1 /*****************************************************************************/
5 /* Top level compiler subroutine */
9 /* (C) 2000-2009, 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 /* Check for an ASM statement (which is allowed also on global level) */
95 if (CurTok.Tok == TOK_ASM) {
101 /* Check for a #pragma */
102 if (CurTok.Tok == TOK_PRAGMA) {
107 /* Read variable defs and functions */
108 ParseDeclSpec (&Spec, SC_EXTERN | SC_STATIC, T_INT);
110 /* Don't accept illegal storage classes */
111 if ((Spec.StorageClass & SC_TYPE) == 0) {
112 if ((Spec.StorageClass & SC_AUTO) != 0 ||
113 (Spec.StorageClass & SC_REGISTER) != 0) {
114 Error ("Illegal storage class");
115 Spec.StorageClass = SC_EXTERN | SC_STATIC;
119 /* Check if this is only a type declaration */
120 if (CurTok.Tok == TOK_SEMI) {
121 CheckEmptyDecl (&Spec);
126 /* Read declarations for this type */
133 /* Read the next declaration */
134 ParseDecl (&Spec, &Decl, DM_NEED_IDENT);
135 if (Decl.Ident[0] == '\0') {
140 /* Check if we must reserve storage for the variable. We do this,
141 * if it is not a typedef or function, if we don't had a storage
142 * class given ("int i") or if the storage class is explicitly
143 * specified as static. This means that "extern int i" will not
144 * get storage allocated.
146 if ((Decl.StorageClass & SC_FUNC) != SC_FUNC &&
147 (Decl.StorageClass & SC_TYPEDEF) != SC_TYPEDEF &&
148 ((Spec.Flags & DS_DEF_STORAGE) != 0 ||
149 (Decl.StorageClass & (SC_STATIC | SC_EXTERN)) == SC_STATIC)) {
151 /* We will allocate storage */
152 Decl.StorageClass |= SC_STORAGE | SC_DEF;
155 /* If this is a function declarator that is not followed by a comma
156 * or semicolon, it must be followed by a function body. If this is
157 * the case, convert an empty parameter list into one accepting no
158 * parameters (same as void) as required by the standard.
160 if ((Decl.StorageClass & SC_FUNC) != 0 &&
161 (CurTok.Tok != TOK_COMMA) &&
162 (CurTok.Tok != TOK_SEMI)) {
164 FuncDesc* D = GetFuncDesc (Decl.Type);
165 if (D->Flags & FD_EMPTY) {
166 D->Flags = (D->Flags & ~(FD_EMPTY | FD_VARIADIC)) | FD_VOID_PARAM;
170 /* Add an entry to the symbol table */
171 Entry = AddGlobalSym (Decl.Ident, Decl.Type, Decl.StorageClass);
173 /* Add declaration attributes */
174 SymUseAttr (Entry, &Decl);
176 /* Reserve storage for the variable if we need to */
177 if (Decl.StorageClass & SC_STORAGE) {
179 /* Get the size of the variable */
180 unsigned Size = SizeOf (Decl.Type);
182 /* Allow initialization */
183 if (CurTok.Tok == TOK_ASSIGN) {
185 /* We cannot initialize types of unknown size, or
186 * void types in non ANSI mode.
189 if (!IsTypeVoid (Decl.Type)) {
190 if (!IsTypeArray (Decl.Type)) {
191 /* Size is unknown and not an array */
192 Error ("Variable `%s' has unknown size", Decl.Ident);
194 } else if (IS_Get (&Standard) != STD_CC65) {
195 /* We cannot declare variables of type void */
196 Error ("Illegal type for variable `%s'", Decl.Ident);
200 /* Switch to the data or rodata segment. For arrays, check
201 * the element qualifiers, since not the array but its
202 * elements are const.
