Auto merge of #83067 - JohnTitor:rollup-0wo338i, r=JohnTitor

Rollup of 6 pull requests

Successful merges:

 - #82984 (Simplify ast block lowering)
 - #83012 (Update Clippy)
 - #83020 (Emit the enum range assumption if the range only contains one element)
 - #83037 (Support merge_functions option in NewPM since LLVM >= 12)
 - #83052 (updated vulnerable deps)
 - #83059 (Allow configuring `rustdoc --disable-minification` in config.toml)

Failed merges:

r? `@ghost`
`@rustbot` modify labels: rollup

Author: bors

Cargo.lock

@@ -95,12 +95,6 @@ version = "1.0.34"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "bf8dcb5b4bbaa28653b647d8c77bd4ed40183b48882e130c1f1ffb73de069fd7"
 
-[[package]]
-name = "arc-swap"
-version = "0.4.7"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4d25d88fd6b8041580a654f9d0c581a047baee2b3efee13275f2fc392fc75034"
-
 [[package]]
 name = "array_tool"
 version = "1.0.3"
@@ -177,7 +171,7 @@ dependencies = [
  "block-padding",
  "byte-tools",
  "byteorder",
- "generic-array 0.12.3",
+ "generic-array 0.12.4",
 ]
 
 [[package]]
@@ -570,6 +564,7 @@ dependencies = [
  "clippy_lints",
  "compiletest_rs 0.6.0",
  "derive-new",
+ "regex",
  "rustc-workspace-hack",
  "rustc_tools_util 0.2.0",
  "semver 0.11.0",
@@ -1006,7 +1001,7 @@ version = "0.8.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f3d0c8c8752312f9713efd397ff63acb9f85585afbf179282e720e7704954dd5"
 dependencies = [
- "generic-array 0.12.3",
+ "generic-array 0.12.4",
 ]
 
 [[package]]
@@ -1399,9 +1394,9 @@ dependencies = [
 
 [[package]]
 name = "generic-array"
-version = "0.12.3"
+version = "0.12.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c68f0274ae0e023facc3c97b2e00f076be70e254bc851d972503b328db79b2ec"
+checksum = "ffdf9f34f1447443d37393cc6c2b8313aebddcd96906caf34e54c68d8e57d7bd"
 dependencies = [
  "typenum",
 ]
@@ -4917,11 +4912,10 @@ checksum = "42a568c8f2cd051a4d283bd6eb0343ac214c1b0f1ac19f93e1175b2dee38c73d"
 
 [[package]]
 name = "signal-hook-registry"
-version = "1.2.1"
+version = "1.2.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a3e12110bc539e657a646068aaf5eb5b63af9d0c1f7b29c97113fad80e15f035"
+checksum = "ce32ea0c6c56d5eacaeb814fbed9960547021d3edd010ded1425f180536b20ab"
 dependencies = [
- "arc-swap",
  "libc",
 ]
 
@@ -4933,9 +4927,9 @@ checksum = "fa8f3741c7372e75519bd9346068370c9cdaabcc1f9599cbcf2a2719352286b7"
 
 [[package]]
 name = "sized-chunks"
-version = "0.6.2"
+version = "0.6.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1ec31ceca5644fa6d444cc77548b88b67f46db6f7c71683b0f9336e671830d2f"
+checksum = "65e65d6a9f13cd78f361ea5a2cf53a45d67cdda421ba0316b9be101560f3d207"
 dependencies = [
  "bitmaps",
  "typenum",

compiler/rustc_ast_lowering/src/lib.rs

@@ -2409,26 +2409,12 @@ impl<'a, 'hir> LoweringContext<'a, 'hir> {
     }
 
     fn lower_block_noalloc(&mut self, b: &Block, targeted_by_break: bool) -> hir::Block<'hir> {
-        let mut expr: Option<&'hir _> = None;
-
-        let stmts = self.arena.alloc_from_iter(
-            b.stmts
-                .iter()
-                .enumerate()
-                .filter_map(|(index, stmt)| {
-                    if index == b.stmts.len() - 1 {
-                        if let StmtKind::Expr(ref e) = stmt.kind {
-                            expr = Some(self.lower_expr(e));
-                            None
-                        } else {
-                            Some(self.lower_stmt(stmt))
-                        }
-                    } else {
-                        Some(self.lower_stmt(stmt))
-                    }
-                })
-                .flatten(),
-        );
+        let (stmts, expr) = match &*b.stmts {
+            [stmts @ .., Stmt { kind: StmtKind::Expr(e), .. }] => (stmts, Some(&*e)),
+            stmts => (stmts, None),
+        };
+        let stmts = self.arena.alloc_from_iter(stmts.iter().flat_map(|stmt| self.lower_stmt(stmt)));
+        let expr = expr.map(|e| self.lower_expr(e));
         let rules = self.lower_block_check_mode(&b.rules);
         let hir_id = self.lower_node_id(b.id);