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