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//===-- Main.cpp - LLVM-based Fortran Compiler ----------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// The Fortran Compiler.
//
//===----------------------------------------------------------------------===//
#include "flang/Frontend/TextDiagnosticPrinter.h"
#include "flang/Parse/Parser.h"
#include "flang/Sema/Sema.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/ManagedStatic.h"
#include "llvm/Support/MemoryBuffer.h"
#include "llvm/Support/Path.h"
#include "llvm/Support/PrettyStackTrace.h"
#include "llvm/Support/raw_ostream.h"
#include "llvm/Support/Signals.h"
#include "llvm/Support/SourceMgr.h"
#include "llvm/Support/Timer.h"
#include "llvm/Support/system_error.h"
#include "llvm/ADT/OwningPtr.h"
using namespace llvm;
using namespace flang;
llvm::sys::Path GetExecutablePath(const char *Argv0, bool CanonicalPrefixes) {
if (!CanonicalPrefixes)
return llvm::sys::Path(Argv0);
// This just needs to be some symbol in the binary; C++ doesn't
// allow taking the address of ::main however.
void *P = (void*) (intptr_t) GetExecutablePath;
return llvm::sys::Path::GetMainExecutable(Argv0, P);
}
//===----------------------------------------------------------------------===//
// Command line options.
//===----------------------------------------------------------------------===//
namespace {
cl::opt<std::string>
InputFilename(cl::Positional, cl::desc("<input file>"), cl::init("-"));
cl::list<std::string>
IncludeDirs("I", cl::desc("Directory of include files"),
cl::value_desc("directory"), cl::Prefix);
cl::opt<bool>
ReturnComments("C", cl::desc("Do not discard comments"), cl::init(false));
} // end anonymous namespace
static bool ParseFile(const std::string &Filename,
const std::vector<std::string> &IncludeDirs) {
llvm::OwningPtr<llvm::MemoryBuffer> MB;
if (llvm::error_code ec = llvm::MemoryBuffer::getFileOrSTDIN(Filename.c_str(),
MB)) {
llvm::errs() << "Could not open input file '" << Filename << "': "
<< ec.message() <<"\n";
return true;
}
// Record the location of the include directory so that the lexer can find it
// later.
SourceMgr SrcMgr;
SrcMgr.setIncludeDirs(IncludeDirs);
// Tell SrcMgr about this buffer, which is what Parser will pick up.
SrcMgr.AddNewSourceBuffer(MB.take(), SMLoc());
LangOptions Opts;
Opts.ReturnComments = ReturnComments;
TextDiagnosticPrinter TDP(SrcMgr);
Diagnostic Diag(&SrcMgr, &TDP, false);
#if 0
PrintAction PA(Diag);
#endif
ASTContext Context(SrcMgr);
Sema SA(Context, Diag);
Parser P(SrcMgr, Opts, Diag, SA);
return P.ParseProgramUnits();
}
int main(int argc, char **argv) {
sys::PrintStackTraceOnErrorSignal();
PrettyStackTraceProgram X(argc, argv);
cl::ParseCommandLineOptions(argc, argv, "LLVM Fortran compiler");
bool CanonicalPrefixes = true;
for (int i = 1; i < argc; ++i)
if (llvm::StringRef(argv[i]) == "-no-canonical-prefixes") {
CanonicalPrefixes = false;
break;
}
llvm::sys::Path Path = GetExecutablePath(argv[0], CanonicalPrefixes);
// Parse the input file.
int Res = ParseFile(InputFilename, IncludeDirs);
// If any timers were active but haven't been destroyed yet, print their
// results now. This happens in -disable-free mode.
llvm::TimerGroup::printAll(llvm::errs());
llvm::llvm_shutdown();
return Res;
}
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