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; RUN: opt < %s -loop-vectorize -debug -S -o /dev/null 2>&1 | FileCheck %s
; REQUIRES: asserts
; D40973
; Make sure LV legal bails out when the loop doesn't have a legal pre-header.
; CHECK: LV: Loop doesn't have a legal pre-header.
define void @inc(i32 %n, i8* %P) {
%1 = icmp sgt i32 %n, 0
br i1 %1, label %BB1, label %BB2
BB1:
indirectbr i8* %P, [label %.lr.ph]
BB2:
br label %.lr.ph
.lr.ph:
%indvars.iv = phi i32 [ %indvars.iv.next, %.lr.ph ], [ 0, %BB1 ], [ 0, %BB2 ]
%indvars.iv.next = add i32 %indvars.iv, 1
%exitcond = icmp eq i32 %indvars.iv.next, %n
br i1 %exitcond, label %._crit_edge, label %.lr.ph
._crit_edge:
ret void
}
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