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88f356e16b
teak-llvm/clang/lib/Driver/Driver.cpp
Daniel Dunbar 88f356e16b Driver: Change default use of "clang" compiler. 
- Don't default to using clang for C++ (use -ccc-clang-cxx to
   override).

 - Default to only using clang on i386 and x86_64 (use
   -ccc-clang-archs "" to override).

 - <rdar://problem/6712350> [driver] clang should not be used on
   powerpc by default
 - <rdar://problem/6705767> driver should default to -ccc-no-clang-cxx

I plan to add a warning that we are not using the clang compiler for
the given compilation so that users do not think clang is being used
in situations it isn't.

This change is motivated by the desire to be able to drop clang into a
build and have things "just work", even if it happens to get used to
compile C++ code or code for an architecture we don't support yet.

llvm-svn: 67640
2009-03-24 19:02:31 +00:00

1017 lines
34 KiB
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//===--- Driver.cpp - Clang GCC Compatible Driver -----------------------*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "clang/Driver/Driver.h"
#include "clang/Driver/Action.h"
#include "clang/Driver/Arg.h"
#include "clang/Driver/ArgList.h"
#include "clang/Driver/Compilation.h"
#include "clang/Driver/DriverDiagnostic.h"
#include "clang/Driver/HostInfo.h"
#include "clang/Driver/Job.h"
#include "clang/Driver/Option.h"
#include "clang/Driver/Options.h"
#include "clang/Driver/Tool.h"
#include "clang/Driver/ToolChain.h"
#include "clang/Driver/Types.h"
#include "llvm/ADT/StringSet.h"
#include "llvm/Support/PrettyStackTrace.h"
#include "llvm/Support/raw_ostream.h"
#include "llvm/System/Path.h"
#include "llvm/System/Program.h"
#include "InputInfo.h"
#include <map>
using namespace clang::driver;
Driver::Driver(const char *_Name, const char *_Dir,
const char *_DefaultHostTriple,
const char *_DefaultImageName,
Diagnostic &_Diags)
: Opts(new OptTable()), Diags(_Diags),
Name(_Name), Dir(_Dir), DefaultHostTriple(_DefaultHostTriple),
DefaultImageName(_DefaultImageName),
Host(0),
CCCIsCXX(false), CCCEcho(false), CCCPrintBindings(false),
CCCUseClang(true), CCCUseClangCXX(false), CCCUseClangCPP(true),
SuppressMissingInputWarning(false)
{
// Only use clang on i386 and x86_64 by default.
CCCClangArchs.insert("i386");
CCCClangArchs.insert("x86_64");
}
Driver::~Driver() {
delete Opts;
delete Host;
}
ArgList *Driver::ParseArgStrings(const char **ArgBegin, const char **ArgEnd) {
llvm::PrettyStackTraceString CrashInfo("Command line argument parsing");
ArgList *Args = new ArgList(ArgBegin, ArgEnd);
// FIXME: Handle '@' args (or at least error on them).
unsigned Index = 0, End = ArgEnd - ArgBegin;
while (Index < End) {
// gcc's handling of empty arguments doesn't make
// sense, but this is not a common use case. :)
//
// We just ignore them here (note that other things may
// still take them as arguments).
if (Args->getArgString(Index)[0] == '\0') {
++Index;
continue;
}
unsigned Prev = Index;
Arg *A = getOpts().ParseOneArg(*Args, Index);
assert(Index > Prev && "Parser failed to consume argument.");
// Check for missing argument error.
if (!A) {
assert(Index >= End && "Unexpected parser error.");
Diag(clang::diag::err_drv_missing_argument)
<< Args->getArgString(Prev)
<< (Index - Prev - 1);
break;
}
if (A->getOption().isUnsupported()) {
Diag(clang::diag::err_drv_unsupported_opt) << A->getAsString(*Args);
continue;
}
Args->append(A);
}
return Args;
}
Compilation *Driver::BuildCompilation(int argc, const char **argv) {
llvm::PrettyStackTraceString CrashInfo("Compilation construction");
// FIXME: Handle environment options which effect driver behavior,
// somewhere (client?). GCC_EXEC_PREFIX, COMPILER_PATH,
// LIBRARY_PATH, LPATH, CC_PRINT_OPTIONS, QA_OVERRIDE_GCC3_OPTIONS.
