NiccoloN
909c4acfdd
Validate Operations / validate-operations (push) Has been cancelled
remove Spatial many ops in favor of tensor ops like in pim
287 lines
12 KiB
C++
287 lines
12 KiB
C++
#include "mlir/Dialect/Arith/IR/Arith.h"
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#include "../Common.hpp"
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#include "../Patterns.hpp"
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#include "src/Accelerators/PIM/Common/PimCommon.hpp"
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#include "src/Accelerators/PIM/Dialect/Pim/PimOps.hpp"
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using namespace mlir;
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namespace onnx_mlir {
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namespace {
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static bool isSubviewContiguous(const StaticSubviewInfo& info) {
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if (llvm::any_of(info.strides, [](int64_t stride) { return stride != 1; }))
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return false;
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auto sizesAndShape = llvm::zip_equal(llvm::make_range(info.sizes.rbegin(), info.sizes.rend()),
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llvm::make_range(info.sourceShape.rbegin(), info.sourceShape.rend()));
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auto firstDifferentSize = std::find_if(sizesAndShape.begin(), sizesAndShape.end(), [&](auto sizeAndShape) -> bool {
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auto [size, dimension] = sizeAndShape;
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return size != dimension;
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});
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if (firstDifferentSize == sizesAndShape.end())
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return true;
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++firstDifferentSize;
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return std::all_of(firstDifferentSize, sizesAndShape.end(), [](auto sizeAndShape) {
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auto [size, _dimension] = sizeAndShape;
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return size == 1;
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});
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}
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static OpFoldResult addConstantOffset(OpFoldResult baseOffset, int64_t extraOffset, PatternRewriter& rewriter) {
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if (extraOffset == 0)
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return baseOffset;
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if (auto attr = dyn_cast<Attribute>(baseOffset)) {
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auto integerAttr = dyn_cast<IntegerAttr>(attr);
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assert(integerAttr && "expected integer offset attribute");
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return rewriter.getIndexAttr(integerAttr.getInt() + extraOffset);
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}
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auto value = cast<Value>(baseOffset);
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auto cst = arith::ConstantIndexOp::create(rewriter, value.getLoc(), extraOffset);
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return arith::AddIOp::create(rewriter, value.getLoc(), value, cst).getResult();
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}
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static Value buildSubviewChunk(const StaticSubviewInfo& info,
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ArrayRef<int64_t> outerIndices,
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Location loc,
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PatternRewriter& rewriter) {
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SmallVector<OpFoldResult> chunkOffsets;
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SmallVector<OpFoldResult> chunkSizes;
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SmallVector<OpFoldResult> chunkStrides;
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chunkOffsets.reserve(info.offsets.size());
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chunkSizes.reserve(info.sizes.size());
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chunkStrides.reserve(info.strides.size());
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for (size_t dim = 0; dim < info.sizes.size(); ++dim) {
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int64_t extraOffset = dim + 1 < info.sizes.size() ? outerIndices[dim] * info.strides[dim] : 0;
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chunkOffsets.push_back(addConstantOffset(info.offsets[dim], extraOffset, rewriter));
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chunkSizes.push_back(rewriter.getIndexAttr(dim + 1 < info.sizes.size() ? 1 : info.sizes.back()));
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chunkStrides.push_back(rewriter.getIndexAttr(info.strides[dim]));
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}
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return memref::SubViewOp::create(rewriter, loc, info.source, chunkOffsets, chunkSizes, chunkStrides);
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}
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template <typename CopyOp, typename CreateCopyOp>
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static LogicalResult rewriteSubviewCopyLikeOp(CopyOp copyOp,
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Value dst,
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Value src,
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int64_t dstOffset,
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int64_t srcOffset,
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int64_t size,
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PatternRewriter& rewriter,
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CreateCopyOp createCopyOp) {
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auto srcSubview = getStaticSubviewInfo(src);
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auto dstSubview = getStaticSubviewInfo(dst);
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const bool splitSrc = succeeded(srcSubview) && !isSubviewContiguous(*srcSubview);
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const bool splitDst = succeeded(dstSubview) && !isSubviewContiguous(*dstSubview);
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if (!splitSrc && !splitDst)
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return failure();
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auto sourceType = dyn_cast<MemRefType>(src.getType());
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auto dstType = dyn_cast<MemRefType>(dst.getType());
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if (!sourceType || !dstType || !sourceType.hasStaticShape() || !dstType.hasStaticShape())
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return failure();
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if (sourceType.getElementType() != dstType.getElementType())
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return failure();
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if (splitSrc && (srcOffset != 0 || llvm::any_of(srcSubview->strides, [](int64_t stride) { return stride != 1; })))
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return failure();
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if (splitDst && (dstOffset != 0 || llvm::any_of(dstSubview->strides, [](int64_t stride) { return stride != 1; })))
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return failure();
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ArrayRef<int64_t> copyShape = splitSrc ? ArrayRef<int64_t>(srcSubview->sizes) : ArrayRef<int64_t>(dstSubview->sizes);
