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Do min_const_fn checks for SetDiscriminants target #66790

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merged 3 commits into from
Dec 1, 2019
Merged

Do min_const_fn checks for SetDiscriminants target #66790

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c66ad14
Check SetDiscriminant place
pvdrz Nov 26, 2019
d7c09f7
Change way of checking SetDiscriminant
pvdrz Nov 26, 2019
2ced9d9
Merge match branches
pvdrz Nov 30, 2019
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5 changes: 4 additions & 1 deletion src/librustc_mir/transform/check_consts/validation.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -566,9 +566,12 @@ impl Visitor<'tcx> for Validator<'_, 'mir, 'tcx> {
StatementKind::FakeRead(FakeReadCause::ForMatchedPlace, _) => {
self.check_op(ops::IfOrMatch);
}
StatementKind::SetDiscriminant { ref place, .. } => {
let ctx = PlaceContext::MutatingUse(MutatingUseContext::Projection);
self.visit_place(&place, ctx, location)
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}
// FIXME(eddyb) should these really do nothing?
StatementKind::FakeRead(..) |
StatementKind::SetDiscriminant { .. } |
StatementKind::StorageLive(_) |
StatementKind::StorageDead(_) |
StatementKind::InlineAsm {..} |
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2 changes: 1 addition & 1 deletion src/librustc_mir/transform/qualify_min_const_fn.rs
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Expand Up @@ -225,7 +225,7 @@ fn check_statement(
StatementKind::FakeRead(_, place) => check_place(tcx, place, span, def_id, body),

// just an assignment
StatementKind::SetDiscriminant { .. } => Ok(()),
StatementKind::SetDiscriminant { place, .. } => check_place(tcx, place, span, def_id, body),

| StatementKind::InlineAsm { .. } => {
Err((span, "cannot use inline assembly in const fn".into()))
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