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