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source: src/main.cpp @ 4558df2

Last change on this file since 4558df2 was b6923b17, checked in by Andrew Beach <ajbeach@…>, 3 months ago
Fixed goto labelled loop. I had to reorder some passes. Updated control declaration hoisting (including comments and correcting update count). Added test, moved more tests into ctrl-flow.
Property mode set to `100644`
File size: 28.1 KB

Line
1	//
2	// Cforall Version 1.0.0 Copyright (C) 2015 University of Waterloo
3	//
4	// The contents of this file are covered under the licence agreement in the
5	// file "LICENCE" distributed with Cforall.
6	//
7	// main.cpp --
8	//
9	// Author : Peter Buhr and Rob Schluntz
10	// Created On : Fri May 15 23:12:02 2015
11	// Last Modified By : Peter A. Buhr
12	// Last Modified On : Sun Jun 23 16:38:09 2024
13	// Update Count : 691
14	//
15
16	#include <cxxabi.h> // for __cxa_demangle
17	#include <execinfo.h> // for backtrace, backtrace_symbols
18	#include <getopt.h> // for no_argument, optind, geto...
19	#include <cassert> // for assertf
20	#include <cstdio> // for fopen, FILE, fclose, stdin
21	#include <cstdlib> // for exit, free, abort, EXIT_F...
22	#include <csignal> // for signal, SIGABRT, SIGSEGV
23	#include <cstring> // for index
24	#include <fstream> // for ofstream
25	#include <iostream> // for operator<<, basic_ostream
26	#include <iomanip>
27	#include <iterator> // for back_inserter
28	#include <list> // for list
29	#include <string> // for char_traits, operator<<
30
31	#include "AST/Pass.hpp" // for pass_visitor_stats
32	#include "AST/Print.hpp" // for printAll
33	#include "AST/TranslationUnit.hpp" // for TranslationUnit
34	#include "AST/Util.hpp" // for checkInvariants
35	#include "CompilationState.hpp"
36	#include "../config.h" // for CFA_LIBDIR
37	#include "CodeGen/FixMain.hpp" // for FixMain
38	#include "CodeGen/FixNames.hpp" // for fixNames
39	#include "CodeGen/Generate.hpp" // for generate
40	#include "CodeGen/LinkOnce.hpp" // for translateLinkOnce
41	#include "Common/CodeLocationTools.hpp" // for forceFillCodeLocations
42	#include "Common/DeclStats.hpp" // for printDeclStats
43	#include "Common/ResolvProtoDump.hpp" // for dumpAsResolverProto
44	#include "Common/Stats.hpp" // for Stats
45	#include "Common/Utility.hpp" // for deleteAll, filter, printAll
46	#include "Concurrency/Actors.hpp" // for implementActors
47	#include "Concurrency/Corun.hpp" // for implementCorun
48	#include "Concurrency/Keywords.hpp" // for implementMutex, implement...
49	#include "Concurrency/Waitfor.hpp" // for generateWaitfor
50	#include "Concurrency/Waituntil.hpp" // for generateWaitUntil
51	#include "ControlStruct/ExceptDecl.hpp" // for translateExcept
52	#include "ControlStruct/ExceptTranslate.hpp"// for translateThrows, translat...
53	#include "ControlStruct/FixLabels.hpp" // for fixLabels
54	#include "ControlStruct/HoistControlDecls.hpp" // hoistControlDecls
55	#include "ControlStruct/TranslateEnumRange.hpp" // translateEnumRange
56	#include "GenPoly/Box.hpp" // for box
57	#include "GenPoly/InstantiateGeneric.hpp" // for instantiateGeneric
58	#include "GenPoly/Lvalue.hpp" // for convertLvalue
59	#include "GenPoly/Specialize.hpp" // for convertSpecializations
60	#include "InitTweak/FixInit.hpp" // for fix
61	#include "InitTweak/GenInit.hpp" // for genInit
62	#include "MakeLibCfa.hpp" // for makeLibCfa
63	#include "Parser/RunParser.hpp" // for buildList, dumpParseTree,...
64	#include "ResolvExpr/CandidatePrinter.hpp" // for printCandidates
65	#include "ResolvExpr/EraseWith.hpp" // for eraseWith
66	#include "ResolvExpr/Resolver.hpp" // for resolve
67	#include "Tuples/Tuples.hpp" // for expandMemberTuples, expan...
