e5cdb6c56e
This patch adds a frontend action for emitting object files. While Flang does not support code-generation, this action remains a placeholder. This patch simply provides glue-code to connect the compiler driver with the appropriate frontend action. The new action is triggered with the `-c` compiler driver flag, i.e. `flang-new -c`. This is then translated to `flang-new -fc1 -emit-obj`, so `-emit-obj` has to be marked as supported as well. As code-generation is not available yet, `flang-new -c` results in a driver error: ``` error: code-generation is not available yet ``` Hopefully this will help communicating the level of available functionality within Flang. The definition of `emit-obj` is updated so that it can be shared between Clang and Flang. As the original definition was enclosed within a Clang-specific TableGen `let` statement, it is extracted into a new `let` statement. That felt like the cleanest option. I also commented out `-triple` in Flang::ConstructJob and updated some comments there. This is similar to https://reviews.llvm.org/D93027. I wanted to make sure that it's clear that we can't support `-triple` until we have code-generation. However, once code-generation is available we _will need_ `-triple`. As this patch adds `-emit-obj`, the emit-obj.f90 becomes irrelevant and is deleted. Instead, phases.f90 is added to demonstrate that users can control compilation phases (indeed, `-c` is a phase control flag). Reviewed By: SouraVX, clementval Differential Revision: https://reviews.llvm.org/D93301
88 lines
2.6 KiB
C++
88 lines
2.6 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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case ParseSyntaxOnly:
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return std::make_unique<ParseSyntaxOnlyAction>();
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case EmitObj:
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return std::make_unique<EmitObjAction>();
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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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