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Extend SimplifyLocals to remove ZST writes

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This commit is contained in:
Simon Vandel Sillesen 2020-12-29 23:32:31 +01:00 committed by Erik Desjardins
parent e7e1dc158c
commit 4e901be57d
34 changed files with 40 additions and 40 deletions
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30
compiler/rustc_mir/src/transform/simplify.rs
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@ -333,7 +333,7 @@ pub fn simplify_locals<'tcx>(body: &mut Body<'tcx>, tcx: TyCtxt<'tcx>) {
// count. For example, if we removed `_2 = discriminant(_1)`, then we'll subtract one from
// `use_counts[_1]`. That in turn might make `_1` unused, so we loop until we hit a
// fixedpoint where there are no more unused locals.
remove_unused_definitions(&mut used_locals, body);
remove_unused_definitions(&mut used_locals, body, tcx);
// Finally, we'll actually do the work of shrinking `body.local_decls` and remapping the `Local`s.
let map = make_local_map(&mut body.local_decls, &used_locals);
@ -462,12 +462,22 @@ impl Visitor<'_> for UsedLocals {
}
/// Removes unused definitions. Updates the used locals to reflect the changes made.
fn remove_unused_definitions<'a, 'tcx>(used_locals: &'a mut UsedLocals, body: &mut Body<'tcx>) {
fn remove_unused_definitions<'a, 'tcx>(
used_locals: &'a mut UsedLocals,
body: &mut Body<'tcx>,
tcx: TyCtxt<'tcx>,
) {
// The use counts are updated as we remove the statements. A local might become unused
// during the retain operation, leading to a temporary inconsistency (storage statements or
// definitions referencing the local might remain). For correctness it is crucial that this
// computation reaches a fixed point.
let def_id = body.source.def_id();
let is_static = tcx.is_static(def_id);
let param_env = tcx.param_env(def_id);
let local_decls = body.local_decls.clone();
let mut modified = true;
while modified {
modified = false;
@ -479,7 +489,21 @@ fn remove_unused_definitions<'a, 'tcx>(used_locals: &'a mut UsedLocals, body: &m
StatementKind::StorageLive(local) | StatementKind::StorageDead(local) => {
used_locals.is_used(*local)
}
StatementKind::Assign(box (place, _)) => used_locals.is_used(place.local),
StatementKind::Assign(box (place, _)) => {
let used = used_locals.is_used(place.local);
let mut is_zst = false;
// ZST locals can be removed
if used && !is_static {
let ty = local_decls[place.local].ty;
let param_env_and = param_env.and(ty);
if let Ok(layout) = tcx.layout_of(param_env_and) {
is_zst = layout.is_zst();
}
}
used && !is_zst
}
StatementKind::SetDiscriminant { ref place, .. } => {
used_locals.is_used(place.local)

2
src/test/codegen/naked-functions.rs
View File

@ -9,6 +9,7 @@
#[naked]
pub fn naked_empty() {
// CHECK-NEXT: {{.+}}:
// CHECK-NEXT: %0 = alloca {}, align 1
// CHECK-NEXT: ret void
}
@ -18,6 +19,7 @@ pub fn naked_empty() {
// CHECK-NEXT: define void @naked_with_args(i{{[0-9]+( %a)?}})
pub fn naked_with_args(a: isize) {
// CHECK-NEXT: {{.+}}:
// CHECK-NEXT: %0 = alloca {}, align 1
// CHECK: ret void
}

1
src/test/mir-opt/const_prop/control_flow_simplification.hello.PreCodegen.before.mir
View File

@ -4,7 +4,6 @@ fn hello() -> () {
let mut _0: (); // return place in scope 0 at $DIR/control-flow-simplification.rs:11:14: 11:14
bb0: {
_0 = const (); // scope 0 at $DIR/control-flow-simplification.rs:14:6: 14:6
return; // scope 0 at $DIR/control-flow-simplification.rs:15:2: 15:2
}
}

1
src/test/mir-opt/const_prop/optimizes_into_variable.main.SimplifyLocals.after.32bit.mir
View File

