80 lines
2.7 KiB
C++
80 lines
2.7 KiB
C++
//===- TargetToTargetFeatures.cpp - extract features from TargetMachine ---===//
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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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#include "mlir/Target/LLVMIR/Transforms/Passes.h"
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#include "mlir/Target/LLVMIR/Transforms/TargetUtils.h"
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#include "llvm/ADT/SmallVectorExtras.h"
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#include "mlir/Dialect/DLTI/DLTI.h"
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#include "mlir/Dialect/LLVMIR/LLVMDialect.h"
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#include "mlir/Target/LLVMIR/Import.h"
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#include "llvm/MC/MCSubtargetInfo.h"
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namespace mlir {
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namespace LLVM {
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#define GEN_PASS_DEF_LLVMTARGETTOTARGETFEATURES
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#include "mlir/Target/LLVMIR/Transforms/Passes.h.inc"
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} // namespace LLVM
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} // namespace mlir
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using namespace mlir;
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struct TargetToTargetFeaturesPass
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: public LLVM::impl::LLVMTargetToTargetFeaturesBase<
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TargetToTargetFeaturesPass> {
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using LLVM::impl::LLVMTargetToTargetFeaturesBase<
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TargetToTargetFeaturesPass>::LLVMTargetToTargetFeaturesBase;
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void runOnOperation() override {
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Operation *op = getOperation();
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if (initializeLLVMTargets)
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LLVM::detail::initializeBackendsOnce();
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auto targetAttr = op->getAttrOfType<LLVM::TargetAttr>(
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LLVM::LLVMDialect::getTargetAttrName());
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if (!targetAttr) {
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op->emitError() << "no LLVM::TargetAttr attribute at key \""
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<< LLVM::LLVMDialect::getTargetAttrName() << "\"";
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return signalPassFailure();
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}
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FailureOr<std::unique_ptr<llvm::TargetMachine>> targetMachine =
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LLVM::detail::getTargetMachine(targetAttr);
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if (failed(targetMachine)) {
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op->emitError() << "failed to obtain llvm::TargetMachine for "
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<< targetAttr;
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return signalPassFailure();
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}
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llvm::MCSubtargetInfo const *subTargetInfo =
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(*targetMachine)->getMCSubtargetInfo();
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const std::vector<llvm::SubtargetFeatureKV> enabledFeatures =
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subTargetInfo->getEnabledProcessorFeatures();
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auto plussedFeatures = llvm::map_to_vector(
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enabledFeatures, [](llvm::SubtargetFeatureKV feature) {
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return std::string("+") + feature.Key;
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});
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auto plussedFeaturesRefs = llvm::map_to_vector(
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plussedFeatures, [](auto &it) { return StringRef(it.c_str()); });
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auto fullTargetFeaturesAttr =
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LLVM::TargetFeaturesAttr::get(&getContext(), plussedFeaturesRefs);
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auto updatedTargetAttr =
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LLVM::TargetAttr::get(&getContext(), targetAttr.getTriple(),
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targetAttr.getChip(), fullTargetFeaturesAttr);
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op->setAttr(LLVM::LLVMDialect::getTargetAttrName(), updatedTargetAttr);
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}
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};
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