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; RUN: opt < %s -loop-vectorize -force-vector-unroll=1 -force-vector-width=4 -dce
; Check that we don't fall into an infinite loop.
define void @test() nounwind {
entry:
br label %for.body
for.body:
%0 = phi i32 [ 1, %entry ], [ 0, %for.body ]
br label %for.body
}
define void @test2() nounwind {
entry:
br label %for.body
for.body: ; preds = %for.body, %entry
%indvars.iv47 = phi i64 [ 0, %entry ], [ %indvars.iv.next48, %for.body ]
%0 = phi i32 [ 1, %entry ], [ 0, %for.body ]
%indvars.iv.next48 = add i64 %indvars.iv47, 1
br i1 undef, label %for.end, label %for.body
for.end: ; preds = %for.body
unreachable
}
;PR14701
define void @start_model_rare() nounwind uwtable ssp {
entry:
br i1 undef, label %return, label %if.end
if.end: ; preds = %entry
br i1 undef, label %cond.false, label %cond.true
cond.true: ; preds = %if.end
unreachable
cond.false: ; preds = %if.end
br i1 undef, label %cond.false28, label %cond.true20
cond.true20: ; preds = %cond.false
unreachable
cond.false28: ; preds = %cond.false
br label %for.body40
for.body40: ; preds = %for.inc50, %cond.false28
%indvars.iv123 = phi i64 [ 3, %cond.false28 ], [ %indvars.iv.next124, %for.inc50 ]
%step.0121 = phi i32 [ 1, %cond.false28 ], [ %step.1, %for.inc50 ]
br i1 undef, label %if.then46, label %for.inc50
if.then46: ; preds = %for.body40
%inc47 = add nsw i32 %step.0121, 1
br label %for.inc50
for.inc50: ; preds = %if.then46, %for.body40
%k.1 = phi i32 [ undef, %for.body40 ], [ %inc47, %if.then46 ]
%step.1 = phi i32 [ %step.0121, %for.body40 ], [ %inc47, %if.then46 ]
%indvars.iv.next124 = add i64 %indvars.iv123, 1
%lftr.wideiv = trunc i64 %indvars.iv.next124 to i32
%exitcond = icmp eq i32 %lftr.wideiv, 256
br i1 %exitcond, label %for.end52, label %for.body40
for.end52: ; preds = %for.inc50
unreachable
return: ; preds = %entry
ret void
}
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