@ -22,7 +22,6 @@ fn main() -> () {
_2 = const 3_i32; // scope 1 at $DIR/optimizes_into_variable.rs:13:13: 13:34
StorageLive(_3); // scope 2 at $DIR/optimizes_into_variable.rs:14:9: 14:10
_3 = const 42_u32; // scope 2 at $DIR/optimizes_into_variable.rs:14:13: 14:38
_0 = const (); // scope 0 at $DIR/optimizes_into_variable.rs:11:11: 15:2
StorageDead(_3); // scope 2 at $DIR/optimizes_into_variable.rs:15:1: 15:2
StorageDead(_2); // scope 1 at $DIR/optimizes_into_variable.rs:15:1: 15:2
StorageDead(_1); // scope 0 at $DIR/optimizes_into_variable.rs:15:1: 15:2

1
src/test/mir-opt/const_prop/optimizes_into_variable.main.SimplifyLocals.after.64bit.mir
View File

@ -22,7 +22,6 @@ fn main() -> () {
_2 = const 3_i32; // scope 1 at $DIR/optimizes_into_variable.rs:13:13: 13:34
StorageLive(_3); // scope 2 at $DIR/optimizes_into_variable.rs:14:9: 14:10
_3 = const 42_u32; // scope 2 at $DIR/optimizes_into_variable.rs:14:13: 14:38
_0 = const (); // scope 0 at $DIR/optimizes_into_variable.rs:11:11: 15:2
StorageDead(_3); // scope 2 at $DIR/optimizes_into_variable.rs:15:1: 15:2
StorageDead(_2); // scope 1 at $DIR/optimizes_into_variable.rs:15:1: 15:2
StorageDead(_1); // scope 0 at $DIR/optimizes_into_variable.rs:15:1: 15:2

1
src/test/mir-opt/dest-prop/cycle.main.DestinationPropagation.diff
View File

@ -56,7 +56,6 @@
StorageLive(_6); // scope 3 at $DIR/cycle.rs:14:10: 14:11
- _6 = _1; // scope 3 at $DIR/cycle.rs:14:10: 14:11
+ _6 = _4; // scope 3 at $DIR/cycle.rs:14:10: 14:11
_5 = const (); // scope 4 at $DIR/cycle.rs:14:5: 14:12
StorageDead(_6); // scope 3 at $DIR/cycle.rs:14:11: 14:12
StorageDead(_5); // scope 3 at $DIR/cycle.rs:14:12: 14:13
_0 = const (); // scope 0 at $DIR/cycle.rs:8:11: 15:2

1
src/test/mir-opt/dest-prop/union.main.DestinationPropagation.diff
View File

@ -31,7 +31,6 @@
StorageLive(_3); // scope 1 at $DIR/union.rs:15:5: 15:27
StorageLive(_4); // scope 1 at $DIR/union.rs:15:10: 15:26
_4 = (_1.0: u32); // scope 2 at $DIR/union.rs:15:19: 15:24
_3 = const (); // scope 3 at $DIR/union.rs:15:5: 15:27
StorageDead(_4); // scope 1 at $DIR/union.rs:15:26: 15:27
StorageDead(_3); // scope 1 at $DIR/union.rs:15:27: 15:28
_0 = const (); // scope 0 at $DIR/union.rs:8:11: 16:2

1
src/test/mir-opt/inline/inline_compatibility.inlined_no_sanitize.Inline.diff
View File

@ -16,7 +16,6 @@
- }
-
- bb1: {
+ _1 = const (); // scope 1 at $DIR/inline-compatibility.rs:24:5: 24:18
StorageDead(_1); // scope 0 at $DIR/inline-compatibility.rs:24:18: 24:19
_0 = const (); // scope 0 at $DIR/inline-compatibility.rs:23:37: 25:2
return; // scope 0 at $DIR/inline-compatibility.rs:25:2: 25:2

1
src/test/mir-opt/inline/inline_compatibility.inlined_target_feature.Inline.diff
View File

