Auto merge of #132277 - workingjubilee:rollup-5e6q6e4, r=workingjubilee

Rollup of 9 pull requests

Successful merges:

 - #130259 (Lower AST node id only once)
 - #131441 (Add a new trait `proc_macro::ToTokens`)
 - #132247 (stable_mir: Directly use types from rustc_abi)
 - #132249 (compiler: Add rustc_abi dependence to the compiler)
 - #132255 (Add `LayoutData::is_uninhabited` and use it)
 - #132258 ([rustdoc] Unify variant struct fields margins with struct fields)
 - #132260 (cg_llvm: Use a type-safe helper to cast `&str` and `&[u8]` to `*const c_char`)
 - #132261 (refactor: cleaner check to return None)
 - #132271 (Updating Fuchsia platform-support documentation)

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

1 files changed, 18 insertions, 0 deletions

diff --git a/compiler/rustc_codegen_llvm/src/common.rs b/compiler/rustc_codegen_llvm/src/common.rs
index ff47eb944dd..29adc616ee2 100644
--- a/compiler/rustc_codegen_llvm/src/common.rs
+++ b/compiler/rustc_codegen_llvm/src/common.rs
@@ -392,3 +392,21 @@ pub(crate) fn get_dllimport<'tcx>(
     tcx.native_library(id)
         .and_then(|lib| lib.dll_imports.iter().find(|di| di.name.as_str() == name))
 }
+
+/// Extension trait for explicit casts to `*const c_char`.
+pub(crate) trait AsCCharPtr {
+    /// Equivalent to `self.as_ptr().cast()`, but only casts to `*const c_char`.
+    fn as_c_char_ptr(&self) -> *const c_char;
+}
+
+impl AsCCharPtr for str {
+    fn as_c_char_ptr(&self) -> *const c_char {
+        self.as_ptr().cast()
+    }
+}
+
+impl AsCCharPtr for [u8] {
+    fn as_c_char_ptr(&self) -> *const c_char {
+        self.as_ptr().cast()
+    }
+}