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source: src/main.cc @ 3e96559

ADTarm-ehast-experimentalcleanup-dtorsenumforall-pointer-decayjacob/cs343-translationjenkins-sandboxnew-astnew-ast-unique-exprpthread-emulationqualifiedEnum

Last change on this file since 3e96559 was 3e96559, checked in by Peter A. Buhr <pabuhr@…>, 5 years ago
add --help option for cfa-cpp to show options, and restructure the option handling code
Property mode set to `100644`
File size: 23.8 KB

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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.cc --
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 : Thu May 2 11:09:37 2019
13	// Update Count : 523
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 <signal.h> // for signal, SIGABRT, SIGSEGV
20	#include <cassert> // for assertf
21	#include <cstdio> // for fopen, FILE, fclose, stdin
22	#include <cstdlib> // for exit, free, abort, EXIT_F...
23	#include <cstring> // for index
24	#include <fstream> // for ofstream
25	#include <iostream> // for operator<<, basic_ostream
26	#include <iterator> // for back_inserter
27	#include <list> // for list
28	#include <string> // for char_traits, operator<<
29
30	#include "CompilationState.h"
31	#include "../config.h" // for CFA_LIBDIR
32	#include "CodeGen/FixMain.h" // for FixMain
33	#include "CodeGen/FixNames.h" // for fixNames
34	#include "CodeGen/Generate.h" // for generate
35	#include "CodeTools/DeclStats.h" // for printDeclStats
36	#include "CodeTools/ResolvProtoDump.h" // for dumpAsResolvProto
37	#include "CodeTools/TrackLoc.h" // for fillLocations
38	#include "Common/CompilerError.h" // for CompilerError
39	#include "Common/Stats.h"
40	#include "Common/PassVisitor.h"
41	#include "Common/SemanticError.h" // for SemanticError
42	#include "Common/UnimplementedError.h" // for UnimplementedError
43	#include "Common/utility.h" // for deleteAll, filter, printAll
44	#include "Concurrency/Waitfor.h" // for generateWaitfor
45	#include "ControlStruct/ExceptTranslate.h" // for translateEHM
46	#include "ControlStruct/Mutate.h" // for mutate
47	#include "GenPoly/Box.h" // for box
48	#include "GenPoly/InstantiateGeneric.h" // for instantiateGeneric
49	#include "GenPoly/Lvalue.h" // for convertLvalue
50	#include "GenPoly/Specialize.h" // for convertSpecializations
51	#include "InitTweak/FixInit.h" // for fix
52	#include "InitTweak/GenInit.h" // for genInit
53	#include "MakeLibCfa.h" // for makeLibCfa
54	#include "Parser/LinkageSpec.h" // for Spec, Cforall, Intrinsic
55	#include "Parser/ParseNode.h" // for DeclarationNode, buildList
56	#include "Parser/TypedefTable.h" // for TypedefTable
57	#include "ResolvExpr/AlternativePrinter.h" // for AlternativePrinter
58	#include "ResolvExpr/Resolver.h" // for resolve
59	#include "SymTab/Validate.h" // for validate
60	#include "SynTree/Declaration.h" // for Declaration
61	#include "SynTree/Visitor.h" // for acceptAll
62	#include "Tuples/Tuples.h" // for expandMemberTuples, expan...
