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OpenACC.cpp
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//===-- OpenACC.cpp -- OpenACC directive lowering -------------------------===//
//
// 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
//
//===----------------------------------------------------------------------===//
//
// Coding style: https://mlir.llvm.org/getting_started/DeveloperGuide/
//
//===----------------------------------------------------------------------===//
#include "flang/Lower/OpenACC.h"
#include "flang/Common/idioms.h"
#include "flang/Lower/Bridge.h"
#include "flang/Lower/ConvertType.h"
#include "flang/Lower/DirectivesCommon.h"
#include "flang/Lower/Mangler.h"
#include "flang/Lower/PFTBuilder.h"
#include "flang/Lower/StatementContext.h"
#include "flang/Lower/Support/Utils.h"
#include "flang/Optimizer/Builder/BoxValue.h"
#include "flang/Optimizer/Builder/Complex.h"
#include "flang/Optimizer/Builder/FIRBuilder.h"
#include "flang/Optimizer/Builder/HLFIRTools.h"
#include "flang/Optimizer/Builder/IntrinsicCall.h"
#include "flang/Optimizer/Builder/Todo.h"
#include "flang/Parser/parse-tree-visitor.h"
#include "flang/Parser/parse-tree.h"
#include "flang/Semantics/expression.h"
#include "flang/Semantics/scope.h"
#include "flang/Semantics/tools.h"
#include "mlir/Dialect/ControlFlow/IR/ControlFlowOps.h"
#include "llvm/Frontend/OpenACC/ACC.h.inc"
#include "llvm/Support/Debug.h"
#define DEBUG_TYPE "flang-lower-openacc"
// Special value for * passed in device_type or gang clauses.
static constexpr std::int64_t starCst = -1;
static unsigned routineCounter = 0;
static constexpr llvm::StringRef accRoutinePrefix = "acc_routine_";
static constexpr llvm::StringRef accPrivateInitName = "acc.private.init";
static constexpr llvm::StringRef accReductionInitName = "acc.reduction.init";
static constexpr llvm::StringRef accFirDescriptorPostfix = "_desc";
static mlir::Location
genOperandLocation(Fortran::lower::AbstractConverter &converter,
const Fortran::parser::AccObject &accObject) {
mlir::Location loc = converter.genUnknownLocation();
Fortran::common::visit(
Fortran::common::visitors{
[&](const Fortran::parser::Designator &designator) {
loc = converter.genLocation(designator.source);
},
[&](const Fortran::parser::Name &name) {
loc = converter.genLocation(name.source);
}},
accObject.u);
return loc;
}
static void addOperands(llvm::SmallVectorImpl<mlir::Value> &operands,
llvm::SmallVectorImpl<int32_t> &operandSegments,
llvm::ArrayRef<mlir::Value> clauseOperands) {
operands.append(clauseOperands.begin(), clauseOperands.end());
operandSegments.push_back(clauseOperands.size());
}
static void addOperand(llvm::SmallVectorImpl<mlir::Value> &operands,
llvm::SmallVectorImpl<int32_t> &operandSegments,
const mlir::Value &clauseOperand) {
if (clauseOperand) {
operands.push_back(clauseOperand);
operandSegments.push_back(1);
} else {
operandSegments.push_back(0);
}
}
template <typename Op>
static Op
createDataEntryOp(fir::FirOpBuilder &builder, mlir::Location loc,
mlir::Value baseAddr, std::stringstream &name,
mlir::SmallVector<mlir::Value> bounds, bool structured,
bool implicit, mlir::acc::DataClause dataClause,
mlir::Type retTy, llvm::ArrayRef<mlir::Value> async,
llvm::ArrayRef<mlir::Attribute> asyncDeviceTypes,
llvm::ArrayRef<mlir::Attribute> asyncOnlyDeviceTypes,
bool unwrapBoxAddr = false, mlir::Value isPresent = {}) {
mlir::Value varPtrPtr;
// The data clause may apply to either the box reference itself or the
// pointer to the data it holds. So use `unwrapBoxAddr` to decide.
// When we have a box value - assume it refers to the data inside box.
if ((fir::isBoxAddress(baseAddr.getType()) && unwrapBoxAddr) ||
fir::isa_box_type(baseAddr.getType())) {
if (isPresent) {
mlir::Type ifRetTy =
mlir::cast<fir::BaseBoxType>(fir::unwrapRefType(baseAddr.getType()))
.getEleTy();
if (!fir::isa_ref_type(ifRetTy))
ifRetTy = fir::ReferenceType::get(ifRetTy);
baseAddr =
builder
.genIfOp(loc, {ifRetTy}, isPresent,
/*withElseRegion=*/true)
.genThen([&]() {
if (fir::isBoxAddress(baseAddr.getType()))
baseAddr = builder.create<fir::LoadOp>(loc, baseAddr);
mlir::Value boxAddr =
builder.create<fir::BoxAddrOp>(loc, baseAddr);
builder.create<fir::ResultOp>(loc, mlir::ValueRange{boxAddr});
})
.genElse([&] {
mlir::Value absent =
builder.create<fir::AbsentOp>(loc, ifRetTy);
builder.create<fir::ResultOp>(loc, mlir::ValueRange{absent});
})
.getResults()[0];
} else {
if (fir::isBoxAddress(baseAddr.getType()))
baseAddr = builder.create<fir::LoadOp>(loc, baseAddr);
baseAddr = builder.create<fir::BoxAddrOp>(loc, baseAddr);
}
retTy = baseAddr.getType();
}
llvm::SmallVector<mlir::Value, 8> operands;
llvm::SmallVector<int32_t, 8> operandSegments;
addOperand(operands, operandSegments, baseAddr);
addOperand(operands, operandSegments, varPtrPtr);
addOperands(operands, operandSegments, bounds);
addOperands(operands, operandSegments, async);
Op op = builder.create<Op>(loc, retTy, operands);
op.setNameAttr(builder.getStringAttr(name.str()));
op.setStructured(structured);
op.setImplicit(implicit);
op.setDataClause(dataClause);
op.setVarType(mlir::cast<mlir::acc::PointerLikeType>(baseAddr.getType())
.getElementType());
op->setAttr(Op::getOperandSegmentSizeAttr(),
builder.getDenseI32ArrayAttr(operandSegments));
if (!asyncDeviceTypes.empty())
op.setAsyncOperandsDeviceTypeAttr(builder.getArrayAttr(asyncDeviceTypes));
if (!asyncOnlyDeviceTypes.empty())
op.setAsyncOnlyAttr(builder.getArrayAttr(asyncOnlyDeviceTypes));
return op;
}
static void addDeclareAttr(fir::FirOpBuilder &builder, mlir::Operation *op,
mlir::acc::DataClause clause) {
if (!op)
return;
op->setAttr(mlir::acc::getDeclareAttrName(),
mlir::acc::DeclareAttr::get(builder.getContext(),
mlir::acc::DataClauseAttr::get(
builder.getContext(), clause)));
}
static mlir::func::FuncOp
createDeclareFunc(mlir::OpBuilder &modBuilder, fir::FirOpBuilder &builder,
mlir::Location loc, llvm::StringRef funcName,
llvm::SmallVector<mlir::Type> argsTy = {},
llvm::SmallVector<mlir::Location> locs = {}) {
auto funcTy = mlir::FunctionType::get(modBuilder.getContext(), argsTy, {});
auto funcOp = modBuilder.create<mlir::func::FuncOp>(loc, funcName, funcTy);
funcOp.setVisibility(mlir::SymbolTable::Visibility::Private);
builder.createBlock(&funcOp.getRegion(), funcOp.getRegion().end(), argsTy,
locs);
builder.setInsertionPointToEnd(&funcOp.getRegion().back());
builder.create<mlir::func::ReturnOp>(loc);
builder.setInsertionPointToStart(&funcOp.getRegion().back());
return funcOp;
}
template <typename Op>
static Op
createSimpleOp(fir::FirOpBuilder &builder, mlir::Location loc,
const llvm::SmallVectorImpl<mlir::Value> &operands,
const llvm::SmallVectorImpl<int32_t> &operandSegments) {
llvm::ArrayRef<mlir::Type> argTy;
Op op = builder.create<Op>(loc, argTy, operands);
op->setAttr(Op::getOperandSegmentSizeAttr(),
builder.getDenseI32ArrayAttr(operandSegments));
return op;
}
template <typename EntryOp>
static void createDeclareAllocFuncWithArg(mlir::OpBuilder &modBuilder,
fir::FirOpBuilder &builder,
mlir::Location loc, mlir::Type descTy,
llvm::StringRef funcNamePrefix,
std::stringstream &asFortran,
mlir::acc::DataClause clause) {
auto crtInsPt = builder.saveInsertionPoint();
std::stringstream registerFuncName;
registerFuncName << funcNamePrefix.str()
<< Fortran::lower::declarePostAllocSuffix.str();
if (!mlir::isa<fir::ReferenceType>(descTy))
descTy = fir::ReferenceType::get(descTy);
auto registerFuncOp = createDeclareFunc(
modBuilder, builder, loc, registerFuncName.str(), {descTy}, {loc});
llvm::SmallVector<mlir::Value> bounds;
std::stringstream asFortranDesc;
asFortranDesc << asFortran.str() << accFirDescriptorPostfix.str();
// Updating descriptor must occur before the mapping of the data so that
// attached data pointer is not overwritten.
mlir::acc::UpdateDeviceOp updateDeviceOp =
createDataEntryOp<mlir::acc::UpdateDeviceOp>(
builder, loc, registerFuncOp.getArgument(0), asFortranDesc, bounds,
/*structured=*/false, /*implicit=*/true,
mlir::acc::DataClause::acc_update_device, descTy,
/*async=*/{}, /*asyncDeviceTypes=*/{}, /*asyncOnlyDeviceTypes=*/{});
llvm::SmallVector<int32_t> operandSegments{0, 0, 0, 1};
llvm::SmallVector<mlir::Value> operands{updateDeviceOp.getResult()};
createSimpleOp<mlir::acc::UpdateOp>(builder, loc, operands, operandSegments);
mlir::Value desc =
builder.create<fir::LoadOp>(loc, registerFuncOp.getArgument(0));
fir::BoxAddrOp boxAddrOp = builder.create<fir::BoxAddrOp>(loc, desc);
addDeclareAttr(builder, boxAddrOp.getOperation(), clause);
EntryOp entryOp = createDataEntryOp<EntryOp>(
builder, loc, boxAddrOp.getResult(), asFortran, bounds,
/*structured=*/false, /*implicit=*/false, clause, boxAddrOp.getType(),
/*async=*/{}, /*asyncDeviceTypes=*/{}, /*asyncOnlyDeviceTypes=*/{});
builder.create<mlir::acc::DeclareEnterOp>(
loc, mlir::acc::DeclareTokenType::get(entryOp.getContext()),
mlir::ValueRange(entryOp.getAccPtr()));
modBuilder.setInsertionPointAfter(registerFuncOp);
builder.restoreInsertionPoint(crtInsPt);
}
template <typename ExitOp>
static void createDeclareDeallocFuncWithArg(
mlir::OpBuilder &modBuilder, fir::FirOpBuilder &builder, mlir::Location loc,
mlir::Type descTy, llvm::StringRef funcNamePrefix,
std::stringstream &asFortran, mlir::acc::DataClause clause) {
auto crtInsPt = builder.saveInsertionPoint();
// Generate the pre dealloc function.
std::stringstream preDeallocFuncName;
preDeallocFuncName << funcNamePrefix.str()
<< Fortran::lower::declarePreDeallocSuffix.str();
if (!mlir::isa<fir::ReferenceType>(descTy))
descTy = fir::ReferenceType::get(descTy);
auto preDeallocOp = createDeclareFunc(
modBuilder, builder, loc, preDeallocFuncName.str(), {descTy}, {loc});
mlir::Value loadOp =
builder.create<fir::LoadOp>(loc, preDeallocOp.getArgument(0));
fir::BoxAddrOp boxAddrOp = builder.create<fir::BoxAddrOp>(loc, loadOp);
addDeclareAttr(builder, boxAddrOp.getOperation(), clause);
llvm::SmallVector<mlir::Value> bounds;
mlir::acc::GetDevicePtrOp entryOp =
createDataEntryOp<mlir::acc::GetDevicePtrOp>(
builder, loc, boxAddrOp.getResult(), asFortran, bounds,
/*structured=*/false, /*implicit=*/false, clause, boxAddrOp.getType(),
/*async=*/{}, /*asyncDeviceTypes=*/{}, /*asyncOnlyDeviceTypes=*/{});
builder.create<mlir::acc::DeclareExitOp>(
loc, mlir::Value{}, mlir::ValueRange(entryOp.getAccPtr()));
if constexpr (std::is_same_v<ExitOp, mlir::acc::CopyoutOp> ||
std::is_same_v<ExitOp, mlir::acc::UpdateHostOp>)
builder.create<ExitOp>(entryOp.getLoc(), entryOp.getAccPtr(),
entryOp.getVarPtr(), entryOp.getVarType(),
entryOp.getBounds(), entryOp.getAsyncOperands(),
entryOp.getAsyncOperandsDeviceTypeAttr(),
entryOp.getAsyncOnlyAttr(), entryOp.getDataClause(),
/*structured=*/false, /*implicit=*/false,
builder.getStringAttr(*entryOp.getName()));
else
builder.create<ExitOp>(entryOp.getLoc(), entryOp.getAccPtr(),
entryOp.getBounds(), entryOp.getAsyncOperands(),
entryOp.getAsyncOperandsDeviceTypeAttr(),
entryOp.getAsyncOnlyAttr(), entryOp.getDataClause(),
/*structured=*/false, /*implicit=*/false,
builder.getStringAttr(*entryOp.getName()));
// Generate the post dealloc function.
modBuilder.setInsertionPointAfter(preDeallocOp);
std::stringstream postDeallocFuncName;
postDeallocFuncName << funcNamePrefix.str()
<< Fortran::lower::declarePostDeallocSuffix.str();
auto postDeallocOp = createDeclareFunc(
modBuilder, builder, loc, postDeallocFuncName.str(), {descTy}, {loc});
loadOp = builder.create<fir::LoadOp>(loc, postDeallocOp.getArgument(0));
asFortran << accFirDescriptorPostfix.str();
mlir::acc::UpdateDeviceOp updateDeviceOp =
createDataEntryOp<mlir::acc::UpdateDeviceOp>(
builder, loc, loadOp, asFortran, bounds,
/*structured=*/false, /*implicit=*/true,
mlir::acc::DataClause::acc_update_device, loadOp.getType(),
/*async=*/{}, /*asyncDeviceTypes=*/{}, /*asyncOnlyDeviceTypes=*/{});
llvm::SmallVector<int32_t> operandSegments{0, 0, 0, 1};
llvm::SmallVector<mlir::Value> operands{updateDeviceOp.getResult()};
createSimpleOp<mlir::acc::UpdateOp>(builder, loc, operands, operandSegments);
modBuilder.setInsertionPointAfter(postDeallocOp);
builder.restoreInsertionPoint(crtInsPt);
}
Fortran::semantics::Symbol &
getSymbolFromAccObject(const Fortran::parser::AccObject &accObject) {
if (const auto *designator =
std::get_if<Fortran::parser::Designator>(&accObject.u)) {
if (const auto *name =
Fortran::semantics::getDesignatorNameIfDataRef(*designator))
return *name->symbol;
if (const auto *arrayElement =
Fortran::parser::Unwrap<Fortran::parser::ArrayElement>(
*designator)) {
const Fortran::parser::Name &name =
Fortran::parser::GetLastName(arrayElement->base);
return *name.symbol;
}
if (const auto *component =
Fortran::parser::Unwrap<Fortran::parser::StructureComponent>(
*designator)) {
return *component->component.symbol;
}
} else if (const auto *name =
std::get_if<Fortran::parser::Name>(&accObject.u)) {
return *name->symbol;
}
llvm::report_fatal_error("Could not find symbol");
}
template <typename Op>
static void
genDataOperandOperations(const Fortran::parser::AccObjectList &objectList,
Fortran::lower::AbstractConverter &converter,
Fortran::semantics::SemanticsContext &semanticsContext,
Fortran::lower::StatementContext &stmtCtx,
llvm::SmallVectorImpl<mlir::Value> &dataOperands,
mlir::acc::DataClause dataClause, bool structured,
bool implicit, llvm::ArrayRef<mlir::Value> async,
llvm::ArrayRef<mlir::Attribute> asyncDeviceTypes,
llvm::ArrayRef<mlir::Attribute> asyncOnlyDeviceTypes,
bool setDeclareAttr = false) {
fir::FirOpBuilder &builder = converter.getFirOpBuilder();
Fortran::evaluate::ExpressionAnalyzer ea{semanticsContext};
for (const auto &accObject : objectList.v) {
llvm::SmallVector<mlir::Value> bounds;
std::stringstream asFortran;
mlir::Location operandLocation = genOperandLocation(converter, accObject);
Fortran::semantics::Symbol &symbol = getSymbolFromAccObject(accObject);
Fortran::semantics::MaybeExpr designator = Fortran::common::visit(
[&](auto &&s) { return ea.Analyze(s); }, accObject.u);
Fortran::lower::AddrAndBoundsInfo info =
Fortran::lower::gatherDataOperandAddrAndBounds<
mlir::acc::DataBoundsOp, mlir::acc::DataBoundsType>(
converter, builder, semanticsContext, stmtCtx, symbol, designator,
operandLocation, asFortran, bounds,
/*treatIndexAsSection=*/true);
LLVM_DEBUG(llvm::dbgs() << __func__ << "\n"; info.dump(llvm::dbgs()));
// If the input value is optional and is not a descriptor, we use the
// rawInput directly.
mlir::Value baseAddr = ((fir::unwrapRefType(info.addr.getType()) !=
fir::unwrapRefType(info.rawInput.getType())) &&
info.isPresent)
? info.rawInput
: info.addr;
Op op = createDataEntryOp<Op>(
builder, operandLocation, baseAddr, asFortran, bounds, structured,
implicit, dataClause, baseAddr.getType(), async, asyncDeviceTypes,
asyncOnlyDeviceTypes, /*unwrapBoxAddr=*/true, info.isPresent);
dataOperands.push_back(op.getAccPtr());
}
}
template <typename EntryOp, typename ExitOp>
static void genDeclareDataOperandOperations(
const Fortran::parser::AccObjectList &objectList,
Fortran::lower::AbstractConverter &converter,
Fortran::semantics::SemanticsContext &semanticsContext,
Fortran::lower::StatementContext &stmtCtx,
llvm::SmallVectorImpl<mlir::Value> &dataOperands,
mlir::acc::DataClause dataClause, bool structured, bool implicit) {
fir::FirOpBuilder &builder = converter.getFirOpBuilder();
Fortran::evaluate::ExpressionAnalyzer ea{semanticsContext};
for (const auto &accObject : objectList.v) {
llvm::SmallVector<mlir::Value> bounds;
std::stringstream asFortran;
mlir::Location operandLocation = genOperandLocation(converter, accObject);
Fortran::semantics::Symbol &symbol = getSymbolFromAccObject(accObject);
Fortran::semantics::MaybeExpr designator = Fortran::common::visit(
[&](auto &&s) { return ea.Analyze(s); }, accObject.u);
Fortran::lower::AddrAndBoundsInfo info =
Fortran::lower::gatherDataOperandAddrAndBounds<
mlir::acc::DataBoundsOp, mlir::acc::DataBoundsType>(
converter, builder, semanticsContext, stmtCtx, symbol, designator,
operandLocation, asFortran, bounds);
LLVM_DEBUG(llvm::dbgs() << __func__ << "\n"; info.dump(llvm::dbgs()));
EntryOp op = createDataEntryOp<EntryOp>(
builder, operandLocation, info.addr, asFortran, bounds, structured,
implicit, dataClause, info.addr.getType(),
/*async=*/{}, /*asyncDeviceTypes=*/{}, /*asyncOnlyDeviceTypes=*/{});
dataOperands.push_back(op.getAccPtr());
addDeclareAttr(builder, op.getVarPtr().getDefiningOp(), dataClause);
if (mlir::isa<fir::BaseBoxType>(fir::unwrapRefType(info.addr.getType()))) {
mlir::OpBuilder modBuilder(builder.getModule().getBodyRegion());
modBuilder.setInsertionPointAfter(builder.getFunction());
std::string prefix = converter.mangleName(symbol);
createDeclareAllocFuncWithArg<EntryOp>(
modBuilder, builder, operandLocation, info.addr.getType(), prefix,
asFortran, dataClause);
if constexpr (!std::is_same_v<EntryOp, ExitOp>)
createDeclareDeallocFuncWithArg<ExitOp>(
modBuilder, builder, operandLocation, info.addr.getType(), prefix,
asFortran, dataClause);
}
}
}
template <typename EntryOp, typename ExitOp, typename Clause>
static void genDeclareDataOperandOperationsWithModifier(
const Clause *x, Fortran::lower::AbstractConverter &converter,
Fortran::semantics::SemanticsContext &semanticsContext,
Fortran::lower::StatementContext &stmtCtx,
Fortran::parser::AccDataModifier::Modifier mod,
llvm::SmallVectorImpl<mlir::Value> &dataClauseOperands,
const mlir::acc::DataClause clause,
const mlir::acc::DataClause clauseWithModifier) {
const Fortran::parser::AccObjectListWithModifier &listWithModifier = x->v;
const auto &accObjectList =
std::get<Fortran::parser::AccObjectList>(listWithModifier.t);
const auto &modifier =
std::get<std::optional<Fortran::parser::AccDataModifier>>(
listWithModifier.t);
mlir::acc::DataClause dataClause =
(modifier && (*modifier).v == mod) ? clauseWithModifier : clause;
genDeclareDataOperandOperations<EntryOp, ExitOp>(
accObjectList, converter, semanticsContext, stmtCtx, dataClauseOperands,
dataClause,
/*structured=*/true, /*implicit=*/false);
}
template <typename EntryOp, typename ExitOp>
static void genDataExitOperations(fir::FirOpBuilder &builder,
llvm::SmallVector<mlir::Value> operands,
bool structured) {
for (mlir::Value operand : operands) {
auto entryOp = mlir::dyn_cast_or_null<EntryOp>(operand.getDefiningOp());
assert(entryOp && "data entry op expected");
if constexpr (std::is_same_v<ExitOp, mlir::acc::CopyoutOp> ||
std::is_same_v<ExitOp, mlir::acc::UpdateHostOp>)
builder.create<ExitOp>(
entryOp.getLoc(), entryOp.getAccPtr(), entryOp.getVarPtr(),
entryOp.getVarType(), entryOp.getBounds(), entryOp.getAsyncOperands(),
entryOp.getAsyncOperandsDeviceTypeAttr(), entryOp.getAsyncOnlyAttr(),
entryOp.getDataClause(), structured, entryOp.getImplicit(),
builder.getStringAttr(*entryOp.getName()));
else
builder.create<ExitOp>(
entryOp.getLoc(), entryOp.getAccPtr(), entryOp.getBounds(),
entryOp.getAsyncOperands(), entryOp.getAsyncOperandsDeviceTypeAttr(),
entryOp.getAsyncOnlyAttr(), entryOp.getDataClause(), structured,
entryOp.getImplicit(), builder.getStringAttr(*entryOp.getName()));
}
}
fir::ShapeOp genShapeOp(mlir::OpBuilder &builder, fir::SequenceType seqTy,
mlir::Location loc) {
llvm::SmallVector<mlir::Value> extents;
mlir::Type idxTy = builder.getIndexType();
for (auto extent : seqTy.getShape())
extents.push_back(builder.create<mlir::arith::ConstantOp>(
loc, idxTy, builder.getIntegerAttr(idxTy, extent)));
return builder.create<fir::ShapeOp>(loc, extents);
}
template <typename RecipeOp>
static void genPrivateLikeInitRegion(mlir::OpBuilder &builder, RecipeOp recipe,
mlir::Type ty, mlir::Location loc) {
mlir::Value retVal = recipe.getInitRegion().front().getArgument(0);
if (auto refTy = mlir::dyn_cast_or_null<fir::ReferenceType>(ty)) {
if (fir::isa_trivial(refTy.getEleTy())) {
auto alloca = builder.create<fir::AllocaOp>(loc, refTy.getEleTy());
auto declareOp = builder.create<hlfir::DeclareOp>(
loc, alloca, accPrivateInitName, /*shape=*/nullptr,
llvm::ArrayRef<mlir::Value>{}, /*dummy_scope=*/nullptr,
fir::FortranVariableFlagsAttr{});
retVal = declareOp.getBase();
} else if (auto seqTy = mlir::dyn_cast_or_null<fir::SequenceType>(
refTy.getEleTy())) {
if (fir::isa_trivial(seqTy.getEleTy())) {
mlir::Value shape;
llvm::SmallVector<mlir::Value> extents;
if (seqTy.hasDynamicExtents()) {
// Extents are passed as block arguments. First argument is the
// original value.
for (unsigned i = 1; i < recipe.getInitRegion().getArguments().size();
++i)
extents.push_back(recipe.getInitRegion().getArgument(i));
shape = builder.create<fir::ShapeOp>(loc, extents);
} else {
shape = genShapeOp(builder, seqTy, loc);
}
auto alloca = builder.create<fir::AllocaOp>(
loc, seqTy, /*typeparams=*/mlir::ValueRange{}, extents);
auto declareOp = builder.create<hlfir::DeclareOp>(
loc, alloca, accPrivateInitName, shape,
llvm::ArrayRef<mlir::Value>{}, /*dummy_scope=*/nullptr,
fir::FortranVariableFlagsAttr{});
retVal = declareOp.getBase();
}
}
} else if (auto boxTy = mlir::dyn_cast_or_null<fir::BaseBoxType>(ty)) {
mlir::Type innerTy = fir::extractSequenceType(boxTy);
if (!innerTy)
TODO(loc, "Unsupported boxed type in OpenACC privatization");
fir::FirOpBuilder firBuilder{builder, recipe.getOperation()};
hlfir::Entity source = hlfir::Entity{retVal};
auto [temp, cleanup] = hlfir::createTempFromMold(loc, firBuilder, source);
retVal = temp;
}
builder.create<mlir::acc::YieldOp>(loc, retVal);
}
mlir::acc::PrivateRecipeOp
Fortran::lower::createOrGetPrivateRecipe(mlir::OpBuilder &builder,
llvm::StringRef recipeName,
mlir::Location loc, mlir::Type ty) {
mlir::ModuleOp mod =
builder.getBlock()->getParent()->getParentOfType<mlir::ModuleOp>();
if (auto recipe = mod.lookupSymbol<mlir::acc::PrivateRecipeOp>(recipeName))
return recipe;
auto crtPos = builder.saveInsertionPoint();
mlir::OpBuilder modBuilder(mod.getBodyRegion());
auto recipe =
modBuilder.create<mlir::acc::PrivateRecipeOp>(loc, recipeName, ty);
llvm::SmallVector<mlir::Type> argsTy{ty};
llvm::SmallVector<mlir::Location> argsLoc{loc};
if (auto refTy = mlir::dyn_cast_or_null<fir::ReferenceType>(ty)) {
if (auto seqTy =
mlir::dyn_cast_or_null<fir::SequenceType>(refTy.getEleTy())) {
if (seqTy.hasDynamicExtents()) {
mlir::Type idxTy = builder.getIndexType();
for (unsigned i = 0; i < seqTy.getDimension(); ++i) {
argsTy.push_back(idxTy);
argsLoc.push_back(loc);
}
}
}
}
builder.createBlock(&recipe.getInitRegion(), recipe.getInitRegion().end(),
argsTy, argsLoc);
builder.setInsertionPointToEnd(&recipe.getInitRegion().back());
genPrivateLikeInitRegion<mlir::acc::PrivateRecipeOp>(builder, recipe, ty,
loc);
builder.restoreInsertionPoint(crtPos);
return recipe;
}
/// Check if the DataBoundsOp is a constant bound (lb and ub are constants or
/// extent is a constant).
bool isConstantBound(mlir::acc::DataBoundsOp &op) {
if (op.getLowerbound() && fir::getIntIfConstant(op.getLowerbound()) &&
op.getUpperbound() && fir::getIntIfConstant(op.getUpperbound()))
return true;
if (op.getExtent() && fir::getIntIfConstant(op.getExtent()))
return true;
return false;
}
/// Return true iff all the bounds are expressed with constant values.
bool areAllBoundConstant(const llvm::SmallVector<mlir::Value> &bounds) {
for (auto bound : bounds) {
auto dataBound =
mlir::dyn_cast<mlir::acc::DataBoundsOp>(bound.getDefiningOp());
assert(dataBound && "Must be DataBoundOp operation");
if (!isConstantBound(dataBound))
return false;
}
return true;
}
static llvm::SmallVector<mlir::Value>
genConstantBounds(fir::FirOpBuilder &builder, mlir::Location loc,
mlir::acc::DataBoundsOp &dataBound) {
mlir::Type idxTy = builder.getIndexType();
mlir::Value lb, ub, step;
if (dataBound.getLowerbound() &&
fir::getIntIfConstant(dataBound.getLowerbound()) &&
dataBound.getUpperbound() &&
fir::getIntIfConstant(dataBound.getUpperbound())) {
lb = builder.createIntegerConstant(
loc, idxTy, *fir::getIntIfConstant(dataBound.getLowerbound()));
ub = builder.createIntegerConstant(
loc, idxTy, *fir::getIntIfConstant(dataBound.getUpperbound()));
step = builder.createIntegerConstant(loc, idxTy, 1);
} else if (dataBound.getExtent()) {
lb = builder.createIntegerConstant(loc, idxTy, 0);
ub = builder.createIntegerConstant(
loc, idxTy, *fir::getIntIfConstant(dataBound.getExtent()) - 1);
step = builder.createIntegerConstant(loc, idxTy, 1);
} else {
llvm::report_fatal_error("Expect constant lb/ub or extent");
}
return {lb, ub, step};
}
static fir::ShapeOp genShapeFromBoundsOrArgs(
mlir::Location loc, fir::FirOpBuilder &builder, fir::SequenceType seqTy,
const llvm::SmallVector<mlir::Value> &bounds, mlir::ValueRange arguments) {
llvm::SmallVector<mlir::Value> args;
if (areAllBoundConstant(bounds)) {
for (auto bound : llvm::reverse(bounds)) {
auto dataBound =
mlir::cast<mlir::acc::DataBoundsOp>(bound.getDefiningOp());
args.append(genConstantBounds(builder, loc, dataBound));
}
} else {
assert(((arguments.size() - 2) / 3 == seqTy.getDimension()) &&
"Expect 3 block arguments per dimension");
for (auto arg : arguments.drop_front(2))
args.push_back(arg);
}
assert(args.size() % 3 == 0 && "Triplets must be a multiple of 3");
llvm::SmallVector<mlir::Value> extents;
mlir::Type idxTy = builder.getIndexType();
mlir::Value one = builder.createIntegerConstant(loc, idxTy, 1);
mlir::Value zero = builder.createIntegerConstant(loc, idxTy, 0);
for (unsigned i = 0; i < args.size(); i += 3) {
mlir::Value s1 =
builder.create<mlir::arith::SubIOp>(loc, args[i + 1], args[0]);
mlir::Value s2 = builder.create<mlir::arith::AddIOp>(loc, s1, one);
mlir::Value s3 = builder.create<mlir::arith::DivSIOp>(loc, s2, args[i + 2]);
mlir::Value cmp = builder.create<mlir::arith::CmpIOp>(
loc, mlir::arith::CmpIPredicate::sgt, s3, zero);
mlir::Value ext = builder.create<mlir::arith::SelectOp>(loc, cmp, s3, zero);
extents.push_back(ext);
}
return builder.create<fir::ShapeOp>(loc, extents);
}
static hlfir::DesignateOp::Subscripts
getSubscriptsFromArgs(mlir::ValueRange args) {
hlfir::DesignateOp::Subscripts triplets;
for (unsigned i = 2; i < args.size(); i += 3)
triplets.emplace_back(
hlfir::DesignateOp::Triplet{args[i], args[i + 1], args[i + 2]});
return triplets;
}
static hlfir::Entity genDesignateWithTriplets(
fir::FirOpBuilder &builder, mlir::Location loc, hlfir::Entity &entity,
hlfir::DesignateOp::Subscripts &triplets, mlir::Value shape) {
llvm::SmallVector<mlir::Value> lenParams;
hlfir::genLengthParameters(loc, builder, entity, lenParams);
auto designate = builder.create<hlfir::DesignateOp>(
loc, entity.getBase().getType(), entity, /*component=*/"",
/*componentShape=*/mlir::Value{}, triplets,
/*substring=*/mlir::ValueRange{}, /*complexPartAttr=*/std::nullopt, shape,
lenParams);
return hlfir::Entity{designate.getResult()};
}
mlir::acc::FirstprivateRecipeOp Fortran::lower::createOrGetFirstprivateRecipe(
mlir::OpBuilder &builder, llvm::StringRef recipeName, mlir::Location loc,
mlir::Type ty, llvm::SmallVector<mlir::Value> &bounds) {
mlir::ModuleOp mod =
builder.getBlock()->getParent()->getParentOfType<mlir::ModuleOp>();
if (auto recipe =
mod.lookupSymbol<mlir::acc::FirstprivateRecipeOp>(recipeName))
return recipe;
auto crtPos = builder.saveInsertionPoint();
mlir::OpBuilder modBuilder(mod.getBodyRegion());
auto recipe =
modBuilder.create<mlir::acc::FirstprivateRecipeOp>(loc, recipeName, ty);
llvm::SmallVector<mlir::Type> initArgsTy{ty};
llvm::SmallVector<mlir::Location> initArgsLoc{loc};
auto refTy = fir::unwrapRefType(ty);
if (auto seqTy = mlir::dyn_cast_or_null<fir::SequenceType>(refTy)) {
if (seqTy.hasDynamicExtents()) {
mlir::Type idxTy = builder.getIndexType();
for (unsigned i = 0; i < seqTy.getDimension(); ++i) {
initArgsTy.push_back(idxTy);
initArgsLoc.push_back(loc);
}
}
}
builder.createBlock(&recipe.getInitRegion(), recipe.getInitRegion().end(),
initArgsTy, initArgsLoc);
builder.setInsertionPointToEnd(&recipe.getInitRegion().back());
genPrivateLikeInitRegion<mlir::acc::FirstprivateRecipeOp>(builder, recipe, ty,
loc);
bool allConstantBound = areAllBoundConstant(bounds);
llvm::SmallVector<mlir::Type> argsTy{ty, ty};
llvm::SmallVector<mlir::Location> argsLoc{loc, loc};
if (!allConstantBound) {
for (mlir::Value bound : llvm::reverse(bounds)) {
auto dataBound =
mlir::dyn_cast<mlir::acc::DataBoundsOp>(bound.getDefiningOp());
argsTy.push_back(dataBound.getLowerbound().getType());
argsLoc.push_back(dataBound.getLowerbound().getLoc());
argsTy.push_back(dataBound.getUpperbound().getType());
argsLoc.push_back(dataBound.getUpperbound().getLoc());
argsTy.push_back(dataBound.getStartIdx().getType());
argsLoc.push_back(dataBound.getStartIdx().getLoc());
}
}
builder.createBlock(&recipe.getCopyRegion(), recipe.getCopyRegion().end(),
argsTy, argsLoc);
builder.setInsertionPointToEnd(&recipe.getCopyRegion().back());
ty = fir::unwrapRefType(ty);
if (fir::isa_trivial(ty)) {
mlir::Value initValue = builder.create<fir::LoadOp>(
loc, recipe.getCopyRegion().front().getArgument(0));
builder.create<fir::StoreOp>(loc, initValue,
recipe.getCopyRegion().front().getArgument(1));
} else if (auto seqTy = mlir::dyn_cast_or_null<fir::SequenceType>(ty)) {
fir::FirOpBuilder firBuilder{builder, recipe.getOperation()};
auto shape = genShapeFromBoundsOrArgs(
loc, firBuilder, seqTy, bounds, recipe.getCopyRegion().getArguments());
auto leftDeclOp = builder.create<hlfir::DeclareOp>(
loc, recipe.getCopyRegion().getArgument(0), llvm::StringRef{}, shape,
llvm::ArrayRef<mlir::Value>{}, /*dummy_scope=*/nullptr,
fir::FortranVariableFlagsAttr{});
auto rightDeclOp = builder.create<hlfir::DeclareOp>(
loc, recipe.getCopyRegion().getArgument(1), llvm::StringRef{}, shape,
llvm::ArrayRef<mlir::Value>{}, /*dummy_scope=*/nullptr,
fir::FortranVariableFlagsAttr{});
hlfir::DesignateOp::Subscripts triplets =
getSubscriptsFromArgs(recipe.getCopyRegion().getArguments());
auto leftEntity = hlfir::Entity{leftDeclOp.getBase()};
auto left =
genDesignateWithTriplets(firBuilder, loc, leftEntity, triplets, shape);
auto rightEntity = hlfir::Entity{rightDeclOp.getBase()};
auto right =
genDesignateWithTriplets(firBuilder, loc, rightEntity, triplets, shape);
firBuilder.create<hlfir::AssignOp>(loc, left, right);
} else if (auto boxTy = mlir::dyn_cast_or_null<fir::BaseBoxType>(ty)) {
fir::FirOpBuilder firBuilder{builder, recipe.getOperation()};
llvm::SmallVector<mlir::Value> tripletArgs;
mlir::Type innerTy = fir::extractSequenceType(boxTy);
fir::SequenceType seqTy =
mlir::dyn_cast_or_null<fir::SequenceType>(innerTy);
if (!seqTy)
TODO(loc, "Unsupported boxed type in OpenACC firstprivate");
auto shape = genShapeFromBoundsOrArgs(
loc, firBuilder, seqTy, bounds, recipe.getCopyRegion().getArguments());
hlfir::DesignateOp::Subscripts triplets =
getSubscriptsFromArgs(recipe.getCopyRegion().getArguments());
auto leftEntity = hlfir::Entity{recipe.getCopyRegion().getArgument(0)};
auto left =
genDesignateWithTriplets(firBuilder, loc, leftEntity, triplets, shape);
auto rightEntity = hlfir::Entity{recipe.getCopyRegion().getArgument(1)};
auto right =
genDesignateWithTriplets(firBuilder, loc, rightEntity, triplets, shape);
firBuilder.create<hlfir::AssignOp>(loc, left, right);
}
builder.create<mlir::acc::TerminatorOp>(loc);
builder.restoreInsertionPoint(crtPos);
return recipe;
}
/// Get a string representation of the bounds.