@ -16,7 +16,6 @@
- }
-
- bb1: {
+ _1 = const (); // scope 1 at $DIR/inline-compatibility.rs:13:5: 13:21
StorageDead(_1); // scope 0 at $DIR/inline-compatibility.rs:13:21: 13:22
_0 = const (); // scope 0 at $DIR/inline-compatibility.rs:12:40: 14:2
return; // scope 0 at $DIR/inline-compatibility.rs:14:2: 14:2

1
src/test/mir-opt/inline/inline_cycle.two.Inline.diff
View File

@ -37,7 +37,6 @@
+ StorageDead(_5); // scope 1 at $DIR/inline-cycle.rs:49:5: 49:12
+ StorageDead(_4); // scope 1 at $DIR/inline-cycle.rs:49:5: 49:12
+ StorageDead(_3); // scope 1 at $DIR/inline-cycle.rs:49:5: 49:12
+ _1 = const (); // scope 1 at $DIR/inline-cycle.rs:49:5: 49:12
+ StorageDead(_2); // scope 0 at $DIR/inline-cycle.rs:49:5: 49:12
StorageDead(_1); // scope 0 at $DIR/inline-cycle.rs:49:12: 49:13
_0 = const (); // scope 0 at $DIR/inline-cycle.rs:48:10: 50:2

1
src/test/mir-opt/inline/inline_options.main.Inline.after.mir
View File

@ -48,7 +48,6 @@ fn main() -> () {
bb4: {
StorageDead(_5); // scope 1 at $DIR/inline-options.rs:10:5: 10:21
_2 = const (); // scope 1 at $DIR/inline-options.rs:10:5: 10:21
StorageDead(_2); // scope 0 at $DIR/inline-options.rs:10:21: 10:22
_0 = const (); // scope 0 at $DIR/inline-options.rs:8:11: 11:2
return; // scope 0 at $DIR/inline-options.rs:11:2: 11:2

2
src/test/mir-opt/inline/issue_76997_inline_scopes_parenting.main.Inline.after.mir
View File

@ -28,8 +28,6 @@ fn main() -> () {
StorageLive(_5); // scope 1 at $DIR/issue-76997-inline-scopes-parenting.rs:6:5: 6:10
_5 = move (_3.0: ()); // scope 1 at $DIR/issue-76997-inline-scopes-parenting.rs:6:5: 6:10
StorageLive(_6); // scope 2 at $DIR/issue-76997-inline-scopes-parenting.rs:6:5: 6:10
_6 = const (); // scope 2 at $DIR/issue-76997-inline-scopes-parenting.rs:6:5: 6:10
_0 = const (); // scope 3 at $DIR/issue-76997-inline-scopes-parenting.rs:6:5: 6:10
StorageDead(_6); // scope 2 at $DIR/issue-76997-inline-scopes-parenting.rs:6:5: 6:10
StorageDead(_5); // scope 1 at $DIR/issue-76997-inline-scopes-parenting.rs:6:5: 6:10
StorageDead(_4); // scope 1 at $DIR/issue-76997-inline-scopes-parenting.rs:6:9: 6:10

1
src/test/mir-opt/issue_73223.main.PreCodegen.32bit.diff
View File

@ -117,7 +117,6 @@
StorageDead(_10); // scope 3 at $SRC_DIR/core/src/macros/mod.rs:LL:COL
StorageDead(_9); // scope 3 at $SRC_DIR/core/src/macros/mod.rs:LL:COL
StorageDead(_6); // scope 3 at $SRC_DIR/core/src/macros/mod.rs:LL:COL
_0 = const (); // scope 0 at $DIR/issue-73223.rs:1:11: 9:2
StorageDead(_4); // scope 1 at $DIR/issue-73223.rs:9:1: 9:2
StorageDead(_1); // scope 0 at $DIR/issue-73223.rs:9:1: 9:2
return; // scope 0 at $DIR/issue-73223.rs:9:2: 9:2

