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