68	#include "Validate/Autogen.hpp" // for autogenerateRoutines
69	#include "Validate/CompoundLiteral.hpp" // for handleCompoundLiterals
70	#include "Validate/EliminateTypedef.hpp" // for eliminateTypedef
71	#include "Validate/EnumAndPointerDecay.hpp" // for decayEnumsAndPointers
72	#include "Validate/FindSpecialDecls.hpp" // for findGlobalDecls
73	#include "Validate/FixQualifiedTypes.hpp" // for fixQualifiedTypes
74	#include "Validate/FixReturnTypes.hpp" // for fixReturnTypes
75	#include "Validate/ForallPointerDecay.hpp" // for decayForallPointers
76	#include "Validate/GenericParameter.hpp" // for fillGenericParameters, tr...
77	#include "Validate/HoistStruct.hpp" // for hoistStruct
78	#include "Validate/HoistTypeDecls.hpp" // for hoistTypeDecls
79	#include "Validate/ImplementEnumFunc.hpp" // for implementEnumFunc
80	#include "Validate/InitializerLength.hpp" // for setLengthFromInitializer
81	#include "Validate/LabelAddressFixer.hpp" // for fixLabelAddresses
82	#include "Validate/LinkInstanceTypes.hpp" // for linkInstanceTypes
83	#include "Validate/ReplaceTypedef.hpp" // for replaceTypedef
84	#include "Validate/ReturnCheck.hpp" // for checkReturnStatements
85	#include "Validate/VerifyCtorDtorAssign.hpp" // for verifyCtorDtorAssign
86	#include "Virtual/ExpandCasts.hpp" // for expandCasts
87	#include "Virtual/VirtualDtor.hpp" // for implementVirtDtors
88
89	using namespace std;
90
91	static void NewPass( const char * const name ) {
92	Stats::Heap::newPass( name );
93	using namespace Stats::Counters;
94	{
95	static auto group = build<CounterGroup>( "Pass Visitor Template" );
96	auto pass = build<CounterGroup>( name, group );
97	ast::pass_visitor_stats.depth = 0;
98	ast::pass_visitor_stats.avg = build<AverageCounter<double>>( "Average Depth", pass );
99	ast::pass_visitor_stats.max = build<MaxCounter<double>>( "Max Depth", pass );
100	}
101	}
102
103	#define PASS( name, pass, unit, ... ) \
104	if ( errorp ) { cerr << name << endl; } \
105	NewPass(name); \
106	Stats::Time::StartBlock(name); \
107	pass(unit,##__VA_ARGS__); \
108	Stats::Time::StopBlock(); \
109	if ( invariant ) { \
110	ast::checkInvariants(unit); \
111	}
112
113	#define DUMP( cond, unit ) \
114	if ( cond ) { \
115	dump( std::move( unit ) ); \
116	return EXIT_SUCCESS; \
117	}
118
119	static bool waiting_for_gdb = false; // flag to set cfa-cpp to wait for gdb on start
120
121	static string PreludeDirector = "";
122
123	static void parse_cmdline( int argc, char * argv[] );
124	static void dump( ast::TranslationUnit && transUnit, ostream & out = cout );
125
126	static void backtrace( int start ) { // skip first N stack frames
127	enum { Frames = 50, }; // maximum number of stack frames
128	void * array[Frames];
129	size_t size = ::backtrace( array, Frames );
130	char ** messages = ::backtrace_symbols( array, size ); // does not demangle names
131
132	*index( messages[0], '(' ) = '\0'; // find executable name
133	cerr << "Stack back trace for: " << messages[0] << endl;
134
135	// skip last 2 stack frames after main
136	for ( unsigned int i = start; i < size - 2 && messages != nullptr; i += 1 ) {
137	char * mangled_name = nullptr, * offset_begin = nullptr, * offset_end = nullptr;
138
139	for ( char * p = messages[i]; *p; p += 1 ) { // find parantheses and +offset
140	if ( *p == '(' ) {
141	mangled_name = p;
142	} else if ( *p == '+' ) {
143	offset_begin = p;
144	} else if ( *p == ')' ) {
145	offset_end = p;
146	break;
147	} // if
148	} // for
149
150	// if line contains symbol, attempt to demangle
151	int frameNo = i - start;
152	if ( mangled_name && offset_begin && offset_end && mangled_name < offset_begin ) {
153	*mangled_name++ = '\0'; // delimit strings
154	*offset_begin++ = '\0';
155	*offset_end++ = '\0';
156
157	int status;
158	char * real_name = __cxxabiv1::__cxa_demangle( mangled_name, 0, 0, &status );
159	// bug in __cxa_demangle for single-character lower-case non-mangled names
160	if ( status == 0 ) { // demangling successful ?
