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//===--- CC1Options.cpp - Clang CC1 Options Table -----------------------*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "clang/Driver/CC1Options.h"
#include "clang/Driver/ArgList.h"
#include "clang/Driver/Arg.h"
#include "clang/Driver/OptTable.h"
#include "clang/Driver/Option.h"
#include "clang/Frontend/CompilerInvocation.h"
#include "llvm/ADT/OwningPtr.h"
#include "llvm/ADT/SmallVector.h"
#include "llvm/Support/raw_ostream.h"
#include "llvm/System/Host.h"
using namespace clang::driver;
using namespace clang::driver::options;
using namespace clang::driver::cc1options;
static OptTable::Info CC1InfoTable[] = {
#define OPTION(NAME, ID, KIND, GROUP, ALIAS, FLAGS, PARAM, \
HELPTEXT, METAVAR) \
{ NAME, HELPTEXT, METAVAR, Option::KIND##Class, FLAGS, PARAM, \
OPT_##GROUP, OPT_##ALIAS },
#include "clang/Driver/CC1Options.inc"
};
namespace {
class CC1OptTable : public OptTable {
public:
CC1OptTable()
: OptTable(CC1InfoTable, sizeof(CC1InfoTable) / sizeof(CC1InfoTable[0])) {}
};
}
OptTable *clang::driver::createCC1OptTable() {
return new CC1OptTable();
}
//
using namespace clang;
static llvm::StringRef getLastArgValue(ArgList &Args, cc1options::ID ID,
llvm::StringRef Default = "") {
if (Arg *A = Args.getLastArg(ID))
return A->getValue(Args);
return Default;
}
static int getLastArgIntValue(ArgList &Args, cc1options::ID ID,
int Default = 0) {
Arg *A = Args.getLastArg(ID);
if (!A)
return Default;
int Res = Default;
// FIXME: What to do about argument parsing errors?
if (llvm::StringRef(A->getValue(Args)).getAsInteger(10, Res))
llvm::errs() << "error: invalid integral argument in '"
<< A->getAsString(Args) << "'\n";
return Res;
}
static std::vector<std::string>
getAllArgValues(ArgList &Args, cc1options::ID ID) {
llvm::SmallVector<const char *, 16> Values;
Args.AddAllArgValues(Values, ID);
return std::vector<std::string>(Values.begin(), Values.end());
}
//
static void ParseCodeGenArgs(CodeGenOptions &Opts, ArgList &Args) {
// -Os implies -O2
if (Args.hasArg(cc1options::OPT_Os))
Opts.OptimizationLevel = 2;
else
Opts.OptimizationLevel = getLastArgIntValue(Args, cc1options::OPT_O);
// FIXME: What to do about argument parsing errors?
if (Opts.OptimizationLevel > 3) {
llvm::errs() << "error: invalid optimization level '"
<< Opts.OptimizationLevel << "' (out of range)\n";
Opts.OptimizationLevel = 3;
}
// We must always run at least the always inlining pass.
Opts.Inlining = (Opts.OptimizationLevel > 1) ? CodeGenOptions::NormalInlining
: CodeGenOptions::OnlyAlwaysInlining;
Opts.DebugInfo = Args.hasArg(cc1options::OPT_g);
Opts.DisableLLVMOpts = Args.hasArg(cc1options::OPT_disable_llvm_optzns);
Opts.DisableRedZone = Args.hasArg(cc1options::OPT_disable_red_zone);
Opts.MergeAllConstants = !Args.hasArg(cc1options::OPT_fno_merge_all_constants);
Opts.NoCommon = Args.hasArg(cc1options::OPT_fno_common);
Opts.NoImplicitFloat = Args.hasArg(cc1options::OPT_no_implicit_float);
Opts.OptimizeSize = Args.hasArg(cc1options::OPT_Os);
Opts.SimplifyLibCalls = 1;
Opts.UnrollLoops = (Opts.OptimizationLevel > 1 && !Opts.OptimizeSize);
// FIXME: Implement!
// FIXME: Eliminate this dependency?
// if (Lang.NoBuiltin)
// Opts.SimplifyLibCalls = 0;
// if (Lang.CPlusPlus)
// Opts.NoCommon = 1;
// Opts.TimePasses = TimePasses;
// FIXME: Put elsewhere?
#ifdef NDEBUG
Opts.VerifyModule = 0;
#endif
}
static void ParseDependencyOutputArgs(DependencyOutputOptions &Opts,
ArgList &Args) {
Opts.OutputFile = getLastArgValue(Args, cc1options::OPT_dependency_file);
Opts.Targets = getAllArgValues(Args, cc1options::OPT_MT);
Opts.IncludeSystemHeaders = Args.hasArg(cc1options::OPT_sys_header_deps);
Opts.UsePhonyTargets = Args.hasArg(cc1options::OPT_MP);
}
static void ParseTargetArgs(TargetOptions &Opts, ArgList &Args) {
Opts.ABI = getLastArgValue(Args, cc1options::OPT_target_abi);
Opts.CPU = getLastArgValue(Args, cc1options::OPT_mcpu);
Opts.Triple = getLastArgValue(Args, cc1options::OPT_triple);
Opts.Features = getAllArgValues(Args, cc1options::OPT_target_feature);
// Use the host triple if unspecified.
if (Opts.Triple.empty())
Opts.Triple = llvm::sys::getHostTriple();
}
//
void CompilerInvocation::CreateFromArgs(CompilerInvocation &Res,
const char **ArgBegin,
const char **ArgEnd) {
// Parse the arguments.
llvm::OwningPtr<OptTable> Opts(createCC1OptTable());
unsigned MissingArgIndex, MissingArgCount;
llvm::OwningPtr<InputArgList> InputArgs(
Opts->ParseArgs(ArgBegin, ArgEnd,MissingArgIndex, MissingArgCount));
// Check for missing argument error.
if (MissingArgCount) {
// FIXME: Use proper diagnostics!
llvm::errs() << "error: argument to '"
<< InputArgs->getArgString(MissingArgIndex)
<< "' is missing (expected " << MissingArgCount
<< " value )\n";
}
ParseCodeGenArgs(Res.getCodeGenOpts(), *InputArgs);
ParseDependencyOutputArgs(Res.getDependencyOutputOpts(), *InputArgs);
ParseTargetArgs(Res.getTargetOpts(), *InputArgs);
}
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