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1; RUN: opt -passes=loop-vectorize -force-vector-width=4 -S -o - < %s | FileCheck %s2%arrayt = type [64 x i32]3 4@v_146 = external global %arrayt, align 15 6; Since the program has well defined behavior, it should not introduce store poison7; CHECK: vector.ph:8; CHECK-NEXT: br label %vector.body9; CHECK: vector.body:10; CHECK: store <4 x i32> zeroinitializer,11; CHECK: br i1 %{{.*}}, label %middle.block, label %vector.body12 13define void @foo() {14entry:15 br label %for.cond16 17for.cond: ; preds = %cond.end, %entry18 %storemerge = phi i16 [ 0, %entry ], [ %inc, %cond.end ]19 %cmp = icmp slt i16 %storemerge, 1520 br i1 %cmp, label %for.body, label %for.end21 22for.body: ; preds = %for.cond23 br i1 true, label %cond.false, label %land.rhs24 25land.rhs: ; preds = %for.body26 br i1 false, label %cond.end, label %cond.false27 28cond.false: ; preds = %for.body, %land.rhs29 br label %cond.end30 31cond.end: ; preds = %land.rhs, %cond.false32 %cond = phi i32 [ 0, %cond.false ], [ 1, %land.rhs ]33 %arrayidx = getelementptr inbounds %arrayt, ptr @v_146, i16 0, i16 %storemerge34 store i32 %cond, ptr %arrayidx, align 135 %inc = add nsw i16 %storemerge, 136 br label %for.cond37 38for.end: ; preds = %for.cond39 ret void40}41