================
@@ -0,0 +1,25 @@
+// RUN: %clang_cc1 -verify=good -pedantic -Wall -std=c2y %s
+// RUN: %clang_cc1 -verify=compat,expected -pedantic -Wall -Wpre-c2y-compat
-std=c2y %s
+// RUN: %clang_cc1 -verify=ped,expected -pedantic -Wall -std=c23 %s
+// RUN: %clang_cc1 -verify=ped,expected -pedantic -Wall -std=c17 %s
+// good-no-diagnostics
+
+/* WG14 N3622: Clang 22
+ * Allow static local variables in extern inline functions
+ *
+ * This verifies that a constraint from previous standards is no longer
+ * triggered in C2y mode. The constraint is regarding static local
+ * variables in inline functions with external linkage.
+ */
+
+inline void func1(void) { // expected-note {{use 'static' to give inline
function 'func1' internal linkage}}
+ static int x = 0; /* ped-warning {{non-constant static local variable in
an inline function with external linkage is a C2y extension}}
+ compat-warning {{non-constant static local variable in
an inline function with external linkage is incompatible with standards before
C2y}}
+ */
+ (void)x;
+}
+
+inline void func2(void) {
----------------
yronglin wrote:
What does this test used for?
https://github.com/llvm/llvm-project/pull/167086
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