1
src/test/mir-opt/issue_73223.main.PreCodegen.64bit.diff
View File

@ -117,7 +117,6 @@
StorageDead(_10); // scope 3 at $SRC_DIR/core/src/macros/mod.rs:LL:COL
StorageDead(_9); // scope 3 at $SRC_DIR/core/src/macros/mod.rs:LL:COL
StorageDead(_6); // scope 3 at $SRC_DIR/core/src/macros/mod.rs:LL:COL
_0 = const (); // scope 0 at $DIR/issue-73223.rs:1:11: 9:2
StorageDead(_4); // scope 1 at $DIR/issue-73223.rs:9:1: 9:2
StorageDead(_1); // scope 0 at $DIR/issue-73223.rs:9:1: 9:2
return; // scope 0 at $DIR/issue-73223.rs:9:2: 9:2

1
src/test/mir-opt/lower_intrinsics.f_u64.PreCodegen.before.mir
View File

@ -27,7 +27,6 @@ fn f_u64() -> () {
StorageDead(_3); // scope 1 at $DIR/lower_intrinsics.rs:35:5: 35:21
StorageDead(_2); // scope 1 at $DIR/lower_intrinsics.rs:35:5: 35:21
StorageDead(_1); // scope 0 at $DIR/lower_intrinsics.rs:35:5: 35:21
_0 = const (); // scope 0 at $DIR/lower_intrinsics.rs:34:16: 36:2
return; // scope 0 at $DIR/lower_intrinsics.rs:36:2: 36:2
}
}

1
src/test/mir-opt/lower_intrinsics.f_unit.PreCodegen.before.mir
View File

@ -22,7 +22,6 @@ fn f_unit() -> () {
bb1: {
StorageDead(_2); // scope 1 at $DIR/lower_intrinsics.rs:29:5: 29:19
StorageDead(_1); // scope 0 at $DIR/lower_intrinsics.rs:29:18: 29:19
_0 = const (); // scope 0 at $DIR/lower_intrinsics.rs:28:17: 30:2
return; // scope 0 at $DIR/lower_intrinsics.rs:30:2: 30:2
}
}

2
src/test/mir-opt/multiple_return_terminators.test.MultipleReturnTerminators.diff
View File

@ -13,12 +13,10 @@
}
bb1: {
_0 = const (); // scope 0 at $DIR/multiple_return_terminators.rs:5:10: 7:6
goto -> bb3; // scope 0 at $DIR/multiple_return_terminators.rs:5:5: 9:6
}
bb2: {
_0 = const (); // scope 0 at $DIR/multiple_return_terminators.rs:7:12: 9:6
goto -> bb3; // scope 0 at $DIR/multiple_return_terminators.rs:5:5: 9:6
}

1
src/test/mir-opt/remove_unneeded_drops.cannot_opt_generic.RemoveUnneededDrops.diff
View File

@ -14,7 +14,6 @@
StorageLive(_2); // scope 0 at $DIR/remove_unneeded_drops.rs:21:5: 21:12
StorageLive(_3); // scope 0 at $DIR/remove_unneeded_drops.rs:21:10: 21:11
_3 = move _1; // scope 0 at $DIR/remove_unneeded_drops.rs:21:10: 21:11
_2 = const (); // scope 1 at $DIR/remove_unneeded_drops.rs:21:5: 21:12
drop(_3) -> [return: bb2, unwind: bb1]; // scope 1 at $DIR/remove_unneeded_drops.rs:21:5: 21:12
}

1
src/test/mir-opt/remove_unneeded_drops.dont_opt.RemoveUnneededDrops.diff
View File

@ -14,7 +14,6 @@
StorageLive(_2); // scope 0 at $DIR/remove_unneeded_drops.rs:9:5: 9:12
StorageLive(_3); // scope 0 at $DIR/remove_unneeded_drops.rs:9:10: 9:11
_3 = move _1; // scope 0 at $DIR/remove_unneeded_drops.rs:9:10: 9:11
_2 = const (); // scope 1 at $DIR/remove_unneeded_drops.rs:9:5: 9:12
drop(_3) -> [return: bb2, unwind: bb1]; // scope 1 at $DIR/remove_unneeded_drops.rs:9:5: 9:12
}