161	cerr << "(" << frameNo << ") " << messages[i] << " : "
162	<< real_name << "+" << offset_begin << offset_end << endl;
163	} else { // otherwise, output mangled name
164	cerr << "(" << frameNo << ") " << messages[i] << " : "
165	<< mangled_name << "(/unknown/)+" << offset_begin << offset_end << endl;
166	} // if
167
168	free( real_name );
169	} else { // otherwise, print the whole line
170	cerr << "(" << frameNo << ") " << messages[i] << endl;
171	} // if
172	} // for
173
174	free( messages );
175	} // backtrace
176
177	#define SIGPARMS int sig __attribute__(( unused )), siginfo_t * sfp __attribute__(( unused )), ucontext_t * cxt __attribute__(( unused ))
178
179	static void _Signal(struct sigaction & act, int sig, int flags ) {
180	sigemptyset( &act.sa_mask );
181	act.sa_flags = flags;
182
183	if ( sigaction( sig, &act, nullptr ) == -1 ) {
184	cerr << "cfa-cpp compilation error problem installing signal handler, error(" << errno << ") " << strerror( errno ) << endl;
185	_exit( EXIT_FAILURE );
186	} // if
187	}
188
189	static void Signal( int sig, void (* handler)(SIGPARMS), int flags ) {
190	struct sigaction act;
191	act.sa_sigaction = (void ()(int, siginfo_t , void *))handler;
192	_Signal(act, sig, flags);
193	} // Signal
194
195	static void Signal( int sig, void (* handler)(int), int flags ) {
196	struct sigaction act;
197	act.sa_handler = handler;
198	_Signal(act, sig, flags);
199	} // Signal
200
201	static void sigSegvBusHandler( SIGPARMS ) {
202	if ( sfp->si_addr == nullptr ) {
203	cerr << "Null pointer (nullptr) dereference." << endl;
204	} else {
205	cerr << (sig == SIGSEGV ? "Segment fault" : "Bus error") << " at memory location " << sfp->si_addr << "." << endl
206	<< "Possible cause is reading outside the address space or writing to a protected area within the address space with an invalid pointer or subscript." << endl;
207	} // if
208	backtrace( 2 ); // skip first 2 stack frames
209	abort(); // cause core dump for debugging
210	} // sigSegvBusHandler
211
212	static void sigFpeHandler( SIGPARMS ) {
213	const char * msg;
214
215	switch ( sfp->si_code ) {
216	case FPE_INTDIV: case FPE_FLTDIV: msg = "divide by zero"; break;
217	case FPE_FLTOVF: msg = "overflow"; break;
218	case FPE_FLTUND: msg = "underflow"; break;
219	case FPE_FLTRES: msg = "inexact result"; break;
220	case FPE_FLTINV: msg = "invalid operation"; break;
221	default: msg = "unknown";
222	} // choose
223	cerr << "Computation error " << msg << " at location " << sfp->si_addr << endl
224	<< "Possible cause is constant-expression evaluation invalid." << endl;
225	backtrace( 2 ); // skip first 2 stack frames
226	abort(); // cause core dump for debugging
227	} // sigFpeHandler
228
229	static void sigAbortHandler( SIGPARMS ) {
230	backtrace( 6 ); // skip first 6 stack frames
231	Signal( SIGABRT, SIG_DFL, SA_SIGINFO ); // reset default signal handler
232	raise( SIGABRT ); // reraise SIGABRT
233	} // sigAbortHandler
234
235	int main( int argc, char * argv[] ) {
236	FILE * input; // use FILE rather than istream because yyin is FILE
237	ostream * output = & cout;
238	ast::TranslationUnit transUnit;
239
240	Signal( SIGSEGV, sigSegvBusHandler, SA_SIGINFO );
241	Signal( SIGBUS, sigSegvBusHandler, SA_SIGINFO );
242	Signal( SIGFPE, sigFpeHandler, SA_SIGINFO );
243	Signal( SIGABRT, sigAbortHandler, SA_SIGINFO );
244
245	// cout << "main" << endl;
246	// for ( int i = 0; i < argc; i += 1 ) {
247	// cout << '\t' << argv[i] << endl;
