| ; RUN: llc < %s -mtriple=s390x-linux-gnu -mcpu=z14 -prefetch-distance=20 \ |
| ; RUN: -loop-prefetch-writes -stop-after=loop-data-prefetch | FileCheck %s |
| ; |
| ; Check that for a load followed by a store to the same address gets a single |
| ; write prefetch. |
| ; |
| ; CHECK-LABEL: for.body |
| ; CHECK: call void @llvm.prefetch.p0i8(i8* %scevgep{{.*}}, i32 1, i32 3, i32 1 |
| ; CHECK-not: call void @llvm.prefetch |
| |
| define void @fun(i32* nocapture %Src, i32* nocapture readonly %Dst) { |
| entry: |
| br label %for.body |
| |
| for.body: |
| %indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next.9, %for.body ] |
| %arrayidx = getelementptr inbounds i32, i32* %Dst, i64 %indvars.iv |
| %0 = load i32, i32* %arrayidx, align 4 |
| %a = add i32 %0, 128 |
| store i32 %a, i32* %arrayidx, align 4 |
| %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 |
| } |
| |
