // scope 4 at $DIR/reference_prop.rs:+6:13: +6:18
- StorageLive(_8); // scope 5 at $DIR/reference_prop.rs:+7:5: +7:26
- (*_3) = const 4_i32; // scope 6 at $DIR/reference_prop.rs:+7:14: +7:23
- _8 = const (); // scope 6 at $DIR/reference_prop.rs:+7:5: +7:26
- StorageDead(_8); // scope 5 at $DIR/reference_prop.rs:+7:25: +7:26
+ _7 = (*_2); // scope 4 at $DIR/reference_prop.rs:+6:13: +6:18
+ (*_5) = const 4_i32; // scope 6 at $DIR/reference_prop.rs:+7:14: +7:23
StorageLive(_9); // scope 5 at $DIR/reference_prop.rs:+8:6: +8:7
_9 = _7; // scope 5 at $DIR/reference_prop.rs:+8:6: +8:7
StorageLive(_10); // scope 5 at $DIR/reference_prop.rs:+8:9: +8:10
_10 = _1; // scope 5 at $DIR/reference_prop.rs:+8:9: +8:10
_0 = (move _9, move _10); // scope 5 at $DIR/reference_prop.rs:+8:5: +8:11
StorageDead(_10); // scope 5 at $DIR/reference_prop.rs:+8:10: +8:11
StorageDead(_9); // scope 5 at $DIR/reference_prop.rs:+8:10: +8:11
StorageDead(_7); // scope 4 at $DIR/reference_prop.rs:+9:1: +9:2
StorageDead(_6); // scope 3 at $DIR/reference_prop.rs:+9:1: +9:2
StorageDead(_3); // scope 2 at $DIR/reference_prop.rs:+9:1: +9:2
- StorageDead(_2); // scope 1 at $DIR/reference_prop.rs:+9:1: +9:2
StorageDead(_1); // scope 0 at $DIR/reference_prop.rs:+9:1: +9:2
return; // scope 0 at $DIR/reference_prop.rs:+9:2: +9:2
}
}

27
tests/mir-opt/reference_prop.rs
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@ -433,6 +433,29 @@ fn maybe_dead(m: bool) {
)
}
fn mut_raw_then_mut_shr() -> (i32, i32) {
let mut x = 2;
let xref = &mut x;
let xraw = &mut *xref as *mut _;
let xshr = &*xref;
// Verify that we completely replace with `x` in both cases.
let a = *xshr;
unsafe { *xraw = 4; }
(a, x)
}
fn unique_with_copies() {
let y = {
let mut a = 0;
let x = &raw mut a;
// `*y` is not replacable below, so we must not replace `*x`.
unsafe { opaque(*x) };
x
};
// But rewriting as `*x` is ok.
unsafe { opaque(*y) };
}
fn main() {
let mut x = 5_usize;
let mut y = 7_usize;
@ -444,6 +467,8 @@ fn main() {
multiple_storage();
dominate_storage();
maybe_dead(true);
mut_raw_then_mut_shr();
unique_with_copies();
}
// EMIT_MIR reference_prop.reference_propagation.ReferencePropagation.diff
@ -454,3 +479,5 @@ fn main() {
// EMIT_MIR reference_prop.multiple_storage.ReferencePropagation.diff
// EMIT_MIR reference_prop.dominate_storage.ReferencePropagation.diff
// EMIT_MIR reference_prop.maybe_dead.ReferencePropagation.diff
// EMIT_MIR reference_prop.mut_raw_then_mut_shr.ReferencePropagation.diff
// EMIT_MIR reference_prop.unique_with_copies.ReferencePropagation.diff

66
tests/mir-opt/reference_prop.unique_with_copies.ReferencePropagation.diff Normal file
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@ -0,0 +1,66 @@
- // MIR for `unique_with_copies` before ReferencePropagation