63	#include "Virtual/ExpandCasts.h" // for expandCasts
64
65	using namespace std;
66
67	static void NewPass( const char * const name ) {
68	Stats::Heap::newPass( name );
69	using namespace Stats::Counters;
70	{
71	static auto group = build<CounterGroup>( "Pass Visitor" );
72	auto pass = build<CounterGroup>( name, group );
73	pass_visitor_stats.depth = 0;
74	pass_visitor_stats.avg = build<AverageCounter<double>>( "Average Depth", pass );
75	pass_visitor_stats.max = build<MaxCounter<double>>( "Max Depth", pass );
76	}
77	{
78	static auto group = build<CounterGroup>( "Syntax Node" );
79	auto pass = build<CounterGroup>( name, group );
80	BaseSyntaxNode::new_nodes = build<SimpleCounter>( "Allocs", pass );
81	}
82	}
83
84	#define PASS( name, pass ) \
85	if ( errorp ) { cerr << name << endl; } \
86	NewPass(name); \
87	Stats::Time::StartBlock(name); \
88	pass; \
89	Stats::Time::StopBlock();
90
91	LinkageSpec::Spec linkage = LinkageSpec::Cforall;
92	TypedefTable typedefTable;
93	DeclarationNode * parseTree = nullptr; // program parse tree
94
95	static std::string PreludeDirector = "";
96
97	static void parse_cmdline( int argc, char argv[], const char & filename );
98	static void parse( FILE * input, LinkageSpec::Spec linkage, bool shouldExit = false );
99	static void dump( list< Declaration * > & translationUnit, ostream & out = cout );
100
101	static void backtrace( int start ) { // skip first N stack frames
102	enum { Frames = 50 };
103	void * array[Frames];
104	int size = ::backtrace( array, Frames );
105	char ** messages = ::backtrace_symbols( array, size ); // does not demangle names
106
107	*index( messages[0], '(' ) = '\0'; // find executable name
108	cerr << "Stack back trace for: " << messages[0] << endl;
109
110	// skip last 2 stack frames after main
111	for ( int i = start; i < size - 2 && messages != nullptr; i += 1 ) {
112	char * mangled_name = nullptr, * offset_begin = nullptr, * offset_end = nullptr;
113	for ( char p = messages[i]; p; ++p ) { // find parantheses and +offset
114	if ( *p == '(' ) {
115	mangled_name = p;
116	} else if ( *p == '+' ) {
117	offset_begin = p;
118	} else if ( *p == ')' ) {
119	offset_end = p;
120	break;
121	} // if
122	} // for
123
124	// if line contains symbol, attempt to demangle
125	int frameNo = i - start;
126	if ( mangled_name && offset_begin && offset_end && mangled_name < offset_begin ) {
127	*mangled_name++ = '\0'; // delimit strings
128	*offset_begin++ = '\0';
129	*offset_end++ = '\0';
130
131	int status;
132	char * real_name = __cxxabiv1::__cxa_demangle( mangled_name, 0, 0, &status );
133	// bug in __cxa_demangle for single-character lower-case non-mangled names
134	if ( status == 0 ) { // demangling successful ?
135	cerr << "(" << frameNo << ") " << messages[i] << " : "
136	<< real_name << "+" << offset_begin << offset_end << endl;
137	} else { // otherwise, output mangled name
138	cerr << "(" << frameNo << ") " << messages[i] << " : "
139	<< mangled_name << "(/unknown/)+" << offset_begin << offset_end << endl;
140	} // if
141
142	free( real_name );
143	} else { // otherwise, print the whole line
144	cerr << "(" << frameNo << ") " << messages[i] << endl;
145	} // if
146	} // for
147
148	free( messages );
149	} // backtrace
150
151	static void sigSegvBusHandler( int sig_num ) {
152	cerr << "CFA runtime error program cfa-cpp terminated with "
153	<< (sig_num == SIGSEGV ? "segment fault" : "bus error")
154	<< "." << endl;
155	backtrace( 2 ); // skip first 2 stack frames
156	//_exit( EXIT_FAILURE );
157	abort(); // cause core dump for debugging
158	} // sigSegvBusHandler
159
160	static void sigAbortHandler( __attribute__((unused)) int sig_num ) {
