//===--- ExecuteCompilerInvocation.cpp ------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// This file holds ExecuteCompilerInvocation(). It is split into its own file to
// minimize the impact of pulling in essentially everything else in Flang.
//
//===----------------------------------------------------------------------===//
//
// Coding style: https://mlir.llvm.org/getting_started/DeveloperGuide/
//
//===----------------------------------------------------------------------===//
#include "flang/Frontend/CompilerInstance.h"
#include "flang/Frontend/FrontendActions.h"
#include "flang/Frontend/FrontendPluginRegistry.h"
#include "mlir/IR/AsmState.h"
#include "mlir/IR/MLIRContext.h"
#include "mlir/Pass/PassManager.h"
#include "clang/Basic/DiagnosticFrontend.h"
#include "clang/Driver/Options.h"
#include "llvm/Option/OptTable.h"
#include "llvm/Option/Option.h"
#include "llvm/Support/BuryPointer.h"
#include "llvm/Support/CommandLine.h"
namespace Fortran::frontend {
static std::unique_ptr<FrontendAction>
createFrontendAction(CompilerInstance &ci) {
switch (ci.getFrontendOpts().programAction) {
case InputOutputTest:
return std::make_unique<InputOutputTestAction>();
case PrintPreprocessedInput:
return std::make_unique<PrintPreprocessedAction>();
case ParseSyntaxOnly:
return std::make_unique<ParseSyntaxOnlyAction>();
case EmitFIR:
return std::make_unique<EmitFIRAction>();
case EmitHLFIR:
return std::make_unique<EmitHLFIRAction>();
case EmitLLVM:
return std::make_unique<EmitLLVMAction>();
case EmitLLVMBitcode:
return std::make_unique<EmitLLVMBitcodeAction>();
case EmitObj:
return std::make_unique<EmitObjAction>();
case EmitAssembly:
return std::make_unique<EmitAssemblyAction>();
case DebugUnparse:
return std::make_unique<DebugUnparseAction>();
case DebugUnparseNoSema:
return std::make_unique<DebugUnparseNoSemaAction>();
case DebugUnparseWithSymbols:
return std::make_unique<DebugUnparseWithSymbolsAction>();
case DebugUnparseWithModules:
return std::make_unique<DebugUnparseWithModulesAction>();
case DebugDumpSymbols:
return std::make_unique<DebugDumpSymbolsAction>();
case DebugDumpParseTree:
return std::make_unique<DebugDumpParseTreeAction>();
case DebugDumpPFT:
return std::make_unique<DebugDumpPFTAction>();
case DebugDumpParseTreeNoSema:
return std::make_unique<DebugDumpParseTreeNoSemaAction>();
case DebugDumpAll:
return std::make_unique<DebugDumpAllAction>();
case DebugDumpProvenance:
return std::make_unique<DebugDumpProvenanceAction>();
case DebugDumpParsingLog:
return std::make_unique<DebugDumpParsingLogAction>();
case DebugMeasureParseTree:
return std::make_unique<DebugMeasureParseTreeAction>();
case DebugPreFIRTree:
return std::make_unique<DebugPreFIRTreeAction>();
case GetDefinition:
return std::make_unique<GetDefinitionAction>();
case GetSymbolsSources:
return std::make_unique<GetSymbolsSourcesAction>();
case InitOnly:
return std::make_unique<InitOnlyAction>();
case PluginAction: {
for (const FrontendPluginRegistry::entry &plugin :
FrontendPluginRegistry::entries()) {
if (plugin.getName() == ci.getFrontendOpts().actionName) {
std::unique_ptr<PluginParseTreeAction> p(plugin.instantiate());
return std::move(p);
}
}
unsigned diagID = ci.getDiagnostics().getCustomDiagID(
clang::DiagnosticsEngine::Error, "unable to find plugin '%0'");
ci.getDiagnostics().Report(diagID) << ci.getFrontendOpts().actionName;
return nullptr;
}
}
llvm_unreachable("Invalid program action!");
}
static void emitUnknownDiagWarning(clang::DiagnosticsEngine &diags,
clang::diag::Flavor flavor,
llvm::StringRef prefix,
llvm::StringRef opt) {
llvm::StringRef suggestion =
clang::DiagnosticIDs::getNearestOption(flavor, opt);
diags.Report(clang::diag::warn_unknown_diag_option)
<< (flavor == clang::diag::Flavor::WarningOrError ? 0 : 1)
<< (prefix.str() += std::string(opt)) << !suggestion.empty()
<< (prefix.str() += std::string(suggestion));
}
// Remarks are ignored by default in Diagnostic.td, hence, we have to
// enable them here before execution. Clang follows same idea using
// ProcessWarningOptions in Warnings.cpp
// This function is also responsible for emitting early warnings for
// invalid -R options.
