; This testcase was extracted from the gzip SPEC benchmark ; ; RUN: opt < %s -passes=adce | FileCheck %s @bk = external global i32 ; <ptr> [#uses=2] @hufts = external global i32 ; <ptr> [#uses=1] define i32 @inflate() { bb0: br label %bb2 bb2: ; preds = %bb6, %bb0 %reg128 = phi i32 [ %reg130, %bb6 ], [ 0, %bb0 ] ; <i32> [#uses=2] br i1 true, label %bb4, label %bb3 bb3: ; preds = %bb2 br label %UnifiedExitNode ; CHECK-NOT: bb4: ; CHECK-NOT: bb5: bb4: ; preds = %bb2 %reg117 = load i32, ptr @hufts ; <i32> [#uses=2] %cond241 = icmp ule i32 %reg117, %reg128 ; <i1> [#uses=1] br i1 %cond241, label %bb6, label %bb5 bb5: ; preds = %bb4 br label %bb6 bb6: ; preds = %bb5, %bb4 %reg130 = phi i32 [ %reg117, %bb5 ], [ %reg128, %bb4 ] ; <i32> [#uses=1] br i1 false, label %bb2, label %bb7 bb7: ; preds = %bb6 %reg126 = load i32, ptr @bk ; <i32> [#uses=1] %cond247 = icmp ule i32 %reg126, 7 ; <i1> [#uses=1] br i1 %cond247, label %bb9, label %bb8 bb8: ; preds = %bb8, %bb7 %reg119 = load i32, ptr @bk ; <i32> [#uses=1] %cond256 = icmp ugt i32 %reg119, 7 ; <i1> [#uses=1] br i1 %cond256, label %bb8, label %bb9 bb9: ; preds = %bb8, %bb7 br label %UnifiedExitNode UnifiedExitNode: ; preds = %bb9, %bb3 %UnifiedRetVal = phi i32 [ 7, %bb3 ], [ 0, %bb9 ] ; <i32> [#uses=1] ret i32 %UnifiedRetVal }