161	backtrace( 6 ); // skip first 6 stack frames
162	signal( SIGABRT, SIG_DFL); // reset default signal handler
163	raise( SIGABRT ); // reraise SIGABRT
164	} // sigAbortHandler
165
166
167	int main( int argc, char * argv[] ) {
168	FILE * input; // use FILE rather than istream because yyin is FILE
169	ostream * output = & cout;
170	const char * filename = nullptr;
171	list< Declaration * > translationUnit;
172
173	signal( SIGSEGV, sigSegvBusHandler );
174	signal( SIGBUS, sigSegvBusHandler );
175	signal( SIGABRT, sigAbortHandler );
176
177	// std::cout << "main" << std::endl;
178	// for ( int i = 0; i < argc; i += 1 ) {
179	// std::cout << '\t' << argv[i] << std::endl;
180	// } // for
181
182	parse_cmdline( argc, argv, filename ); // process command-line arguments
183	CodeGen::FixMain::setReplaceMain( !nomainp );
184
185	try {
186	// choose to read the program from a file or stdin
187	if ( optind < argc ) { // any commands after the flags ? => input file name
188	input = fopen( argv[ optind ], "r" );
189	assertf( input, "cannot open %s\n", argv[ optind ] );
190	// if running cfa-cpp directly, might forget to pass -F option (and really shouldn't have to)
191	if ( filename == nullptr ) filename = argv[ optind ];
192	// prelude filename comes in differently
193	if ( libcfap ) filename = "prelude.cfa";
194	optind += 1;
195	} else { // no input file name
196	input = stdin;
197	// if running cfa-cpp directly, might forget to pass -F option. Since this takes from stdin, pass
198	// a fake name along
199	if ( filename == nullptr ) filename = "stdin";
200	} // if
201
202	Stats::Time::StartGlobal();
203	NewPass("Parse");
204	Stats::Time::StartBlock("Parse");
205
206	// read in the builtins, extras, and the prelude
207	if ( ! nopreludep ) { // include gcc builtins
208	// -l is for initial build ONLY and builtins.cf is not in the lib directory so access it here.
209
210	assertf( !PreludeDirector.empty(), "Can't find prelude without option --prelude-dir must be used." );
211
212	// Read to gcc builtins, if not generating the cfa library
213	FILE * gcc_builtins = fopen( (PreludeDirector + "/gcc-builtins.cf").c_str(), "r" );
214	assertf( gcc_builtins, "cannot open gcc-builtins.cf\n" );
215	parse( gcc_builtins, LinkageSpec::Compiler );
216
217	// read the extra prelude in, if not generating the cfa library
218	FILE * extras = fopen( (PreludeDirector + "/extras.cf").c_str(), "r" );
219	assertf( extras, "cannot open extras.cf\n" );
220	parse( extras, LinkageSpec::BuiltinC );
221
222	if ( ! libcfap ) {
223	// read the prelude in, if not generating the cfa library
224	FILE * prelude = fopen( (PreludeDirector + "/prelude.cfa").c_str(), "r" );
225	assertf( prelude, "cannot open prelude.cfa\n" );
226	parse( prelude, LinkageSpec::Intrinsic );
227
228	// Read to cfa builtins, if not generating the cfa library
229	FILE * builtins = fopen( (PreludeDirector + "/builtins.cf").c_str(), "r" );
230	assertf( builtins, "cannot open builtins.cf\n" );
231	parse( builtins, LinkageSpec::BuiltinCFA );
232	} // if
233	} // if
234
235	parse( input, libcfap ? LinkageSpec::Intrinsic : LinkageSpec::Cforall, yydebug );
236
237	if ( parsep ) {
238	parseTree->printList( cout );
239	delete parseTree;
240	return EXIT_SUCCESS;
241	} // if
242
243	buildList( parseTree, translationUnit );
244	delete parseTree;
245	parseTree = nullptr;
246
247	if ( astp ) {
248	dump( translationUnit );
249	return EXIT_SUCCESS;
250	} // if
251
252	// Temporary: fill locations after parsing so that every node has a location, for early error messages.
253	// Eventually we should pass the locations from the parser to every node, but this quick and dirty solution
254	// works okay for now.
