--- /dev/null
+; RUN: opt -loop-vectorize -force-vector-width=2 -S < %s
+;
+; Cleaned up version of fe_tools.all_dimensions.ll from PR36311.
+; Forcing VF=2 to trigger vector code gen
+;
+; This is a test case that let's vectorizer's code gen to modify CFG and get
+; DomTree out of date, such that an assert from SCEV would trigger if
+; reanalysis of SCEV happens subsequently. Once vector code gen starts,
+; vectorizer should not invoke recomputation of Analysis.
+
+$test = comdat any
+
+declare i32 @__gxx_personality_v0(...)
+
+; Function Attrs: uwtable
+define dso_local void @test() local_unnamed_addr #0 comdat align 2 personality i8* bitcast (i32 (...)* @__gxx_personality_v0 to i8*) {
+entry:
+ br label %for.body51
+
+for.body51: ; preds = %for.body51, %entry
+ br i1 undef, label %for.body51, label %for.body89.lr.ph
+
+for.cond80.loopexit: ; preds = %for.body89
+ %inc94.lcssa = phi i32 [ %inc94, %for.body89 ]
+ br i1 undef, label %for.body89.lr.ph, label %nrvo.skipdtor.loopexit
+
+for.body89.lr.ph: ; preds = %for.cond80.loopexit, %for.body51
+ %i79.0179 = phi i32 [ %add90, %for.cond80.loopexit ], [ 0, %for.body51 ]
+ %next_index.4178 = phi i32 [ %inc94.lcssa, %for.cond80.loopexit ], [ undef, %for.body51 ]
+ %add90 = add nuw i32 %i79.0179, 1
+ %mul91 = mul i32 %add90, undef
+ br label %for.body89
+
+for.body89: ; preds = %for.body89, %for.body89.lr.ph
+ %j.0175 = phi i32 [ 0, %for.body89.lr.ph ], [ %add92, %for.body89 ]
+ %next_index.5174 = phi i32 [ %next_index.4178, %for.body89.lr.ph ], [ %inc94, %for.body89 ]
+ %add92 = add nuw i32 %j.0175, 1
+ %add93 = add i32 %add92, %mul91
+ %inc94 = add i32 %next_index.5174, 1
+ %conv95 = zext i32 %next_index.5174 to i64
+ %arrayidx.i160 = getelementptr inbounds i32, i32* undef, i64 %conv95
+ store i32 %add93, i32* %arrayidx.i160, align 4
+;, !tbaa !1
+ %cmp87 = icmp ult i32 %add92, undef
+ br i1 %cmp87, label %for.body89, label %for.cond80.loopexit
+
+nrvo.skipdtor.loopexit: ; preds = %for.cond80.loopexit
+ ret void
+}