257b29715b
Summary: This is the first patch implementing the new Flang driver as outlined in [1], [2] & [3]. It creates Flang driver (`flang-new`) and Flang frontend driver (`flang-new -fc1`). These will be renamed as `flang` and `flang -fc1` once the current Flang throwaway driver, `flang`, can be replaced with `flang-new`. Currently only 2 options are supported: `-help` and `--version`. `flang-new` is implemented in terms of libclangDriver, defaulting the driver mode to `FlangMode` (added to libclangDriver in [4]). This ensures that the driver runs in Flang mode regardless of the name of the binary inferred from argv[0]. The design of the new Flang compiler and frontend drivers is inspired by it counterparts in Clang [3]. Currently, the new Flang compiler and frontend drivers re-use Clang libraries: clangBasic, clangDriver and clangFrontend. To identify Flang options, this patch adds FlangOption/FC1Option enums. Driver::printHelp is updated so that `flang-new` prints only Flang options. The new Flang driver is disabled by default. To enable it, set `-DBUILD_FLANG_NEW_DRIVER=ON` when configuring CMake and add clang to `LLVM_ENABLE_PROJECTS` (e.g. -DLLVM_ENABLE_PROJECTS=“clang;flang;mlir”). [1] “RFC: new Flang driver - next steps” http://lists.llvm.org/pipermail/flang-dev/2020-July/000470.html [2] “RFC: Adding a fortran mode to the clang driver for flang” http://lists.llvm.org/pipermail/cfe-dev/2019-June/062669.html [3] “RFC: refactoring libclangDriver/libclangFrontend to share with Flang” http://lists.llvm.org/pipermail/cfe-dev/2020-July/066393.html [4] https://reviews.llvm.org/rG6bf55804924d5a1d902925ad080b1a2b57c5c75c co-authored-by: Andrzej Warzynski <andrzej.warzynski@arm.com> Reviewed By: richard.barton.arm, sameeranjoshi Differential Revision: https://reviews.llvm.org/D86089
43 lines
1.5 KiB
C++
43 lines
1.5 KiB
C++
//===--- CompilerInstance.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/CompilerInstance.h"
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#include "flang/Frontend/CompilerInvocation.h"
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#include "clang/Frontend/TextDiagnosticPrinter.h"
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#include "llvm/Support/raw_ostream.h"
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using namespace Fortran::frontend;
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CompilerInstance::CompilerInstance() : invocation_(new CompilerInvocation()) {}
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CompilerInstance::~CompilerInstance() = default;
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void CompilerInstance::CreateDiagnostics(
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clang::DiagnosticConsumer *client, bool shouldOwnClient) {
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diagnostics_ =
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CreateDiagnostics(&GetDiagnosticOpts(), client, shouldOwnClient);
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}
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clang::IntrusiveRefCntPtr<clang::DiagnosticsEngine>
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CompilerInstance::CreateDiagnostics(clang::DiagnosticOptions *opts,
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clang::DiagnosticConsumer *client, bool shouldOwnClient) {
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clang::IntrusiveRefCntPtr<clang::DiagnosticIDs> diagID(
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new clang::DiagnosticIDs());
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clang::IntrusiveRefCntPtr<clang::DiagnosticsEngine> diags(
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new clang::DiagnosticsEngine(diagID, opts));
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// Create the diagnostic client for reporting errors or for
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// implementing -verify.
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if (client) {
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diags->setClient(client, shouldOwnClient);
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} else {
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diags->setClient(new clang::TextDiagnosticPrinter(llvm::errs(), opts));
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}
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return diags;
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}
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