248	// } // for
249
250	parse_cmdline( argc, argv ); // process command-line arguments
251
252	if ( waiting_for_gdb ) {
253	cerr << "Waiting for gdb" << endl;
254	cerr << "run :" << endl;
255	cerr << " gdb attach " << getpid() << endl;
256	raise(SIGSTOP);
257	} // if
258
259	try {
260	// choose to read the program from a file or stdin
261	if ( optind < argc ) { // any commands after the flags ? => input file name
262	input = fopen( argv[ optind ], "r" );
263	assertf( input, "cannot open %s because %s\n", argv[ optind ], strerror( errno ) );
264	optind += 1;
265	} else { // no input file name
266	input = stdin;
267	} // if
268
269	Stats::Time::StartGlobal();
270	NewPass("Parse");
271	Stats::Time::StartBlock("Parse");
272
273	// read in the builtins, extras, and the prelude
274	if ( ! nopreludep ) { // include gcc builtins
275	// -l is for initial build ONLY and builtins.cf is not in the lib directory so access it here.
276
277	assertf( !PreludeDirector.empty(), "Can't find prelude without option --prelude-dir must be used." );
278
279	// Read to gcc builtins, if not generating the cfa library
280	FILE * gcc_builtins = fopen( (PreludeDirector + "/gcc-builtins.cfa").c_str(), "r" );
281	assertf( gcc_builtins, "cannot open gcc-builtins.cfa\n" );
282	parse( gcc_builtins, ast::Linkage::Compiler );
283
284	// read the extra prelude in, if not generating the cfa library
285	FILE * extras = fopen( (PreludeDirector + "/extras.cfa").c_str(), "r" );
286	assertf( extras, "cannot open extras.cfa\n" );
287	parse( extras, ast::Linkage::BuiltinC );
288	if ( ! libcfap ) {
289	// read the prelude in, if not generating the cfa library
290	FILE * prelude = fopen( (PreludeDirector + "/prelude.cfa").c_str(), "r" );
291	assertf( prelude, "cannot open prelude.cfa\n" );
292	parse( prelude, ast::Linkage::Intrinsic );
293
294	// Read to cfa builtins, if not generating the cfa library
295	FILE * builtins = fopen( (PreludeDirector + "/builtins.cfa").c_str(), "r" );
296	assertf( builtins, "cannot open builtins.cfa\n" );
297	parse( builtins, ast::Linkage::BuiltinCFA );
298	} // if
299	} // if
300
301	parse( input, libcfap ? ast::Linkage::Intrinsic : ast::Linkage::Cforall, yydebug );
302
303	transUnit = buildUnit();
304
305	DUMP( astp, transUnit );
306
307	Stats::Time::StopBlock();
308
309	PASS( "Hoist Type Decls", Validate::hoistTypeDecls, transUnit );
310
311	PASS( "Translate Exception Declarations", ControlStruct::translateExcept, transUnit );
312	DUMP( exdeclp, transUnit );
313	PASS( "Verify Ctor, Dtor & Assign", Validate::verifyCtorDtorAssign, transUnit );
314	PASS( "Replace Typedefs", Validate::replaceTypedef, transUnit );
315	PASS( "Fix Return Types", Validate::fixReturnTypes, transUnit );
316	PASS( "Enum and Pointer Decay", Validate::decayEnumsAndPointers, transUnit );
317
318	PASS( "Link Instance Types", Validate::linkInstanceTypes, transUnit );
319
320	PASS( "Forall Pointer Decay", Validate::decayForallPointers, transUnit );
321	PASS( "Fix Qualified Types", Validate::fixQualifiedTypes, transUnit );
322	PASS( "Eliminate Typedef", Validate::eliminateTypedef, transUnit );
323	PASS( "Hoist Struct", Validate::hoistStruct, transUnit );
324	PASS( "Validate Generic Parameters", Validate::fillGenericParameters, transUnit );
325	PASS( "Translate Enum Range Expression", ControlStruct::translateEnumRange, transUnit );
326	PASS( "Translate Dimensions", Validate::translateDimensionParameters, transUnit );
