Arg *ArgList::getLastArg(OptSpecifier Id0, OptSpecifier Id1,
OptSpecifier Id2) const {
Arg *Res = 0;
Arg *A0 = getLastArgNoClaim(Id0);
Arg *A1 = getLastArgNoClaim(Id1);
Arg *A2 = getLastArgNoClaim(Id2);
int A0Idx = A0 ? (int) A0->getIndex() : -1;
int A1Idx = A1 ? (int) A1->getIndex() : -1;
int A2Idx = A2 ? (int) A2->getIndex() : -1;
if (A0Idx > A1Idx) {
if (A0Idx > A2Idx)
Res = A0;
else if (A2Idx != -1)
Res = A2;
} else {
if (A1Idx > A2Idx)
Res = A1;
else if (A2Idx != -1)
Res = A2;
}
if (Res)
Res->claim();
return Res;
}
Arg *ArgList::getLastArg(OptSpecifier Id) const {
Arg *Res = nullptr;
for (const_iterator it = begin(), ie = end(); it != ie; ++it) {
if ((*it)->getOption().matches(Id)) {
Res = *it;
Res->claim();
}
}
return Res;
}
Arg *ArgList::getLastArg(OptSpecifier Id0, OptSpecifier Id1,
OptSpecifier Id2, OptSpecifier Id3) const {
Arg *Res = 0;
for (const_iterator it = begin(), ie = end(); it != ie; ++it) {
if ((*it)->getOption().matches(Id0) ||
(*it)->getOption().matches(Id1) ||
(*it)->getOption().matches(Id2) ||
(*it)->getOption().matches(Id3)) {
Res = *it;
Res->claim();
}
}
return Res;
}
void Driver::BuildActions(const ArgList &Args, ActionList &Actions) const {
llvm::PrettyStackTraceString CrashInfo("Building compilation actions");
// Start by constructing the list of inputs and their types.
// Track the current user specified (-x) input. We also explicitly
// track the argument used to set the type; we only want to claim
// the type when we actually use it, so we warn about unused -x
// arguments.
types::ID InputType = types::TY_Nothing;
Arg *InputTypeArg = 0;
llvm::SmallVector<std::pair<types::ID, const Arg*>, 16> Inputs;
for (ArgList::const_iterator it = Args.begin(), ie = Args.end();
it != ie; ++it) {
Arg *A = *it;
if (isa<InputOption>(A->getOption())) {
const char *Value = A->getValue(Args);
types::ID Ty = types::TY_INVALID;
// Infer the input type if necessary.
if (InputType == types::TY_Nothing) {
// If there was an explicit arg for this, claim it.
if (InputTypeArg)
InputTypeArg->claim();
// stdin must be handled specially.
if (memcmp(Value, "-", 2) == 0) {
// If running with -E, treat as a C input (this changes the
// builtin macros, for example). This may be overridden by
// -ObjC below.
//
// Otherwise emit an error but still use a valid type to
// avoid spurious errors (e.g., no inputs).
if (!Args.hasArg(options::OPT_E, false))
Diag(clang::diag::err_drv_unknown_stdin_type);
Ty = types::TY_C;
} else {
// Otherwise lookup by extension, and fallback to ObjectType
// if not found. We use a host hook here because Darwin at
// least has its own idea of what .s is.
if (const char *Ext = strrchr(Value, '.'))
Ty = Host->lookupTypeForExtension(Ext + 1);
if (Ty == types::TY_INVALID)
Ty = types::TY_Object;
}
// -ObjC and -ObjC++ override the default language, but only for "source
// files". We just treat everything that isn't a linker input as a
// source file.
//
// FIXME: Clean this up if we move the phase sequence into the type.
if (Ty != types::TY_Object) {
if (Args.hasArg(options::OPT_ObjC))
Ty = types::TY_ObjC;
else if (Args.hasArg(options::OPT_ObjCXX))
Ty = types::TY_ObjCXX;
}
} else {
assert(InputTypeArg && "InputType set w/o InputTypeArg");
InputTypeArg->claim();
Ty = InputType;
}
// Check that the file exists. It isn't clear this is worth
// doing, since the tool presumably does this anyway, and this
// just adds an extra stat to the equation, but this is gcc
// compatible.
if (memcmp(Value, "-", 2) != 0 && !llvm::sys::Path(Value).exists())
Diag(clang::diag::err_drv_no_such_file) << A->getValue(Args);
else
Inputs.push_back(std::make_pair(Ty, A));
} else if (A->getOption().isLinkerInput()) {
// Just treat as object type, we could make a special type for
// this if necessary.
Inputs.push_back(std::make_pair(types::TY_Object, A));
} else if (A->getOption().getId() == options::OPT_x) {
InputTypeArg = A;
InputType = types::lookupTypeForTypeSpecifier(A->getValue(Args));
// Follow gcc behavior and treat as linker input for invalid -x
// options. Its not clear why we shouldn't just revert to
// unknown; but this isn't very important, we might as well be
// bug comatible.
if (!InputType) {
Diag(clang::diag::err_drv_unknown_language) << A->getValue(Args);
InputType = types::TY_Object;
}
}
}
if (!SuppressMissingInputWarning && Inputs.empty()) {
Diag(clang::diag::err_drv_no_input_files);
return;
}
// Determine which compilation mode we are in. We look for options
// which affect the phase, starting with the earliest phases, and
// record which option we used to determine the final phase.
Arg *FinalPhaseArg = 0;
phases::ID FinalPhase;
// -{E,M,MM} only run the preprocessor.
if ((FinalPhaseArg = Args.getLastArg(options::OPT_E)) ||
(FinalPhaseArg = Args.getLastArg(options::OPT_M)) ||
(FinalPhaseArg = Args.getLastArg(options::OPT_MM))) {
FinalPhase = phases::Preprocess;
// -{fsyntax-only,-analyze,emit-llvm,S} only run up to the compiler.
