c940bfd7e6
This allows SDNodes to be validated against their expected type profiles and reduces the number of changes required to add a new node. Fix BR_CC/MEMCPY descriptions to match C++ code that creates the nodes (an error detected by the enabled verification functionality). Also remove redundant `SDNPOutGlue` on `BPFISD::MEMCPY`. Part of #119709.
46 lines
1.7 KiB
C++
46 lines
1.7 KiB
C++
//===-- BPFSelectionDAGInfo.cpp - BPF SelectionDAG Info -------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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// This file implements the BPFSelectionDAGInfo class.
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//
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//===----------------------------------------------------------------------===//
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#include "BPFSelectionDAGInfo.h"
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#include "BPFTargetMachine.h"
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#include "llvm/CodeGen/SelectionDAG.h"
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#define GET_SDNODE_DESC
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#include "BPFGenSDNodeInfo.inc"
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using namespace llvm;
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#define DEBUG_TYPE "bpf-selectiondag-info"
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BPFSelectionDAGInfo::BPFSelectionDAGInfo()
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: SelectionDAGGenTargetInfo(BPFGenSDNodeInfo) {}
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SDValue BPFSelectionDAGInfo::EmitTargetCodeForMemcpy(
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SelectionDAG &DAG, const SDLoc &dl, SDValue Chain, SDValue Dst, SDValue Src,
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SDValue Size, Align Alignment, bool isVolatile, bool AlwaysInline,
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MachinePointerInfo DstPtrInfo, MachinePointerInfo SrcPtrInfo) const {
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// Requires the copy size to be a constant.
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ConstantSDNode *ConstantSize = dyn_cast<ConstantSDNode>(Size);
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if (!ConstantSize)
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return SDValue();
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unsigned CopyLen = ConstantSize->getZExtValue();
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unsigned StoresNumEstimate = alignTo(CopyLen, Alignment) >> Log2(Alignment);
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// Impose the same copy length limit as MaxStoresPerMemcpy.
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if (StoresNumEstimate > getCommonMaxStoresPerMemFunc())
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return SDValue();
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return DAG.getNode(BPFISD::MEMCPY, dl, MVT::Other, Chain, Dst, Src,
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DAG.getConstant(CopyLen, dl, MVT::i64),
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DAG.getConstant(Alignment.value(), dl, MVT::i64));
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}
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