327	PASS( "Generate Enum Attributes Functions", Validate::implementEnumFunc, transUnit );
328	PASS( "Check Function Returns", Validate::checkReturnStatements, transUnit );
329	PASS( "Fix Return Statements", InitTweak::fixReturnStatements, transUnit );
330	PASS( "Implement Concurrent Keywords", Concurrency::implementKeywords, transUnit );
331	PASS( "Fix Unique Ids", Validate::fixUniqueIds, transUnit );
332	PASS( "Implement Corun", Concurrency::implementCorun, transUnit );
333	PASS( "Fix Label Address", Validate::fixLabelAddresses, transUnit );
334	PASS( "Fix Labels", ControlStruct::fixLabels, transUnit );
335	PASS( "Hoist Control Declarations", ControlStruct::hoistControlDecls, transUnit );
336
337	PASS( "Generate Autogen Routines", Validate::autogenerateRoutines, transUnit );
338
339	PASS( "Implement Actors", Concurrency::implementActors, transUnit );
340	PASS( "Implement Virtual Destructors", Virtual::implementVirtDtors, transUnit );
341	PASS( "Implement Mutex", Concurrency::implementMutex, transUnit );
342	PASS( "Implement Thread Start", Concurrency::implementThreadStarter, transUnit );
343	PASS( "Compound Literal", Validate::handleCompoundLiterals, transUnit );
344	PASS( "Set Length From Initializer", Validate::setLengthFromInitializer, transUnit );
345	PASS( "Find Global Decls", Validate::findGlobalDecls, transUnit );
346
347	if ( symtabp ) {
348	return EXIT_SUCCESS;
349	} // if
350
351	if ( expraltp ) {
352	ResolvExpr::printCandidates( transUnit );
353	return EXIT_SUCCESS;
354	} // if
355
356	DUMP( validp, transUnit );
357
358	PASS( "Translate Throws", ControlStruct::translateThrows, transUnit );
359	PASS( "Implement Waituntil", Concurrency::generateWaitUntil, transUnit );
360	PASS( "Fix Names", CodeGen::fixNames, transUnit );
361	PASS( "Gen Init", InitTweak::genInit, transUnit );
362	PASS( "Expand Member Tuples" , Tuples::expandMemberTuples, transUnit );
363
364	if ( libcfap ) {
365	// Generate the bodies of cfa library functions.
366	LibCfa::makeLibCfa( transUnit );
367	} // if
368
369	if ( declstatsp ) {
370	printDeclStats( transUnit );
371	return EXIT_SUCCESS;
372	} // if
373
374	DUMP( bresolvep, transUnit );
375
376	if ( resolvprotop ) {
377	dumpAsResolverProto( transUnit );
378	return EXIT_SUCCESS;
379	} // if
380
381	PASS( "Resolve", ResolvExpr::resolve, transUnit );
382	DUMP( exprp, transUnit );
383	PASS( "Fix Init", InitTweak::fix, transUnit, buildingLibrary() ); // Here
384	PASS( "Erase With", ResolvExpr::eraseWith, transUnit );
385
386	// fix ObjectDecl - replaces ConstructorInit nodes
387	DUMP( ctorinitp, transUnit );
388
389	// Currently not working due to unresolved issues with UniqueExpr
390	PASS( "Expand Unique Expr", Tuples::expandUniqueExpr, transUnit ); // xxx - is this the right place for this? want to expand ASAP so tha, sequent passes don't need to worry about double-visiting a unique expr - needs to go after InitTweak::fix so that copy constructed return declarations are reused
391
392	PASS( "Translate Tries", ControlStruct::translateTries, transUnit );
393	PASS( "Gen Waitfor", Concurrency::generateWaitFor, transUnit );
394	PASS( "Fix Main Linkage", CodeGen::fixMainLinkage, transUnit, !nomainp );
395
396	// Needs to happen before tuple types are expanded.
397	PASS( "Convert Specializations", GenPoly::convertSpecializations, transUnit );
398
399	PASS( "Expand Tuples", Tuples::expandTuples, transUnit );
400	DUMP( tuplep, transUnit );
401
402	// Must come after Translate Tries.