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if (splitSrc && splitDst && copyShape != ArrayRef<int64_t>(dstSubview->sizes))
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return failure();
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const int64_t elementByteWidth = sourceType.getElementTypeBitWidth() / 8;
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if (elementByteWidth <= 0)
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return failure();
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const int64_t totalBytes = getNumElements(copyShape) * elementByteWidth;
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if (size != totalBytes)
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return failure();
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const int64_t sliceBytes = copyShape.back() * elementByteWidth;
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if (sliceBytes <= 0)
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return failure();
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SmallVector<int64_t> outerShape(copyShape.begin(), copyShape.end() - 1);
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auto outerStrides = computeRowMajorStrides(outerShape);
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const int64_t numSlices = outerShape.empty() ? 1 : getNumElements(outerShape);
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rewriter.setInsertionPoint(copyOp);
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for (int64_t linearIndex = 0; linearIndex < numSlices; ++linearIndex) {
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SmallVector<int64_t> outerIndices =
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outerShape.empty() ? SmallVector<int64_t> {} : delinearizeIndex(linearIndex, outerShape, outerStrides);
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Value chunkDst = splitDst ? buildSubviewChunk(*dstSubview, outerIndices, copyOp.getLoc(), rewriter) : dst;
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Value chunkSrc = splitSrc ? buildSubviewChunk(*srcSubview, outerIndices, copyOp.getLoc(), rewriter) : src;
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const int64_t srcByteOffset = splitSrc ? 0 : srcOffset + linearIndex * sliceBytes;
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const int64_t dstByteOffset = splitDst ? 0 : dstOffset + linearIndex * sliceBytes;
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createCopyOp(cast<MemRefType>(chunkDst.getType()), chunkDst, chunkSrc, dstByteOffset, srcByteOffset, sliceBytes);
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}
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return success();
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}
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// Splits core copies through subviews into contiguous copy chunks for codegen.
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struct RewriteCoreSubviewCopyPattern final : OpRewritePattern<pim::PimMemCopyOp> {
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using OpRewritePattern::OpRewritePattern;
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LogicalResult matchAndRewrite(pim::PimMemCopyOp copyOp, PatternRewriter& rewriter) const override {
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if (!copyOp->getParentOfType<pim::PimCoreOp>())
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return failure();
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auto status = rewriteSubviewCopyLikeOp(
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copyOp,
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copyOp.getTarget(),
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copyOp.getSource(),
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copyOp.getTargetOffset(),
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copyOp.getSourceOffset(),
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copyOp.getSize(),
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rewriter,
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[&](
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MemRefType resultType, Value dst, Value src, int64_t dstByteOffset, int64_t srcByteOffset, int64_t sliceBytes) {
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pim::PimMemCopyOp::create(rewriter,
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copyOp.getLoc(),
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resultType,
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dst,
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src,
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rewriter.getI32IntegerAttr(static_cast<int32_t>(dstByteOffset)),
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rewriter.getI32IntegerAttr(static_cast<int32_t>(srcByteOffset)),
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rewriter.getI32IntegerAttr(static_cast<int32_t>(sliceBytes)));
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});
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if (failed(status))
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return failure();
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rewriter.replaceOp(copyOp, copyOp.getTarget());
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return success();
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}
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};
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// Splits host-to-device subview loads into contiguous copy chunks.
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struct RewriteHostSubviewLoadPattern final : OpRewritePattern<pim::PimMemCopyHostToDevOp> {
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using OpRewritePattern::OpRewritePattern;
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LogicalResult matchAndRewrite(pim::PimMemCopyHostToDevOp copyOp, PatternRewriter& rewriter) const override {
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auto status = rewriteSubviewCopyLikeOp(
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copyOp,
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copyOp.getDeviceTarget(),
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copyOp.getHostSource(),
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copyOp.getDeviceTargetOffset(),
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copyOp.getHostSourceOffset(),
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copyOp.getSize(),
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rewriter,
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[&](
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MemRefType resultType, Value dst, Value src, int64_t dstByteOffset, int64_t srcByteOffset, int64_t sliceBytes) {
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pim::PimMemCopyHostToDevOp::create(rewriter,
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copyOp.getLoc(),
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resultType,
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dst,
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src,
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rewriter.getI32IntegerAttr(static_cast<int32_t>(dstByteOffset)),
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rewriter.getI32IntegerAttr(static_cast<int32_t>(srcByteOffset)),
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rewriter.getI32IntegerAttr(static_cast<int32_t>(sliceBytes)));
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});
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if (failed(status))
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return failure();
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rewriter.replaceOp(copyOp, copyOp.getDeviceTarget());
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return success();
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}
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};
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// Splits device-to-host subview stores into contiguous copy chunks.
