--- /dev/null
+; RUN: opt -mtriple=thumbv8.1m.main -mattr=+mve.fp -loop-unroll -S < %s -o - | FileCheck %s
+
+; CHECK-LABEL: @loopfn
+; CHECK: vector.body:
+; CHECK: br i1 %7, label %middle.block, label %vector.body, !llvm.loop !0
+; CHECK: middle.block:
+; CHECK: br i1 %cmp.n, label %for.cond.cleanup, label %for.body.preheader13
+; CHECK: for.body:
+; CHECK: br i1 %exitcond, label %for.cond.cleanup.loopexit, label %for.body, !llvm.loop !2
+
+define void @loopfn(float* %s1, float* %s2, float* %d, i32 %n) {
+entry:
+ %cmp10 = icmp sgt i32 %n, 0
+ br i1 %cmp10, label %for.body.preheader, label %for.cond.cleanup
+
+for.body.preheader: ; preds = %entry
+ %min.iters.check = icmp ult i32 %n, 4
+ br i1 %min.iters.check, label %for.body.preheader13, label %vector.ph
+
+for.body.preheader13: ; preds = %middle.block, %for.body.preheader
+ %i.011.ph = phi i32 [ 0, %for.body.preheader ], [ %n.vec, %middle.block ]
+ br label %for.body
+
+vector.ph: ; preds = %for.body.preheader
+ %n.vec = and i32 %n, -4
+ br label %vector.body
+
+vector.body: ; preds = %vector.body, %vector.ph
+ %index = phi i32 [ 0, %vector.ph ], [ %index.next, %vector.body ]
+ %0 = getelementptr inbounds float, float* %s1, i32 %index
+ %1 = bitcast float* %0 to <4 x float>*
+ %wide.load = load <4 x float>, <4 x float>* %1, align 4
+ %2 = getelementptr inbounds float, float* %s2, i32 %index
+ %3 = bitcast float* %2 to <4 x float>*
+ %wide.load12 = load <4 x float>, <4 x float>* %3, align 4
+ %4 = fadd fast <4 x float> %wide.load12, %wide.load
+ %5 = getelementptr inbounds float, float* %d, i32 %index
+ %6 = bitcast float* %5 to <4 x float>*
+ store <4 x float> %4, <4 x float>* %6, align 4
+ %index.next = add i32 %index, 4
+ %7 = icmp eq i32 %index.next, %n.vec
+ br i1 %7, label %middle.block, label %vector.body, !llvm.loop !0
+
+middle.block: ; preds = %vector.body
+ %cmp.n = icmp eq i32 %n.vec, %n
+ br i1 %cmp.n, label %for.cond.cleanup, label %for.body.preheader13
+
+for.cond.cleanup.loopexit: ; preds = %for.body
+ br label %for.cond.cleanup
+
+for.cond.cleanup: ; preds = %for.cond.cleanup.loopexit, %middle.block, %entry
+ ret void
+
+for.body: ; preds = %for.body.preheader13, %for.body
+ %i.011 = phi i32 [ %add3, %for.body ], [ %i.011.ph, %for.body.preheader13 ]
+ %arrayidx = getelementptr inbounds float, float* %s1, i32 %i.011
+ %8 = load float, float* %arrayidx, align 4
+ %arrayidx1 = getelementptr inbounds float, float* %s2, i32 %i.011
+ %9 = load float, float* %arrayidx1, align 4
+ %add = fadd fast float %9, %8
+ %arrayidx2 = getelementptr inbounds float, float* %d, i32 %i.011
+ store float %add, float* %arrayidx2, align 4
+ %add3 = add nuw nsw i32 %i.011, 1
+ %exitcond = icmp eq i32 %add3, %n
+ br i1 %exitcond, label %for.cond.cleanup.loopexit, label %for.body, !llvm.loop !2
+}
+
+
+
+; CHECK-LABEL: @nested
+; CHECK: for.outer:
+; CHECK: br label %vector.body
+; CHECK: vector.body:
+; CHECK: br i1 %8, label %for.latch, label %vector.body, !llvm.loop !0
+; CHECK: for.latch:
+; CHECK: br i1 %exitcond34, label %for.cond.cleanup.loopexit, label %for.outer
+
+define void @nested(float* %s1, float* %s2, float* %d, i32 %n) {
+entry:
+ %cmp31 = icmp eq i32 %n, 0
+ br i1 %cmp31, label %for.cond.cleanup, label %for.outer.preheader
+
+for.outer.preheader: ; preds = %entry
+ %min.iters.check = icmp ult i32 %n, 4
+ %n.vec = and i32 %n, -4
+ %cmp.n = icmp eq i32 %n.vec, %n
+ br label %for.outer
+
+for.outer: ; preds = %for.outer.preheader, %for.cond1.for.cond.cleanup3_crit_edge.us
+ %j.032.us = phi i32 [ %inc.us, %for.latch ], [ 0, %for.outer.preheader ]
+ %mul.us = mul i32 %j.032.us, %n
+ br label %vector.body
+
+vector.body: ; preds = %for.outer, %vector.body
+ %index = phi i32 [ %index.next, %vector.body ], [ 0, %for.outer ]
+ %0 = add i32 %index, %mul.us
+ %1 = getelementptr inbounds float, float* %s1, i32 %0
+ %2 = bitcast float* %1 to <4 x float>*
+ %wide.load = load <4 x float>, <4 x float>* %2, align 4
+ %3 = getelementptr inbounds float, float* %s2, i32 %0
+ %4 = bitcast float* %3 to <4 x float>*
+ %wide.load35 = load <4 x float>, <4 x float>* %4, align 4
+ %5 = fadd fast <4 x float> %wide.load35, %wide.load
+ %6 = getelementptr inbounds float, float* %d, i32 %0
+ %7 = bitcast float* %6 to <4 x float>*
+ store <4 x float> %5, <4 x float>* %7, align 4
+ %index.next = add i32 %index, 4
+ %8 = icmp eq i32 %index.next, %n.vec
+ br i1 %8, label %for.latch, label %vector.body, !llvm.loop !0
+
+for.latch: ; preds = %vector.body, %for.outer
+ %i.030.us.ph = phi i32 [ %n.vec, %vector.body ]
+ %inc.us = add nuw i32 %j.032.us, 1
+ %exitcond34 = icmp eq i32 %inc.us, %n
+ br i1 %exitcond34, label %for.cond.cleanup.loopexit, label %for.outer
+
+for.cond.cleanup.loopexit:
+ br label %for.cond.cleanup
+
+for.cond.cleanup: ; preds = %for.cond1.for.cond.cleanup3_crit_edge.us, %entry
+ ret void
+}
+
+!0 = distinct !{!0, !1}
+!1 = !{!"llvm.loop.isvectorized", i32 1}
+!2 = distinct !{!2, !3, !1}
+!3 = !{!"llvm.loop.unroll.runtime.disable"}