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; 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
}
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