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AArch64: Add support for instruction prefetch intrinsic
Instruction prefetch is not implemented for AArch64, it is incorrectly translated into data prefetch instruction. Differential Revision: http://reviews.llvm.org/D4777 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@214860 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -1334,8 +1334,7 @@ static SDValue LowerPREFETCH(SDValue Op, SelectionDAG &DAG) {
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SDLoc DL(Op);
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unsigned IsWrite = cast<ConstantSDNode>(Op.getOperand(2))->getZExtValue();
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unsigned Locality = cast<ConstantSDNode>(Op.getOperand(3))->getZExtValue();
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// The data thing is not used.
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// unsigned isData = cast<ConstantSDNode>(Op.getOperand(4))->getZExtValue();
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unsigned IsData = cast<ConstantSDNode>(Op.getOperand(4))->getZExtValue();
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bool IsStream = !Locality;
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// When the locality number is set
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@ -1350,6 +1349,7 @@ static SDValue LowerPREFETCH(SDValue Op, SelectionDAG &DAG) {
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// built the mask value encoding the expected behavior.
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unsigned PrfOp = (IsWrite << 4) | // Load/Store bit
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(!IsData << 3) | // IsDataCache bit
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(Locality << 1) | // Cache level bits
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(unsigned)IsStream; // Stream bit
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return DAG.getNode(AArch64ISD::PREFETCH, DL, MVT::Other, Op.getOperand(0),
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@ -17,6 +17,15 @@ entry:
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; CHECK: prfum pldl1keep
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call void @llvm.prefetch(i8* %tmp, i32 0, i32 3, i32 1)
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; CHECK: prfum plil1strm
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call void @llvm.prefetch(i8* %tmp, i32 0, i32 0, i32 0)
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; CHECK: prfum plil3keep
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call void @llvm.prefetch(i8* %tmp, i32 0, i32 1, i32 0)
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; CHECK: prfum plil2keep
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call void @llvm.prefetch(i8* %tmp, i32 0, i32 2, i32 0)
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; CHECK: prfum plil1keep
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call void @llvm.prefetch(i8* %tmp, i32 0, i32 3, i32 0)
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; CHECK: prfum pstl1strm
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call void @llvm.prefetch(i8* %tmp, i32 1, i32 0, i32 1)
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; CHECK: prfum pstl3keep
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@ -57,26 +66,52 @@ entry:
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%arrayidx12 = getelementptr inbounds i32* %tmp10, i64 %idxprom
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%tmp11 = bitcast i32* %arrayidx12 to i8*
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; CHECK: prfm pstl1strm
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call void @llvm.prefetch(i8* %tmp11, i32 1, i32 0, i32 1)
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; CHECK: prfm plil1strm
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call void @llvm.prefetch(i8* %tmp11, i32 0, i32 0, i32 0)
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%tmp12 = load i32** @a, align 8, !tbaa !3
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%arrayidx15 = getelementptr inbounds i32* %tmp12, i64 %idxprom
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%tmp13 = bitcast i32* %arrayidx15 to i8*
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%tmp13 = bitcast i32* %arrayidx3 to i8*
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; CHECK: prfm pstl3keep
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call void @llvm.prefetch(i8* %tmp13, i32 1, i32 1, i32 1)
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; CHECK: prfm plil3keep
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call void @llvm.prefetch(i8* %tmp13, i32 0, i32 1, i32 0)
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%tmp14 = load i32** @a, align 8, !tbaa !3
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%arrayidx18 = getelementptr inbounds i32* %tmp14, i64 %idxprom
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%tmp15 = bitcast i32* %arrayidx18 to i8*
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%tmp15 = bitcast i32* %arrayidx6 to i8*
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; CHECK: prfm pstl2keep
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call void @llvm.prefetch(i8* %tmp15, i32 1, i32 2, i32 1)
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; CHECK: prfm plil2keep
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call void @llvm.prefetch(i8* %tmp15, i32 0, i32 2, i32 0)
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%tmp16 = load i32** @a, align 8, !tbaa !3
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%arrayidx21 = getelementptr inbounds i32* %tmp16, i64 %idxprom
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%tmp17 = bitcast i32* %arrayidx21 to i8*
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%tmp17 = bitcast i32* %arrayidx9 to i8*
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; CHECK: prfm plil1keep
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call void @llvm.prefetch(i8* %tmp17, i32 0, i32 3, i32 0)
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%tmp18 = load i32** @a, align 8, !tbaa !3
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%arrayidx24 = getelementptr inbounds i32* %tmp18, i64 %idxprom
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%tmp19 = bitcast i32* %arrayidx12 to i8*
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; CHECK: prfm pstl1strm
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call void @llvm.prefetch(i8* %tmp19, i32 1, i32 0, i32 1)
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%tmp20 = load i32** @a, align 8, !tbaa !3
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%arrayidx27 = getelementptr inbounds i32* %tmp20, i64 %idxprom
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%tmp21 = bitcast i32* %arrayidx15 to i8*
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; CHECK: prfm pstl3keep
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call void @llvm.prefetch(i8* %tmp21, i32 1, i32 1, i32 1)
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%tmp22 = load i32** @a, align 8, !tbaa !3
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%arrayidx30 = getelementptr inbounds i32* %tmp22, i64 %idxprom
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%tmp23 = bitcast i32* %arrayidx18 to i8*
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; CHECK: prfm pstl2keep
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call void @llvm.prefetch(i8* %tmp23, i32 1, i32 2, i32 1)
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%tmp24 = load i32** @a, align 8, !tbaa !3
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%arrayidx33 = getelementptr inbounds i32* %tmp24, i64 %idxprom
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%tmp25 = bitcast i32* %arrayidx21 to i8*
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; CHECK: prfm pstl1keep
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call void @llvm.prefetch(i8* %tmp17, i32 1, i32 3, i32 1)
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call void @llvm.prefetch(i8* %tmp25, i32 1, i32 3, i32 1)
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ret void
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}
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