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; Test merging of blocks that only have PHI nodes in them
;
; RUN: llvm-upgrade < %s | llvm-as | opt -simplifycfg | llvm-dis | not grep 'N:'
;
int %test(bool %a, bool %b) {
br bool %a, label %M, label %O
O:
br bool %b, label %N, label %Q
Q:
br label %N
N:
%Wp = phi int [0, %O], [1, %Q]
; This block should be foldable into M
br label %M
M:
%W = phi int [%Wp, %N], [2, %0]
%R = add int %W, 1
ret int %R
}
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