From 1c7864f6d4380797b07c7149111066b61f69f689 Mon Sep 17 00:00:00 2001 From: tma Date: Tue, 4 Oct 2005 15:18:22 +0000 Subject: * Moved lcc and q3asm into code/tools git-svn-id: svn://svn.icculus.org/quake3/trunk@134 edf5b092-35ff-0310-97b2-ce42778d08ea --- lcc/src/decl.c | 1162 -------------------------------------------------------- 1 file changed, 1162 deletions(-) delete mode 100644 lcc/src/decl.c (limited to 'lcc/src/decl.c') diff --git a/lcc/src/decl.c b/lcc/src/decl.c deleted file mode 100644 index 132241e..0000000 --- a/lcc/src/decl.c +++ /dev/null @@ -1,1162 +0,0 @@ -#include "c.h" - - -#define add(x,n) (x > inttype->u.sym->u.limits.max.i-(n) ? (overflow=1,x) : x+(n)) -#define chkoverflow(x,n) ((void)add(x,n)) -#define bits2bytes(n) (((n) + 7)/8) -static int regcount; - -static List autos, registers; -Symbol cfunc; /* current function */ -Symbol retv; /* return value location for structs */ - -static void checkref(Symbol, void *); -static Symbol dclglobal(int, char *, Type, Coordinate *); -static Symbol dcllocal(int, char *, Type, Coordinate *); -static Symbol dclparam(int, char *, Type, Coordinate *); -static Type dclr(Type, char **, Symbol **, int); -static Type dclr1(char **, Symbol **, int); -static void decl(Symbol (*)(int, char *, Type, Coordinate *)); -extern void doconst(Symbol, void *); -static void doglobal(Symbol, void *); -static void doextern(Symbol, void *); -static void exitparams(Symbol []); -static void fields(Type); -static void funcdefn(int, char *, Type, Symbol [], Coordinate); -static void initglobal(Symbol, int); -static void oldparam(Symbol, void *); -static Symbol *parameters(Type); -static Type specifier(int *); -static Type structdcl(int); -static Type tnode(int, Type); -void program(void) { - int n; - - level = GLOBAL; - for (n = 0; t != EOI; n++) - if (kind[t] == CHAR || kind[t] == STATIC - || t == ID || t == '*' || t == '(') { - decl(dclglobal); - deallocate(STMT); - if (!(glevel >= 3 || xref)) - deallocate(FUNC); - } else if (t == ';') { - warning("empty declaration\n"); - t = gettok(); - } else { - error("unrecognized declaration\n"); - t = gettok(); - } - if (n == 0) - warning("empty input file\n"); -} -static Type specifier(int *sclass) { - int cls, cons, sign, size, type, vol; - Type ty = NULL; - - cls = vol = cons = sign = size = type = 0; - if (sclass == NULL) - cls = AUTO; - for (;;) { - int *p, tt = t; - switch (t) { - case AUTO: - case REGISTER: if (level <= GLOBAL && cls == 0) - error("invalid use of `%k'\n", t); - p = &cls; t = gettok(); break; - case STATIC: case EXTERN: - case TYPEDEF: p = &cls; t = gettok(); break; - case CONST: p = &cons; t = gettok(); break; - case VOLATILE: p = &vol; t = gettok(); break; - case SIGNED: - case UNSIGNED: p = &sign; t = gettok(); break; - case LONG: if (size == LONG) { - size = 0; - tt = LONG+LONG; - } - p = &size; t = gettok(); break; - case SHORT: p = &size; t = gettok(); break; - case VOID: case CHAR: case INT: case FLOAT: - case DOUBLE: p = &type; ty = tsym->type; - t = gettok(); break; - case ENUM: p = &type; ty = enumdcl(); break; - case STRUCT: - case UNION: p = &type; ty = structdcl(t); break; - case ID: - if (istypename(t, tsym) && type == 0 - && sign == 0 && size == 0) { - use(tsym, src); - ty = tsym->type; - if (isqual(ty) - && ty->size != ty->type->size) { - ty = unqual(ty); - if (isconst(tsym->type)) - ty = qual(CONST, ty); - if (isvolatile(tsym->type)) - ty = qual(VOLATILE, ty); - tsym->type = ty; - } - p = &type; - t = gettok(); - } else - p = NULL; - break; - default: p = NULL; - } - if (p == NULL) - break; - if (*p) - error("invalid