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//===- ROCDLAttachTarget.cpp - Attach an ROCDL target ---------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// This file implements the `GpuROCDLAttachTarget` pass, attaching
// `#rocdl.target` attributes to GPU modules.
//
//===----------------------------------------------------------------------===//
#include "mlir/Dialect/GPU/Transforms/Passes.h"
#include "mlir/Dialect/GPU/IR/GPUDialect.h"
#include "mlir/Dialect/LLVMIR/ROCDLDialect.h"
#include "mlir/IR/Builders.h"
#include "mlir/Pass/Pass.h"
#include "mlir/Target/LLVM/ROCDL/Target.h"
#include "llvm/Support/Regex.h"
namespace mlir {
#define GEN_PASS_DEF_GPUROCDLATTACHTARGET
#include "mlir/Dialect/GPU/Transforms/Passes.h.inc"
} // namespace mlir
using namespace mlir;
using namespace mlir::ROCDL;
namespace {
struct ROCDLAttachTarget
: public impl::GpuROCDLAttachTargetBase<ROCDLAttachTarget> {
using Base::Base;
DictionaryAttr getFlags(OpBuilder &builder) const;
void runOnOperation() override;
void getDependentDialects(DialectRegistry ®istry) const override {
registry.insert<ROCDL::ROCDLDialect>();
}
};
} // namespace
DictionaryAttr ROCDLAttachTarget::getFlags(OpBuilder &builder) const {
UnitAttr unitAttr = builder.getUnitAttr();
SmallVector<NamedAttribute, 6> flags;
auto addFlag = [&](StringRef flag) {
flags.push_back(builder.getNamedAttr(flag, unitAttr));
};
if (!wave64Flag)
addFlag("no_wave64");
if (fastFlag)
addFlag("fast");
if (dazFlag)
addFlag("daz");
if (finiteOnlyFlag)
addFlag("finite_only");
if (unsafeMathFlag)
addFlag("unsafe_math");
if (!correctSqrtFlag)
addFlag("unsafe_sqrt");
if (!flags.empty())
return builder.getDictionaryAttr(flags);
return nullptr;
}
void ROCDLAttachTarget::runOnOperation() {
OpBuilder builder(&getContext());
ArrayRef<std::string> libs(linkLibs);
SmallVector<StringRef> filesToLink(libs);
auto target = builder.getAttr<ROCDLTargetAttr>(
optLevel, triple, chip, features, abiVersion, getFlags(builder),
filesToLink.empty() ? nullptr : builder.getStrArrayAttr(filesToLink));
llvm::Regex matcher(moduleMatcher);
for (Region ®ion : getOperation()->getRegions())
for (Block &block : region.getBlocks())
for (auto module : block.getOps<gpu::GPUModuleOp>()) {
// Check if the name of the module matches.
if (!moduleMatcher.empty() && !matcher.match(module.getName()))
continue;
// Create the target array.
SmallVector<Attribute> targets;
if (std::optional<ArrayAttr> attrs = module.getTargets())
targets.append(attrs->getValue().begin(), attrs->getValue().end());
targets.push_back(target);
// Remove any duplicate targets.
targets.erase(llvm::unique(targets), targets.end());
// Update the target attribute array.
module.setTargetsAttr(builder.getArrayAttr(targets));
}
}
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