d28de0d7f2
This patch implements the first frontend action for the Flang parser (i.e.
Fortran::parser). This action runs the preprocessor and is invoked with the
`-E` flag. (i.e. `flang-new -E <input-file>). The generated output is printed
to either stdout or the output file (specified with `-` or `-o <output-file>`).
Note that currently there is no mechanism to map options for the
frontend driver (i.e. Fortran::frontend::FrontendOptions) to options for
the parser (i.e. Fortran::parser::Options). Instead,
Frotran::parser::options are hard-coded to:
```
std::vector<std::string> searchDirectories{"."s};
searchDirectories = searchDirectories;
isFixedForm = false;
_encoding(Fortran::parser::Encoding::UTF_8);
```
These default settings are compatible with the current Flang driver. Further
work is required in order for CompilerInvocation to read and map
clang::driver::options to Fortran::parser::options.
Co-authored-by: Andrzej Warzynski <andrzej.warzynski@arm.com>
Differential Revision: https://reviews.llvm.org/D88381
71 lines
2.2 KiB
C++
71 lines
2.2 KiB
C++
//===--- FrontendActions.cpp ----------------------------------------------===//
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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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#include "flang/Frontend/FrontendActions.h"
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#include "flang/Frontend/CompilerInstance.h"
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#include "flang/Parser/parsing.h"
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#include "flang/Parser/provenance.h"
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#include "flang/Parser/source.h"
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using namespace Fortran::frontend;
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void InputOutputTestAction::ExecuteAction() {
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// Get the name of the file from FrontendInputFile current.
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std::string path{GetCurrentFileOrBufferName()};
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std::string buf;
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llvm::raw_string_ostream error_stream{buf};
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bool binaryMode = true;
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// Set/store input file info into CompilerInstance.
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CompilerInstance &ci = instance();
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Fortran::parser::AllSources &allSources{ci.allSources()};
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const Fortran::parser::SourceFile *sf;
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sf = allSources.Open(path, error_stream);
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llvm::ArrayRef<char> fileContent = sf->content();
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// Output file descriptor to receive the content of input file.
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std::unique_ptr<llvm::raw_ostream> os;
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// Do not write on the output file if using outputStream_.
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if (ci.IsOutputStreamNull()) {
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os = ci.CreateDefaultOutputFile(
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binaryMode, GetCurrentFileOrBufferName(), "txt");
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if (!os)
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return;
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(*os) << fileContent.data();
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} else {
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ci.WriteOutputStream(fileContent.data());
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}
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}
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void PrintPreprocessedAction::ExecuteAction() {
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std::string buf;
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llvm::raw_string_ostream outForPP{buf};
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// Run the preprocessor
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CompilerInstance &ci = this->instance();
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ci.parsing().DumpCookedChars(outForPP);
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// If a pre-defined output stream exists, dump the preprocessed content there
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if (!ci.IsOutputStreamNull()) {
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// Send the output to the pre-defined output buffer.
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ci.WriteOutputStream(outForPP.str());
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return;
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}
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// Create a file and save the preprocessed output there
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if (auto os{ci.CreateDefaultOutputFile(
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/*Binary=*/true, /*InFile=*/GetCurrentFileOrBufferName())}) {
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(*os) << outForPP.str();
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} else {
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llvm::errs() << "Unable to create the output file\n";
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return;
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}
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}
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