1; RUN: opt -loop-vectorize -force-vector-width=2 -S < %s
2;
3; Cleaned up version of fe_tools.all_dimensions.ll from PR36311.
4; Forcing VF=2 to trigger vector code gen
5;
6; This is a test case that let's vectorizer's code gen to modify CFG and get
7; DomTree out of date, such that an assert from SCEV would trigger if
8; reanalysis of SCEV happens subsequently. Once vector code gen starts,
9; vectorizer should not invoke recomputation of Analysis.
10
11$test = comdat any
12
13declare i32 @__gxx_personality_v0(...)
14
15; Function Attrs: uwtable
16define dso_local void @test() local_unnamed_addr #0 comdat align 2 personality i8* bitcast (i32 (...)* @__gxx_personality_v0 to i8*) {
17entry:
18  br label %for.body51
19
20for.body51:                                       ; preds = %for.body51, %entry
21  br i1 undef, label %for.body51, label %for.body89.lr.ph
22
23for.cond80.loopexit:                              ; preds = %for.body89
24  %inc94.lcssa = phi i32 [ %inc94, %for.body89 ]
25  br i1 undef, label %for.body89.lr.ph, label %nrvo.skipdtor.loopexit
26
27for.body89.lr.ph:                                 ; preds = %for.cond80.loopexit, %for.body51
28  %i79.0179 = phi i32 [ %add90, %for.cond80.loopexit ], [ 0, %for.body51 ]
29  %next_index.4178 = phi i32 [ %inc94.lcssa, %for.cond80.loopexit ], [ undef, %for.body51 ]
30  %add90 = add nuw i32 %i79.0179, 1
31  %mul91 = mul i32 %add90, undef
32  br label %for.body89
33
34for.body89:                                       ; preds = %for.body89, %for.body89.lr.ph
35  %j.0175 = phi i32 [ 0, %for.body89.lr.ph ], [ %add92, %for.body89 ]
36  %next_index.5174 = phi i32 [ %next_index.4178, %for.body89.lr.ph ], [ %inc94, %for.body89 ]
37  %add92 = add nuw i32 %j.0175, 1
38  %add93 = add i32 %add92, %mul91
39  %inc94 = add i32 %next_index.5174, 1
40  %conv95 = zext i32 %next_index.5174 to i64
41  %arrayidx.i160 = getelementptr inbounds i32, i32* undef, i64 %conv95
42  store i32 %add93, i32* %arrayidx.i160, align 4
43;, !tbaa !1
44  %cmp87 = icmp ult i32 %add92, undef
45  br i1 %cmp87, label %for.body89, label %for.cond80.loopexit
46
47nrvo.skipdtor.loopexit:                           ; preds = %for.cond80.loopexit
48  ret void
49}
50