// FIXME: What are we going to do with -V and -b?
// FIXME: Handle CCC_ADD_ARGS.
// FIXME: This stuff needs to go into the Compilation, not the
// driver.
bool CCCPrintOptions = false, CCCPrintActions = false;
const char **Start = argv + 1, **End = argv + argc;
const char *HostTriple = DefaultHostTriple.c_str();
// Read -ccc args.
//
// FIXME: We need to figure out where this behavior should
// live. Most of it should be outside in the client; the parts that
// aren't should have proper options, either by introducing new ones
// or by overloading gcc ones like -V or -b.
for (; Start != End && memcmp(*Start, "-ccc-", 5) == 0; ++Start) {
const char *Opt = *Start + 5;
if (!strcmp(Opt, "print-options")) {
CCCPrintOptions = true;
} else if (!strcmp(Opt, "print-phases")) {
CCCPrintActions = true;
} else if (!strcmp(Opt, "print-bindings")) {
CCCPrintBindings = true;
} else if (!strcmp(Opt, "cxx")) {
CCCIsCXX = true;
} else if (!strcmp(Opt, "echo")) {
CCCEcho = true;
} else if (!strcmp(Opt, "clang-cxx")) {
CCCUseClangCXX = true;
} else if (!strcmp(Opt, "no-clang")) {
CCCUseClang = false;
} else if (!strcmp(Opt, "no-clang-cpp")) {
CCCUseClangCPP = false;
} else if (!strcmp(Opt, "clang-archs")) {
assert(Start+1 < End && "FIXME: -ccc- argument handling.");
const char *Cur = *++Start;
CCCClangArchs.clear();
for (;;) {
const char *Next = strchr(Cur, ',');
if (Next) {
if (Cur != Next)
CCCClangArchs.insert(std::string(Cur, Next));
Cur = Next + 1;
} else {
if (*Cur != '\0')
CCCClangArchs.insert(std::string(Cur));
break;
}
}
} else if (!strcmp(Opt, "host-triple")) {
assert(Start+1 < End && "FIXME: -ccc- argument handling.");
HostTriple = *++Start;
} else {
// FIXME: Error handling.
llvm::errs() << "invalid option: " << *Start << "\n";
exit(1);
}
}
ArgList *Args = ParseArgStrings(Start, End);
Host = GetHostInfo(HostTriple);
// The compilation takes ownership of Args.
Compilation *C = new Compilation(*this, *Host->getToolChain(*Args), Args);
// FIXME: This behavior shouldn't be here.
if (CCCPrintOptions) {
PrintOptions(C->getArgs());
return C;
}
if (!HandleImmediateArgs(*C))
return C;
// Construct the list of abstract actions to perform for this
// compilation. We avoid passing a Compilation here simply to
// enforce the abstraction that pipelining is not host or toolchain
// dependent (other than the driver driver test).
