1 /*****************************************************************************/
5 /* Top level compiler subroutine */
9 /* (C) 2000-2013, Ullrich von Bassewitz */
10 /* Roemerstrasse 52 */
11 /* D-70794 Filderstadt */
12 /* EMail: uz@cc65.org */
15 /* This software is provided 'as-is', without any expressed or implied */
16 /* warranty. In no event will the authors be held liable for any damages */
17 /* arising from the use of this software. */
19 /* Permission is granted to anyone to use this software for any purpose, */
20 /* including commercial applications, and to alter it and redistribute it */
21 /* freely, subject to the following restrictions: */
23 /* 1. The origin of this software must not be misrepresented; you must not */
24 /* claim that you wrote the original software. If you use this software */
25 /* in a product, an acknowledgment in the product documentation would be */
26 /* appreciated but is not required. */
27 /* 2. Altered source versions must be plainly marked as such, and must not */
28 /* be misrepresented as being the original software. */
29 /* 3. This notice may not be removed or altered from any source */
32 /*****************************************************************************/
40 #include "debugflag.h"
67 /*****************************************************************************/
69 /*****************************************************************************/
73 static void Parse (void)
74 /* Top level parser routine. */
83 /* Parse until end of input */
84 while (CurTok.Tok != TOK_CEOF) {
88 /* Check for empty statements */
89 if (CurTok.Tok == TOK_SEMI) {
94 /* Disallow ASM statements on global level */
95 if (CurTok.Tok == TOK_ASM) {
96 Error ("__asm__ is not allowed here");
97 /* Parse and remove the statement for error recovery */
104 /* Check for a #pragma */
105 if (CurTok.Tok == TOK_PRAGMA) {
110 /* Read variable defs and functions */
111 ParseDeclSpec (&Spec, SC_EXTERN | SC_STATIC, T_INT);
113 /* Don't accept illegal storage classes */
114 if ((Spec.StorageClass & SC_TYPE) == 0) {
115 if ((Spec.StorageClass & SC_AUTO) != 0 ||
116 (Spec.StorageClass & SC_REGISTER) != 0) {
117 Error ("Illegal storage class");
118 Spec.StorageClass = SC_EXTERN | SC_STATIC;
122 /* Check if this is only a type declaration */
123 if (CurTok.Tok == TOK_SEMI) {
124 CheckEmptyDecl (&Spec);
129 /* Read declarations for this type */
136 /* Read the next declaration */
137 ParseDecl (&Spec, &Decl, DM_NEED_IDENT);
138 if (Decl.Ident[0] == '\0') {
143 /* Check if we must reserve storage for the variable. We do this,
145 ** - if it is not a typedef or function,
146 ** - if we don't had a storage class given ("int i")
147 ** or the storage class is explicitly specified as static.
149 ** This means that "extern int i;" will not get storage allocated.
151 if ((Decl.StorageClass & SC_FUNC) != SC_FUNC &&
152 (Decl.StorageClass & SC_TYPEMASK) != SC_TYPEDEF &&
153 ((Spec.Flags & DS_DEF_STORAGE) != 0 ||
154 (Decl.StorageClass & (SC_EXTERN|SC_STATIC)) == SC_STATIC)) {
156 /* We will allocate storage */
157 Decl.StorageClass |= SC_STORAGE;
160 /* If this is a function declarator that is not followed by a comma
161 ** or semicolon, it must be followed by a function body. If this is
162 ** the case, convert an empty parameter list into one accepting no
163 ** parameters (same as void) as required by the standard.
165 if ((Decl.StorageClass & SC_FUNC) != 0 &&
166 (CurTok.Tok != TOK_COMMA) &&
167 (CurTok.Tok != TOK_SEMI)) {
169 FuncDesc* D = GetFuncDesc (Decl.Type);
170 if (D->Flags & FD_EMPTY) {
171 D->Flags = (D->Flags & ~(FD_EMPTY | FD_VARIADIC)) | FD_VOID_PARAM;
175 /* Add an entry to the symbol table */
176 Entry = AddGlobalSym (Decl.Ident, Decl.Type, Decl.StorageClass);
178 /* Add declaration attributes */
179 SymUseAttr (Entry, &Decl);
181 /* Reserve storage for the variable if we need to */
182 if (Decl.StorageClass & SC_STORAGE) {
184 /* Get the size of the variable */
185 unsigned Size = SizeOf (Decl.Type);
187 /* Allow initialization */
188 if (CurTok.Tok == TOK_ASSIGN) {
190 /* This is a definition */
191 Entry->Flags |= SC_DEF;
193 /* We cannot initialize types of unknown size, or
194 ** void types in ISO modes.
197 if (!IsTypeVoid (Decl.Type)) {
198 if (!IsTypeArray (Decl.Type)) {
199 /* Size is unknown and not an array */
200 Error ("Variable `%s' has unknown size", Decl.Ident);
202 } else if (IS_Get (&Standard) != STD_CC65) {
203 /* We cannot declare variables of type void */
204 Error ("Illegal type for variable `%s'", Decl.Ident);
208 /* Switch to the data or rodata segment. For arrays, check
209 ** the element qualifiers, since not the array but its
210 ** elements are const.
