1; This testcase was extracted from the gzip SPEC benchmark 2; 3; RUN: opt < %s -adce 4 5@bk = external global i32 ; <i32*> [#uses=2] 6@hufts = external global i32 ; <i32*> [#uses=1] 7 8define i32 @inflate() { 9bb0: 10 br label %bb2 11 12bb2: ; preds = %bb6, %bb0 13 %reg128 = phi i32 [ %reg130, %bb6 ], [ 0, %bb0 ] ; <i32> [#uses=2] 14 br i1 true, label %bb4, label %bb3 15 16bb3: ; preds = %bb2 17 br label %UnifiedExitNode 18 19bb4: ; preds = %bb2 20 %reg117 = load i32, i32* @hufts ; <i32> [#uses=2] 21 %cond241 = icmp ule i32 %reg117, %reg128 ; <i1> [#uses=1] 22 br i1 %cond241, label %bb6, label %bb5 23 24bb5: ; preds = %bb4 25 br label %bb6 26 27bb6: ; preds = %bb5, %bb4 28 %reg130 = phi i32 [ %reg117, %bb5 ], [ %reg128, %bb4 ] ; <i32> [#uses=1] 29 br i1 false, label %bb2, label %bb7 30 31bb7: ; preds = %bb6 32 %reg126 = load i32, i32* @bk ; <i32> [#uses=1] 33 %cond247 = icmp ule i32 %reg126, 7 ; <i1> [#uses=1] 34 br i1 %cond247, label %bb9, label %bb8 35 36bb8: ; preds = %bb8, %bb7 37 %reg119 = load i32, i32* @bk ; <i32> [#uses=1] 38 %cond256 = icmp ugt i32 %reg119, 7 ; <i1> [#uses=1] 39 br i1 %cond256, label %bb8, label %bb9 40 41bb9: ; preds = %bb8, %bb7 42 br label %UnifiedExitNode 43 44UnifiedExitNode: ; preds = %bb9, %bb3 45 %UnifiedRetVal = phi i32 [ 7, %bb3 ], [ 0, %bb9 ] ; <i32> [#uses=1] 46 ret i32 %UnifiedRetVal 47} 48 49