if (Host->useDriverDriver())
BuildUniversalActions(C->getArgs(), C->getActions());
else
BuildActions(C->getArgs(), C->getActions());
if (CCCPrintActions) {
PrintActions(*C);
return C;
}
BuildJobs(*C);
return C;
}
void Driver::PrintOptions(const ArgList &Args) const {
unsigned i = 0;
for (ArgList::const_iterator it = Args.begin(), ie = Args.end();
it != ie; ++it, ++i) {
Arg *A = *it;
llvm::errs() << "Option " << i << " - "
<< "Name: \"" << A->getOption().getName() << "\", "
<< "Values: {";
for (unsigned j = 0; j < A->getNumValues(); ++j) {
if (j)
llvm::errs() << ", ";
llvm::errs() << '"' << A->getValue(Args, j) << '"';
}
llvm::errs() << "}\n";
}
}
void Driver::PrintVersion() const {
static char buf[] = "$URL$";
char *zap = strstr(buf, "/lib/Driver");
if (zap)
*zap = 0;
zap = strstr(buf, "/clang/tools/clang");
if (zap)
*zap = 0;
const char *vers = buf+6;
// FIXME: Add cmake support and remove #ifdef
#ifdef SVN_REVISION
const char *revision = SVN_REVISION;
#else
const char *revision = "";
#endif
// FIXME: The following handlers should use a callback mechanism, we
// don't know what the client would like to do.
llvm::errs() << "clang version 1.0 (" << vers << " " << revision << ")" << "\n";
// FIXME: Add cmake support and remove #ifdef
#ifdef TARGET_TRIPLE
llvm::errs() << "Target: " << TARGET_TRIPLE << "\n";
#endif
}
bool Driver::HandleImmediateArgs(const Compilation &C) {
// The order these options are handled in in gcc is all over the
// place, but we don't expect inconsistencies w.r.t. that to matter
// in practice.
if (C.getArgs().hasArg(options::OPT_v) ||
C.getArgs().hasArg(options::OPT__HASH_HASH_HASH)) {
PrintVersion();
SuppressMissingInputWarning = true;
}
const ToolChain &TC = C.getDefaultToolChain();
if (C.getArgs().hasArg(options::OPT_print_search_dirs)) {
llvm::outs() << "programs: =";
for (ToolChain::path_list::const_iterator it = TC.getProgramPaths().begin(),
ie = TC.getProgramPaths().end(); it != ie; ++it) {
if (it != TC.getProgramPaths().begin())
llvm::outs() << ':';
llvm::outs() << *it;
}
llvm::outs() << "\n";
llvm::outs() << "libraries: =";
for (ToolChain::path_list::const_iterator it = TC.getFilePaths().begin(),
ie = TC.getFilePaths().end(); it != ie; ++it) {
if (it != TC.getFilePaths().begin())
llvm::outs() << ':';
llvm::outs() << *it;
}
llvm::outs() << "\n";
}
// FIXME: The following handlers should use a callback mechanism, we
// don't know what the client would like to do.
if (Arg *A = C.getArgs().getLastArg(options::OPT_print_file_name_EQ)) {
llvm::outs() << GetFilePath(A->getValue(C.getArgs()), TC).toString()
<< "\n";
return false;
}
if (Arg *A = C.getArgs().getLastArg(options::OPT_print_prog_name_EQ)) {
llvm::outs() << GetProgramPath(A->getValue(C.getArgs()), TC).toString()
<< "\n";
return false;
}
if (C.getArgs().hasArg(options::OPT_print_libgcc_file_name)) {
llvm::outs() << GetProgramPath("libgcc.a", TC).toString() << "\n";
return false;
}
return true;
}
static unsigned PrintActions1(const Compilation &C,
Action *A,
std::map<Action*, unsigned> &Ids) {
if (Ids.count(A))
return Ids[A];
std::string str;
llvm::raw_string_ostream os(str);
os << Action::getClassName(A->getKind()) << ", ";
if (InputAction *IA = dyn_cast<InputAction>(A)) {
os << "\"" << IA->getInputArg().getValue(C.getArgs()) << "\"";
} else if (BindArchAction *BIA = dyn_cast<BindArchAction>(A)) {
os << '"' << (BIA->getArchName() ? BIA->getArchName() :
C.getDefaultToolChain().getArchName()) << '"'
<< ", {" << PrintActions1(C, *BIA->begin(), Ids) << "}";
} else {
os << "{";
for (Action::iterator it = A->begin(), ie = A->end(); it != ie;) {
os << PrintActions1(C, *it, Ids);
++it;
if (it != ie)
os << ", ";
}
os << "}";
}
unsigned Id = Ids.size();
Ids[A] = Id;
llvm::errs() << Id << ": " << os.str() << ", "
<< types::getTypeName(A->getType()) << "\n";
return Id;
}
void Driver::PrintActions(const Compilation &C) const {
std::map<Action*, unsigned> Ids;
for (ActionList::const_iterator it = C.getActions().begin(),
ie = C.getActions().end(); it != ie; ++it)
PrintActions1(C, *it, Ids);
}
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_M_Group))
Diag(clang::diag::err_drv_invalid_opt_with_multiple_archs)
<< A->getAsString(Args);
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()));
}
}
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)) ||
(FinalPhaseArg = Args.getLastArg(options::OPT_emit_llvm)) ||
(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))
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;
}
// 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));
}
Action *Driver::ConstructPhaseAction(const ArgList &Args, phases::ID Phase,
Action *Input) const {
llvm::PrettyStackTraceString CrashInfo("Constructing phase actions");
// Build the appropriate action.
