155380296a
The overloads accepting a string will be deprecated soon, similar to other functions in TargetRegistry.
73 lines
2.4 KiB
C++
73 lines
2.4 KiB
C++
//===- TargetUtils.cpp - utils for obtaining generic target backend 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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#include "mlir/Target/LLVMIR/Transforms/Passes.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/TargetRegistry.h"
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#include "llvm/Support/DebugLog.h"
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#include "llvm/Support/TargetSelect.h"
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#include "llvm/Target/TargetMachine.h"
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#define DEBUG_TYPE "mlir-llvm-target-utils"
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namespace mlir {
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namespace LLVM {
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namespace detail {
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void initializeBackendsOnce() {
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static const auto initOnce = [] {
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// Ensure that the targets, that LLVM has been configured to support,
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// are loaded into the TargetRegistry.
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llvm::InitializeAllTargets();
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llvm::InitializeAllTargetMCs();
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return true;
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}();
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(void)initOnce; // Dummy usage.
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}
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FailureOr<std::unique_ptr<llvm::TargetMachine>>
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getTargetMachine(mlir::LLVM::TargetAttrInterface attr) {
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StringRef triple = attr.getTriple();
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StringRef chipAKAcpu = attr.getChip();
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// NB: `TargetAttrInterface::getFeatures()` is coarsely typed to work around
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// cyclic dependency issue in tablegen files.
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auto featuresAttr =
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llvm::cast_if_present<LLVM::TargetFeaturesAttr>(attr.getFeatures());
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std::string features = featuresAttr ? featuresAttr.getFeaturesString() : "";
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llvm::Triple parsedTriple(triple);
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std::string error;
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const llvm::Target *target =
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llvm::TargetRegistry::lookupTarget(parsedTriple, error);
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if (!target || !error.empty()) {
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LDBG() << "Looking up target '" << triple << "' failed: " << error << "\n";
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return failure();
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}
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return std::unique_ptr<llvm::TargetMachine>(
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target->createTargetMachine(parsedTriple, chipAKAcpu, features, {}, {}));
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}
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FailureOr<llvm::DataLayout>
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getDataLayout(mlir::LLVM::TargetAttrInterface attr) {
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FailureOr<std::unique_ptr<llvm::TargetMachine>> targetMachine =
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getTargetMachine(attr);
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if (failed(targetMachine)) {
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LDBG() << "Failed to retrieve the target machine for data layout.\n";
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return failure();
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}
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return (targetMachine.value())->createDataLayout();
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}
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} // namespace detail
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} // namespace LLVM
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} // namespace mlir
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