1; RUN: opt -passes=loop-vectorize -force-vector-width=4 -S -o - < %s | FileCheck %s 2%arrayt = type [64 x i32] 3 4@v_146 = external global %arrayt, align 1 5 6; Since the program has well defined behavior, it should not introduce store poison 7; CHECK: vector.ph: 8; CHECK-NEXT: br label %vector.body 9; CHECK: vector.body: 10; CHECK: store <4 x i32> zeroinitializer, 11; CHECK: br i1 %{{.*}}, label %middle.block, label %vector.body 12 13define void @foo() { 14entry: 15 br label %for.cond 16 17for.cond: ; preds = %cond.end, %entry 18 %storemerge = phi i16 [ 0, %entry ], [ %inc, %cond.end ] 19 %cmp = icmp slt i16 %storemerge, 15 20 br i1 %cmp, label %for.body, label %for.end 21 22for.body: ; preds = %for.cond 23 br i1 true, label %cond.false, label %land.rhs 24 25land.rhs: ; preds = %for.body 26 br i1 poison, label %cond.end, label %cond.false 27 28cond.false: ; preds = %for.body, %land.rhs 29 br label %cond.end 30 31cond.end: ; preds = %land.rhs, %cond.false 32 %cond = phi i32 [ 0, %cond.false ], [ 1, %land.rhs ] 33 %arrayidx = getelementptr inbounds %arrayt, ptr @v_146, i16 0, i16 %storemerge 34 store i32 %cond, ptr %arrayidx, align 1 35 %inc = add nsw i16 %storemerge, 1 36 br label %for.cond 37 38for.end: ; preds = %for.cond 39 ret void 40} 41