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.p0(ptr %scevgep, i32 1, i32 3, i32 1 9; CHECK-not: call void @llvm.prefetch 10 11define void @fun(ptr nocapture %Src, ptr 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, ptr %Dst, i64 %indvars.iv 18 %0 = load i32, ptr %arrayidx, align 4 19 %a = add i32 %0, 128 20 store i32 %a, ptr %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