use of `%k'\n", tt); - *p = tt; - } - if (sclass) - *sclass = cls; - if (type == 0) { - type = INT; - ty = inttype; - } - if ((size == SHORT && type != INT) - || (size == LONG+LONG && type != INT) - || (size == LONG && type != INT && type != DOUBLE) - || (sign && type != INT && type != CHAR)) - error("invalid type specification\n"); - if (type == CHAR && sign) - ty = sign == UNSIGNED ? unsignedchar : signedchar; - else if (size == SHORT) - ty = sign == UNSIGNED ? unsignedshort : shorttype; - else if (size == LONG && type == DOUBLE) - ty = longdouble; - else if (size == LONG+LONG) { - ty = sign == UNSIGNED ? unsignedlonglong : longlong; - if (Aflag >= 1) - warning("`%t' is a non-ANSI type\n", ty); - } else if (size == LONG) - ty = sign == UNSIGNED ? unsignedlong : longtype; - else if (sign == UNSIGNED && type == INT) - ty = unsignedtype; - if (cons == CONST) - ty = qual(CONST, ty); - if (vol == VOLATILE) - ty = qual(VOLATILE, ty); - return ty; -} -static void decl(Symbol (*dcl)(int, char *, Type, Coordinate *)) { - int sclass; - Type ty, ty1; - static char stop[] = { CHAR, STATIC, ID, 0 }; - - ty = specifier(&sclass); - if (t == ID || t == '*' || t == '(' || t == '[') { - char *id; - Coordinate pos; - id = NULL; - pos = src; - if (level == GLOBAL) { - Symbol *params = NULL; - ty1 = dclr(ty, &id, ¶ms, 0); - if (params && id && isfunc(ty1) - && (t == '{' || istypename(t, tsym) - || (kind[t] == STATIC && t != TYPEDEF))) { - if (sclass == TYPEDEF) { - error("invalid use of `typedef'\n"); - sclass = EXTERN; - } - if (ty1->u.f.oldstyle) - exitscope(); - funcdefn(sclass, id, ty1, params, pos); - return; - } else if (params) - exitparams(params); - } else - ty1 = dclr(ty, &id, NULL, 0); - for (;;) { - if (Aflag >= 1 && !hasproto(ty1)) - warning("missing prototype\n"); - if (id == NULL) - error("missing identifier\n"); - else if (sclass == TYPEDEF) - { - Symbol p = lookup(id, identifiers); - if (p && p->scope == level) - error("redeclaration of `%s'\n", id); - p = install(id, &identifiers, level, - level < LOCAL ? PERM : FUNC); - p->type = ty1; - p->sclass = TYPEDEF; - p->src = pos; - } - else - (void)(*dcl)(sclass, id, ty1, &pos); - if (t != ',') - break; - t = gettok(); - id = NULL; - pos = src; - ty1 = dclr(ty, &id, NULL, 0); - } - } else if (ty == NULL - || !(isenum(ty) || - (isstruct(ty) && (*unqual(ty)->u.sym->name < '1' || *unqual(ty)->u.sym->name > '9')))) - error("empty declaration\n"); - test(';', stop); -} -static Symbol dclglobal(int sclass, char *id, Type ty, Coordinate *pos) { - Symbol p; - - if (sclass == 0) - sclass = AUTO; - else if (sclass != EXTERN && sclass != STATIC) { - error("invalid storage class `%k' for `%t %s'\n", - sclass, ty, id); - sclass = AUTO; - } - p = lookup(id, identifiers); - if (p && p->scope == GLOBAL) { - if (p->sclass != TYPEDEF && eqtype(ty, p->type, 1)) - ty = compose(ty, p->type); - else - error("redeclaration of `%s' previously declared at %w\n", p->name, &p->src); - - if (!isfunc(ty) && p->defined && t == '=') - error("redefinition of `%s' previously defined at %w\n", p->name, &p->src); - - if ((p->sclass == EXTERN && sclass == STATIC) - || (p->sclass == STATIC && sclass == AUTO) - || (p->sclass == AUTO && sclass == STATIC)) - warning("inconsistent linkage for `%s' previously declared at %w\n", p->name, &p->src); - - } - if (p == NULL || p->scope != GLOBAL) { - Symbol q = lookup(id, externals); - if (q) { - if (sclass == STATIC || !eqtype(ty, q->type, 1)) - warning("declaration of `%s' does not match previous declaration at %w\n", id, &q->src); - - p = relocate(id, externals, globals); - p->sclass = sclass; - } else { - p = install(id, &globals, GLOBAL, PERM); - p->sclass = sclass; - (*IR->defsymbol)(p); - } - if (p->sclass != STATIC) { - static int nglobals; - nglobals++; - if (Aflag >= 2 && nglobals == 512) - warning("more than 511 external identifiers\n"); - } - } else if (p->sclass == EXTERN) - p->sclass = sclass; - p->type = ty; - p->src = *pos; - if (t == '=' && isfunc(p->type)) { - error("illegal initialization for `%s'\n", p->name); - t = gettok(); - initializer(p->type, 0); - } else if (t == '=') { - initglobal(p, 0); - if (glevel > 0 && IR->stabsym) { - (*IR->stabsym)(p); swtoseg(p->u.seg); } - } else if (p->sclass == STATIC && !isfunc(p->type) - && p->type->size == 0) - error("undefined size for `%t %s'\n", p->type, p->name); - return p; -} -static void initglobal(Symbol p, int flag) { - Type ty; - - if (t == '=' || flag) { - if (p->sclass == STATIC) { - for (ty = p->type; isarray(ty); ty = ty->type) - ; - defglobal(p, isconst(ty) ? LIT : DATA); - } else - defglobal(p, DATA); - if (t == '=') - t = gettok(); - ty = initializer(p->type, 0); - if (isarray(p->type) && p->type->size == 0) - p->type = ty; - if (p->sclass == EXTERN) - p->sclass = AUTO; - } -} -void defglobal(Symbol p, int seg) { - p->u.seg = seg; - swtoseg(p->u.seg); - if (p->sclass != STATIC) - (*IR->export)(p); - (*IR->global)(p); - p->defined = 1; -} - -static Type dclr(Type basety, char **id, Symbol **params, int abstract) { - Type ty = dclr1(id, params, abstract); - - for ( ; ty; ty = ty->type) - switch (ty->op) { - case POINTER: - basety = ptr(basety); - break; - case FUNCTION: - basety = func(basety, ty->u.f.proto, - ty->u.f.oldstyle); - break; - case ARRAY: - basety = array(basety, ty->size, 0); - break; - case CONST: case VOLATILE: - basety = qual(ty->op, basety); - break; - default: assert(0); - } - if (Aflag >= 2 && basety->size > 32767) - warning("more than 32767 bytes in `%t'\n", basety); - return basety; -} -static Type tnode(int op, Type type) { - Type ty; - - NEW0(ty, STMT); - ty->op = op; - ty->type = type; - return ty; -} -static Type dclr1(char **id, Symbol **params, int abstract) { - Type ty = NULL; - - switch (t) { - case ID: if (id) - *id = token; - else - error("extraneous identifier `%s'\n", token); - t = gettok(); break; - case '*': t = gettok(); if (t == CONST || t == VOLATILE) { - Type ty1; - ty1 = ty = tnode(t, NULL); - while ((t = gettok()) == CONST || t == VOLATILE) - ty1 = tnode(t, ty1); - ty->type = dclr1(id, params, abstract); - ty = ty1; - } else - ty = dclr1(id, params, abstract); - ty = tnode(POINTER, ty); break; - case '(': t = gettok(); if (abstract - && (t == REGISTER || istypename(t, tsym) || t == ')')) { - Symbol *args; - ty = tnode(FUNCTION, ty); - enterscope(); - if (level > PARAM) - enterscope(); - args = parameters(ty); - exitparams(args); - } else { - ty = dclr1(id, params, abstract); - expect(')'); - if (abstract && ty == NULL - && (id == NULL || *id == NULL)) - return tnode(FUNCTION, NULL); - } break; - case '[': break; - default: return ty; - } - while (t == '(' || t == '[') - switch (t) { - case '(': t = gettok(); { Symbol *args; - ty = tnode(FUNCTION, ty); - enterscope(); - if (level > PARAM) - enterscope(); - args = parameters(ty); - if (params && *params == NULL) - *params = args; - else - exitparams(args); - } - break; - case '[': t = gettok(); { int n = 0; - if (kind[t] == ID) { - n = intexpr(']', 1); - if (n <= 0) { - error("`%d' is an illegal array size\n", n); - n = 1; - } - } else - expect(']'); - ty = tnode(ARRAY, ty); - ty->size = n; } break; - default: assert(0); - } - return