403	PASS( "Virtual Expand Casts", Virtual::expandCasts, transUnit );
404
405	PASS( "Instantiate Generics", GenPoly::instantiateGeneric, transUnit );
406	DUMP( genericsp, transUnit );
407
408	PASS( "Convert L-Value", GenPoly::convertLvalue, transUnit );
409	DUMP( bboxp, transUnit );
410	PASS( "Box", GenPoly::box, transUnit );
411	PASS( "Link-Once", CodeGen::translateLinkOnce, transUnit );
412
413	// Code has been lowered to C, now we can start generation.
414
415	DUMP( bcodegenp, transUnit );
416
417	if ( optind < argc ) { // any commands after the flags and input file ? => output file name
418	output = new ofstream( argv[ optind ] );
419	} // if
420
421	PASS( "Code Gen", CodeGen::generate, transUnit, *output, !genproto, prettycodegenp, true, linemarks, false );
422	CodeGen::fixMainInvoke( transUnit, *output, (PreludeDirector + "/bootloader.c").c_str() );
423
424	if ( output != &cout ) {
425	delete output;
426	} // if
427	} catch ( SemanticErrorException & e ) {
428	if ( errorp ) {
429	cerr << "---AST at error:---" << endl;
430	dump( std::move( transUnit ), cerr );
431	cerr << endl << "---End of AST, begin error message:---\n" << endl;
432	} // if
433	e.print();
434	if ( output != &cout ) {
435	delete output;
436	} // if
437	return EXIT_FAILURE;
438	} catch ( std::bad_alloc & ) {
439	cerr << "cfa-cpp compilation error std::bad_alloc" << endl;
440	backtrace( 1 );
441	abort();
442	} catch ( ... ) {
443	exception_ptr eptr = current_exception();
444	try {
445	if (eptr) {
446	rethrow_exception(eptr);
447	} else {
448	cerr << "cfa-cpp compilation error exception uncaught and unknown" << endl;
449	} // if
450	} catch( const exception & e ) {
451	cerr << "cfa-cpp compilation error uncaught exception \"" << e.what() << "\"\n";
452	} // try
453	return EXIT_FAILURE;
454	} // try
455
456	// This pseudo-pass is used to get more accurate heap statistics.
457	NewPass("Clean-up");
458	Stats::Time::StartBlock("Clean-Up");
459	transUnit.global = ast::TranslationGlobal();
460	transUnit.decls.clear();
461	Stats::Time::StopBlock();
462
463	Stats::print();
464	return EXIT_SUCCESS;
465	} // main
466
467
468	static const char optstring[] = ":c:ghilLmNnpdP:S:twW:D:";
469
470	enum { PreludeDir = 128 };
471	static struct option long_opts[] = {
472	{ "colors", required_argument, nullptr, 'c' },
473	{ "gdb", no_argument, nullptr, 'g' },
474	{ "help", no_argument, nullptr, 'h' },
475	{ "invariant", no_argument, nullptr, 'i' },
476	{ "libcfa", no_argument, nullptr, 'l' },
477	{ "linemarks", no_argument, nullptr, 'L' },
478	{ "no-main", no_argument, nullptr, 'm' },
479	{ "no-linemarks", no_argument, nullptr, 'N' },
480	{ "no-prelude", no_argument, nullptr, 'n' },
481	{ "prototypes", no_argument, nullptr, 'p' },
482	{ "deterministic-out", no_argument, nullptr, 'd' },
483	{ "print", required_argument, nullptr, 'P' },
484	{ "prelude-dir", required_argument, nullptr, PreludeDir },
485	{ "statistics", required_argument, nullptr, 'S' },
486	{ "tree", no_argument, nullptr, 't' },
487	{ "", no_argument, nullptr, 0 }, // -w
488	{ "", no_argument, nullptr, 0 }, // -W
489	{ "", no_argument, nullptr, 0 }, // -D
490	{ nullptr, 0, nullptr, 0 }
491	}; // long_opts
492
493	static const char * description[] = {
494	"diagnostic color: never, always, auto", // -c
495	"wait for gdb to attach", // -g
496	"print translator help message", // -h
497	"invariant checking during AST passes", // -i
498	"generate libcfa.c", // -l
499	"generate line marks", // -L
500	"do not replace main", // -m
501	"do not generate line marks", // -N
502	"do not read prelude", // -n
503	"do not generate prelude prototypes => prelude not printed", // -p
504	"only print deterministic output", // -d
505	"print", // -P
506	"<directory> prelude directory for debug/nodebug", // no flag