+ // MIR for `unique_with_copies` after ReferencePropagation
fn unique_with_copies() -> () {
let mut _0: (); // return place in scope 0 at $DIR/reference_prop.rs:+0:25: +0:25
let _1: *mut i32; // in scope 0 at $DIR/reference_prop.rs:+1:9: +1:10
let mut _2: i32; // in scope 0 at $DIR/reference_prop.rs:+2:13: +2:18
let _4: (); // in scope 0 at $DIR/reference_prop.rs:+5:18: +5:28
let mut _5: i32; // in scope 0 at $DIR/reference_prop.rs:+5:25: +5:27
let _6: (); // in scope 0 at $DIR/reference_prop.rs:+9:14: +9:24
let mut _7: i32; // in scope 0 at $DIR/reference_prop.rs:+9:21: +9:23
scope 1 {
debug y => _1; // in scope 1 at $DIR/reference_prop.rs:+1:9: +1:10
scope 5 {
}
}
scope 2 {
debug a => _2; // in scope 2 at $DIR/reference_prop.rs:+2:13: +2:18
let _3: *mut i32; // in scope 2 at $DIR/reference_prop.rs:+3:13: +3:14
scope 3 {
debug x => _3; // in scope 3 at $DIR/reference_prop.rs:+3:13: +3:14
scope 4 {
}
}
}
bb0: {
StorageLive(_1); // scope 0 at $DIR/reference_prop.rs:+1:9: +1:10
StorageLive(_2); // scope 0 at $DIR/reference_prop.rs:+2:13: +2:18
_2 = const 0_i32; // scope 0 at $DIR/reference_prop.rs:+2:21: +2:22
StorageLive(_3); // scope 2 at $DIR/reference_prop.rs:+3:13: +3:14
_3 = &raw mut _2; // scope 2 at $DIR/reference_prop.rs:+3:17: +3:27
StorageLive(_4); // scope 3 at $DIR/reference_prop.rs:+5:9: +5:30
StorageLive(_5); // scope 4 at $DIR/reference_prop.rs:+5:25: +5:27
- _5 = (*_3); // scope 4 at $DIR/reference_prop.rs:+5:25: +5:27
+ _5 = _2; // scope 4 at $DIR/reference_prop.rs:+5:25: +5:27
_4 = opaque::<i32>(move _5) -> bb1; // scope 4 at $DIR/reference_prop.rs:+5:18: +5:28
// mir::Constant
// + span: $DIR/reference_prop.rs:452:18: 452:24
// + literal: Const { ty: fn(i32) {opaque::<i32>}, val: Value(<ZST>) }
}
bb1: {
StorageDead(_5); // scope 4 at $DIR/reference_prop.rs:+5:27: +5:28
StorageDead(_4); // scope 3 at $DIR/reference_prop.rs:+5:30: +5:31
_1 = _3; // scope 3 at $DIR/reference_prop.rs:+6:9: +6:10
StorageDead(_3); // scope 2 at $DIR/reference_prop.rs:+7:5: +7:6
StorageDead(_2); // scope 0 at $DIR/reference_prop.rs:+7:5: +7:6
StorageLive(_6); // scope 1 at $DIR/reference_prop.rs:+9:5: +9:26
StorageLive(_7); // scope 5 at $DIR/reference_prop.rs:+9:21: +9:23
_7 = (*_1); // scope 5 at $DIR/reference_prop.rs:+9:21: +9:23
_6 = opaque::<i32>(move _7) -> bb2; // scope 5 at $DIR/reference_prop.rs:+9:14: +9:24
// mir::Constant
// + span: $DIR/reference_prop.rs:456:14: 456:20
// + literal: Const { ty: fn(i32) {opaque::<i32>}, val: Value(<ZST>) }
}
bb2: {
StorageDead(_7); // scope 5 at $DIR/reference_prop.rs:+9:23: +9:24
StorageDead(_6); // scope 1 at $DIR/reference_prop.rs:+9:26: +9:27
_0 = const (); // scope 0 at $DIR/reference_prop.rs:+0:25: +10:2
StorageDead(_1); // scope 0 at $DIR/reference_prop.rs:+10:1: +10:2
return; // scope 0 at $DIR/reference_prop.rs:+10:2: +10:2
}
}