212 if (IsQualConst (GetBaseElementType (Decl.Type))) {
219 g_defgloblabel (Entry->Name);
224 /* Parse the initialization */
225 ParseInit (Entry->Type);
228 if (IsTypeVoid (Decl.Type)) {
229 /* We cannot declare variables of type void */
230 Error ("Illegal type for variable `%s'", Decl.Ident);
231 Entry->Flags &= ~(SC_STORAGE | SC_DEF);
232 } else if (Size == 0) {
233 /* Size is unknown. Is it an array? */
234 if (!IsTypeArray (Decl.Type)) {
235 Error ("Variable `%s' has unknown size", Decl.Ident);
237 Entry->Flags &= ~(SC_STORAGE | SC_DEF);
240 /* A global (including static) uninitialized variable
241 ** is only a tentative definition. For example, this is valid:
245 ** static int j = 42;
246 ** Code for these will be generated in FinishCompile.
252 /* Check for end of declaration list */
253 if (CurTok.Tok == TOK_COMMA) {
261 /* Function declaration? */
262 if (Entry && IsTypeFunc (Entry->Type)) {
266 if (CurTok.Tok == TOK_SEMI) {
271 /* Function body. Check for duplicate function definitions */
272 if (SymIsDef (Entry)) {
273 Error ("Body for function `%s' has already been defined",
277 /* Parse the function body */
284 /* Must be followed by a semicolon */
293 void Compile (const char* FileName)
294 /* Top level compile routine. Will setup things and call the parser. */
301 /* Since strftime is locale dependent, we need the abbreviated month names
304 static const char MonthNames[12][4] = {
305 "Jan", "Feb", "Mar", "Apr", "May", "Jun",
306 "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"
309 /* Add macros that are always defined */
310 DefineNumericMacro ("__CC65__", GetVersionAsNumber ());
312 /* Language standard that is supported */
313 DefineNumericMacro ("__CC65_STD_C89__", STD_C89);
314 DefineNumericMacro ("__CC65_STD_C99__", STD_C99);
315 DefineNumericMacro ("__CC65_STD_CC65__", STD_CC65);
316 DefineNumericMacro ("__CC65_STD__", IS_Get (&Standard));
318 /* Optimization macros. Since no source code has been parsed for now, the
319 ** IS_Get functions access the values in effect now, regardless of any
320 ** changes using #pragma later.
322 if (IS_Get (&Optimize)) {
323 long CodeSize = IS_Get (&CodeSizeFactor);
324 DefineNumericMacro ("__OPT__", 1);
325 if (CodeSize > 100) {
326 DefineNumericMacro ("__OPT_i__", CodeSize);
328 if (IS_Get (&EnableRegVars)) {
329 DefineNumericMacro ("__OPT_r__", 1);
331 if (IS_Get (&InlineStdFuncs)) {
332 DefineNumericMacro ("__OPT_s__", 1);
336 /* __TIME__ and __DATE__ macros */
338 TM = localtime (&Time);
339 xsprintf (DateStr, sizeof (DateStr), "\"%s %2d %d\"",
340 MonthNames[TM->tm_mon], TM->tm_mday, TM->tm_year + 1900);
341 strftime (TimeStr, sizeof (TimeStr), "\"%H:%M:%S\"", TM);
342 DefineTextMacro ("__DATE__", DateStr);
343 DefineTextMacro ("__TIME__", TimeStr);
345 /* Other standard macros */
346 /* DefineNumericMacro ("__STDC__", 1); <- not now */
347 DefineNumericMacro ("__STDC_HOSTED__", 1);
349 /* Create the base lexical level */
352 /* Create the global code and data segments */
353 CreateGlobalSegments ();
355 /* Initialize the literal pool */
358 /* Generate the code generator preamble */
361 /* Open the input file */
362 OpenMainFile (FileName);
364 /* Are we supposed to compile or just preprocess the input? */
365 if (PreprocessOnly) {
370 /* Preprocess each line and write it to the output file */
371 while (NextLine ()) {
373 WriteOutput ("%.*s\n", (int) SB_GetLen (Line), SB_GetConstBuf (Line));
376 /* Close the output file */
381 /* Ok, start the ball rolling... */
387 PrintMacroStats (stdout);
390 /* Print an error report */
396 void FinishCompile (void)
397 /* Emit literals, externals, debug info, do cleanup and optimizations */
401 /* Walk over all global symbols:
402 ** - for functions do cleanup, optimizations ...
403 ** - generate code for uninitialized global variables
405 for (Entry = GetGlobalSymTab ()->SymHead; Entry; Entry = Entry->NextSym) {
406 if (SymIsOutputFunc (Entry)) {
407 /* Function which is defined and referenced or extern */
408 MoveLiteralPool (Entry->V.F.LitPool);
409 CS_MergeLabels (Entry->V.F.Seg->Code);
410 RunOpt (Entry->V.F.Seg->Code);
411 } else if ((Entry->Flags & (SC_STORAGE | SC_DEF | SC_STATIC)) == (SC_STORAGE | SC_STATIC)) {
412 /* Tentative definition of uninitialized global variable */
414 g_defgloblabel (Entry->Name);
415 g_res (SizeOf (Entry->Type));
416 /* Mark as defined, so that it will be exported not imported */
417 Entry->Flags |= SC_DEF;
421 /* Output the literal pool */
422 OutputLiteralPool ();
424 /* Emit debug infos if enabled */
427 /* Write imported/exported symbols */
430 /* Leave the main lexical level */