1 //===--- ExecuteCompilerInvocation.cpp ------------------------------------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 //
9 // This file holds ExecuteCompilerInvocation(). It is split into its own file to
10 // minimize the impact of pulling in essentially everything else in Flang.
11 //
12 //===----------------------------------------------------------------------===//
13 
14 #include "flang/Frontend/CompilerInstance.h"
15 #include "flang/Frontend/FrontendActions.h"
16 #include "clang/Driver/Options.h"
17 #include "llvm/Option/OptTable.h"
18 #include "llvm/Option/Option.h"
19 #include "llvm/Support/BuryPointer.h"
20 #include "llvm/Support/CommandLine.h"
21 
22 namespace Fortran::frontend {
23 
CreateFrontendBaseAction(CompilerInstance & ci)24 static std::unique_ptr<FrontendAction> CreateFrontendBaseAction(
25     CompilerInstance &ci) {
26 
27   ActionKind ak = ci.frontendOpts().programAction_;
28   switch (ak) {
29   case InputOutputTest:
30     return std::make_unique<InputOutputTestAction>();
31     break;
32   case PrintPreprocessedInput:
33     return std::make_unique<PrintPreprocessedAction>();
34     break;
35   case ParseSyntaxOnly:
36     return std::make_unique<ParseSyntaxOnlyAction>();
37   case EmitObj:
38     return std::make_unique<EmitObjAction>();
39     break;
40   default:
41     break;
42     // TODO:
43     // case RunPreprocessor:
44     // case ParserSyntaxOnly:
45     // case EmitLLVM:
46     // case EmitLLVMOnly:
47     // case EmitCodeGenOnly:
48     // (...)
49   }
50   return 0;
51 }
52 
CreateFrontendAction(CompilerInstance & ci)53 std::unique_ptr<FrontendAction> CreateFrontendAction(CompilerInstance &ci) {
54   // Create the underlying action.
55   std::unique_ptr<FrontendAction> act = CreateFrontendBaseAction(ci);
56   if (!act)
57     return nullptr;
58 
59   return act;
60 }
ExecuteCompilerInvocation(CompilerInstance * flang)61 bool ExecuteCompilerInvocation(CompilerInstance *flang) {
62   // Honor -help.
63   if (flang->frontendOpts().showHelp_) {
64     clang::driver::getDriverOptTable().PrintHelp(llvm::outs(),
65         "flang-new -fc1 [options] file...", "LLVM 'Flang' Compiler",
66         /*Include=*/clang::driver::options::FC1Option,
67         /*Exclude=*/llvm::opt::DriverFlag::HelpHidden,
68         /*ShowAllAliases=*/false);
69     return true;
70   }
71 
72   // Honor -version.
73   if (flang->frontendOpts().showVersion_) {
74     llvm::cl::PrintVersionMessage();
75     return true;
76   }
77 
78   // Create and execute the frontend action.
79   std::unique_ptr<FrontendAction> act(CreateFrontendAction(*flang));
80   if (!act)
81     return false;
82 
83   bool success = flang->ExecuteAction(*act);
84   return success;
85 }
86 
87 } // namespace Fortran::frontend
88