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