Imported Upstream version 6.10.0.49

Former-commit-id: 1d6753294b2993e1fbf92de9366bb9544db4189b

external/llvm-project/llvm/test/Transforms/GlobalOpt/2006-11-01-ShrinkGlobalPhiCrash.ll

@@ -0,0 +1,33 @@
+; RUN: opt < %s -globalopt -disable-output
+
+        %struct._list = type { i32*, %struct._list* }
+        %struct._play = type { i32, i32*, %struct._list*, %struct._play* }
+@nrow = internal global i32 0           ; <i32*> [#uses=2]
+
+define void @make_play() {
+entry:
+        br label %cond_true16.i
+
+cond_true16.i:          ; preds = %cond_true16.i, %entry
+        %low.0.in.i.0 = phi i32* [ @nrow, %entry ], [ null, %cond_true16.i ]            ; <i32*> [#uses=1]
+        %low.0.i = load i32, i32* %low.0.in.i.0              ; <i32> [#uses=0]
+        br label %cond_true16.i
+}
+
+define void @make_wanted() {
+entry:
+        unreachable
+}
+
+define void @get_good_move() {
+entry:
+        ret void
+}
+
+define void @main() {
+entry:
+        store i32 8, i32* @nrow
+        tail call void @make_play( )
+        ret void
+}
+