1
src/test/mir-opt/remove_unneeded_drops.opt.RemoveUnneededDrops.diff
View File

@ -14,7 +14,6 @@
StorageLive(_2); // scope 0 at $DIR/remove_unneeded_drops.rs:4:5: 4:12
StorageLive(_3); // scope 0 at $DIR/remove_unneeded_drops.rs:4:10: 4:11
_3 = _1; // scope 0 at $DIR/remove_unneeded_drops.rs:4:10: 4:11
_2 = const (); // scope 1 at $DIR/remove_unneeded_drops.rs:4:5: 4:12
- drop(_3) -> bb1; // scope 1 at $DIR/remove_unneeded_drops.rs:4:5: 4:12
- }
-

1
src/test/mir-opt/remove_unneeded_drops.opt_generic_copy.RemoveUnneededDrops.diff
View File

@ -14,7 +14,6 @@
StorageLive(_2); // scope 0 at $DIR/remove_unneeded_drops.rs:14:5: 14:12
StorageLive(_3); // scope 0 at $DIR/remove_unneeded_drops.rs:14:10: 14:11
_3 = _1; // scope 0 at $DIR/remove_unneeded_drops.rs:14:10: 14:11
_2 = const (); // scope 1 at $DIR/remove_unneeded_drops.rs:14:5: 14:12
- drop(_3) -> bb1; // scope 1 at $DIR/remove_unneeded_drops.rs:14:5: 14:12
- }
-

2
src/test/mir-opt/simplify_locals.c.SimplifyLocals.diff
View File

@ -25,7 +25,7 @@
- StorageDead(_3); // scope 1 at $DIR/simplify-locals.rs:16:25: 16:26
- StorageDead(_4); // scope 1 at $DIR/simplify-locals.rs:16:26: 16:27
- StorageDead(_2); // scope 1 at $DIR/simplify-locals.rs:16:26: 16:27
_0 = const (); // scope 0 at $DIR/simplify-locals.rs:13:8: 17:2
- _0 = const (); // scope 0 at $DIR/simplify-locals.rs:13:8: 17:2
StorageDead(_1); // scope 0 at $DIR/simplify-locals.rs:17:1: 17:2
return; // scope 0 at $DIR/simplify-locals.rs:17:2: 17:2
}

2
src/test/mir-opt/simplify_locals.d1.SimplifyLocals.diff
View File

@ -11,7 +11,7 @@
- StorageLive(_1); // scope 0 at $DIR/simplify-locals.rs:22:13: 22:17
- discriminant(_1) = 0; // scope 0 at $DIR/simplify-locals.rs:22:13: 22:17
- StorageDead(_1); // scope 0 at $DIR/simplify-locals.rs:22:17: 22:18
_0 = const (); // scope 0 at $DIR/simplify-locals.rs:20:9: 23:2
- _0 = const (); // scope 0 at $DIR/simplify-locals.rs:20:9: 23:2
return; // scope 0 at $DIR/simplify-locals.rs:23:2: 23:2
}
}

2
src/test/mir-opt/simplify_locals.d2.SimplifyLocals.diff
View File

@ -31,7 +31,7 @@
- // + literal: Const { ty: E, val: Value(Scalar(0x01)) }
- StorageDead(_1); // scope 0 at $DIR/simplify-locals.rs:28:25: 28:26
- StorageDead(_2); // scope 0 at $DIR/simplify-locals.rs:28:26: 28:27
_0 = const (); // scope 0 at $DIR/simplify-locals.rs:26:9: 29:2
- _0 = const (); // scope 0 at $DIR/simplify-locals.rs:26:9: 29:2
return; // scope 0 at $DIR/simplify-locals.rs:29:2: 29:2
}
}

