Imported Upstream version 5.18.0.225

Former-commit-id: 10196d987d5fc5564b9d3b33b1fdf13190f4d0b5

external/llvm/test/Transforms/GlobalDCE/2002-08-17-FunctionDGE.ll

@@ -0,0 +1,18 @@
+; Make sure that functions are removed successfully if they are referred to by
+; a global that is dead.  Make sure any globals they refer to die as well.
+
+; RUN: opt < %s -globaldce -S | FileCheck %s
+
+; CHECK-NOT: foo
+;; Unused, kills %foo
+@b = internal global i32 ()* @foo               ; <i32 ()**> [#uses=0]
+
+;; Should die when function %foo is killed
+@foo.upgrd.1 = internal global i32 7            ; <i32*> [#uses=1]
+
+ ;; dies when %b dies.
+define internal i32 @foo() {
+        %ret = load i32, i32* @foo.upgrd.1           ; <i32> [#uses=1]
+        ret i32 %ret
+}
+