Merging upstream version 1.68.2+dfsg1.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 34 insertions, 0 deletions

diff --git a/tests/ui/statics/issue-91050-1.rs b/tests/ui/statics/issue-91050-1.rs
new file mode 100644
index 000000000..403a41462
--- /dev/null
+++ b/tests/ui/statics/issue-91050-1.rs
@@ -0,0 +1,34 @@
+// build-pass
+// 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*
+// bitcast instead of a GlobalVariable* that could access linkage/visibility.
+// In alt builds with LLVM assertions this would fail:
+//
+// rustc: /checkout/src/llvm-project/llvm/include/llvm/Support/Casting.h:269:
+// typename cast_retty<X, Y *>::ret_type llvm::cast(Y *) [X = llvm::GlobalValue, Y = llvm::Value]:
+// Assertion `isa<X>(Val) && "cast<Ty>() argument of incompatible type!"' failed.
+//
+// In regular builds, the bad cast was UB, like "Invalid LLVMRustVisibility value!"
+
+pub mod before {
+    #[no_mangle]
+    pub static GLOBAL1: [u8; 1] = [1];
+}
+
+pub mod inner {
+    extern "C" {
+        pub static GLOBAL1: u8;
+        pub static GLOBAL2: u8;
+    }
+
+    pub fn call() {
+        drop(unsafe { (GLOBAL1, GLOBAL2) });
+    }
+}
+
+pub mod after {
+    #[no_mangle]
+    pub static GLOBAL2: [u8; 1] = [2];
+}