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58 lines
819 B
LLVM
58 lines
819 B
LLVM
; RUN: llvm-upgrade < %s | llvm-as | llvm-dis > %t1.ll
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; RUN: llvm-as %t1.ll -o - | llvm-dis > %t2.ll
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; RUN: diff %t1.ll %t2.ll
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implementation
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;; This is an irreducible flow graph
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void "irreducible"(bool %cond)
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begin
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br bool %cond, label %X, label %Y
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X:
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br label %Y
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Y:
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br label %X
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end
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;; This is a pair of loops that share the same header
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void "sharedheader"(bool %cond)
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begin
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br label %A
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A:
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br bool %cond, label %X, label %Y
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X:
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br label %A
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Y:
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br label %A
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end
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;; This is a simple nested loop
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void "nested"(bool %cond1, bool %cond2, bool %cond3)
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begin
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br label %Loop1
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Loop1:
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br label %Loop2
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Loop2:
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br label %Loop3
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Loop3:
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br bool %cond3, label %Loop3, label %L3Exit
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L3Exit:
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br bool %cond2, label %Loop2, label %L2Exit
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L2Exit:
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br bool %cond1, label %Loop1, label %L1Exit
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L1Exit:
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ret void
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end
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