File: phi-hang.ll

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llvm-toolchain-15 1%3A15.0.6-4
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; RUN: opt -S -passes=loop-vectorize < %s

; PR15384
define void @test1(i32 %arg) {
bb:
  br label %bb1

bb1:                                              ; preds = %bb5, %bb
  %tmp = phi i32 [ 1, %bb ], [ %tmp7, %bb5 ]
  %tmp2 = phi i32 [ %arg, %bb ], [ %tmp9, %bb5 ]
  br i1 true, label %bb5, label %bb3

bb3:                                              ; preds = %bb1
  br label %bb4

bb4:                                              ; preds = %bb3
  br label %bb5

bb5:                                              ; preds = %bb4, %bb1
  %tmp6 = phi i32 [ 0, %bb4 ], [ %tmp, %bb1 ]
  %tmp7 = phi i32 [ 0, %bb4 ], [ %tmp, %bb1 ]
  %tmp8 = phi i32 [ 0, %bb4 ], [ %tmp, %bb1 ]
  %tmp9 = add nsw i32 %tmp2, 1
  %tmp10 = icmp eq i32 %tmp9, 0
  br i1 %tmp10, label %bb11, label %bb1

bb11:                                             ; preds = %bb5
  ret void
}

; PR15748
define void @test2() {
bb:
  br label %bb1

bb1:                                              ; preds = %bb1, %bb
  %tmp = phi i32 [ 0, %bb ], [ %tmp5, %bb1 ]
  %tmp2 = phi i32 [ 0, %bb ], [ 1, %bb1 ]
  %tmp3 = phi i32 [ 0, %bb ], [ %tmp4, %bb1 ]
  %tmp4 = or i32 %tmp2, %tmp3
  %tmp5 = add nsw i32 %tmp, 1
  %tmp6 = icmp eq i32 %tmp5, 0
  br i1 %tmp6, label %bb7, label %bb1

bb7:                                              ; preds = %bb1
  ret void
}