Imported Upstream version 6.10.0.49

Former-commit-id: 1d6753294b2993e1fbf92de9366bb9544db4189b

external/llvm-project/llvm/test/CodeGen/X86/GC/badwriteproto.ll

@@ -0,0 +1,22 @@
+; RUN: not llvm-as < %s > /dev/null 2>&1
+
+	%list = type { i32, %list* }
+
+; This usage is invalid now; instead, objects must be bitcast to i8* for input
+; to the gc intrinsics.
+declare void @llvm.gcwrite(%list*, %list*, %list**)
+
+define %list* @cons(i32 %hd, %list* %tl) gc "example" {
+	%tmp = call i8* @gcalloc(i32 bitcast(%list* getelementptr(%list, %list* null, i32 1) to i32))
+	%cell = bitcast i8* %tmp to %list*
+	
+	%hd.ptr = getelementptr %list, %list* %cell, i32 0, i32 0
+	store i32 %hd, i32* %hd.ptr
+	
+	%tl.ptr = getelementptr %list, %list* %cell, i32 0, i32 0
+	call void @llvm.gcwrite(%list* %tl, %list* %cell, %list** %tl.ptr)
+	
+	ret %cell.2
+}
+
+declare i8* @gcalloc(i32)