} else if ((FinalPhaseArg = Args.getLastArg(options::OPT_fsyntax_only)) ||
(FinalPhaseArg = Args.getLastArg(options::OPT__analyze,
options::OPT__analyze_auto)) ||
(FinalPhaseArg = Args.getLastArg(options::OPT_S))) {
FinalPhase = phases::Compile;
// -c only runs up to the assembler.
} else if ((FinalPhaseArg = Args.getLastArg(options::OPT_c))) {
FinalPhase = phases::Assemble;
// Otherwise do everything.
} else
FinalPhase = phases::Link;
// Reject -Z* at the top level, these options should never have been
// exposed by gcc.
if (Arg *A = Args.getLastArg(options::OPT_Z_Joined))
Diag(clang::diag::err_drv_use_of_Z_option) << A->getAsString(Args);
// Construct the actions to perform.
ActionList LinkerInputs;
for (unsigned i = 0, e = Inputs.size(); i != e; ++i) {
types::ID InputType = Inputs[i].first;
const Arg *InputArg = Inputs[i].second;
unsigned NumSteps = types::getNumCompilationPhases(InputType);
assert(NumSteps && "Invalid number of steps!");
// If the first step comes after the final phase we are doing as
// part of this compilation, warn the user about it.
phases::ID InitialPhase = types::getCompilationPhase(InputType, 0);
if (InitialPhase > FinalPhase) {
// Claim here to avoid the more general unused warning.
InputArg->claim();
Diag(clang::diag::warn_drv_input_file_unused)
<< InputArg->getAsString(Args)
<< getPhaseName(InitialPhase)
<< FinalPhaseArg->getOption().getName();
continue;
}
// Build the pipeline for this file.
Action *Current = new InputAction(*InputArg, InputType);
for (unsigned i = 0; i != NumSteps; ++i) {
phases::ID Phase = types::getCompilationPhase(InputType, i);
// We are done if this step is past what the user requested.
if (Phase > FinalPhase)
break;
// Queue linker inputs.
if (Phase == phases::Link) {
assert(i + 1 == NumSteps && "linking must be final compilation step.");
LinkerInputs.push_back(Current);
Current = 0;
break;
}
// Some types skip the assembler phase (e.g., llvm-bc), but we
// can't encode this in the steps because the intermediate type
// depends on arguments. Just special case here.
if (Phase == phases::Assemble && Current->getType() != types::TY_PP_Asm)
continue;
// Otherwise construct the appropriate action.
Current = ConstructPhaseAction(Args, Phase, Current);
if (Current->getType() == types::TY_Nothing)
break;
}
// If we ended with something, add to the output list.
if (Current)
Actions.push_back(Current);
}
// Add a link action if necessary.
if (!LinkerInputs.empty())
Actions.push_back(new LinkJobAction(LinkerInputs, types::TY_Image));
}
void Driver::BuildUniversalActions(const ArgList &Args,
ActionList &Actions) const {
llvm::PrettyStackTraceString CrashInfo("Building actions for universal build");
// Collect the list of architectures. Duplicates are allowed, but
// should only be handled once (in the order seen).
llvm::StringSet<> ArchNames;
llvm::SmallVector<const char *, 4> Archs;
for (ArgList::const_iterator it = Args.begin(), ie = Args.end();
it != ie; ++it) {
Arg *A = *it;
if (A->getOption().getId() == options::OPT_arch) {
const char *Name = A->getValue(Args);
// FIXME: We need to handle canonicalization of the specified
// arch?
A->claim();
if (ArchNames.insert(Name))
Archs.push_back(Name);
}
}
// When there is no explicit arch for this platform, make sure we
// still bind the architecture (to the default) so that -Xarch_ is
// handled correctly.
if (!Archs.size())
Archs.push_back(0);
// FIXME: We killed off some others but these aren't yet detected in
// a functional manner. If we added information to jobs about which
// "auxiliary" files they wrote then we could detect the conflict
// these cause downstream.
if (Archs.size() > 1) {
// No recovery needed, the point of this is just to prevent
// overwriting the same files.
if (const Arg *A = Args.getLastArg(options::OPT_save_temps))
Diag(clang::diag::err_drv_invalid_opt_with_multiple_archs)
<< A->getAsString(Args);
}
ActionList SingleActions;
BuildActions(Args, SingleActions);
// Add in arch binding and lipo (if necessary) for every top level
// action.
for (unsigned i = 0, e = SingleActions.size(); i != e; ++i) {
Action *Act = SingleActions[i];
// Make sure we can lipo this kind of output. If not (and it is an
// actual output) then we disallow, since we can't create an
// output file with the right name without overwriting it. We
// could remove this oddity by just changing the output names to
// include the arch, which would also fix
// -save-temps. Compatibility wins for now.
if (Archs.size() > 1 && !types::canLipoType(Act->getType()))
Diag(clang::diag::err_drv_invalid_output_with_multiple_archs)
<< types::getTypeName(Act->getType());
ActionList Inputs;
for (unsigned i = 0, e = Archs.size(); i != e; ++i)
Inputs.push_back(new BindArchAction(Act, Archs[i]));
// Lipo if necessary, We do it this way because we need to set the
// arch flag so that -Xarch_ gets overwritten.
if (Inputs.size() == 1 || Act->getType() == types::TY_Nothing)
Actions.append(Inputs.begin(), Inputs.end());
else
Actions.push_back(new LipoJobAction(Inputs, Act->getType()));
}
}
Arg *ArgList::getLastArg(OptSpecifier Id) const {
Arg *A = getLastArgNoClaim(Id);
if (A)
A->claim();
return A;
}