255	CodeTools::fillLocations( translationUnit );
256	Stats::Time::StopBlock();
257
258	// add the assignment statement after the initialization of a type parameter
259	PASS( "Validate", SymTab::validate( translationUnit, symtabp ) );
260	if ( symtabp ) {
261	deleteAll( translationUnit );
262	return EXIT_SUCCESS;
263	} // if
264
265	if ( expraltp ) {
266	PassVisitor<ResolvExpr::AlternativePrinter> printer( cout );
267	acceptAll( translationUnit, printer );
268	return EXIT_SUCCESS;
269	} // if
270
271	if ( validp ) {
272	dump( translationUnit );
273	return EXIT_SUCCESS;
274	} // if
275
276	PASS( "Fix Labels", ControlStruct::fixLabels( translationUnit ) );
277	PASS( "Fix Names", CodeGen::fixNames( translationUnit ) );
278	PASS( "Gen Init", InitTweak::genInit( translationUnit ) );
279	PASS( "Expand Member Tuples" , Tuples::expandMemberTuples( translationUnit ) );
280	if ( libcfap ) {
281	// generate the bodies of cfa library functions
282	LibCfa::makeLibCfa( translationUnit );
283	} // if
284
285	if ( declstatsp ) {
286	CodeTools::printDeclStats( translationUnit );
287	deleteAll( translationUnit );
288	return EXIT_SUCCESS;
289	} // if
290
291	if ( bresolvep ) {
292	dump( translationUnit );
293	return EXIT_SUCCESS;
294	} // if
295
296	CodeTools::fillLocations( translationUnit );
297
298	if ( resolvprotop ) {
299	CodeTools::dumpAsResolvProto( translationUnit );
300	return EXIT_SUCCESS;
301	} // if
302
303	PASS( "Resolve", ResolvExpr::resolve( translationUnit ) );
304	if ( exprp ) {
305	dump( translationUnit );
306	return EXIT_SUCCESS;
307	} // if
308
309	// fix ObjectDecl - replaces ConstructorInit nodes
310	PASS( "Fix Init", InitTweak::fix( translationUnit, buildingLibrary() ) );
311	if ( ctorinitp ) {
312	dump ( translationUnit );
313	return EXIT_SUCCESS;
314	} // if
315
316	PASS( "Expand Unique Expr", Tuples::expandUniqueExpr( translationUnit ) ); // 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
317
318	PASS( "Translate EHM" , ControlStruct::translateEHM( translationUnit ) );
319
320	PASS( "Gen Waitfor" , Concurrency::generateWaitFor( translationUnit ) );
321
322	PASS( "Convert Specializations", GenPoly::convertSpecializations( translationUnit ) ); // needs to happen before tuple types are expanded
323
324	PASS( "Expand Tuples", Tuples::expandTuples( translationUnit ) ); // xxx - is this the right place for this?
325
326	if ( tuplep ) {
327	dump( translationUnit );
328	return EXIT_SUCCESS;
329	} // if
330
331	PASS( "Virtual Expand Casts", Virtual::expandCasts( translationUnit ) ); // Must come after translateEHM
332
333	PASS( "Instantiate Generics", GenPoly::instantiateGeneric( translationUnit ) );
334	if ( genericsp ) {
335	dump( translationUnit );
336	return EXIT_SUCCESS;
337	} // if
338	PASS( "Convert L-Value", GenPoly::convertLvalue( translationUnit ) );
339
340
341	if ( bboxp ) {
342	dump( translationUnit );
343	return EXIT_SUCCESS;
344	} // if
345	PASS( "Box", GenPoly::box( translationUnit ) );
346
347	if ( bcodegenp ) {
348	dump( translationUnit );
349	return EXIT_SUCCESS;
350	} // if
351
352	if ( optind < argc ) { // any commands after the flags and input file ? => output file name
353	output = new ofstream( argv[ optind ] );
354	} // if
355
356	CodeTools::fillLocations( translationUnit );
357	PASS( "Code Gen", CodeGen::generate( translationUnit, *output, ! noprotop, prettycodegenp, true, linemarks ) );
358
359	CodeGen::FixMain::fix( *output, (PreludeDirector + "/bootloader.c").c_str() );
360	if ( output != &cout ) {