switch (Phase) {
case phases::Link: assert(0 && "link action invalid here.");
case phases::Preprocess: {
types::ID OutputTy = types::getPreprocessedType(Input->getType());
assert(OutputTy != types::TY_INVALID &&
"Cannot preprocess this input type!");
return new PreprocessJobAction(Input, OutputTy);
}
case phases::Precompile:
return new PrecompileJobAction(Input, types::TY_PCH);
case phases::Compile: {
if (Args.hasArg(options::OPT_fsyntax_only)) {
return new CompileJobAction(Input, types::TY_Nothing);
} else if (Args.hasArg(options::OPT__analyze)) {
return new AnalyzeJobAction(Input, types::TY_Plist);
} else if (Args.hasArg(options::OPT_emit_llvm)) {
types::ID Output =
Args.hasArg(options::OPT_S) ? types::TY_LLVMAsm : types::TY_LLVMBC;
return new CompileJobAction(Input, Output);
} else {
return new CompileJobAction(Input, types::TY_PP_Asm);
}
}
case phases::Assemble:
return new AssembleJobAction(Input, types::TY_Object);
}
assert(0 && "invalid phase in ConstructPhaseAction");
return 0;
}
void Driver::BuildJobs(Compilation &C) const {
llvm::PrettyStackTraceString CrashInfo("Building compilation jobs");
bool SaveTemps = C.getArgs().hasArg(options::OPT_save_temps);
bool UsePipes = C.getArgs().hasArg(options::OPT_pipe);
// FIXME: Pipes are forcibly disabled until we support executing
// them.
if (!CCCPrintBindings)
UsePipes = false;
// -save-temps inhibits pipes.
if (SaveTemps && UsePipes) {
Diag(clang::diag::warn_drv_pipe_ignored_with_save_temps);
UsePipes = true;
}
Arg *FinalOutput = C.getArgs().getLastArg(options::OPT_o);
// It is an error to provide a -o option if we are making multiple
// output files.
if (FinalOutput) {
unsigned NumOutputs = 0;
for (ActionList::const_iterator it = C.getActions().begin(),
ie = C.getActions().end(); it != ie; ++it)
if ((*it)->getType() != types::TY_Nothing)
++NumOutputs;
if (NumOutputs > 1) {
Diag(clang::diag::err_drv_output_argument_with_multiple_files);
FinalOutput = 0;
}
}
for (ActionList::const_iterator it = C.getActions().begin(),
ie = C.getActions().end(); it != ie; ++it) {
Action *A = *it;
// If we are linking an image for multiple archs then the linker
// wants -arch_multiple and -final_output <final image
// name>. Unfortunately, this doesn't fit in cleanly because we
// have to pass this information down.
