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; RUN: opt -passes=loop-vectorize -force-vector-width=4 -S -o - < %s | FileCheck %s
%arrayt = type [64 x i32]
@v_146 = external global %arrayt, align 1
; Since the program has well defined behavior, it should not introduce store poison
; CHECK: vector.ph:
; CHECK-NEXT: br label %vector.body
; CHECK: vector.body:
; CHECK: store <4 x i32> zeroinitializer,
; CHECK: br i1 %{{.*}}, label %middle.block, label %vector.body
define void @foo() {
entry:
br label %for.cond
for.cond: ; preds = %cond.end, %entry
%storemerge = phi i16 [ 0, %entry ], [ %inc, %cond.end ]
%cmp = icmp slt i16 %storemerge, 15
br i1 %cmp, label %for.body, label %for.end
for.body: ; preds = %for.cond
br i1 true, label %cond.false, label %land.rhs
land.rhs: ; preds = %for.body
br i1 poison, label %cond.end, label %cond.false
cond.false: ; preds = %for.body, %land.rhs
br label %cond.end
cond.end: ; preds = %land.rhs, %cond.false
%cond = phi i32 [ 0, %cond.false ], [ 1, %land.rhs ]
%arrayidx = getelementptr inbounds %arrayt, ptr @v_146, i16 0, i16 %storemerge
store i32 %cond, ptr %arrayidx, align 1
%inc = add nsw i16 %storemerge, 1
br label %for.cond
for.end: ; preds = %for.cond
ret void
}
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