2
src/test/mir-opt/simplify_locals.r.SimplifyLocals.diff
View File

@ -23,7 +23,7 @@
- StorageLive(_3); // scope 2 at $DIR/simplify-locals.rs:36:13: 36:19
- _3 = &mut _1; // scope 2 at $DIR/simplify-locals.rs:36:13: 36:19
- StorageDead(_3); // scope 2 at $DIR/simplify-locals.rs:36:19: 36:20
_0 = const (); // scope 0 at $DIR/simplify-locals.rs:32:8: 37:2
- _0 = const (); // scope 0 at $DIR/simplify-locals.rs:32:8: 37:2
StorageDead(_1); // scope 0 at $DIR/simplify-locals.rs:37:1: 37:2
return; // scope 0 at $DIR/simplify-locals.rs:37:2: 37:2
}

2
src/test/mir-opt/simplify_locals.t1.SimplifyLocals.diff
View File

@ -15,7 +15,7 @@
- _1 = (*_2); // scope 1 at $DIR/simplify-locals.rs:44:14: 44:15
- StorageDead(_2); // scope 0 at $DIR/simplify-locals.rs:44:17: 44:18
- StorageDead(_1); // scope 0 at $DIR/simplify-locals.rs:44:17: 44:18
_0 = const (); // scope 0 at $DIR/simplify-locals.rs:42:9: 45:2
- _0 = const (); // scope 0 at $DIR/simplify-locals.rs:42:9: 45:2
return; // scope 0 at $DIR/simplify-locals.rs:45:2: 45:2
}
}

2
src/test/mir-opt/simplify_locals.t2.SimplifyLocals.diff
View File

@ -15,7 +15,7 @@
- _1 = &mut (*_2); // scope 1 at $DIR/simplify-locals.rs:50:14: 50:20
- StorageDead(_2); // scope 0 at $DIR/simplify-locals.rs:50:22: 50:23
- StorageDead(_1); // scope 0 at $DIR/simplify-locals.rs:50:22: 50:23
_0 = const (); // scope 0 at $DIR/simplify-locals.rs:48:9: 51:2
- _0 = const (); // scope 0 at $DIR/simplify-locals.rs:48:9: 51:2
return; // scope 0 at $DIR/simplify-locals.rs:51:2: 51:2
}
}

2
src/test/mir-opt/simplify_locals.t3.SimplifyLocals.diff
View File

@ -19,7 +19,7 @@
- StorageDead(_3); // scope 0 at $DIR/simplify-locals.rs:56:23: 56:24
- StorageDead(_2); // scope 0 at $DIR/simplify-locals.rs:56:23: 56:24
- StorageDead(_1); // scope 0 at $DIR/simplify-locals.rs:56:23: 56:24
_0 = const (); // scope 0 at $DIR/simplify-locals.rs:54:9: 57:2
- _0 = const (); // scope 0 at $DIR/simplify-locals.rs:54:9: 57:2
return; // scope 0 at $DIR/simplify-locals.rs:57:2: 57:2
}
}

6
src/test/mir-opt/simplify_locals_fixedpoint.foo.SimplifyLocals.diff
View File

@ -30,7 +30,7 @@
}
bb1: {
_0 = const (); // scope 0 at $DIR/simplify-locals-fixedpoint.rs:8:6: 8:6
- _0 = const (); // scope 0 at $DIR/simplify-locals-fixedpoint.rs:8:6: 8:6
goto -> bb7; // scope 0 at $DIR/simplify-locals-fixedpoint.rs:4:5: 8:6
}
@ -51,12 +51,12 @@
}
bb4: {
_0 = const (); // scope 1 at $DIR/simplify-locals-fixedpoint.rs:5:21: 7:10
- _0 = const (); // scope 1 at $DIR/simplify-locals-fixedpoint.rs:5:21: 7:10
goto -> bb6; // scope 1 at $DIR/simplify-locals-fixedpoint.rs:5:9: 7:10
}
bb5: {
_0 = const (); // scope 1 at $DIR/simplify-locals-fixedpoint.rs:7:10: 7:10
- _0 = const (); // scope 1 at $DIR/simplify-locals-fixedpoint.rs:7:10: 7:10
goto -> bb6; // scope 1 at $DIR/simplify-locals-fixedpoint.rs:5:9: 7:10
}