361	delete output;
362	} // if
363	} catch ( SemanticErrorException &e ) {
364	if ( errorp ) {
365	cerr << "---AST at error:---" << endl;
366	dump( translationUnit, cerr );
367	cerr << endl << "---End of AST, begin error message:---\n" << endl;
368	} // if
369	e.print();
370	if ( output != &cout ) {
371	delete output;
372	} // if
373	return EXIT_FAILURE;
374	} catch ( UnimplementedError &e ) {
375	cout << "Sorry, " << e.get_what() << " is not currently implemented" << endl;
376	if ( output != &cout ) {
377	delete output;
378	} // if
379	return EXIT_FAILURE;
380	} catch ( CompilerError &e ) {
381	cerr << "Compiler Error: " << e.get_what() << endl;
382	cerr << "(please report bugs to [REDACTED])" << endl;
383	if ( output != &cout ) {
384	delete output;
385	} // if
386	return EXIT_FAILURE;
387	} catch ( ... ) {
388	std::exception_ptr eptr = std::current_exception();
389	try {
390	if (eptr) {
391	std::rethrow_exception(eptr);
392	} else {
393	std::cerr << "Exception Uncaught and Unknown" << std::endl;
394	} // if
395	} catch(const std::exception& e) {
396	std::cerr << "Uncaught Exception \"" << e.what() << "\"\n";
397	} // try
398	return EXIT_FAILURE;
399	} // try
400
401	deleteAll( translationUnit );
402	Stats::print();
403	return EXIT_SUCCESS;
404	} // main
405
406
407	static const char optstring[] = ":abBcCdeEGghlLmNnpP:qrRS:stTvwW:yzZD:F:";
408
409	static struct option long_opts[] = {
410	{ "ast", no_argument, nullptr, 'a' },
411	{ "before-resolver", no_argument, nullptr, 'b' },
412	{ "box", no_argument, nullptr, 'B' },
413	{ "ctorinitfix", no_argument, nullptr, 'c' },
414	{ "code", no_argument, nullptr, 'C' },
415	{ "decl-stmts", no_argument, nullptr, 'd' },
416	{ "expr", no_argument, nullptr, 'e' },
417	{ "expralt", no_argument, nullptr, 'E' },
418	{ "generics", no_argument, nullptr, 'G' },
419	{ "grammar", no_argument, nullptr, 'g' },
420	{ "help", no_argument, nullptr, 'h' },
421	{ "libcfa", no_argument, nullptr, 'l' },
422	{ "line-marks", no_argument, nullptr, 'L' },
423	{ "no-main", no_argument, 0, 'm' },
424	{ "no-line-marks", no_argument, nullptr, 'N' },
425	{ "no-preamble", no_argument, nullptr, 'n' },
426	{ "prototypes", no_argument, nullptr, 'p' },
427	{ "prelude-dir <directory>", required_argument, nullptr, 'P' },
428	{ "parse-tree", no_argument, nullptr, 'q' },
429	{ "resolver", no_argument, nullptr, 'r' },
430	{ "resolver-proto", no_argument, nullptr, 'R' },
431	{ "statistics <option-list>", required_argument, nullptr, 'S' },
432	{ "symbol", no_argument, nullptr, 's' },
433	{ "tree", no_argument, nullptr, 't' },
434	{ "tuple", no_argument, nullptr, 'T' },
435	{ "validate", no_argument, nullptr, 'v' },
436	{ "", no_argument, nullptr, 0 }, // -w
437	{ "", no_argument, nullptr, 0 }, // -W
438	{ "dump-ast-on-error", no_argument, nullptr, 'y' },
439	{ "dump-ast-code", no_argument, nullptr, 'z' },
440	{ "prettyprint-codegen", no_argument, nullptr, 'Z' },
441	{ "", no_argument, nullptr, 0 }, // -D
442	{ "", no_argument, nullptr, 0 }, // -F
443	{ nullptr, 0, nullptr, 0 }
444	}; // long_opts
445
446	static const char * description[] = {
447	"dump AST", // -a
448	"print before resolver step", // -b
449	"print before box step", // -B
450	"print after ctor/dtor are replaced", // -c
451	"print before code generation", // -C
452	"print declaration statements", // -d
453	"dump AST after expression analysis", // -e
454	"print alternatives for expressions", // -E
455	"dump AST after instantiate generics", // -G
