--- /dev/null
+; RUN: opt < %s -loop-interchange -S | FileCheck %s
+;; Checks the order of the inner phi nodes does not cause havoc.
+;; The inner loop has a reduction into c. The IV is not the first phi.
+
+target datalayout = "e-m:e-p:32:32-i64:64-v128:64:128-a:0:32-n32-S64"
+target triple = "armv8--linux-gnueabihf"
+
+; Function Attrs: norecurse nounwind
+define void @test(i32 %T, [90 x i32]* noalias nocapture %C, i16* noalias nocapture readonly %A, i16* noalias nocapture readonly %B) local_unnamed_addr #0 {
+entry:
+ %cmp45 = icmp sgt i32 %T, 0
+ br i1 %cmp45, label %for.body3.lr.ph.preheader, label %for.end21
+
+for.body3.lr.ph.preheader: ; preds = %entry
+ br label %for.body3.lr.ph
+
+for.body3.lr.ph: ; preds = %for.body3.lr.ph.preheader, %for.inc19
+ %i.046 = phi i32 [ %inc20, %for.inc19 ], [ 0, %for.body3.lr.ph.preheader ]
+ %mul = mul nsw i32 %i.046, %T
+ br label %for.body6.lr.ph
+
+for.body6.lr.ph: ; preds = %for.inc16, %for.body3.lr.ph
+ %j.043 = phi i32 [ 0, %for.body3.lr.ph ], [ %inc17, %for.inc16 ]
+ %arrayidx14 = getelementptr inbounds [90 x i32], [90 x i32]* %C, i32 %i.046, i32 %j.043
+ %arrayidx14.promoted = load i32, i32* %arrayidx14, align 4
+ br label %for.body6
+
+for.body6: ; preds = %for.body6, %for.body6.lr.ph
+ %add1541 = phi i32 [ %arrayidx14.promoted, %for.body6.lr.ph ], [ %add15, %for.body6 ]
+ %k.040 = phi i32 [ 0, %for.body6.lr.ph ], [ %inc, %for.body6 ]
+ %add = add nsw i32 %k.040, %mul
+ %arrayidx = getelementptr inbounds i16, i16* %A, i32 %add
+ %0 = load i16, i16* %arrayidx, align 2
+ %conv = sext i16 %0 to i32
+ %mul7 = mul nsw i32 %k.040, %T
+ %add8 = add nsw i32 %mul7, %j.043
+ %arrayidx9 = getelementptr inbounds i16, i16* %B, i32 %add8
+ %1 = load i16, i16* %arrayidx9, align 2
+ %conv10 = sext i16 %1 to i32
+ %mul11 = mul nsw i32 %conv10, %conv
+ %add15 = add nsw i32 %mul11, %add1541
+ %inc = add nuw nsw i32 %k.040, 1
+ %exitcond = icmp eq i32 %inc, %T
+ br i1 %exitcond, label %for.inc16, label %for.body6
+
+for.inc16: ; preds = %for.body6
+ %add15.lcssa = phi i32 [ %add15, %for.body6 ]
+ store i32 %add15.lcssa, i32* %arrayidx14, align 4
+ %inc17 = add nuw nsw i32 %j.043, 1
+ %exitcond47 = icmp eq i32 %inc17, %T
+ br i1 %exitcond47, label %for.inc19, label %for.body6.lr.ph
+
+for.inc19: ; preds = %for.inc16
+ %inc20 = add nuw nsw i32 %i.046, 1
+ %exitcond48 = icmp eq i32 %inc20, %T
+ br i1 %exitcond48, label %for.end21.loopexit, label %for.body3.lr.ph
+
+for.end21.loopexit: ; preds = %for.inc19
+ br label %for.end21
+
+for.end21: ; preds = %for.end21.loopexit, %entry
+ ret void
+}
+
+
+; CHECK-LABEL: test
+; CHECK: entry:
+; CHECK: br i1 %cmp45, label %for.body6.preheader, label %for.end21
+; CHECK: for.body3.lr.ph.preheader:
+; CHECK: br label %for.body3.lr.ph
+; CHECK: for.body3.lr.ph:
+; CHECK: br label %for.body6.lr.ph.preheader
+; CHECK: for.body6.lr.ph.preheader:
+; CHECK: br label %for.body6.lr.ph
+; CHECK: for.body6.lr.ph:
+; CHECK: br label %for.body6.split1
+; CHECK: for.body6.preheader:
+; CHECK: br label %for.body6
+; CHECK: for.body6:
+; CHECK: br label %for.body3.lr.ph.preheader
+; CHECK: for.body6.split1:
+; CHECK: br label %for.inc16
+; CHECK: for.body6.split:
+; CHECK: add nuw nsw i32 %k.040, 1
+; CHECK: br i1 %exitcond, label %for.end21.loopexit, label %for.body6
+; CHECK: for.inc16:
+; CHECK: br i1 %exitcond47, label %for.inc19, label %for.body6.lr.ph
+; CHECK: for.inc19:
+; CHECK: br i1 %exitcond48, label %for.body6.split, label %for.body3.lr.ph
+; CHECK: for.end21: