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//===-- FIROpenACCTypeInterfaces.cpp --------------------------------------===//
//
// 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
//
//===----------------------------------------------------------------------===//
//
// Implementation of external dialect interfaces for FIR.
//
//===----------------------------------------------------------------------===//
#include "flang/Optimizer/OpenACC/FIROpenACCTypeInterfaces.h"
#include "flang/Optimizer/Builder/BoxValue.h"
#include "flang/Optimizer/Builder/DirectivesCommon.h"
#include "flang/Optimizer/Builder/FIRBuilder.h"
#include "flang/Optimizer/Builder/HLFIRTools.h"
#include "flang/Optimizer/Dialect/FIROps.h"
#include "flang/Optimizer/Dialect/FIROpsSupport.h"
#include "flang/Optimizer/Dialect/FIRType.h"
#include "flang/Optimizer/Dialect/Support/FIRContext.h"
#include "flang/Optimizer/Dialect/Support/KindMapping.h"
#include "mlir/Dialect/Arith/IR/Arith.h"
#include "mlir/Dialect/OpenACC/OpenACC.h"
#include "mlir/IR/BuiltinOps.h"
#include "mlir/Support/LLVM.h"
namespace fir::acc {
static mlir::TypedValue<mlir::acc::PointerLikeType>
getPtrFromVar(mlir::Value var) {
if (auto ptr =
mlir::dyn_cast<mlir::TypedValue<mlir::acc::PointerLikeType>>(var))
return ptr;
if (auto load = mlir::dyn_cast_if_present<fir::LoadOp>(var.getDefiningOp())) {
// All FIR reference types implement the PointerLikeType interface.
return mlir::cast<mlir::TypedValue<mlir::acc::PointerLikeType>>(
load.getMemref());
}
return {};
}
template <>
mlir::TypedValue<mlir::acc::PointerLikeType>
OpenACCMappableModel<fir::SequenceType>::getVarPtr(mlir::Type type,
mlir::Value var) const {
return getPtrFromVar(var);
}
template <>
mlir::TypedValue<mlir::acc::PointerLikeType>
OpenACCMappableModel<fir::BaseBoxType>::getVarPtr(mlir::Type type,
mlir::Value var) const {
return getPtrFromVar(var);
}
template <>
std::optional<llvm::TypeSize>
OpenACCMappableModel<fir::SequenceType>::getSizeInBytes(
mlir::Type type, mlir::Value var, mlir::ValueRange accBounds,
const mlir::DataLayout &dataLayout) const {
// TODO: Bounds operation affect the total size - add support to take them
// into account.
if (!accBounds.empty())
return {};
// Dynamic extents or unknown ranks generally do not have compile-time
// computable dimensions.
auto seqType = mlir::cast<fir::SequenceType>(type);
if (seqType.hasDynamicExtents() || seqType.hasUnknownShape())
return {};
// Attempt to find an operation that a lookup for KindMapping can be done
// from.
mlir::Operation *kindMapSrcOp = var.getDefiningOp();
if (!kindMapSrcOp) {
kindMapSrcOp = var.getParentRegion()->getParentOp();
if (!kindMapSrcOp)
return {};
}
auto kindMap = fir::getKindMapping(kindMapSrcOp);
auto sizeAndAlignment =
fir::getTypeSizeAndAlignment(var.getLoc(), type, dataLayout, kindMap);
if (!sizeAndAlignment.has_value())
return {};
return {llvm::TypeSize::getFixed(sizeAndAlignment->first)};
}
template <>
std::optional<llvm::TypeSize>
OpenACCMappableModel<fir::BaseBoxType>::getSizeInBytes(
mlir::Type type, mlir::Value var, mlir::ValueRange accBounds,
const mlir::DataLayout &dataLayout) const {
// If we have a box value instead of box reference, the intent is to
// get the size of the data not the box itself.
if (auto boxTy = mlir::dyn_cast<fir::BaseBoxType>(var.getType())) {
if (auto mappableTy = mlir::dyn_cast<mlir::acc::MappableType>(
fir::unwrapRefType(boxTy.getEleTy()))) {
return mappableTy.getSizeInBytes(var, accBounds, dataLayout);
}
}
// Size for boxes is not computable until it gets materialized.
return {};
}
template <>
std::optional<int64_t>
OpenACCMappableModel<fir::SequenceType>::getOffsetInBytes(
mlir::Type type, mlir::Value var, mlir::ValueRange accBounds,
const mlir::DataLayout &dataLayout) const {
// TODO: Bounds operation affect the offset- add support to take them
// into account.
if (!accBounds.empty())
return {};
// Dynamic extents (aka descriptor-based arrays) - may have a offset.
