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[Kryo] Enable loop prefetcher.

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Differential Revision: http://reviews.llvm.org/D21535

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@273329 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Haicheng Wu 2016-06-21 22:47:56 +00:00
parent 1037ef2574
commit 1fb090e593
2 changed files with 55 additions and 0 deletions
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4
lib/Target/AArch64/AArch64Subtarget.cpp
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@ -70,6 +70,10 @@ void AArch64Subtarget::initializeProperties() {
case Kryo:
MaxInterleaveFactor = 4;
VectorInsertExtractBaseCost = 2;
CacheLineSize = 128;
PrefetchDistance = 740;
MinPrefetchStride = 1024;
MaxPrefetchIterationsAhead = 11;
break;
case Vulcan: break;
case CortexA35: break;

51
test/Transforms/LoopDataPrefetch/AArch64/kryo-large-stride.ll Normal file
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@ -0,0 +1,51 @@
; RUN: opt -mcpu=kryo -mtriple=aarch64-gnu-linux -loop-data-prefetch -max-prefetch-iters-ahead=1000 -S < %s | FileCheck %s --check-prefix=LARGE_PREFETCH --check-prefix=ALL
; RUN: opt -mcpu=kryo -mtriple=aarch64-gnu-linux -loop-data-prefetch -S < %s | FileCheck %s --check-prefix=NO_LARGE_PREFETCH --check-prefix=ALL
target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-n32:64-S128"
; ALL-LABEL: @small_stride(
define void @small_stride(double* nocapture %a, double* nocapture readonly %b) {
entry:
br label %for.body
; ALL: for.body:
for.body: ; preds = %for.body, %entry
%indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next, %for.body ]
%arrayidx = getelementptr inbounds double, double* %b, i64 %indvars.iv
; ALL-NOT: call void @llvm.prefetch
%0 = load double, double* %arrayidx, align 8
%add = fadd double %0, 1.000000e+00
%arrayidx2 = getelementptr inbounds double, double* %a, i64 %indvars.iv
store double %add, double* %arrayidx2, align 8
%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
%exitcond = icmp eq i64 %indvars.iv.next, 1600
br i1 %exitcond, label %for.end, label %for.body
; ALL: for.end:
for.end: ; preds = %for.body
ret void
}
; ALL-LABEL: @large_stride(
define void @large_stride(double* nocapture %a, double* nocapture readonly %b) {
entry:
br label %for.body
; ALL: for.body:
for.body: ; preds = %for.body, %entry
%indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next, %for.body ]
%arrayidx = getelementptr inbounds double, double* %b, i64 %indvars.iv
; LARGE_PREFETCH: call void @llvm.prefetch
; NO_LARGE_PREFETCH-NOT: call void @llvm.prefetch
%0 = load double, double* %arrayidx, align 8
%add = fadd double %0, 1.000000e+00
%arrayidx2 = getelementptr inbounds double, double* %a, i64 %indvars.iv
store double %add, double* %arrayidx2, align 8
%indvars.iv.next = add nuw nsw i64 %indvars.iv, 150
%exitcond = icmp eq i64 %indvars.iv.next, 160000
br i1 %exitcond, label %for.end, label %for.body
; ALL: for.end:
for.end: ; preds = %for.body
ret void
}