forked from OSchip/llvm-project
28 lines
978 B
LLVM
28 lines
978 B
LLVM
; RUN: opt < %s -analyze -scalar-evolution | FileCheck %s
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; PR13228
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define void @f() nounwind uwtable readnone {
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entry:
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br label %for.cond
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for.cond: ; preds = %for.cond, %entry
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%c.0 = phi i8 [ 1, %entry ], [ 0, %for.cond ]
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%i.0 = phi i8 [ 0, %entry ], [ %inc, %for.cond ]
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%lnot = icmp eq i8 %i.0, 0
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%inc = add i8 %i.0, 1
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br i1 %lnot, label %for.cond, label %while.cond
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while.cond: ; preds = %while.body, %for.cond
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%b.2 = phi i8 [ %add, %while.body ], [ 0, %for.cond ]
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br i1 undef, label %while.end, label %while.body
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while.body: ; preds = %while.cond
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%add = add i8 %b.2, %c.0
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%tobool7 = icmp eq i8 %add, 0
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br i1 %tobool7, label %while.end, label %while.cond
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while.end: ; preds = %while.body, %while.cond
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ret void
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}
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;CHECK: Loop %while.cond: <multiple exits> Unpredictable backedge-taken count.
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