bb7:
ret void
}
+
+; A block can be "branched to" from another even if it is also reachable via
+; fallthrough from the other. This would normally be optimized away, so use
+; optnone to disable optimizations to test this case.
+
+; CHECK-LABEL: test13:
+; CHECK-NEXT: .local i32{{$}}
+; CHECK: block BB22_2{{$}}
+; CHECK: br_if $pop4, BB22_2{{$}}
+; CHECK-NEXT: return{{$}}
+; CHECK-NEXT: BB22_2:
+; CHECK: block BB22_4{{$}}
+; CHECK-NEXT: br_if $0, BB22_4{{$}}
+; CHECK: BB22_4:
+; CHECK: block BB22_5{{$}}
+; CHECK: br_if $pop6, BB22_5{{$}}
+; CHECK-NEXT: BB22_5:
+; CHECK-NEXT: unreachable{{$}}
+; OPT-LABEL: test13:
+; OPT-NEXT: .local i32{{$}}
+; OPT: block BB22_2{{$}}
+; OPT: br_if $pop4, BB22_2{{$}}
+; OPT-NEXT: return{{$}}
+; OPT-NEXT: BB22_2:
+; OPT: block BB22_4{{$}}
+; OPT-NEXT: br_if $0, BB22_4{{$}}
+; OPT: BB22_4:
+; OPT: block BB22_5{{$}}
+; OPT: br_if $pop6, BB22_5{{$}}
+; OPT-NEXT: BB22_5:
+; OPT-NEXT: unreachable{{$}}
+define void @test13() noinline optnone {
+bb:
+ br i1 undef, label %bb5, label %bb2
+bb1:
+ unreachable
+bb2:
+ br i1 undef, label %bb3, label %bb4
+bb3:
+ br label %bb4
+bb4:
+ %tmp = phi i1 [ false, %bb2 ], [ false, %bb3 ]
+ br i1 %tmp, label %bb1, label %bb1
+bb5:
+ ret void
+}