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| 1 | //===-- Lower/HostAssociations.h --------------------------------*- C++ -*-===// |
|---|---|
| 2 | // |
| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| 4 | // See https://llvm.org/LICENSE.txt for license information. |
| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| 6 | // |
| 7 | //===----------------------------------------------------------------------===// |
| 8 | |
| 9 | #ifndef FORTRAN_LOWER_HOSTASSOCIATIONS_H |
| 10 | #define FORTRAN_LOWER_HOSTASSOCIATIONS_H |
| 11 | |
| 12 | #include "mlir/IR/Location.h" |
| 13 | #include "mlir/IR/Types.h" |
| 14 | #include "mlir/IR/Value.h" |
| 15 | #include "llvm/ADT/SetVector.h" |
| 16 | |
| 17 | namespace Fortran { |
| 18 | namespace semantics { |
| 19 | class Symbol; |
| 20 | class Scope; |
| 21 | } // namespace semantics |
| 22 | |
| 23 | namespace lower { |
| 24 | class AbstractConverter; |
| 25 | class SymMap; |
| 26 | |
| 27 | /// Internal procedures in Fortran may access variables declared in the host |
| 28 | /// procedure directly. We bundle these variables together in a tuple and pass |
| 29 | /// them as an extra argument. |
| 30 | class HostAssociations { |
| 31 | public: |
| 32 | /// Returns true iff there are no host associations. |
| 33 | bool empty() const { return tupleSymbols.empty() && globalSymbols.empty(); } |
| 34 | |
| 35 | /// Returns true iff there are host associations that are conveyed through |
| 36 | /// an extra tuple argument. |
| 37 | bool hasTupleAssociations() const { return !tupleSymbols.empty(); } |
| 38 | |
| 39 | /// Adds a set of Symbols that will be the host associated bindings for this |
| 40 | /// host procedure. |
| 41 | void addSymbolsToBind( |
| 42 | const llvm::SetVector<const Fortran::semantics::Symbol *> &symbols, |
| 43 | const Fortran::semantics::Scope &hostScope); |
| 44 | |
| 45 | /// Code gen the FIR for the local bindings for the host associated symbols |
| 46 | /// for the host (parent) procedure using `builder`. |
| 47 | void hostProcedureBindings(AbstractConverter &converter, SymMap &symMap); |
| 48 | |
| 49 | /// Code gen the FIR for the local bindings for the host associated symbols |
| 50 | /// for an internal (child) procedure using `builder`. |
| 51 | void internalProcedureBindings(AbstractConverter &converter, SymMap &symMap); |
| 52 | |
| 53 | /// Return the type of the extra argument to add to each internal procedure. |
| 54 | mlir::Type getArgumentType(AbstractConverter &convert); |
| 55 | |
| 56 | /// Is \p symbol host associated ? |
| 57 | bool isAssociated(const Fortran::semantics::Symbol &symbol) const { |
| 58 | return tupleSymbols.contains(&symbol) || globalSymbols.contains(&symbol); |
| 59 | } |
| 60 | |
| 61 | private: |
| 62 | /// Canonical vector of host associated local symbols. |
| 63 | llvm::SetVector<const Fortran::semantics::Symbol *> tupleSymbols; |
| 64 | |
| 65 | /// Canonical vector of host associated global symbols. |
| 66 | llvm::SetVector<const Fortran::semantics::Symbol *> globalSymbols; |
| 67 | |
| 68 | /// The type of the extra argument to be added to each internal procedure. |
| 69 | mlir::Type argType; |
| 70 | |
| 71 | /// Scope of the parent procedure if addSymbolsToBind was called. |
| 72 | const Fortran::semantics::Scope *hostScope; |
| 73 | }; |
| 74 | } // namespace lower |
| 75 | } // namespace Fortran |
| 76 | |
| 77 | #endif // FORTRAN_LOWER_HOSTASSOCIATIONS_H |
| 78 |
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