std::string getBoundsString(llvm::SmallVector<mlir::Value> &bounds) {
std::stringstream boundStr;
if (!bounds.empty())
boundStr << "_section_";
llvm::interleave(
bounds,
[&](mlir::Value bound) {
auto boundsOp =
mlir::cast<mlir::acc::DataBoundsOp>(bound.getDefiningOp());
if (boundsOp.getLowerbound() &&
fir::getIntIfConstant(boundsOp.getLowerbound()) &&
boundsOp.getUpperbound() &&
fir::getIntIfConstant(boundsOp.getUpperbound())) {
boundStr << "lb" << *fir::getIntIfConstant(boundsOp.getLowerbound())
<< ".ub" << *fir::getIntIfConstant(boundsOp.getUpperbound());
} else if (boundsOp.getExtent() &&
fir::getIntIfConstant(boundsOp.getExtent())) {
boundStr << "ext" << *fir::getIntIfConstant(boundsOp.getExtent());
} else {
boundStr << "?";
}
},
[&] { boundStr << "x"; });
return boundStr.str();
}
/// Rebuild the array type from the acc.bounds operation with constant
/// lowerbound/upperbound or extent.
mlir::Type getTypeFromBounds(llvm::SmallVector<mlir::Value> &bounds,
mlir::Type ty) {
auto seqTy =
mlir::dyn_cast_or_null<fir::SequenceType>(fir::unwrapRefType(ty));
if (!bounds.empty() && seqTy) {
llvm::SmallVector<int64_t> shape;
for (auto b : bounds) {
auto boundsOp =
mlir::dyn_cast<mlir::acc::DataBoundsOp>(b.getDefiningOp());
if (boundsOp.getLowerbound() &&
fir::getIntIfConstant(boundsOp.getLowerbound()) &&
boundsOp.getUpperbound() &&
fir::getIntIfConstant(boundsOp.getUpperbound())) {
int64_t ext = *fir::getIntIfConstant(boundsOp.getUpperbound()) -
*fir::getIntIfConstant(boundsOp.getLowerbound()) + 1;
shape.push_back(ext);
} else if (boundsOp.getExtent() &&
fir::getIntIfConstant(boundsOp.getExtent())) {
shape.push_back(*fir::getIntIfConstant(boundsOp.getExtent()));
} else {
return ty; // TODO: handle dynamic shaped array slice.
}
}
if (shape.empty() || shape.size() != bounds.size())
return ty;
auto newSeqTy = fir::SequenceType::get(shape, seqTy.getEleTy());
if (mlir::isa<fir::ReferenceType, fir::PointerType>(ty))
return fir::ReferenceType::get(newSeqTy);
return newSeqTy;
}
return ty;
}
template <typename RecipeOp>
static void
genPrivatizations(const Fortran::parser::AccObjectList &objectList,
Fortran::lower::AbstractConverter &converter,
Fortran::semantics::SemanticsContext &semanticsContext,
Fortran::lower::StatementContext &stmtCtx,
llvm::SmallVectorImpl<mlir::Value> &dataOperands,
llvm::SmallVector<mlir::Attribute> &privatizations,
llvm::ArrayRef<mlir::Value> async,
llvm::ArrayRef<mlir::Attribute> asyncDeviceTypes,
llvm::ArrayRef<mlir::Attribute> asyncOnlyDeviceTypes) {
fir::FirOpBuilder &builder = converter.getFirOpBuilder();
Fortran::evaluate::ExpressionAnalyzer ea{semanticsContext};
for (const auto &accObject : objectList.v) {
llvm::SmallVector<mlir::Value> bounds;
std::stringstream asFortran;
mlir::Location operandLocation = genOperandLocation(converter, accObject);
Fortran::semantics::Symbol &symbol = getSymbolFromAccObject(accObject);
Fortran::semantics::MaybeExpr designator = Fortran::common::visit(
[&](auto &&s) { return ea.Analyze(s); }, accObject.u);
Fortran::lower::AddrAndBoundsInfo info =
Fortran::lower::gatherDataOperandAddrAndBounds<
mlir::acc::DataBoundsOp, mlir::acc::DataBoundsType>(
converter, builder, semanticsContext, stmtCtx, symbol, designator,
operandLocation, asFortran, bounds);
LLVM_DEBUG(llvm::dbgs() << __func__ << "\n"; info.dump(llvm::dbgs()));
RecipeOp recipe;
mlir::Type retTy = getTypeFromBounds(bounds, info.addr.getType());
if constexpr (std::is_same_v<RecipeOp, mlir::acc::PrivateRecipeOp>) {
std::string recipeName =
fir::getTypeAsString(retTy, converter.getKindMap(),
Fortran::lower::privatizationRecipePrefix);
recipe = Fortran::lower::createOrGetPrivateRecipe(builder, recipeName,
operandLocation, retTy);
auto op = createDataEntryOp<mlir::acc::PrivateOp>(
builder, operandLocation, info.addr, asFortran, bounds, true,
/*implicit=*/false, mlir::acc::DataClause::acc_private, retTy, async,
asyncDeviceTypes, asyncOnlyDeviceTypes, /*unwrapBoxAddr=*/true);
dataOperands.push_back(op.getAccPtr());
} else {
std::string suffix =
areAllBoundConstant(bounds) ? getBoundsString(bounds) : "";
std::string recipeName = fir::getTypeAsString(
retTy, converter.getKindMap(), "firstprivatization" + suffix);
recipe = Fortran::lower::createOrGetFirstprivateRecipe(
builder, recipeName, operandLocation, retTy, bounds);
auto op = createDataEntryOp<mlir::acc::FirstprivateOp>(
builder, operandLocation, info.addr, asFortran, bounds, true,
/*implicit=*/false, mlir::acc::DataClause::acc_firstprivate, retTy,
async, asyncDeviceTypes, asyncOnlyDeviceTypes,
/*unwrapBoxAddr=*/true);
dataOperands.push_back(op.getAccPtr());
}
privatizations.push_back(mlir::SymbolRefAttr::get(
builder.getContext(), recipe.getSymName().str()));
}
}
/// Return the corresponding enum value for the mlir::acc::ReductionOperator
/// from the parser representation.