456	"print bison (parsing) debugging information", // -g
457	"help message", // -h
458	"generate libcfa.c", // -l
459	"print line marks", // -L
460	"do not replace main", // -m
461	"suppress line marks", // -N
462	"do not read preamble", // -n
463	"generate prototypes for preamble functions", // -p
464	"prelude directory for debug/nodebug", // -P
465	"dump parse tree", // -q
466	"print resolver steps", // -r
467	"dump resolver-proto instance", // -R
468	"enable profiling information: counters,heap,time", // -S
469	"print symbol table events", // -s
470	"build in tree", // -t
471	"print after tuple expansion", // -T
472	"dump AST after declaration validation pass", // -v
473	"", // -w
474	"", // -W
475	"dump AST on error", // -y
476	"dump as codegen rather than AST", // -z
477	"prettyprint during codegen", // -Z
478	"", // -D
479	"", // -F
480	}; // description
481
482	static void usage( char *argv[] ) {
483	cout << "Usage: " << argv[0] << " options are:" << endl;
484	int i = 0, j = 1; // j skips starting colon
485	for ( ; long_opts[i].name != 0 && optstring[j] != '\0'; i += 1, j += 1 ) {
486	if ( long_opts[i].name[0] != '\0' ) { // hidden option, internal usage only
487	cout << " -" << optstring[j] << ", --" << long_opts[i].name << " " << description[i] << endl;
488	} // if
489	if ( optstring[j+1] == ':' ) j += 1;
490	} // for
491	if ( long_opts[i].name != 0 \|\| optstring[j] != '\0' ) assertf( false, "internal error, mismatch of option flags and names\n" );
492	exit( EXIT_FAILURE );
493	} // usage
494
495	static void parse_cmdline( int argc, char * argv[], const char *& filename ) {
496	opterr = 0; // (global) prevent getopt from printing error messages
497
498	bool Wsuppress = false, Werror = false;
499	int c;
500	while ( (c = getopt_long( argc, argv, optstring, long_opts, nullptr )) != -1 ) {
501	switch ( c ) {
502	case 'a': // dump AST
503	astp = true;
504	break;
505	case 'b': // print before resolver steps
506	bresolvep = true;
507	break;
508	case 'B': // print before box steps
509	bboxp = true;
510	break;
511	case 'c': // print after ctor/dtor are replaced
512	ctorinitp = true;
513	break;
514	case 'C': // print before code generation
515	bcodegenp = true;
516	break;
517	case 'd': // print declaration statements
518	declstatsp = true;
519	break;
520	case 'e': // dump AST after expression analysis
521	exprp = true;
522	break;
523	case 'E': // print alternatives for expressions
524	expraltp = true;
525	break;
526	case 'G': // dump AST after instantiate generics
527	genericsp = true;
528	break;
529	case 'g': // print bison (parsing) debugging information
530	yydebug = true;
531	break;
532	case 'h': // help message
533	usage( argv ); // no return
534	break;
535	case 'l': // generate libcfa.c
536	libcfap = true;
537	break;
538	case 'L': // print line marks
539	linemarks = true;
540	break;
541	case 'm': // do not replace main
542	nomainp = true;
543	break;
544	case 'N': // suppress line marks
545	linemarks = false;
546	break;
547	case 'n': // do not read preamble
548	nopreludep = true;
549	break;
550	case 'p': // generate prototypes for preamble functions
551	noprotop = true;
552	break;
553	case 'P': // prelude directory for debug/nodebug, hidden
554	PreludeDirector = optarg;
555	break;
556	case 'q': // dump parse tree
557	parsep = true;
558	break;
559	case 'r': // print resolver steps
560	resolvep = true;
561	break;
562	case 'R': // dump resolver-proto instance
563	resolvprotop = true;
564	break;
