| 1 | //===- LowerNontemporal.cpp -------------------------------------------===// |
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| 2 | // |
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| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
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| 4 | // See https://llvm.org/LICENSE.txt for license information. |
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| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
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| 6 | // |
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| 7 | //===----------------------------------------------------------------------===// |
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| 8 | // |
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| 9 | // Add nontemporal attributes to load and stores of variables marked as |
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| 10 | // nontemporal. |
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| 11 | // |
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| 12 | //===----------------------------------------------------------------------===// |
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| 13 | |
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| 14 | #include "flang/Optimizer/Dialect/FIRCG/CGOps.h" |
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| 15 | #include "flang/Optimizer/Dialect/FIROpsSupport.h" |
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| 16 | #include "flang/Optimizer/OpenMP/Passes.h" |
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| 17 | #include "mlir/Dialect/OpenMP/OpenMPDialect.h" |
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| 18 | #include "llvm/ADT/TypeSwitch.h" |
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| 19 | |
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| 20 | using namespace mlir; |
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| 21 | |
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| 22 | namespace flangomp { |
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| 23 | #define GEN_PASS_DEF_LOWERNONTEMPORALPASS |
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| 24 | #include "flang/Optimizer/OpenMP/Passes.h.inc" |
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| 25 | } // namespace flangomp |
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| 26 | |
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| 27 | namespace { |
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| 28 | class LowerNontemporalPass |
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| 29 | : public flangomp::impl::LowerNontemporalPassBase<LowerNontemporalPass> { |
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| 30 | void addNonTemporalAttr(omp::SimdOp simdOp) { |
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| 31 | if (simdOp.getNontemporalVars().empty()) |
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| 32 | return; |
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| 33 | |
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| 34 | std::function<mlir::Value(mlir::Value)> getBaseOperand = |
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| 35 | [&](mlir::Value operand) -> mlir::Value { |
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| 36 | auto *defOp = operand.getDefiningOp(); |
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| 37 | while (defOp) { |
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| 38 | llvm::TypeSwitch<Operation *>(defOp) |
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| 39 | .Case<fir::ArrayCoorOp, fir::cg::XArrayCoorOp, fir::LoadOp>( |
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| 40 | [&](auto op) { |
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| 41 | operand = op.getMemref(); |
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| 42 | defOp = operand.getDefiningOp(); |
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| 43 | }) |
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| 44 | .Case<fir::BoxAddrOp>([&](auto op) { |
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| 45 | operand = op.getVal(); |
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| 46 | defOp = operand.getDefiningOp(); |
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| 47 | }) |
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| 48 | .Default([&](auto op) { defOp = nullptr; }); |
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| 49 | } |
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| 50 | return operand; |
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| 51 | }; |
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| 52 | |
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| 53 | // walk through the operations and mark the load and store as nontemporal |
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| 54 | simdOp->walk([&](Operation *op) { |
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| 55 | mlir::Value operand = nullptr; |
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| 56 | |
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| 57 | if (auto loadOp = llvm::dyn_cast<fir::LoadOp>(op)) |
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| 58 | operand = loadOp.getMemref(); |
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| 59 | else if (auto storeOp = llvm::dyn_cast<fir::StoreOp>(op)) |
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| 60 | operand = storeOp.getMemref(); |
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| 61 | |
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| 62 | // Skip load and store operations involving boxes (allocatable or pointer |
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| 63 | // types). |
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| 64 | if (operand && !(fir::isAllocatableType(operand.getType()) || |
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| 65 | fir::isPointerType((operand.getType())))) { |
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| 66 | operand = getBaseOperand(operand); |
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| 67 | |
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| 68 | // TODO : Handling of nontemporal clause inside atomic construct |
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| 69 | if (llvm::is_contained(simdOp.getNontemporalVars(), operand)) { |
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| 70 | if (auto loadOp = llvm::dyn_cast<fir::LoadOp>(op)) |
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| 71 | loadOp.setNontemporal(true); |
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| 72 | else if (auto storeOp = llvm::dyn_cast<fir::StoreOp>(op)) |
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| 73 | storeOp.setNontemporal(true); |
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| 74 | } |
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| 75 | } |
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| 76 | }); |
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| 77 | } |
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| 78 | |
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| 79 | void runOnOperation() override { |
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| 80 | Operation *op = getOperation(); |
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| 81 | op->walk([&](omp::SimdOp simdOp) { addNonTemporalAttr(simdOp); }); |
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| 82 | } |
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| 83 | }; |
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| 84 | } // namespace |
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| 85 | |
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