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
83 lines
2.4 KiB
C++
83 lines
2.4 KiB
C++
//===--- ExecuteCompilerInvocation.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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//
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// This file holds ExecuteCompilerInvocation(). It is split into its own file to
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// minimize the impact of pulling in essentially everything else in Flang.
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//
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//===----------------------------------------------------------------------===//
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#include "flang/Frontend/CompilerInstance.h"
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#include "flang/Frontend/FrontendActions.h"
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#include "clang/Driver/Options.h"
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#include "llvm/Option/OptTable.h"
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#include "llvm/Option/Option.h"
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#include "llvm/Support/BuryPointer.h"
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#include "llvm/Support/CommandLine.h"
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namespace Fortran::frontend {
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static std::unique_ptr<FrontendAction> CreateFrontendBaseAction(
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CompilerInstance &ci) {
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ActionKind ak = ci.frontendOpts().programAction_;
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switch (ak) {
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case InputOutputTest:
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return std::make_unique<InputOutputTestAction>();
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break;
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case PrintPreprocessedInput:
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return std::make_unique<PrintPreprocessedAction>();
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break;
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default:
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break;
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// TODO:
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// case RunPreprocessor:
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// case ParserSyntaxOnly:
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// case EmitLLVM:
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// case EmitLLVMOnly:
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// case EmitCodeGenOnly:
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// (...)
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}
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return 0;
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}
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std::unique_ptr<FrontendAction> CreateFrontendAction(CompilerInstance &ci) {
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// Create the underlying action.
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std::unique_ptr<FrontendAction> act = CreateFrontendBaseAction(ci);
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if (!act)
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return nullptr;
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return act;
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}
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bool ExecuteCompilerInvocation(CompilerInstance *flang) {
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// Honor -help.
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if (flang->frontendOpts().showHelp_) {
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clang::driver::getDriverOptTable().PrintHelp(llvm::outs(),
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"flang-new -fc1 [options] file...", "LLVM 'Flang' Compiler",
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/*Include=*/clang::driver::options::FC1Option,
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/*Exclude=*/llvm::opt::DriverFlag::HelpHidden,
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/*ShowAllAliases=*/false);
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return true;
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}
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// Honor -version.
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if (flang->frontendOpts().showVersion_) {
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llvm::cl::PrintVersionMessage();
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return true;
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}
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// Create and execute the frontend action.
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std::unique_ptr<FrontendAction> act(CreateFrontendAction(*flang));
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if (!act)
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return false;
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bool success = flang->ExecuteAction(*act);
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return success;
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}
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} // namespace Fortran::frontend
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