1; RUN: llc < %s -mtriple=s390x-linux-gnu -mcpu=z14 -prefetch-distance=20 \
2; RUN:   -loop-prefetch-writes -stop-after=loop-data-prefetch | FileCheck %s
3;
4; Check that for a load followed by a store to the same address gets a single
5; write prefetch.
6;
7; CHECK-LABEL: for.body
8; CHECK: call void @llvm.prefetch.p0i8(i8* %scevgep{{.*}}, i32 1, i32 3, i32 1
9; CHECK-not: call void @llvm.prefetch
10
11define void @fun(i32* nocapture %Src, i32* nocapture readonly %Dst) {
12entry:
13  br label %for.body
14
15for.body:
16  %indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next.9, %for.body ]
17  %arrayidx = getelementptr inbounds i32, i32* %Dst, i64 %indvars.iv
18  %0 = load i32, i32* %arrayidx, align 4
19  %a = add i32 %0, 128
20  store i32 %a, i32* %arrayidx, align 4
21  %indvars.iv.next.9 = add nuw nsw i64 %indvars.iv, 1600
22  %cmp.9 = icmp ult i64 %indvars.iv.next.9, 11200
23  br i1 %cmp.9, label %for.body, label %for.cond.cleanup
24
25for.cond.cleanup:
26  ret void
27}
28
29