Add comprehensive APIs to detect device-resident data across OpenACC
type and operation interfaces. This enables passes to identify data that
is already on the device (e.g., CUF device/managed/constant memory, GPU
address spaces) and handle it appropriately.
New interface methods:
- PointerLikeType::isDeviceData(Value): Returns true if the pointer
points to device data.
- MappableType::isDeviceData(Value): Returns true if the variable
represents device data.
- GlobalVariableOpInterface::isDeviceData(): Returns true if the global
variable is device data.
New utilities in OpenACCUtils:
- acc::isDeviceValue(Value): Checks if a value represents device data by
querying type interfaces, PartialEntityAccessOpInterface for base
entities, and AddressOfGlobalOpInterface for global symbols.
- acc::isValidValueUse(Value, Region): Checks if a value is legal in an
OpenACC region by verifying it comes from a data operation, is only used
by private clauses, or is device data.
Updated isValidSymbolUse to check
GlobalVariableOpInterface::isDeviceData()
for symbols referencing device-resident globals.
FIR implementations check for CUF data attributes (device, managed,
constant, shared, unified) on operations, block arguments, and globals.
The implementation traces through fir.rebox, fir.embox, fir.declare,
hlfir.declare, and fir.address_of to find the underlying data source.
Memref implementations check for gpu::AddressSpaceAttr on the memref
type.
Updated ACCImplicitData to use acc::isDeviceValue for generating
acc.deviceptr clauses for device-resident data instead of
copyin/copyout.
Updated OpenACCSupport::isValidValueUse to fallback to the new
acc::isValidValueUse utility.
This patch introduces FIRToMemRef, a lowering pass that converts FIR
memory operations to the MemRef dialect, including support for slices,
shifts, and descriptor-style access patterns. To support partial
lowering, where FIR and MemRef types can coexist, we extend the handling
of fir.convert to correctly marshal between FIR reference-like types and
MemRef descriptors. The patch also factors the type conversion logic
into a reusable FIRToMemRefTypeConverter, which centralizes the rules
for converting FIR types (e.g. !fir.ref, !fir.box, sequences, logicals)
to their corresponding memref types, and is used throughout the new
pass.
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Co-authored-by: Scott Manley <rscottmanley@gmail.com>
Co-authored-by: jeanPerier <jean.perier.polytechnique@gmail.com>