204 if (IsQualConst (Decl.Type) ||
205 (IsTypeArray (Decl.Type) &&
206 IsQualConst (GetElementType (Decl.Type)))) {
213 g_defgloblabel (Entry->Name);
218 /* Parse the initialization */
219 ParseInit (Entry->Type);
222 if (IsTypeVoid (Decl.Type)) {
223 /* We cannot declare variables of type void */
224 Error ("Illegal type for variable `%s'", Decl.Ident);
225 Entry->Flags &= ~(SC_STORAGE | SC_DEF);
226 } else if (Size == 0) {
227 /* Size is unknown. Is it an array? */
228 if (!IsTypeArray (Decl.Type)) {
229 Error ("Variable `%s' has unknown size", Decl.Ident);
231 Entry->Flags &= ~(SC_STORAGE | SC_DEF);
234 /* Allocate storage if it is still needed */
235 if (Entry->Flags & SC_STORAGE) {
237 /* Switch to the BSS segment */
241 g_defgloblabel (Entry->Name);
243 /* Allocate space for uninitialized variable */
250 /* Check for end of declaration list */
251 if (CurTok.Tok == TOK_COMMA) {
259 /* Function declaration? */
260 if (Entry && IsTypeFunc (Entry->Type)) {
264 if (CurTok.Tok == TOK_SEMI) {
269 /* Function body. Check for duplicate function definitions */
270 if (SymIsDef (Entry)) {
271 Error ("Body for function `%s' has already been defined",
275 /* Parse the function body */
282 /* Must be followed by a semicolon */
291 void Compile (const char* FileName)
292 /* Top level compile routine. Will setup things and call the parser. */
299 /* Since strftime is locale dependent, we need the abbreviated month names
302 static const char MonthNames[12][4] = {
303 "Jan", "Feb", "Mar", "Apr", "May", "Jun",
304 "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"
307 /* Add macros that are always defined */
308 DefineNumericMacro ("__CC65__", GetVersionAsNumber ());
310 /* Language standard that is supported */
311 DefineNumericMacro ("__CC65_STD_C89__", STD_C89);
312 DefineNumericMacro ("__CC65_STD_C99__", STD_C99);
313 DefineNumericMacro ("__CC65_STD_CC65__", STD_CC65);
314 DefineNumericMacro ("__CC65_STD__", IS_Get (&Standard));
316 /* Optimization macros. Since no source code has been parsed for now, the
317 * IS_Get functions access the values in effect now, regardless of any
318 * changes using #pragma later.
320 if (IS_Get (&Optimize)) {
321 long CodeSize = IS_Get (&CodeSizeFactor);
322 DefineNumericMacro ("__OPT__", 1);
323 if (CodeSize > 100) {
324 DefineNumericMacro ("__OPT_i__", CodeSize);
326 if (IS_Get (&EnableRegVars)) {
327 DefineNumericMacro ("__OPT_r__", 1);
329 if (IS_Get (&InlineStdFuncs)) {
330 DefineNumericMacro ("__OPT_s__", 1);
334 /* __TIME__ and __DATE__ macros */
336 TM = localtime (&Time);
337 xsprintf (DateStr, sizeof (DateStr), "\"%s %2d %d\"",
338 MonthNames[TM->tm_mon], TM->tm_mday, TM->tm_year + 1900);
339 strftime (TimeStr, sizeof (TimeStr), "\"%H:%M:%S\"", TM);
340 DefineTextMacro ("__DATE__", DateStr);
341 DefineTextMacro ("__TIME__", TimeStr);
343 /* Other standard macros */
344 /* DefineNumericMacro ("__STDC__", 1); <- not now */
345 DefineNumericMacro ("__STDC_HOSTED__", 1);
347 /* Create the base lexical level */
350 /* Create the global code and data segments */
351 CreateGlobalSegments ();
353 /* Initialize the literal pool */
356 /* Generate the code generator preamble */
359 /* Open the input file */
360 OpenMainFile (FileName);
362 /* Are we supposed to compile or just preprocess the input? */
363 if (PreprocessOnly) {
368 /* Preprocess each line and write it to the output file */
369 while (NextLine ()) {
371 WriteOutput ("%.*s\n", (int) SB_GetLen (Line), SB_GetConstBuf (Line));
374 /* Close the output file */
379 /* Ok, start the ball rolling... */
385 PrintMacroStats (stdout);
388 /* Print an error report */
394 void FinishCompile (void)
395 /* Emit literals, externals, do cleanup and optimizations */
400 /* Walk over all functions, doing cleanup, optimizations ... */
401 SymTab = GetGlobalSymTab ();
402 Func = SymTab->SymHead;
404 if (SymIsOutputFunc (Func)) {
405 /* Function which is defined and referenced or extern */
406 MoveLiteralPool (Func->V.F.LitPool);
407 CS_MergeLabels (Func->V.F.Seg->Code);
408 RunOpt (Func->V.F.Seg->Code);
410 Func = Func->NextSym;
413 /* Output the literal pool */
414 OutputLiteralPool ();
416 /* Write imported/exported symbols */
419 /* Leave the main lexical level */