a1710eb3cd
The LIT test cases were migrated with the script provided by Nikita Popov. No manual changes were made. Committed without review since no functional changes, after consultation with uweigand.
34 lines
1.3 KiB
LLVM
34 lines
1.3 KiB
LLVM
; RUN: llc < %s -mtriple=s390x-linux-gnu -mcpu=z14 -prefetch-distance=100 \
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; RUN: -stop-after=loop-data-prefetch | FileCheck %s -check-prefix=FAR-PREFETCH
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; RUN: llc < %s -mtriple=s390x-linux-gnu -mcpu=z14 -prefetch-distance=20 \
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; RUN: -stop-after=loop-data-prefetch | FileCheck %s -check-prefix=NEAR-PREFETCH
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;
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; Check that prefetches are not emitted when the known constant trip count of
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; the loop is smaller than the estimated "iterations ahead" of the prefetch.
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;
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; FAR-PREFETCH-LABEL: fun
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; FAR-PREFETCH-NOT: call void @llvm.prefetch
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; NEAR-PREFETCH-LABEL: fun
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; NEAR-PREFETCH: call void @llvm.prefetch
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define void @fun(ptr nocapture %Src, ptr nocapture readonly %Dst) {
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entry:
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br label %for.body
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for.cond.cleanup: ; preds = %for.body
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ret void
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for.body: ; preds = %for.body, %entry
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%indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next.9, %for.body ]
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%arrayidx = getelementptr inbounds i32, ptr %Dst, i64 %indvars.iv
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%0 = load i32, ptr %arrayidx, align 4
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%arrayidx2 = getelementptr inbounds i32, ptr %Src, i64 %indvars.iv
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store i32 %0, ptr %arrayidx2, align 4
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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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}
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