1bea0347bf
... when the derived type used in the structure constructor(s) is from another module and not use-associated into the current module. This came up in a test with a derived type component default initializer of "c_null_ptr", which is replaced with the expression "__builtin_c_ptr(address=0_8)"; the derived type name "__builtin_c_ptr" is not available in the current scope, and the module file would fail semantic analysis when USE'd. The best solution that I found was to extend module file generation to detect this case and handle it by inserting the right USE association to the ultimate derived type symbol, possibly with renaming to a compiler-created name in the case of a conflict. To implement this transformation, it was necessary to fix the utility evaluate::CollectSymbols() to include the derived type symbol from a structure constructor. This involved extending the expression traversal framework to visit the derived type spec of a structure constructor. Extending CollectSymbols() caused a lowering test to fail mysteriously, so I tracked down the code in PFTBuilder that didn't expect to see a DerivedTypeDetails symbol and dealt with it there.
103 lines
3.4 KiB
C++
103 lines
3.4 KiB
C++
//===-- lib/Semantics/mod-file.h --------------------------------*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#ifndef FORTRAN_SEMANTICS_MOD_FILE_H_
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#define FORTRAN_SEMANTICS_MOD_FILE_H_
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#include "flang/Semantics/attr.h"
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#include "flang/Semantics/symbol.h"
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#include "llvm/Support/raw_ostream.h"
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#include <string>
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namespace Fortran::parser {
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class CharBlock;
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class Message;
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class MessageFixedText;
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} // namespace Fortran::parser
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namespace llvm {
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class raw_ostream;
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}
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namespace Fortran::semantics {
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using SourceName = parser::CharBlock;
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class Symbol;
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class Scope;
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class SemanticsContext;
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class ModFileWriter {
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public:
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explicit ModFileWriter(SemanticsContext &context) : context_{context} {}
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bool WriteAll();
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private:
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SemanticsContext &context_;
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// Buffer to use with raw_string_ostream
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std::string usesBuf_;
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std::string useExtraAttrsBuf_;
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std::string declsBuf_;
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std::string containsBuf_;
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// Tracks nested DEC structures and fields of that type
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UnorderedSymbolSet emittedDECStructures_, emittedDECFields_;
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llvm::raw_string_ostream uses_{usesBuf_};
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llvm::raw_string_ostream useExtraAttrs_{
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useExtraAttrsBuf_}; // attrs added to used entity
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llvm::raw_string_ostream decls_{declsBuf_};
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llvm::raw_string_ostream contains_{containsBuf_};
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bool isSubmodule_{false};
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std::map<const Symbol *, SourceName> renamings_;
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void WriteAll(const Scope &);
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void WriteOne(const Scope &);
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void Write(const Symbol &);
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std::string GetAsString(const Symbol &);
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void PrepareRenamings(const Scope &);
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void PutSymbols(const Scope &);
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// Returns true if a derived type with bindings and "contains" was emitted
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bool PutComponents(const Symbol &);
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void PutSymbol(llvm::raw_ostream &, const Symbol &);
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void PutEntity(llvm::raw_ostream &, const Symbol &);
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void PutEntity(
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llvm::raw_ostream &, const Symbol &, std::function<void()>, Attrs);
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void PutObjectEntity(llvm::raw_ostream &, const Symbol &);
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void PutProcEntity(llvm::raw_ostream &, const Symbol &);
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void PutDerivedType(const Symbol &, const Scope * = nullptr);
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void PutDECStructure(const Symbol &, const Scope * = nullptr);
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void PutTypeParam(llvm::raw_ostream &, const Symbol &);
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void PutSubprogram(const Symbol &);
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void PutGeneric(const Symbol &);
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void PutUse(const Symbol &);
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void PutUseExtraAttr(Attr, const Symbol &, const Symbol &);
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llvm::raw_ostream &PutAttrs(llvm::raw_ostream &, Attrs,
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const std::string * = nullptr, bool = false, std::string before = ","s,
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std::string after = ""s) const;
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void PutDirective(llvm::raw_ostream &, const Symbol &);
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};
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class ModFileReader {
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public:
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// directories specifies where to search for module files
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ModFileReader(SemanticsContext &context) : context_{context} {}
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// Find and read the module file for a module or submodule.
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// If ancestor is specified, look for a submodule of that module.
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// Return the Scope for that module/submodule or nullptr on error.
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Scope *Read(const SourceName &, std::optional<bool> isIntrinsic,
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Scope *ancestor, bool silent = false);
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private:
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SemanticsContext &context_;
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parser::Message &Say(const SourceName &, const std::string &,
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parser::MessageFixedText &&, const std::string &);
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};
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} // namespace Fortran::semantics
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#endif
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