// For example, a negative stride may mean a negative offset to compute the
// start of array.
auto seqType = mlir::cast<fir::SequenceType>(type);
if (seqType.hasDynamicExtents() || seqType.hasUnknownShape())
return {};
// We have non-dynamic extents - but if for some reason the size is not
// computable - assume offset is not either. Otherwise, it is an offset of
// zero.
if (getSizeInBytes(type, var, accBounds, dataLayout).has_value()) {
return {0};
}
return {};
}
template <>
std::optional<int64_t> OpenACCMappableModel<fir::BaseBoxType>::getOffsetInBytes(
mlir::Type type, mlir::Value var, mlir::ValueRange accBounds,
const mlir::DataLayout &dataLayout) const {
// If we have a box value instead of box reference, the intent is to
// get the offset of the data not the offset of the box itself.
if (auto boxTy = mlir::dyn_cast<fir::BaseBoxType>(var.getType())) {
if (auto mappableTy = mlir::dyn_cast<mlir::acc::MappableType>(
fir::unwrapRefType(boxTy.getEleTy()))) {
return mappableTy.getOffsetInBytes(var, accBounds, dataLayout);
}
}
// Until boxes get materialized, the offset is not evident because it is
// relative to the pointer being held.
return {};
}
template <>
llvm::SmallVector<mlir::Value>
OpenACCMappableModel<fir::SequenceType>::generateAccBounds(
mlir::Type type, mlir::Value var, mlir::OpBuilder &builder) const {
assert((mlir::isa<mlir::acc::PointerLikeType>(var.getType()) ||
mlir::isa<mlir::acc::MappableType>(var.getType())) &&
"must be pointer-like or mappable");
fir::FirOpBuilder firBuilder(builder, var.getDefiningOp());
auto seqType = mlir::cast<fir::SequenceType>(type);
mlir::Location loc = var.getLoc();
mlir::Value varPtr =
mlir::isa<mlir::acc::PointerLikeType>(var.getType())
? var
: mlir::cast<mlir::acc::MappableType>(var.getType()).getVarPtr(var);
if (seqType.hasDynamicExtents() || seqType.hasUnknownShape()) {
if (auto boxAddr =
mlir::dyn_cast_if_present<fir::BoxAddrOp>(varPtr.getDefiningOp())) {
mlir::Value box = boxAddr.getVal();
auto res =
hlfir::translateToExtendedValue(loc, firBuilder, hlfir::Entity(box));
fir::ExtendedValue exv = res.first;
mlir::Value boxRef = box;
if (auto boxPtr = getPtrFromVar(box)) {
boxRef = boxPtr;
}
// TODO: Handle Fortran optional.
const mlir::Value isPresent;
fir::factory::AddrAndBoundsInfo info(box, boxRef, isPresent,
box.getType());
return fir::factory::genBoundsOpsFromBox<mlir::acc::DataBoundsOp,
mlir::acc::DataBoundsType>(
firBuilder, loc, exv, info);
}
assert(false && "array with unknown dimension expected to have descriptor");
return {};
}
// TODO: Detect assumed-size case.
const bool isAssumedSize = false;
auto valToCheck = varPtr;
if (auto boxAddr =
mlir::dyn_cast_if_present<fir::BoxAddrOp>(varPtr.getDefiningOp())) {
valToCheck = boxAddr.getVal();
}
auto res = hlfir::translateToExtendedValue(loc, firBuilder,
hlfir::Entity(valToCheck));
fir::ExtendedValue exv = res.first;
return fir::factory::genBaseBoundsOps<mlir::acc::DataBoundsOp,
mlir::acc::DataBoundsType>(
firBuilder, loc, exv,
/*isAssumedSize=*/isAssumedSize);
}
template <>
llvm::SmallVector<mlir::Value>
OpenACCMappableModel<fir::BaseBoxType>::generateAccBounds(
mlir::Type type, mlir::Value var, mlir::OpBuilder &builder) const {
// If we have a box value instead of box reference, the intent is to
// get the bounds of the data not the bounds of the box itself.
if (auto boxTy = mlir::dyn_cast<fir::BaseBoxType>(var.getType())) {
if (auto mappableTy = mlir::dyn_cast<mlir::acc::MappableType>(
fir::unwrapRefType(boxTy.getEleTy()))) {
mlir::Value data = builder.create<fir::BoxAddrOp>(var.getLoc(), var);
return mappableTy.generateAccBounds(data, builder);
}
}
// Box references are not arrays - thus generating acc.bounds does not make
// sense.
return {};
}
} // namespace fir::acc
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