1 ; This testcase was extracted from the gzip SPEC benchmark 2 ; 3 ; RUN: opt < %s -adce | FileCheck %s 4 5 @bk = external global i32 ; <i32*> [#uses=2] 6 @hufts = external global i32 ; <i32*> [#uses=1] 7 8 define i32 @inflate() { 9 bb0: 10 br label %bb2 11 12 bb2: ; preds = %bb6, %bb0 13 %reg128 = phi i32 [ %reg130, %bb6 ], [ 0, %bb0 ] ; <i32> [#uses=2] 14 br i1 true, label %bb4, label %bb3 15 16 bb3: ; preds = %bb2 17 br label %UnifiedExitNode 18 19 ; CHECK-NOT: bb4: 20 ; CHECK-NOT: bb5: 21 bb4: ; preds = %bb2 22 %reg117 = load i32, i32* @hufts ; <i32> [#uses=2] 23 %cond241 = icmp ule i32 %reg117, %reg128 ; <i1> [#uses=1] 24 br i1 %cond241, label %bb6, label %bb5 25 26 bb5: ; preds = %bb4 27 br label %bb6 28 29 bb6: ; preds = %bb5, %bb4 30 %reg130 = phi i32 [ %reg117, %bb5 ], [ %reg128, %bb4 ] ; <i32> [#uses=1] 31 br i1 false, label %bb2, label %bb7 32 33 bb7: ; preds = %bb6 34 %reg126 = load i32, i32* @bk ; <i32> [#uses=1] 35 %cond247 = icmp ule i32 %reg126, 7 ; <i1> [#uses=1] 36 br i1 %cond247, label %bb9, label %bb8 37 38 bb8: ; preds = %bb8, %bb7 39 %reg119 = load i32, i32* @bk ; <i32> [#uses=1] 40 %cond256 = icmp ugt i32 %reg119, 7 ; <i1> [#uses=1] 41 br i1 %cond256, label %bb8, label %bb9 42 43 bb9: ; preds = %bb8, %bb7 44 br label %UnifiedExitNode 45 46 UnifiedExitNode: ; preds = %bb9, %bb3 47 %UnifiedRetVal = phi i32 [ 7, %bb3 ], [ 0, %bb9 ] ; <i32> [#uses=1] 48 ret i32 %UnifiedRetVal 49 } 50 51