static void
updateDiagEngineForOptRemarks(clang::DiagnosticsEngine &diagsEng,
const clang::DiagnosticOptions &opts) {
llvm::SmallVector<clang::diag::kind, 10> diags;
const llvm::IntrusiveRefCntPtr<clang::DiagnosticIDs> diagIDs =
diagsEng.getDiagnosticIDs();
for (unsigned i = 0; i < opts.Remarks.size(); i++) {
llvm::StringRef remarkOpt = opts.Remarks[i];
const auto flavor = clang::diag::Flavor::Remark;
// Check to see if this opt starts with "no-", if so, this is a
// negative form of the option.
bool isPositive = !remarkOpt.starts_with("no-");
if (!isPositive)
remarkOpt = remarkOpt.substr(3);
// Verify that this is a valid optimization remarks option
if (diagIDs->getDiagnosticsInGroup(flavor, remarkOpt, diags)) {
emitUnknownDiagWarning(diagsEng, flavor, isPositive ? "-R" : "-Rno-",
remarkOpt);
return;
}
diagsEng.setSeverityForGroup(flavor, remarkOpt,
isPositive ? clang::diag::Severity::Remark
: clang::diag::Severity::Ignored);
}
}
bool executeCompilerInvocation(CompilerInstance *flang) {
// Honor -help.
if (flang->getFrontendOpts().showHelp) {
clang::driver::getDriverOptTable().printHelp(
llvm::outs(), "flang-new -fc1 [options] file...",
"LLVM 'Flang' Compiler",
/*ShowHidden=*/false, /*ShowAllAliases=*/false,
llvm::opt::Visibility(clang::driver::options::FC1Option));
return true;
}
// Honor -version.
if (flang->getFrontendOpts().showVersion) {
llvm::cl::PrintVersionMessage();
return true;
}
// Load any requested plugins.
for (const std::string &path : flang->getFrontendOpts().plugins) {
std::string error;
if (llvm::sys::DynamicLibrary::LoadLibraryPermanently(path.c_str(),
&error)) {
unsigned diagID = flang->getDiagnostics().getCustomDiagID(
clang::DiagnosticsEngine::Error, "unable to load plugin '%0': '%1'");
flang->getDiagnostics().Report(diagID) << path << error;
}
}
// Honor -mllvm. This should happen AFTER plugins have been loaded!
if (!flang->getFrontendOpts().llvmArgs.empty()) {
unsigned numArgs = flang->getFrontendOpts().llvmArgs.size();
auto args = std::make_unique<const char *[]>(numArgs + 2);
args[0] = "flang (LLVM option parsing)";
for (unsigned i = 0; i != numArgs; ++i)
args[i + 1] = flang->getFrontendOpts().llvmArgs[i].c_str();
args[numArgs + 1] = nullptr;
llvm::cl::ParseCommandLineOptions(numArgs + 1, args.get());
}
// Honor -mmlir. This should happen AFTER plugins have been loaded!
if (!flang->getFrontendOpts().mlirArgs.empty()) {
mlir::registerMLIRContextCLOptions();
mlir::registerPassManagerCLOptions();
mlir::registerAsmPrinterCLOptions();
unsigned numArgs = flang->getFrontendOpts().mlirArgs.size();
auto args = std::make_unique<const char *[]>(numArgs + 2);
args[0] = "flang (MLIR option parsing)";
for (unsigned i = 0; i != numArgs; ++i)
args[i + 1] = flang->getFrontendOpts().mlirArgs[i].c_str();
args[numArgs + 1] = nullptr;
llvm::cl::ParseCommandLineOptions(numArgs + 1, args.get());
}
// If there were errors in processing arguments, don't do anything else.
if (flang->getDiagnostics().hasErrorOccurred()) {
return false;
}
updateDiagEngineForOptRemarks(flang->getDiagnostics(),
flang->getDiagnosticOpts());
// Create and execute the frontend action.
std::unique_ptr<FrontendAction> act(createFrontendAction(*flang));
if (!act)
return false;
bool success = flang->executeAction(*act);
return success;
}
} // namespace Fortran::frontend
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