Auto merge of #131111 - matthiaskrgr:rollup-n6do187, r=matthiaskrgr

Rollup of 4 pull requests

Successful merges:

 - #130005 (Replace -Z default-hidden-visibility with -Z default-visibility)
 - #130229 (ptr::add/sub: do not claim equivalence with `offset(c as isize)`)
 - #130773 (Update Unicode escapes in `/library/core/src/char/methods.rs`)
 - #130933 (rustdoc: lists items that contain multiple paragraphs are more clear)

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

compiler/rustc_codegen_llvm/src/allocator.rs

@@ -77,18 +77,20 @@ pub(crate) unsafe fn codegen(
         // __rust_alloc_error_handler_should_panic
         let name = OomStrategy::SYMBOL;
         let ll_g = llvm::LLVMRustGetOrInsertGlobal(llmod, name.as_ptr().cast(), name.len(), i8);
-        if tcx.sess.default_hidden_visibility() {
-            llvm::LLVMRustSetVisibility(ll_g, llvm::Visibility::Hidden);
-        }
+        llvm::LLVMRustSetVisibility(
+            ll_g,
+            llvm::Visibility::from_generic(tcx.sess.default_visibility()),
+        );
         let val = tcx.sess.opts.unstable_opts.oom.should_panic();
         let llval = llvm::LLVMConstInt(i8, val as u64, False);
         llvm::LLVMSetInitializer(ll_g, llval);
 
         let name = NO_ALLOC_SHIM_IS_UNSTABLE;
         let ll_g = llvm::LLVMRustGetOrInsertGlobal(llmod, name.as_ptr().cast(), name.len(), i8);
-        if tcx.sess.default_hidden_visibility() {
-            llvm::LLVMRustSetVisibility(ll_g, llvm::Visibility::Hidden);
-        }
+        llvm::LLVMRustSetVisibility(
+            ll_g,
+            llvm::Visibility::from_generic(tcx.sess.default_visibility()),
+        );
         let llval = llvm::LLVMConstInt(i8, 0, False);
         llvm::LLVMSetInitializer(ll_g, llval);
     }
@@ -132,9 +134,11 @@ fn create_wrapper_function(
             None
         };
 
-        if tcx.sess.default_hidden_visibility() {
-            llvm::LLVMRustSetVisibility(llfn, llvm::Visibility::Hidden);
-        }
+        llvm::LLVMRustSetVisibility(
+            llfn,
+            llvm::Visibility::from_generic(tcx.sess.default_visibility()),
+        );
+
         if tcx.sess.must_emit_unwind_tables() {
             let uwtable =
                 attributes::uwtable_attr(llcx, tcx.sess.opts.unstable_opts.use_sync_unwind);

compiler/rustc_codegen_llvm/src/declare.rs

@@ -22,6 +22,7 @@ use tracing::debug;
 use crate::abi::{FnAbi, FnAbiLlvmExt};
 use crate::context::CodegenCx;
 use crate::llvm::AttributePlace::Function;
+use crate::llvm::Visibility;
 use crate::type_::Type;
 use crate::value::Value;
 use crate::{attributes, llvm};
@@ -84,11 +85,7 @@ impl<'ll, 'tcx> CodegenCx<'ll, 'tcx> {
         fn_type: &'ll Type,
     ) -> &'ll Value {
         // Declare C ABI functions with the visibility used by C by default.
-        let visibility = if self.tcx.sess.default_hidden_visibility() {
-            llvm::Visibility::Hidden
-        } else {
-            llvm::Visibility::Default
-        };
+        let visibility = Visibility::from_generic(self.tcx.sess.default_visibility());
 
         declare_raw_fn(self, name, llvm::CCallConv, unnamed, visibility, fn_type)
     }
@@ -107,11 +104,7 @@ impl<'ll, 'tcx> CodegenCx<'ll, 'tcx> {
         unnamed: llvm::UnnamedAddr,
         fn_type: &'ll Type,
     ) -> &'ll Value {
-        let visibility = if self.tcx.sess.default_hidden_visibility() {
-            llvm::Visibility::Hidden
-        } else {
-            llvm::Visibility::Default
-        };
+        let visibility = Visibility::from_generic(self.tcx.sess.default_visibility());
         declare_raw_fn(self, name, callconv, unnamed, visibility, fn_type)
     }
 

compiler/rustc_codegen_llvm/src/llvm/ffi.rs

@@ -4,6 +4,7 @@
 use std::marker::PhantomData;
 
 use libc::{c_char, c_int, c_uint, c_ulonglong, c_void, size_t};
+use rustc_target::spec::SymbolVisibility;
 
 use super::RustString;
 use super::debuginfo::{
@@ -133,6 +134,16 @@ pub enum Visibility {
     Protected = 2,
 }
 
+impl Visibility {
+    pub fn from_generic(visibility: SymbolVisibility) -> Self {
+        match visibility {
+            SymbolVisibility::Hidden => Visibility::Hidden,
+            SymbolVisibility::Protected => Visibility::Protected,
+            SymbolVisibility::Interposable => Visibility::Default,
+        }
+    }
+}
+
 /// LLVMUnnamedAddr
 #[repr(C)]
 pub enum UnnamedAddr {