1 ; RUN: llc < %s -mtriple=s390x-linux-gnu -mcpu=z14 -prefetch-distance=50 \
2 ; RUN: -loop-prefetch-writes -stop-after=loop-data-prefetch | FileCheck %s
4 ; Check that prefetches are emitted in a position that is executed each
5 ; iteration for each targeted memory instruction. The two stores in %true and
6 ; %false are within one cache line in memory, so they should get a single
7 ; prefetch in %for.body.
9 ; CHECK-LABEL: for.body
10 ; CHECK: call void @llvm.prefetch.p0(ptr {{.*}}, i32 0
11 ; CHECK: call void @llvm.prefetch.p0(ptr {{.*}}, i32 1
16 define void @fun(ptr nocapture %Src, ptr nocapture readonly %Dst) {
21 %indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next.9, %latch ]
22 %arrayidx = getelementptr inbounds i32, ptr %Dst, i64 %indvars.iv
23 %0 = load i32, ptr %arrayidx, align 4
24 %cmp = icmp sgt i32 %0, 0
25 br i1 %cmp, label %true, label %false
28 %arrayidx2 = getelementptr inbounds i32, ptr %Src, i64 %indvars.iv
29 store i32 %0, ptr %arrayidx2, align 4
33 %a = add i64 %indvars.iv, 8
34 %arrayidx3 = getelementptr inbounds i32, ptr %Src, i64 %a
35 store i32 %0, ptr %arrayidx3, align 4
39 %indvars.iv.next.9 = add nuw nsw i64 %indvars.iv, 1600
40 %cmp.9 = icmp ult i64 %indvars.iv.next.9, 11200
41 br i1 %cmp.9, label %for.body, label %for.cond.cleanup