//
// FIXME: This is a hack; find a cleaner way to integrate this
// into the process.
const char *LinkingOutput = 0;
if (isa<LinkJobAction>(A)) {
if (FinalOutput)
LinkingOutput = FinalOutput->getValue(C.getArgs());
else
LinkingOutput = DefaultImageName.c_str();
}
InputInfo II;
BuildJobsForAction(C, A, &C.getDefaultToolChain(),
/*CanAcceptPipe*/ true,
/*AtTopLevel*/ true,
/*LinkingOutput*/ LinkingOutput,
II);
}
// If there were errors, don't warn about any unused arguments.
if (Diags.getNumErrors())
return;
for (ArgList::const_iterator it = C.getArgs().begin(), ie = C.getArgs().end();
it != ie; ++it) {
Arg *A = *it;
// FIXME: It would be nice to be able to send the argument to the
// Diagnostic, so that extra values, position, and so on could be
// printed.
if (!A->isClaimed())
Diag(clang::diag::warn_drv_unused_argument)
<< A->getAsString(C.getArgs());
}
}
void Driver::BuildJobsForAction(Compilation &C,
const Action *A,
const ToolChain *TC,
bool CanAcceptPipe,
bool AtTopLevel,
const char *LinkingOutput,
InputInfo &Result) const {
llvm::PrettyStackTraceString CrashInfo("Building compilation jobs for action");
bool UsePipes = C.getArgs().hasArg(options::OPT_pipe);
// FIXME: Pipes are forcibly disabled until we support executing
// them.
if (!CCCPrintBindings)
UsePipes = false;
if (const InputAction *IA = dyn_cast<InputAction>(A)) {
// FIXME: It would be nice to not claim this here; maybe the old
// scheme of just using Args was better?
const Arg &Input = IA->getInputArg();
Input.claim();
if (isa<PositionalArg>(Input)) {
const char *Name = Input.getValue(C.getArgs());
Result = InputInfo(Name, A->getType(), Name);
} else
Result = InputInfo(&Input, A->getType(), "");
return;
}
if (const BindArchAction *BAA = dyn_cast<BindArchAction>(A)) {
const char *ArchName = BAA->getArchName();
if (!ArchName)
ArchName = C.getDefaultToolChain().getArchName().c_str();
BuildJobsForAction(C,
*BAA->begin(),
Host->getToolChain(C.getArgs(), ArchName),
CanAcceptPipe,
AtTopLevel,
LinkingOutput,
Result);
return;
}
const JobAction *JA = cast<JobAction>(A);
const Tool &T = TC->SelectTool(C, *JA);
// See if we should use an integrated preprocessor. We do so when we
// have exactly one input, since this is the only use case we care
// about (irrelevant since we don't support combine yet).
bool UseIntegratedCPP = false;
const ActionList *Inputs = &A->getInputs();
if (Inputs->size() == 1 && isa<PreprocessJobAction>(*Inputs->begin())) {
if (!C.getArgs().hasArg(options::OPT_no_integrated_cpp) &&
!C.getArgs().hasArg(options::OPT_traditional_cpp) &&
!C.getArgs().hasArg(options::OPT_save_temps) &&
T.hasIntegratedCPP()) {
UseIntegratedCPP = true;
Inputs = &(*Inputs)[0]->getInputs();
}
}
// Only use pipes when there is exactly one input.
bool TryToUsePipeInput = Inputs->size() == 1 && T.acceptsPipedInput();
InputInfoList InputInfos;
for (ActionList::const_iterator it = Inputs->begin(), ie = Inputs->end();
it != ie; ++it) {
InputInfo II;
BuildJobsForAction(C, *it, TC, TryToUsePipeInput,
/*AtTopLevel*/false,
LinkingOutput,
II);
InputInfos.push_back(II);
}
// Determine if we should output to a pipe.
bool OutputToPipe = false;
if (CanAcceptPipe && T.canPipeOutput()) {
// Some actions default to writing to a pipe if they are the top
// level phase and there was no user override.
