Add another test variant of issue-91050

Co-authored-by: Simonas Kazlauskas <git@kazlauskas.me>

src/test/ui/issues/issue-91050-1.rs

@@ -1,5 +1,5 @@
 // build-pass
-// compile-flags: --crate-type lib -Ccodegen-units=1
+// compile-flags: --crate-type=rlib --emit=llvm-ir -Cno-prepopulate-passes
 
 // This test declares globals by the same name with different types, which
 // caused problems because Module::getOrInsertGlobal would return a Constant*

src/test/ui/issues/issue-91050-2.rs

@@ -0,0 +1,24 @@
+// build-pass
+// compile-flags: --crate-type=rlib --emit=llvm-ir -Cno-prepopulate-passes
+
+// This is a variant of issue-91050-1.rs -- see there for an explanation.
+
+pub mod before {
+    extern "C" {
+        pub static GLOBAL1: [u8; 1];
+    }
+
+    pub unsafe fn do_something_with_array() -> u8 {
+        GLOBAL1[0]
+    }
+}
+
+pub mod inner {
+    extern "C" {
+        pub static GLOBAL1: u8;
+    }
+
+    pub unsafe fn call() -> u8 {
+        GLOBAL1 + 42
+    }
+}