2
src/test/mir-opt/simplify_locals_removes_unused_consts.main.SimplifyLocals.diff
View File

@ -71,8 +71,8 @@
- StorageDead(_9); // scope 1 at $DIR/simplify-locals-removes-unused-consts.rs:16:34: 16:35
- StorageDead(_11); // scope 1 at $DIR/simplify-locals-removes-unused-consts.rs:16:35: 16:36
- StorageDead(_8); // scope 1 at $DIR/simplify-locals-removes-unused-consts.rs:16:35: 16:36
- _0 = const (); // scope 0 at $DIR/simplify-locals-removes-unused-consts.rs:12:11: 17:2
+ StorageDead(_2); // scope 1 at $DIR/simplify-locals-removes-unused-consts.rs:16:35: 16:36
_0 = const (); // scope 0 at $DIR/simplify-locals-removes-unused-consts.rs:12:11: 17:2
return; // scope 0 at $DIR/simplify-locals-removes-unused-consts.rs:17:2: 17:2
}
}

1
src/test/mir-opt/uninhabited_enum.process_void.SimplifyLocals.after.mir
View File

@ -13,7 +13,6 @@ fn process_void(_1: *const Void) -> () {
bb0: {
StorageLive(_2); // scope 0 at $DIR/uninhabited-enum.rs:14:8: 14:14
_2 = &(*_1); // scope 2 at $DIR/uninhabited-enum.rs:14:26: 14:33
_0 = const (); // scope 0 at $DIR/uninhabited-enum.rs:13:41: 17:2
StorageDead(_2); // scope 0 at $DIR/uninhabited-enum.rs:17:1: 17:2
return; // scope 0 at $DIR/uninhabited-enum.rs:17:2: 17:2
}

1
src/test/mir-opt/while_let_loops.change_loop_body.PreCodegen.after.32bit.mir
View File

@ -10,7 +10,6 @@ fn change_loop_body() -> () {
bb0: {
StorageLive(_1); // scope 0 at $DIR/while_let_loops.rs:6:9: 6:15
_1 = const 0_i32; // scope 0 at $DIR/while_let_loops.rs:6:18: 6:19
_0 = const (); // scope 1 at $DIR/while_let_loops.rs:7:5: 10:6
StorageDead(_1); // scope 0 at $DIR/while_let_loops.rs:11:1: 11:2
return; // scope 0 at $DIR/while_let_loops.rs:11:2: 11:2
}

1
src/test/mir-opt/while_let_loops.change_loop_body.PreCodegen.after.64bit.mir
View File

@ -10,7 +10,6 @@ fn change_loop_body() -> () {
bb0: {
StorageLive(_1); // scope 0 at $DIR/while_let_loops.rs:6:9: 6:15
_1 = const 0_i32; // scope 0 at $DIR/while_let_loops.rs:6:18: 6:19
_0 = const (); // scope 1 at $DIR/while_let_loops.rs:7:5: 10:6
StorageDead(_1); // scope 0 at $DIR/while_let_loops.rs:11:1: 11:2
return; // scope 0 at $DIR/while_let_loops.rs:11:2: 11:2
}

2
src/test/mir-opt/while_storage.while_loop.PreCodegen.after.mir
View File

@ -24,7 +24,6 @@ fn while_loop(_1: bool) -> () {
}
bb2: {
_0 = const (); // scope 0 at $DIR/while-storage.rs:10:5: 14:6
goto -> bb7; // scope 0 at $DIR/while-storage.rs:10:5: 14:6
}
@ -44,7 +43,6 @@ fn while_loop(_1: bool) -> () {
}
bb5: {
_0 = const (); // scope 0 at $DIR/while-storage.rs:12:13: 12:18
StorageDead(_4); // scope 0 at $DIR/while-storage.rs:13:9: 13:10
goto -> bb7; // scope 0 at $DIR/while-storage.rs:1:1: 1:1
}