//
// FIXME: Is there a better way to handle this?
if (AtTopLevel) {
if (isa<PreprocessJobAction>(A) && !C.getArgs().hasArg(options::OPT_o))
OutputToPipe = true;
} else if (UsePipes)
OutputToPipe = true;
}
// Figure out where to put the job (pipes).
Job *Dest = &C.getJobs();
if (InputInfos[0].isPipe()) {
assert(TryToUsePipeInput && "Unrequested pipe!");
assert(InputInfos.size() == 1 && "Unexpected pipe with multiple inputs.");
Dest = &InputInfos[0].getPipe();
}
// Always use the first input as the base input.
const char *BaseInput = InputInfos[0].getBaseInput();
// Determine the place to write output to (nothing, pipe, or
// filename) and where to put the new job.
if (JA->getType() == types::TY_Nothing) {
Result = InputInfo(A->getType(), BaseInput);
} else if (OutputToPipe) {
// Append to current piped job or create a new one as appropriate.
PipedJob *PJ = dyn_cast<PipedJob>(Dest);
if (!PJ) {
PJ = new PipedJob();
// FIXME: Temporary hack so that -ccc-print-bindings work until
// we have pipe support. Please remove later.
if (!CCCPrintBindings)
cast<JobList>(Dest)->addJob(PJ);
Dest = PJ;
}
Result = InputInfo(PJ, A->getType(), BaseInput);
} else {
Result = InputInfo(GetNamedOutputPath(C, *JA, BaseInput, AtTopLevel),
A->getType(), BaseInput);
}
if (CCCPrintBindings) {
llvm::errs() << "bind - \"" << T.getName() << "\", inputs: [";
for (unsigned i = 0, e = InputInfos.size(); i != e; ++i) {
llvm::errs() << InputInfos[i].getAsString();
if (i + 1 != e)
llvm::errs() << ", ";
}
llvm::errs() << "], output: " << Result.getAsString() << "\n";
} else {
const ArgList &TCArgs = C.getArgsForToolChain(TC);
T.ConstructJob(C, *JA, *Dest, Result, InputInfos, TCArgs, LinkingOutput);
}
}
const char *Driver::GetNamedOutputPath(Compilation &C,
const JobAction &JA,
const char *BaseInput,
bool AtTopLevel) const {
llvm::PrettyStackTraceString CrashInfo("Computing output path");
// Output to a user requested destination?
if (AtTopLevel) {
if (Arg *FinalOutput = C.getArgs().getLastArg(options::OPT_o))
return C.addResultFile(FinalOutput->getValue(C.getArgs()));
}
// Output to a temporary file?
if (!AtTopLevel && !C.getArgs().hasArg(options::OPT_save_temps)) {
std::string TmpName =
GetTemporaryPath(types::getTypeTempSuffix(JA.getType()));
return C.addTempFile(C.getArgs().MakeArgString(TmpName.c_str()));
}
llvm::sys::Path BasePath(BaseInput);
std::string BaseName(BasePath.getLast());
// Determine what the derived output name should be.
const char *NamedOutput;
if (JA.getType() == types::TY_Image) {
NamedOutput = DefaultImageName.c_str();
} else {
const char *Suffix = types::getTypeTempSuffix(JA.getType());
assert(Suffix && "All types used for output should have a suffix.");
std::string::size_type End = std::string::npos;
if (!types::appendSuffixForType(JA.getType()))
End = BaseName.rfind('.');
std::string Suffixed(BaseName.substr(0, End));
Suffixed += '.';
Suffixed += Suffix;
NamedOutput = C.getArgs().MakeArgString(Suffixed.c_str());
}
// As an annoying special case, PCH generation doesn't strip the
// pathname.