static mlir::acc::ReductionOperator
getReductionOperator(const Fortran::parser::ReductionOperator &op) {
switch (op.v) {
case Fortran::parser::ReductionOperator::Operator::Plus:
return mlir::acc::ReductionOperator::AccAdd;
case Fortran::parser::ReductionOperator::Operator::Multiply:
return mlir::acc::ReductionOperator::AccMul;
case Fortran::parser::ReductionOperator::Operator::Max:
return mlir::acc::ReductionOperator::AccMax;
case Fortran::parser::ReductionOperator::Operator::Min:
return mlir::acc::ReductionOperator::AccMin;
case Fortran::parser::ReductionOperator::Operator::Iand:
return mlir::acc::ReductionOperator::AccIand;
case Fortran::parser::ReductionOperator::Operator::Ior:
return mlir::acc::ReductionOperator::AccIor;
case Fortran::parser::ReductionOperator::Operator::Ieor:
return mlir::acc::ReductionOperator::AccXor;
case Fortran::parser::ReductionOperator::Operator::And:
return mlir::acc::ReductionOperator::AccLand;
case Fortran::parser::ReductionOperator::Operator::Or:
return mlir::acc::ReductionOperator::AccLor;
case Fortran::parser::ReductionOperator::Operator::Eqv:
return mlir::acc::ReductionOperator::AccEqv;
case Fortran::parser::ReductionOperator::Operator::Neqv:
return mlir::acc::ReductionOperator::AccNeqv;
}
llvm_unreachable("unexpected reduction operator");
}
/// Get the initial value for reduction operator.
template <typename R>
static R getReductionInitValue(mlir::acc::ReductionOperator op, mlir::Type ty) {
if (op == mlir::acc::ReductionOperator::AccMin) {
// min init value -> largest
if constexpr (std::is_same_v<R, llvm::APInt>) {
assert(ty.isIntOrIndex() && "expect integer or index type");
return llvm::APInt::getSignedMaxValue(ty.getIntOrFloatBitWidth());
}
if constexpr (std::is_same_v<R, llvm::APFloat>) {
auto floatTy = mlir::dyn_cast_or_null<mlir::FloatType>(ty);
assert(floatTy && "expect float type");
return llvm::APFloat::getLargest(floatTy.getFloatSemantics(),
/*negative=*/false);
}
} else if (op == mlir::acc::ReductionOperator::AccMax) {
// max init value -> smallest
if constexpr (std::is_same_v<R, llvm::APInt>) {
assert(ty.isIntOrIndex() && "expect integer or index type");
return llvm::APInt::getSignedMinValue(ty.getIntOrFloatBitWidth());
}
if constexpr (std::is_same_v<R, llvm::APFloat>) {
auto floatTy = mlir::dyn_cast_or_null<mlir::FloatType>(ty);
assert(floatTy && "expect float type");
return llvm::APFloat::getSmallest(floatTy.getFloatSemantics(),
/*negative=*/true);
}
} else if (op == mlir::acc::ReductionOperator::AccIand) {
if constexpr (std::is_same_v<R, llvm::APInt>) {
assert(ty.isIntOrIndex() && "expect integer type");
unsigned bits = ty.getIntOrFloatBitWidth();
return llvm::APInt::getAllOnes(bits);
}
} else {
// +, ior, ieor init value -> 0
// * init value -> 1
int64_t value = (op == mlir::acc::ReductionOperator::AccMul) ? 1 : 0;
if constexpr (std::is_same_v<R, llvm::APInt>) {
assert(ty.isIntOrIndex() && "expect integer or index type");
return llvm::APInt(ty.getIntOrFloatBitWidth(), value, true);
}
if constexpr (std::is_same_v<R, llvm::APFloat>) {
assert(mlir::isa<mlir::FloatType>(ty) && "expect float type");
auto floatTy = mlir::dyn_cast<mlir::FloatType>(ty);
return llvm::APFloat(floatTy.getFloatSemantics(), value);
}
if constexpr (std::is_same_v<R, int64_t>)
return value;
}
llvm_unreachable("OpenACC reduction unsupported type");
}
/// Return a constant with the initial value for the reduction operator and
/// type combination.
static mlir::Value getReductionInitValue(fir::FirOpBuilder &builder,
mlir::Location loc, mlir::Type ty,
mlir::acc::ReductionOperator op) {
if (op == mlir::acc::ReductionOperator::AccLand ||
op == mlir::acc::ReductionOperator::AccLor ||
op == mlir::acc::ReductionOperator::AccEqv ||
op == mlir::acc::ReductionOperator::AccNeqv) {
assert(mlir::isa<fir::LogicalType>(ty) && "expect fir.logical type");
bool value = true; // .true. for .and. and .eqv.
if (op == mlir::acc::ReductionOperator::AccLor ||
op == mlir::acc::ReductionOperator::AccNeqv)
value = false; // .false. for .or. and .neqv.
return builder.createBool(loc, value);
}
if (ty.isIntOrIndex())
return builder.create<mlir::arith::ConstantOp>(
loc, ty,