https://github.com/tbaederr created 
https://github.com/llvm/llvm-project/pull/163921

They don't use the instance at all, so make them static.

>From 79dc72c3fdbbc45e19ccfe0d2e95f11c7eb28426 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Timm=20B=C3=A4der?= <[email protected]>
Date: Fri, 17 Oct 2025 08:42:51 +0200
Subject: [PATCH] [clang][AST] Make some ASTContext functions static

They don't use the instance at all, so make them static.
---
 clang/include/clang/AST/ASTContext.h | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/clang/include/clang/AST/ASTContext.h 
b/clang/include/clang/AST/ASTContext.h
index 78220d4d8ff5b..33aa2d343aa7a 100644
--- a/clang/include/clang/AST/ASTContext.h
+++ b/clang/include/clang/AST/ASTContext.h
@@ -2874,11 +2874,11 @@ class ASTContext : public RefCountedBase<ASTContext> {
   /// returned type is guaranteed to be free of any of these, allowing two
   /// canonical types to be compared for exact equality with a simple pointer
   /// comparison.
-  CanQualType getCanonicalType(QualType T) const {
+  static CanQualType getCanonicalType(QualType T) {
     return CanQualType::CreateUnsafe(T.getCanonicalType());
   }
 
-  const Type *getCanonicalType(const Type *T) const {
+  static const Type *getCanonicalType(const Type *T) {
     return T->getCanonicalTypeInternal().getTypePtr();
   }
 
@@ -2890,10 +2890,10 @@ class ASTContext : public RefCountedBase<ASTContext> {
   CanQualType getCanonicalParamType(QualType T) const;
 
   /// Determine whether the given types \p T1 and \p T2 are equivalent.
-  bool hasSameType(QualType T1, QualType T2) const {
+  static bool hasSameType(QualType T1, QualType T2) {
     return getCanonicalType(T1) == getCanonicalType(T2);
   }
-  bool hasSameType(const Type *T1, const Type *T2) const {
+  static bool hasSameType(const Type *T1, const Type *T2) {
     return getCanonicalType(T1) == getCanonicalType(T2);
   }
 
@@ -2921,7 +2921,7 @@ class ASTContext : public RefCountedBase<ASTContext> {
 
   /// Determine whether the given types are equivalent after
   /// cvr-qualifiers have been removed.
-  bool hasSameUnqualifiedType(QualType T1, QualType T2) const {
+  static bool hasSameUnqualifiedType(QualType T1, QualType T2) {
     return getCanonicalType(T1).getTypePtr() ==
            getCanonicalType(T2).getTypePtr();
   }

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