507	"<option-list> enable profiling information: counters, heap, time, all, none", // -S
508	"building cfa standard lib", // -t
509	"", // -w
510	"", // -W
511	"", // -D
512	}; // description
513
514	static_assert( sizeof( long_opts ) / sizeof( long_opts[0] ) - 1 == sizeof( description ) / sizeof( description[0] ), "Long opts and description must match" );
515
516	static struct Printopts {
517	const char * name;
518	int & flag;
519	int val;
520	const char * descript;
521	} printopts[] = {
522	{ "ascodegen", codegenp, true, "print AST as codegen rather than AST" },
523	{ "asterr", errorp, true, "print AST on error" },
524	{ "declstats", declstatsp, true, "print code property statistics" },
525	{ "parse", yydebug, true, "print yacc (parsing) debug information" },
526	{ "pretty", prettycodegenp, true, "prettyprint for ascodegen flag" },
527	{ "rproto", resolvprotop, true, "resolver-proto instance" },
528	{ "rsteps", resolvep, true, "print resolver steps" },
529	// AST dumps
530	{ "ast", astp, true, "print AST after parsing" },
531	{ "excpdecl", exdeclp, true, "print AST after translating exception decls" },
532	{ "symevt", symtabp, true, "print AST after symbol table events" },
533	{ "expralt", expraltp, true, "print AST after expressions alternatives" },
534	{ "valdecl", validp, true, "print AST after declaration validation pass" },
535	{ "bresolver", bresolvep, true, "print AST before resolver step" },
536	{ "expranly", exprp, true, "print AST after expression analysis" },
537	{ "ctordtor", ctorinitp, true, "print AST after ctor/dtor are replaced" },
538	{ "tuple", tuplep, true, "print AST after tuple expansion" },
539	{ "instgen", genericsp, true, "print AST after instantiate generics" },
540	{ "bbox", bboxp, true, "print AST before box pass" },
541	{ "bcodegen", bcodegenp, true, "print AST before code generation" }
542	};
543	enum { printoptsSize = sizeof( printopts ) / sizeof( printopts[0] ) };
544
545	static void usage( char * argv[] ) {
546	cout << "Usage: " << argv[0] << " [options] [input-file (default stdin)] [output-file (default stdout)], where options are:" << endl;
547	int i = 0, j = 1; // j skips starting colon
548	for ( ; long_opts[i].name != 0 && optstring[j] != '\0'; i += 1, j += 1 ) {
549	if ( long_opts[i].name[0] != '\0' ) { // hidden option, internal usage only
550	if ( strcmp( long_opts[i].name, "prelude-dir" ) != 0 ) { // flag
551	cout << " -" << optstring[j] << ",";
552	} else { // no flag
553	j -= 1; // compensate
554	cout << " ";
555	} // if
556	cout << " --" << left << setw(12) << long_opts[i].name << " ";
557	if ( strcmp( long_opts[i].name, "print" ) == 0 ) {
558	cout << "one of: " << endl;
559	for ( int i = 0; i < printoptsSize; i += 1 ) {
560	cout << setw(10) << " " << left << setw(10) << printopts[i].name << " " << printopts[i].descript << endl;
561	} // for
562	} else {
563	cout << description[i] << endl;
564	} // if
565	} // if
566	if ( optstring[j + 1] == ':' ) j += 1;
567	} // for
568	if ( long_opts[i].name != 0 \|\| optstring[j] != '\0' ) assertf( false, "internal error, mismatch of option flags and names\n" );
569	exit( EXIT_FAILURE );
570	} // usage
571
572	static void parse_cmdline( int argc, char * argv[] ) {
573	opterr = 0; // (global) prevent getopt from printing error messages
574
575	bool Wsuppress = false, Werror = false;
576	int c;
577	while ( (c = getopt_long( argc, argv, optstring, long_opts, nullptr )) != -1 ) {
578	switch ( c ) {
579	case 'c': // diagnostic colors
580	if ( strcmp( optarg, "always" ) == 0 ) {
581	ErrorHelpers::colors = ErrorHelpers::Colors::Always;
582	} else if ( strcmp( optarg, "never" ) == 0 ) {
583	ErrorHelpers::colors = ErrorHelpers::Colors::Never;
584	} else if ( strcmp( optarg, "auto" ) == 0 ) {