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struct RewriteHostSubviewStorePattern final : OpRewritePattern<pim::PimMemCopyDevToHostOp> {
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using OpRewritePattern::OpRewritePattern;
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LogicalResult matchAndRewrite(pim::PimMemCopyDevToHostOp copyOp, PatternRewriter& rewriter) const override {
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auto status = rewriteSubviewCopyLikeOp(
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copyOp,
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copyOp.getHostTarget(),
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copyOp.getDeviceSource(),
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copyOp.getHostTargetOffset(),
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copyOp.getDeviceSourceOffset(),
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copyOp.getSize(),
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rewriter,
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[&](
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MemRefType resultType, Value dst, Value src, int64_t dstByteOffset, int64_t srcByteOffset, int64_t sliceBytes) {
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pim::PimMemCopyDevToHostOp::create(rewriter,
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copyOp.getLoc(),
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resultType,
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dst,
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src,
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rewriter.getI32IntegerAttr(static_cast<int32_t>(dstByteOffset)),
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rewriter.getI32IntegerAttr(static_cast<int32_t>(srcByteOffset)),
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rewriter.getI32IntegerAttr(static_cast<int32_t>(sliceBytes)));
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});
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if (failed(status))
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return failure();
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rewriter.replaceOp(copyOp, copyOp.getHostTarget());
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return success();
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}
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};
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// Folds constant subviews used as core weights into standalone globals.
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struct FoldConstantCoreSubviewPattern final : OpRewritePattern<memref::SubViewOp> {
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using OpRewritePattern::OpRewritePattern;
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LogicalResult matchAndRewrite(memref::SubViewOp subviewOp, PatternRewriter& rewriter) const override {
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if (subviewOp.use_empty())
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return failure();
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if (!llvm::all_of(subviewOp->getUsers(), [](Operation* user) { return isa<pim::PimCoreOp>(user); }))
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return failure();
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auto moduleOp = subviewOp->getParentOfType<ModuleOp>();
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if (!moduleOp)
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return failure();
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auto denseAttr = getDenseGlobalValue(moduleOp, stripMemRefCasts(subviewOp.getSource()));
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if (failed(denseAttr))
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return failure();
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auto subviewInfo = getStaticSubviewInfo(subviewOp.getResult());
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if (failed(subviewInfo))
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return failure();
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if (llvm::any_of(subviewInfo->strides, [](int64_t stride) { return stride != 1; }))
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return failure();
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auto staticOffsets = getStaticSubviewOffsets(*subviewInfo);
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if (failed(staticOffsets))
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return failure();
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auto elementType = cast<MemRefType>(subviewOp.getType()).getElementType();
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auto resultMemRefType =
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MemRefType::get(SmallVector<int64_t>(subviewInfo->sizes.begin(), subviewInfo->sizes.end()), elementType);
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auto foldedAttr = foldDenseSubview(*denseAttr, *staticOffsets, resultMemRefType.getShape());
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if (failed(foldedAttr))
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return failure();
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auto newGlobal =
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createFoldedGlobal(moduleOp, subviewOp.getLoc(), resultMemRefType, *foldedAttr, "pim_folded_subview");
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markWeightAlways(newGlobal);
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rewriter.setInsertionPoint(subviewOp);
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auto newGetGlobal =
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memref::GetGlobalOp::create(rewriter, subviewOp.getLoc(), resultMemRefType, newGlobal.getName());
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markWeightAlways(newGetGlobal);
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rewriter.replaceOp(subviewOp, newGetGlobal.getResult());
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return success();
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}
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};
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} // namespace
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void populateConstantFoldingSubviewPatterns(RewritePatternSet& patterns) {
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patterns.add<RewriteCoreSubviewCopyPattern,
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RewriteHostSubviewLoadPattern,
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RewriteHostSubviewStorePattern,
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FoldConstantCoreSubviewPattern>(patterns.getContext());
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}
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} // namespace onnx_mlir
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