https://github.com/Ankur-0429 updated
https://github.com/llvm/llvm-project/pull/133878
>From 289f8630dccf916b8cf7cc43758bae60df036c5d Mon Sep 17 00:00:00 2001
From: Ankur Ahir <ankura...@google.com>
Date: Wed, 2 Apr 2025 00:53:33 -0700
Subject: [PATCH] clang frontend crash with friend class declaration and
overloaded operator ==
---
clang/docs/ReleaseNotes.rst | 1 +
clang/lib/Sema/SemaDeclCXX.cpp | 3 +--
.../class/class.compare/class.compare.default/p1.cpp | 12 ++++++++++++
3 files changed, 14 insertions(+), 2 deletions(-)
diff --git a/clang/docs/ReleaseNotes.rst b/clang/docs/ReleaseNotes.rst
index daad01919ecd4..431ae0863d9e4 100644
--- a/clang/docs/ReleaseNotes.rst
+++ b/clang/docs/ReleaseNotes.rst
@@ -342,6 +342,7 @@ Bug Fixes to Attribute Support
Bug Fixes to C++ Support
^^^^^^^^^^^^^^^^^^^^^^^^
+- Clang Now Supports Implicitly-Defined Comparison Operators for
Friend-Declarations
- Clang now diagnoses copy constructors taking the class by value in template
instantiations. (#GH130866)
- Clang is now better at keeping track of friend function template instance
contexts. (#GH55509)
- Clang now prints the correct instantiation context for diagnostics suppressed
diff --git a/clang/lib/Sema/SemaDeclCXX.cpp b/clang/lib/Sema/SemaDeclCXX.cpp
index 676d53a1f4b45..d1516860dfe71 100644
--- a/clang/lib/Sema/SemaDeclCXX.cpp
+++ b/clang/lib/Sema/SemaDeclCXX.cpp
@@ -9037,8 +9037,7 @@ bool Sema::CheckExplicitlyDefaultedComparison(Scope *S,
FunctionDecl *FD,
return true;
if (llvm::none_of(RD->friends(), [&](const FriendDecl *F) {
- return FD->getCanonicalDecl() ==
- F->getFriendDecl()->getCanonicalDecl();
+ return declaresSameEntity(F->getFriendDecl(), FD);
})) {
Diag(FD->getLocation(), diag::err_defaulted_comparison_not_friend)
<< int(DCK) << int(0) << RD;
diff --git a/clang/test/CXX/class/class.compare/class.compare.default/p1.cpp
b/clang/test/CXX/class/class.compare/class.compare.default/p1.cpp
index a195e0548152d..5db4f05da552c 100644
--- a/clang/test/CXX/class/class.compare/class.compare.default/p1.cpp
+++ b/clang/test/CXX/class/class.compare/class.compare.default/p1.cpp
@@ -285,3 +285,15 @@ struct j {
};
bool j::operator==(const j &) const = default;
}
+
+namespace evil2 {
+ struct k {
+ };
+
+ struct l {
+ friend bool operator==(const l& a, const l& b);
+ friend class k;
+ };
+
+ bool operator==(const l& a, const l& b) = default;
+}
\ No newline at end of file
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