================
@@ -0,0 +1,32 @@
+// RUN: rm -fR %t
+// RUN: split-file %s %t
+// RUN: cd %t
+// RUN: %clang_cc1 -verify -std=c++20 -fskip-odr-check-in-gmf
-emit-header-unit -xc++-user-header bz0.h
+// RUN: %clang_cc1 -verify -std=c++20 -fskip-odr-check-in-gmf
-emit-header-unit -xc++-user-header bz1.h
+// RUN: %clang_cc1 -verify -std=c++20 -fskip-odr-check-in-gmf
-emit-header-unit -xc++-user-header -fmodule-file=bz0.pcm -fmodule-file=bz1.pcm
bz.cpp
+
+//--- compare
+template<typename _Tp>
+inline constexpr unsigned __cmp_cat_id = 1;
+
+template<typename... _Ts>
+constexpr auto __common_cmp_cat() {
+ (__cmp_cat_id<_Ts> | ...);
+}
+
+//--- bz0.h
+template <class T>
+int operator|(T, T);
+
+#include "compare"
----------------
dmpolukhin wrote:
I updated test case to be closer to the real issue with gcc libstdc++. The test
case is identical to
[polluted-operator.cppm](https://github.com/llvm/llvm-project/blob/main/clang/test/Modules/polluted-operator.cppm)
but with header units. Depending on include order it has ODR or not, it is
non-intentional violation that is hard to avoid at sale.
https://github.com/llvm/llvm-project/pull/111160
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