585	ErrorHelpers::colors = ErrorHelpers::Colors::Auto;
586	} // if
587	break;
588	case 'h': // help message
589	usage( argv ); // no return
590	break;
591	case 'i': // invariant checking
592	invariant = true;
593	break;
594	case 'l': // generate libcfa.c
595	libcfap = true;
596	break;
597	case 'L': // generate line marks
598	linemarks = true;
599	break;
600	case 'm': // do not replace main
601	nomainp = true;
602	break;
603	case 'N': // do not generate line marks
604	linemarks = false;
605	break;
606	case 'n': // do not read prelude
607	nopreludep = true;
608	break;
609	case 'p': // generate prototypes for prelude functions
610	genproto = true;
611	break;
612	case 'd': // don't print non-deterministic output
613	deterministic_output = true;
614	break;
615	case 'P': // print options
616	for ( int i = 0;; i += 1 ) {
617	if ( i == printoptsSize ) {
618	cout << "Unknown --print option " << optarg << endl;
619	goto Default;
620	} // if
621	if ( strcmp( optarg, printopts[i].name ) == 0 ) {
622	printopts[i].flag = printopts[i].val;
623	break;
624	} // if
625	} // for
626	break;
627	case PreludeDir: // prelude directory for debug/nodebug, hidden
628	PreludeDirector = optarg;
629	break;
630	case 'S': // enable profiling information, argument comma separated list of names
631	Stats::parse_params( optarg );
632	break;
633	case 't': // building cfa stdlib
634	treep = true;
635	break;
636	case 'g': // wait for gdb
637	waiting_for_gdb = true;
638	break;
639	case 'w': // suppress all warnings, hidden
640	Wsuppress = true;
641	break;
642	case 'W': // coordinate gcc -W with CFA, hidden
643	if ( strcmp( optarg, "all" ) == 0 ) {
644	SemanticWarning_EnableAll();
645	} else if ( strcmp( optarg, "error" ) == 0 ) {
646	Werror = true;
647	} else {
648	char * warning = optarg;
649	Severity s;
650	if ( strncmp( optarg, "no-", 3 ) == 0 ) {
651	warning += 3;
652	s = Severity::Suppress;
653	} else {
654	s = Severity::Warn;
655	} // if
656	SemanticWarning_Set( warning, s );
657	} // if
658	break;
659	case 'D': // ignore -Dxxx, forwarded by cpp, hidden
660	break;
661	case '?': // unknown option
662	if ( optopt ) { // short option ?
663	cout << "Unknown option -" << (char)optopt << endl;
664	} else {
665	cout << "Unknown option " << argv[optind - 1] << endl;
666	} // if
667	goto Default;
668	case ':': // missing option
669	if ( optopt ) { // short option ?
670	cout << "Missing option for -" << (char)optopt << endl;
671	} else {
672	cout << "Missing option for " << argv[optind - 1] << endl;
673	} // if
674	goto Default;
675	Default:
676	default:
677	usage( argv ); // no return
678	} // switch
679	} // while
680
681	if ( Werror ) {
682	SemanticWarning_WarningAsError();
683	} // if
684	if ( Wsuppress ) {
685	SemanticWarning_SuppressAll();
686	} // if
687	// for ( const auto w : WarningFormats ) {
688	// cout << w.name << ' ' << (int)w.severity << endl;
689	// } // for
690	} // parse_cmdline
691
692	static bool notPrelude( ast::ptr<ast::Decl> & decl ) {
693	return !decl->linkage.is_builtin;
694	}
695
696	static void dump( ast::TranslationUnit && unit, std::ostream & out ) {
697	// May filter out all prelude declarations.
698	if ( genproto ) {
699	std::list<ast::ptr<ast::Decl>> decls;
700	std::copy_if( unit.decls.begin(), unit.decls.end(),
701	std::back_inserter( decls ), notPrelude );
702	decls.swap( unit.decls );
703	}
704
705	// May print as full dump or as code generation.
706	if ( codegenp ) {
707	CodeGen::generate( unit, out, !genproto, prettycodegenp, false, false, false );
708	} else {
709	ast::printAll( out, unit.decls );
710	}
711	}
712
713	// Local Variables: //
714	// tab-width: 4 //
715	// mode: c++ //
716	// compile-command: "make install" //
717	// End: //

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