Auto merge of #7604 - flip1995:rustup, r=Manishearth

Rustup

I'll write some TODOs later. This time I'll need a review for this Rustup

r? `@ghost`  (for now)

changelog: none

CHANGELOG.md

@@ -964,7 +964,7 @@ Released 2020-11-19
   [#5907](https://github.com/rust-lang/rust-clippy/pull/5907)
 * [`suspicious_arithmetic_impl`]: extend to implementations of `BitAnd`, `BitOr`, `BitXor`, `Rem`, `Shl`, and `Shr`
   [#5884](https://github.com/rust-lang/rust-clippy/pull/5884)
-* [`invalid_atomic_ordering`]: detect misuse of `compare_exchange`, `compare_exchange_weak`, and `fetch_update`
+* `invalid_atomic_ordering`: detect misuse of `compare_exchange`, `compare_exchange_weak`, and `fetch_update`
   [#6025](https://github.com/rust-lang/rust-clippy/pull/6025)
 * Avoid [`redundant_pattern_matching`] triggering in macros
   [#6069](https://github.com/rust-lang/rust-clippy/pull/6069)
@@ -1451,7 +1451,7 @@ Released 2020-03-12
 * [`option_as_ref_deref`] [#4945](https://github.com/rust-lang/rust-clippy/pull/4945)
 * [`wildcard_in_or_patterns`] [#4960](https://github.com/rust-lang/rust-clippy/pull/4960)
 * [`iter_nth_zero`] [#4966](https://github.com/rust-lang/rust-clippy/pull/4966)
-* [`invalid_atomic_ordering`] [#4999](https://github.com/rust-lang/rust-clippy/pull/4999)
+* `invalid_atomic_ordering` [#4999](https://github.com/rust-lang/rust-clippy/pull/4999)
 * [`skip_while_next`] [#5067](https://github.com/rust-lang/rust-clippy/pull/5067)
 
 ### Moves and Deprecations
@@ -2712,7 +2712,6 @@ Released 2018-09-13
 [`integer_arithmetic`]: https://rust-lang.github.io/rust-clippy/master/index.html#integer_arithmetic
 [`integer_division`]: https://rust-lang.github.io/rust-clippy/master/index.html#integer_division
 [`into_iter_on_ref`]: https://rust-lang.github.io/rust-clippy/master/index.html#into_iter_on_ref
-[`invalid_atomic_ordering`]: https://rust-lang.github.io/rust-clippy/master/index.html#invalid_atomic_ordering
 [`invalid_null_ptr_usage`]: https://rust-lang.github.io/rust-clippy/master/index.html#invalid_null_ptr_usage
 [`invalid_regex`]: https://rust-lang.github.io/rust-clippy/master/index.html#invalid_regex
 [`invalid_upcast_comparisons`]: https://rust-lang.github.io/rust-clippy/master/index.html#invalid_upcast_comparisons

clippy_lints/src/assertions_on_constants.rs

@@ -1,5 +1,6 @@
 use clippy_utils::consts::{constant, Constant};
 use clippy_utils::diagnostics::span_lint_and_help;
+use clippy_utils::higher;
 use clippy_utils::source::snippet_opt;
 use clippy_utils::{is_direct_expn_of, is_expn_of, match_panic_call};
 use if_chain::if_chain;
@@ -116,7 +117,7 @@ enum AssertKind {
 /// where `message` is any expression and `c` is a constant bool.
 fn match_assert_with_message<'tcx>(cx: &LateContext<'tcx>, expr: &'tcx Expr<'_>) -> Option<AssertKind> {
     if_chain! {
-        if let ExprKind::If(cond, then, _) = expr.kind;
+        if let Some(higher::If { cond, then, .. }) = higher::If::hir(expr);
         if let ExprKind::Unary(UnOp::Not, expr) = cond.kind;
         // bind the first argument of the `assert!` macro
         if let Some((Constant::Bool(is_true), _)) = constant(cx, cx.typeck_results(), expr);

clippy_lints/src/blocks_in_if_conditions.rs

@@ -1,4 +1,5 @@
 use clippy_utils::diagnostics::{span_lint, span_lint_and_sugg};
+use clippy_utils::higher;
 use clippy_utils::source::snippet_block_with_applicability;
 use clippy_utils::ty::implements_trait;
 use clippy_utils::{differing_macro_contexts, get_parent_expr};
@@ -92,7 +93,7 @@ impl<'tcx> LateLintPass<'tcx> for BlocksInIfConditions {
         if in_external_macro(cx.sess(), expr.span) {
             return;
         }
-        if let ExprKind::If(cond, _, _) = &expr.kind {
+        if let Some(higher::If { cond, .. }) = higher::If::hir(expr) {
             if let ExprKind::Block(block, _) = &cond.kind {
                 if block.rules == BlockCheckMode::DefaultBlock {
                     if block.stmts.is_empty() {

clippy_lints/src/booleans.rs

@@ -116,7 +116,7 @@ impl<'a, 'tcx, 'v> Hir2Qmm<'a, 'tcx, 'v> {
         // prevent folding of `cfg!` macros and the like
         if !e.span.from_expansion() {
             match &e.kind {
-                ExprKind::Unary(UnOp::Not, inner) => return Ok(Bool::Not(box self.run(inner)?)),
+                ExprKind::Unary(UnOp::Not, inner) => return Ok(Bool::Not(Box::new(self.run(inner)?))),
                 ExprKind::Binary(binop, lhs, rhs) => match &binop.node {
                     BinOpKind::Or => {
                         return Ok(Bool::Or(self.extract(BinOpKind::Or, &[lhs, rhs], Vec::new())?));