47 lines
1.4 KiB
LLVM
47 lines
1.4 KiB
LLVM
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; RUN: llc < %s -mtriple=s390x-linux-gnu -mcpu=z14 -prefetch-distance=50 \
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; RUN: -loop-prefetch-writes -stop-after=loop-data-prefetch | FileCheck %s
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;
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; Check that prefetches are emitted in a position that is executed each
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; iteration for each targeted memory instruction. The two stores in %true and
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; %false are within one cache line in memory, so they should get a single
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; prefetch in %for.body.
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;
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; CHECK-LABEL: for.body
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; CHECK: call void @llvm.prefetch.p0i8(i8* {{.*}}, i32 0
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; CHECK: call void @llvm.prefetch.p0i8(i8* {{.*}}, i32 1
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; CHECK-LABEL: true
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; CHECK-LABEL: false
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; CHECK-LABEL: latch
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define void @fun(i32* nocapture %Src, i32* nocapture readonly %Dst) {
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entry:
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br label %for.body
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for.body:
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%indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next.9, %latch ]
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%arrayidx = getelementptr inbounds i32, i32* %Dst, i64 %indvars.iv
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%0 = load i32, i32* %arrayidx, align 4
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%cmp = icmp sgt i32 %0, 0
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br i1 %cmp, label %true, label %false
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true:
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%arrayidx2 = getelementptr inbounds i32, i32* %Src, i64 %indvars.iv
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store i32 %0, i32* %arrayidx2, align 4
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br label %latch
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false:
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%a = add i64 %indvars.iv, 8
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%arrayidx3 = getelementptr inbounds i32, i32* %Src, i64 %a
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store i32 %0, i32* %arrayidx3, align 4
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br label %latch
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latch:
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%indvars.iv.next.9 = add nuw nsw i64 %indvars.iv, 1600
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%cmp.9 = icmp ult i64 %indvars.iv.next.9, 11200
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br i1 %cmp.9, label %for.body, label %for.cond.cleanup
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for.cond.cleanup:
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ret void
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}
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