565	case 'S': // enable profiling information, argument comma separated list of names
566	Stats::parse_params( optarg );
567	break;
568	case 's': // print symbol table events
569	symtabp = true;
570	break;
571	case 't': // build in tree
572	treep = true;
573	break;
574	case 'T': // print after tuple expansion
575	tuplep = true;
576	break;
577	case 'v': // dump AST after declaration validation pass
578	validp = true;
579	break;
580	case 'w': // suppress all warnings, hidden
581	Wsuppress = true;
582	break;
583	case 'W': // coordinate gcc -W with CFA, hidden
584	if ( strcmp( optarg, "all" ) == 0 ) {
585	SemanticWarning_EnableAll();
586	} else if ( strcmp( optarg, "error" ) == 0 ) {
587	Werror = true;
588	} else {
589	char * warning = optarg;
590	Severity s;
591	if ( strncmp( optarg, "no-", 3 ) == 0 ) {
592	warning += 3;
593	s = Severity::Suppress;
594	} else {
595	s = Severity::Warn;
596	} // if
597	SemanticWarning_Set( warning, s );
598	} // if
599	break;
600	case 'y': // dump AST on error
601	errorp = true;
602	break;
603	case 'z': // dump as codegen rather than AST
604	codegenp = true;
605	break;
606	case 'Z': // prettyprint during codegen (i.e. print unmangled names, etc.)
607	prettycodegenp = true;
608	break;
609	case 'D': // ignore -Dxxx, forwarded by cpp, hidden
610	break;
611	case 'F': // source file-name without suffix, hidden
612	filename = optarg;
613	break;
614	case '?': // unknown option
615	if ( optopt ) { // short option ?
616	cout << "Unknown option -" << (char)optopt << endl;
617	} else {
618	cout << "Unknown option " << argv[optind - 1] << endl;
619	} // if
620	goto Default;
621	case ':': // missing option
622	if ( optopt ) { // short option ?
623	cout << "Missing option for -" << (char)optopt << endl;
624	} else {
625	cout << "Missing option for " << argv[optind - 1] << endl;
626	} // if
627	goto Default;
628	Default:
629	default:
630	usage( argv ); // no return
631	} // switch
632	} // while
633
634	if ( Werror ) {
635	SemanticWarning_WarningAsError();
636	} // if
637	if ( Wsuppress ) {
638	SemanticWarning_SuppressAll();
639	} // if
640	// for ( const auto w : WarningFormats ) {
641	// cout << w.name << ' ' << (int)w.severity << endl;
642	// } // for
643	} // parse_cmdline
644
645	static void parse( FILE * input, LinkageSpec::Spec linkage, bool shouldExit ) {
646	extern int yyparse( void );
647	extern FILE * yyin;
648	extern int yylineno;
649
650	::linkage = linkage; // set globals
651	yyin = input;
652	yylineno = 1;
653	int parseStatus = yyparse();
654
655	fclose( input );
656	if ( shouldExit \|\| parseStatus != 0 ) {
657	exit( parseStatus );
658	} // if
659	} // parse
660
661	static bool notPrelude( Declaration * decl ) {
662	return ! LinkageSpec::isBuiltin( decl->get_linkage() );
663	} // notPrelude
664
665	static void dump( list< Declaration * > & translationUnit, ostream & out ) {
666	list< Declaration * > decls;
667
668	if ( noprotop ) {
669	filter( translationUnit.begin(), translationUnit.end(), back_inserter( decls ), notPrelude );
670	} else {
671	decls = translationUnit;
672	} // if
673
674	// depending on commandline options, either generate code or dump the AST
675	if ( codegenp ) {
676	CodeGen::generate( decls, out, ! noprotop, prettycodegenp );
677	} else {
678	printAll( decls, out );
679	} // if
680	deleteAll( translationUnit );
681	} // dump
682
683	// Local Variables: //
684	// tab-width: 4 //
685	// mode: c++ //
686	// compile-command: "make install" //
687	// End: //

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