setup CI and tidy to use typos for spellchecking and fix few typos

Author: klensy

.github/workflows/spellcheck.yml

@@ -0,0 +1,23 @@
+# This workflow runs spellcheck job
+
+name: Spellcheck
+on:
+  pull_request:
+    branches:
+      - "**"
+
+jobs:
+  spellcheck:
+    name: run spellchecker
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout the source code
+        uses: actions/checkout@v4
+
+      - name: check typos
+        # sync version with src/tools/tidy/src/ext_tool_checks.rs in spellcheck_runner
+        uses: crate-ci/typos@v1.34.0
+        with:
+          # sync target files with src/tools/tidy/src/ext_tool_checks.rs in check_impl
+          files: ./compiler ./library ./src/bootstrap ./src/librustdoc
+          config: ./typos.toml

REUSE.toml

@@ -36,6 +36,7 @@ path = [
     "rustfmt.toml",
     "rust-bors.toml",
     "triagebot.toml",
+    "typos.toml",
     "x",
     "x.ps1",
     "x.py",

compiler/rustc_ast/src/ast.rs

@@ -1344,7 +1344,7 @@ impl Expr {
         }
     }
 
-    /// Returns an expression with (when possible) *one* outter brace removed
+    /// Returns an expression with (when possible) *one* outer brace removed
     pub fn maybe_unwrap_block(&self) -> &Expr {
         if let ExprKind::Block(block, None) = &self.kind
             && let [stmt] = block.stmts.as_slice()

compiler/rustc_ast/src/visit.rs

@@ -142,7 +142,7 @@ macro_rules! common_visitor_and_walkers {
             )?
 
             // Methods in this trait have one of three forms, with the last two forms
-            // only occuring on `MutVisitor`:
+            // only occurring on `MutVisitor`:
             //
             //   fn visit_t(&mut self, t: &mut T);                      // common
             //   fn flat_map_t(&mut self, t: T) -> SmallVec<[T; 1]>;    // rare

compiler/rustc_ast_passes/messages.ftl

@@ -1,6 +1,6 @@
 ast_passes_abi_cannot_be_coroutine =
     functions with the {$abi} ABI cannot be `{$coroutine_kind_str}`
-    .suggestion = remove the `{$coroutine_kind_str}` keyword from this definiton
+    .suggestion = remove the `{$coroutine_kind_str}` keyword from this definition
 
 ast_passes_abi_custom_safe_foreign_function =
     foreign functions with the "custom" ABI cannot be safe

compiler/rustc_attr_parsing/src/attributes/cfg.rs

@@ -14,7 +14,7 @@ use crate::{fluent_generated, parse_version};
 
 /// Emitter of a builtin lint from `cfg_matches`.
 ///
-/// Used to support emiting a lint (currently on check-cfg), either:
+/// Used to support emitting a lint (currently on check-cfg), either:
 ///  - as an early buffered lint (in `rustc`)
 ///  - or has a "normal" lint from HIR (in `rustdoc`)
 pub trait CfgMatchesLintEmitter {

compiler/rustc_attr_parsing/src/context.rs

@@ -187,7 +187,7 @@ impl Stage for Late {
     }
 }
 
-/// used when parsing attributes for miscelaneous things *before* ast lowering
+/// used when parsing attributes for miscellaneous things *before* ast lowering
 pub struct Early;
 /// used when parsing attributes during ast lowering
 pub struct Late;

compiler/rustc_builtin_macros/src/autodiff.rs

@@ -562,7 +562,7 @@ mod llvm_enzyme {
     /// so instead we manually build something that should pass the type checker.
     /// We also add a inline_asm line, as one more barrier for rustc to prevent inlining
     /// or const propagation. inline_asm will also triggers an Enzyme crash if due to another
-    /// bug would ever try to accidentially differentiate this placeholder function body.
+    /// bug would ever try to accidentally differentiate this placeholder function body.
     /// Finally, we also add back_box usages of all input arguments, to prevent rustc
     /// from optimizing any arguments away.
     fn gen_enzyme_body(
@@ -606,7 +606,7 @@ mod llvm_enzyme {
             return body;
         }
 
-        // Everything from here onwards just tries to fullfil the return type. Fun!
+        // Everything from here onwards just tries to fulfil the return type. Fun!
 
         // having an active-only return means we'll drop the original return type.
         // So that can be treated identical to not having one in the first place.

compiler/rustc_codegen_llvm/src/intrinsic.rs

@@ -107,7 +107,7 @@ fn call_simple_intrinsic<'ll, 'tcx>(
         sym::minimumf32 => ("llvm.minimum", &[bx.type_f32()]),
         sym::minimumf64 => ("llvm.minimum", &[bx.type_f64()]),
         // There are issues on x86_64 and aarch64 with the f128 variant,
-        // let's instead use the instrinsic fallback body.
+        // let's instead use the intrinsic fallback body.
         // sym::minimumf128 => ("llvm.minimum", &[cx.type_f128()]),
         sym::maxnumf16 => ("llvm.maxnum", &[bx.type_f16()]),
         sym::maxnumf32 => ("llvm.maxnum", &[bx.type_f32()]),
@@ -118,7 +118,7 @@ fn call_simple_intrinsic<'ll, 'tcx>(
         sym::maximumf32 => ("llvm.maximum", &[bx.type_f32()]),
         sym::maximumf64 => ("llvm.maximum", &[bx.type_f64()]),
         // There are issues on x86_64 and aarch64 with the f128 variant,
-        // let's instead use the instrinsic fallback body.
+        // let's instead use the intrinsic fallback body.
         // sym::maximumf128 => ("llvm.maximum", &[cx.type_f128()]),
         sym::copysignf16 => ("llvm.copysign", &[bx.type_f16()]),
         sym::copysignf32 => ("llvm.copysign", &[bx.type_f32()]),

compiler/rustc_codegen_llvm/src/llvm/enzyme_ffi.rs

@@ -40,7 +40,7 @@ unsafe extern "C" {
     pub(crate) fn LLVMDumpValue(V: &Value);
     pub(crate) fn LLVMGetFunctionCallConv(F: &Value) -> c_uint;
     pub(crate) fn LLVMGetReturnType(T: &Type) -> &Type;
-    pub(crate) fn LLVMGetParams(Fnc: &Value, parms: *mut &Value);
+    pub(crate) fn LLVMGetParams(Fnc: &Value, params: *mut &Value);
     pub(crate) fn LLVMGetNamedFunction(M: &Module, Name: *const c_char) -> Option<&Value>;
 }