if (JA.getType() == types::TY_PCH) {
BasePath.eraseComponent();
if (BasePath.isEmpty())
BasePath = NamedOutput;
else
BasePath.appendComponent(NamedOutput);
return C.addResultFile(C.getArgs().MakeArgString(BasePath.c_str()));
} else {
return C.addResultFile(NamedOutput);
}
}
llvm::sys::Path Driver::GetFilePath(const char *Name,
const ToolChain &TC) const {
const ToolChain::path_list &List = TC.getFilePaths();
for (ToolChain::path_list::const_iterator
it = List.begin(), ie = List.end(); it != ie; ++it) {
llvm::sys::Path P(*it);
P.appendComponent(Name);
if (P.exists())
return P;
}
return llvm::sys::Path(Name);
}
llvm::sys::Path Driver::GetProgramPath(const char *Name,
const ToolChain &TC) const {
const ToolChain::path_list &List = TC.getProgramPaths();
for (ToolChain::path_list::const_iterator
it = List.begin(), ie = List.end(); it != ie; ++it) {
llvm::sys::Path P(*it);
P.appendComponent(Name);
if (P.exists())
return P;
}
// If all else failed, search the path.
llvm::sys::Path P(llvm::sys::Program::FindProgramByName(Name));
if (!P.empty())
return P;
return llvm::sys::Path(Name);
}
std::string Driver::GetTemporaryPath(const char *Suffix) const {
// FIXME: This is lame; sys::Path should provide this function (in
// particular, it should know how to find the temporary files dir).
std::string Error;
llvm::sys::Path P("/tmp/cc");
if (P.makeUnique(false, &Error)) {
Diag(clang::diag::err_drv_unable_to_make_temp) << Error;
return "";
}
// FIXME: Grumble, makeUnique sometimes leaves the file around!?
// PR3837.
P.eraseFromDisk(false, 0);
P.appendSuffix(Suffix);
return P.toString();
}
const HostInfo *Driver::GetHostInfo(const char *Triple) const {
llvm::PrettyStackTraceString CrashInfo("Constructing host");
// Dice into arch, platform, and OS. This matches
// arch,platform,os = '(.*?)-(.*?)-(.*?)'
// and missing fields are left empty.
std::string Arch, Platform, OS;
if (const char *ArchEnd = strchr(Triple, '-')) {
Arch = std::string(Triple, ArchEnd);
if (const char *PlatformEnd = strchr(ArchEnd+1, '-')) {
Platform = std::string(ArchEnd+1, PlatformEnd);
OS = PlatformEnd+1;
} else
Platform = ArchEnd+1;
} else
Arch = Triple;
// Normalize Arch a bit.
//
// FIXME: This is very incomplete.
if (Arch == "i686")
Arch = "i386";
else if (Arch == "amd64")
Arch = "x86_64";
else if (Arch == "powerpc" || Arch == "Power Macintosh")
Arch = "ppc";
if (memcmp(&OS[0], "darwin", 6) == 0)
return createDarwinHostInfo(*this, Arch.c_str(), Platform.c_str(),
OS.c_str());
return createUnknownHostInfo(*this, Arch.c_str(), Platform.c_str(),
OS.c_str());
}
bool Driver::ShouldUseClangCompiler(const Compilation &C, const JobAction &JA,
const std::string &ArchName) const {
// Check if user requested no clang, or clang doesn't understand
// this type (we only handle single inputs for now).
if (!CCCUseClang || JA.size() != 1 ||
!types::isAcceptedByClang((*JA.begin())->getType()))
return false;
// Otherwise make sure this is an action clang understands.
if (isa<PreprocessJobAction>(JA)) {
if (!CCCUseClangCPP)
return false;
} else if (!isa<PrecompileJobAction>(JA) && !isa<CompileJobAction>(JA))
return false;
// Use clang for C++?
if (!CCCUseClangCXX && types::isCXX((*JA.begin())->getType()))
return false;
// Finally, don't use clang if this isn't one of the user specified
// archs to build.
if (!CCCClangArchs.empty() && !CCCClangArchs.count(ArchName))
return false;
return true;
}
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