From 51bccdd1ab0802dd5a55bd06e956c8d547bdec2d Mon Sep 17 00:00:00 2001
From: Sasha Pourcelot <sasha.pourcelot@protonmail.com>
Date: Sun, 10 Aug 2025 09:44:39 +0200
Subject: Port `#[custom_mir(..)]` to the new attribute system

---
 compiler/rustc_errors/src/diagnostic_impls.rs | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)

(limited to 'compiler/rustc_errors')

diff --git a/compiler/rustc_errors/src/diagnostic_impls.rs b/compiler/rustc_errors/src/diagnostic_impls.rs
index eca5806fac5..698b6b8d504 100644
--- a/compiler/rustc_errors/src/diagnostic_impls.rs
+++ b/compiler/rustc_errors/src/diagnostic_impls.rs
@@ -9,6 +9,7 @@ use rustc_abi::TargetDataLayoutErrors;
 use rustc_ast::util::parser::ExprPrecedence;
 use rustc_ast_pretty::pprust;
 use rustc_hir::RustcVersion;
+use rustc_hir::attrs::{MirDialect, MirPhase};
 use rustc_macros::Subdiagnostic;
 use rustc_span::edition::Edition;
 use rustc_span::{Ident, MacroRulesNormalizedIdent, Span, Symbol};
@@ -312,6 +313,28 @@ impl IntoDiagArg for ExprPrecedence {
     }
 }
 
+impl IntoDiagArg for MirDialect {
+    fn into_diag_arg(self, _path: &mut Option<PathBuf>) -> DiagArgValue {
+        let arg = match self {
+            MirDialect::Analysis => "analysis",
+            MirDialect::Built => "built",
+            MirDialect::Runtime => "runtime",
+        };
+        DiagArgValue::Str(Cow::Borrowed(arg))
+    }
+}
+
+impl IntoDiagArg for MirPhase {
+    fn into_diag_arg(self, _path: &mut Option<PathBuf>) -> DiagArgValue {
+        let arg = match self {
+            MirPhase::Initial => "initial",
+            MirPhase::PostCleanup => "post-cleanup",
+            MirPhase::Optimized => "optimized",
+        };
+        DiagArgValue::Str(Cow::Borrowed(arg))
+    }
+}
+
 #[derive(Clone)]
 pub struct DiagSymbolList<S = Symbol>(Vec<S>);
 
-- 
cgit 1.4.1-3-g733a5