ty; -} -static Symbol *parameters(Type fty) { - List list = NULL; - Symbol *params; - - if (kind[t] == STATIC || istypename(t, tsym)) { - int n = 0; - Type ty1 = NULL; - for (;;) { - Type ty; - int sclass = 0; - char *id = NULL; - if (ty1 && t == ELLIPSIS) { - static struct symbol sentinel; - if (sentinel.type == NULL) { - sentinel.type = voidtype; - sentinel.defined = 1; - } - if (ty1 == voidtype) - error("illegal formal parameter types\n"); - list = append(&sentinel, list); - t = gettok(); - break; - } - if (!istypename(t, tsym) && t != REGISTER) - error("missing parameter type\n"); - n++; - ty = dclr(specifier(&sclass), &id, NULL, 1); - if ( (ty == voidtype && (ty1 || id)) - || ty1 == voidtype) - error("illegal formal parameter types\n"); - if (id == NULL) - id = stringd(n); - if (ty != voidtype) - list = append(dclparam(sclass, id, ty, &src), list); - if (Aflag >= 1 && !hasproto(ty)) - warning("missing prototype\n"); - if (ty1 == NULL) - ty1 = ty; - if (t != ',') - break; - t = gettok(); - } - fty->u.f.proto = newarray(length(list) + 1, - sizeof (Type *), PERM); - params = ltov(&list, FUNC); - for (n = 0; params[n]; n++) - fty->u.f.proto[n] = params[n]->type; - fty->u.f.proto[n] = NULL; - fty->u.f.oldstyle = 0; - } else { - if (t == ID) - for (;;) { - Symbol p; - if (t != ID) { - error("expecting an identifier\n"); - break; - } - p = dclparam(0, token, inttype, &src); - p->defined = 0; - list = append(p, list); - t = gettok(); - if (t != ',') - break; - t = gettok(); - } - params = ltov(&list, FUNC); - fty->u.f.proto = NULL; - fty->u.f.oldstyle = 1; - } - if (t != ')') { - static char stop[] = { CHAR, STATIC, IF, ')', 0 }; - expect(')'); - skipto('{', stop); - } - if (t == ')') - t = gettok(); - return params; -} -static void exitparams(Symbol params[]) { - assert(params); - if (params[0] && !params[0]->defined) - error("extraneous old-style parameter list\n"); - if (level > PARAM) - exitscope(); - exitscope(); -} - -static Symbol dclparam(int sclass, char *id, Type ty, Coordinate *pos) { - Symbol p; - - if (isfunc(ty)) - ty = ptr(ty); - else if (isarray(ty)) - ty = atop(ty); - if (sclass == 0) - sclass = AUTO; - else if (sclass != REGISTER) { - error("invalid storage class `%k' for `%t%s\n", - sclass, ty, stringf(id ? " %s'" : "' parameter", id)); - sclass = AUTO; - } else if (isvolatile(ty) || isstruct(ty)) { - warning("register declaration ignored for `%t%s\n", - ty, stringf(id ? " %s'" : "' parameter", id)); - sclass = AUTO; - } - - p = lookup(id, identifiers); - if (p && p->scope == level) - error("duplicate declaration for `%s' previously declared at %w\n", id, &p->src); - - else - p = install(id, &identifiers, level, FUNC); - p->sclass = sclass; - p->src = *pos; - p->type = ty; - p->defined = 1; - if (t == '=') { - error("illegal initialization for parameter `%s'\n", id); - t = gettok(); - (void)expr1(0); - } - return p; -} -static Type structdcl(int op) { - char *tag; - Type ty; - Symbol p; - Coordinate pos; - - t = gettok(); - pos = src; - if (t == ID) { - tag = token; - t = gettok(); - } else - tag = ""; - if (t == '{') { - static char stop[] = { IF, ',', 0 }; - ty = newstruct(op, tag); - ty->u.sym->src = pos; - ty->u.sym->defined = 1; - t = gettok(); - if (istypename(t, tsym)) - fields(ty); - else - error("invalid %k field declarations\n", op); - test('}', stop); - } - else if (*tag && (p = lookup(tag, types)) != NULL - && p->type->op == op) { - ty = p->type; - if (t == ';' && p->scope < level) - ty = newstruct(op, tag); - } - else { - if (*tag == 0) - error("missing %k tag\n", op); - ty = newstruct(op, tag); - } - if (*tag && xref) - use(ty->u.sym, pos); - return ty; -} -static void fields(Type ty) { - { int n = 0; - while (istypename(t, tsym)) { - static char stop[] = { IF, CHAR, '}', 0 }; - Type ty1 = specifier(NULL); - for (;;) { - Field p; - char *id = NULL; - Type fty = dclr(ty1, &id, NULL, 0); - p = newfield(id, ty, fty); - if (Aflag >= 1 && !hasproto(p->type)) - warning("missing prototype\n"); - if (t == ':') { - if (unqual(p->type) != inttype - && unqual(p->type) != unsignedtype) { - error("`%t' is an illegal bit-field type\n", - p->type); - p->type = inttype; - } - t = gettok(); - p->bitsize = intexpr(0, 0); - if (p->bitsize > 8*inttype->size || p->bitsize < 0) { - error("`%d' is an illegal bit-field size\n", - p->bitsize); - p->bitsize = 8*inttype->size; - } else if (p->bitsize == 0 && id) { - warning("extraneous 0-width bit field `%t %s' ignored\n", p->type, id); - - p->name = stringd(genlabel(1)); - } - p->lsb = 1; - } - else { - if (id == NULL) - error("field name missing\n"); - else if (isfunc(p->type)) - error("`%t' is an illegal field type\n", p->type); - else if (p->type->size == 0) - error("undefined size for field `%t %s'\n", - p->type, id); - } - if (isconst(p->type)) - ty->u.sym->u.s.cfields = 1; - if (isvolatile(p->type)) - ty->u.sym->u.s.vfields = 1; - n++; - if (Aflag >= 2 && n == 128) - warning("more than 127 fields in `%t'\n", ty); - if (t != ',') - break; - t = gettok(); - } - test(';', stop); - } } - { int bits = 0, off = 0, overflow = 0; - Field p, *q = &ty->u.sym->u.s.flist; - ty->align = IR->structmetric.align; - for (p = *q; p; p = p->link) { - int a = p->type->align ? p->type->align : 1; - if (p->lsb) - a = unsignedtype->align; - if (ty->op == UNION) - off = bits = 0; - else if (p->bitsize == 0 || bits == 0 - || bits - 1 + p->bitsize > 8*unsignedtype->size) { - off = add(off, bits2bytes(bits-1)); - bits = 0; - chkoverflow(off, a - 1); - off = roundup(off, a); - } - if (a > ty->align) - ty->align = a; - p->offset = off; - - if (p->lsb) { - if (bits == 0) - bits = 1; - if (IR->little_endian) - p->lsb = bits; - else - p->lsb = 8*unsignedtype->size - bits + 1 - - p->bitsize + 1; - bits += p->bitsize; - } else - off = add(off, p->type->size); - if (off + bits2bytes(bits-1) > ty->size) - ty->size = off + bits2bytes(bits-1); - if (p->name == NULL - || !('1' <= *p->name && *p->name <= '9')) { - *q = p; - q = &p->link; - } - } - *q = NULL; - chkoverflow(ty->size, ty->align - 1); - ty->size = roundup(ty->size, ty->align); - if (overflow) { - error("size of `%t' exceeds %d bytes\n", ty, inttype->u.sym->u.limits.max.i); - ty->size = inttype->u.sym->u.limits.max.i&(~(ty->align - 1)); - } } -} -static void funcdefn(int sclass, char *id, Type ty, Symbol params[], Coordinate pt) { - int i, n; - Symbol *callee, *caller, p; - Type rty = freturn(ty); - - if (isstruct(rty) && rty->size == 0) - error("illegal use of incomplete type `%t'\n", rty); - for (n = 0; params[n]; n++) - ; - if (n > 0 && params[n-1]->name == NULL) - params[--n] = NULL; - if (Aflag >= 2 && n > 31) - warning("more than 31 parameters in function `%s'\n", id); - if (ty->u.f.oldstyle) { - if (Aflag >= 1) - warning("old-style function definition for `%s'\n", id); - caller = params; - callee = newarray(n + 1, sizeof *callee, FUNC); - memcpy(callee, caller, (n+1)*sizeof *callee); - enterscope(); - assert(level == PARAM); - while (kind[t] == STATIC || istypename(t, tsym)) - decl(dclparam); - foreach(identifiers, PARAM, oldparam, callee); - - for (i = 0; (p = callee[i]) != NULL; i++) { - if (!p->defined) - callee[i] = dclparam(0, p->name, inttype, &p->src); - *caller[i] = *p; - caller[i]->sclass = AUTO; - caller[i]->type = promote(p->type); - } - p = lookup(id, identifiers); - if (p && p->scope == GLOBAL && isfunc(p->type) - && p->type->u.f.proto) { - Type *proto = p->type->u.f.proto; - for (i = 0; caller[i] && proto[i]; i++) { - Type ty = unqual(proto[i]); - if (eqtype(isenum(ty) ? ty->type : ty, - unqual(caller[i]->type), 1) == 0) - break; - else if (isenum(ty) && !isenum(unqual(caller[i]->type))) - warning("compatibility of `%t' and `%t' is compiler dependent\n", - proto[i], caller[i]->type); - } - if (proto[i] || caller[i]) - error("conflicting argument declarations for function `%s'\n", id); - - } - else { - Type *proto = newarray(n + 1, sizeof *proto, PERM); - if (Aflag >= 1) - warning("missing prototype for `%s'\n", id); - for (i = 0; i < n; i++) - proto[i] = caller[i]->type; - proto[i] = NULL; - ty = func(rty, proto, 1); - } - } else { - callee = params; - caller = newarray(n + 1, sizeof *caller, FUNC); - for (i = 0; (p = callee[i]) != NULL && p->name; i++) { - NEW(caller[i], FUNC); - *caller[i] = *p; - if (isint(p->type)) - caller[i]->type = promote(p->type); - caller[i]->sclass = AUTO; - if ('1' <= *p->name && *p->name <= '9') - error("missing name for parameter %d to function `%s'\n", i + 1, id); - - } - caller[i] = NULL; - } - for (i = 0; (p = callee[i]) != NULL; i++) - if (p->type->size == 0) { - error("undefined size for parameter `%t %s'\n", - p->type, p->name); - caller[i]->type = p->type = inttype; - } - if (Aflag >= 2 && sclass != STATIC && strcmp(id, "main") == 0) { - if (ty->u.f.oldstyle) - warning("`%t %s()' is a non-ANSI definition\n", rty, id); - else if (!(rty == inttype - && ((n == 0 && callee[0] == NULL) - || (n == 2 && callee[0]->type == inttype - && isptr(callee[1]->type) && callee[1]->type->type == charptype - && !variadic(ty))))) - warning("`%s' is a non-ANSI definition\n", typestring(ty, id)); - } - p = lookup(id, identifiers); - if (p && isfunc(p->type) && p->defined) - error("redefinition of `%s' previously defined at %w\n", - p->name, &p->src); - cfunc = dclglobal(sclass, id, ty, &pt); - cfunc->u.f.label = genlabel(1); - cfunc->u.f.callee = callee; - cfunc->u.f.pt = src; - cfunc->defined = 1; - if (xref) - use(cfunc, cfunc->src); - if (Pflag) - printproto(cfunc, cfunc->u.f.callee); - if (ncalled >= 0) - ncalled = findfunc(cfunc->name, pt.file); - labels = table(NULL, LABELS); - stmtlabs = table(NULL, LABELS); - refinc = 1.0; - regcount = 0; - codelist = &codehead; - codelist->next = NULL; - if (!IR->wants_callb && isstruct(rty)) - retv = genident(AUTO, ptr(rty), PARAM); - compound(0, NULL, 0); - - { - Code cp; - for (cp = codelist; cp->kind < Label; cp = cp->prev) - ; - if (cp->kind != Jump) { - if (rty != voidtype) { - warning("missing return value\n"); - retcode(cnsttree(inttype, 0L)); - } else - retcode(NULL); - } - } - definelab(cfunc->u.f.label); - if (events.exit) - apply(events.exit, cfunc, NULL); - walk(NULL, 0, 0); - exitscope(); - assert(level == PARAM); - foreach(identifiers, level, checkref, NULL); - if (!IR->wants_callb && isstruct(rty)) { - Symbol *a; - a = newarray(n + 2, sizeof *a, FUNC); - a[0] = retv; - memcpy(&a[1], callee, (n+1)*sizeof *callee); - callee = a; - a = newarray(n + 2, sizeof *a, FUNC); - NEW(a[0], FUNC); - *a[0] = *retv; - memcpy(&a[1], caller, (n+1)*sizeof *callee); - caller = a; - } - if (!IR->wants_argb) - for (i = 0; caller[i]; i++) - if (isstruct(caller[i]->type)) { - caller[i]->type = ptr(caller[i]->type); - callee[i]->type = ptr(callee[i]->type); - caller[i]->structarg = callee[i]->structarg = 1; - } - if (glevel > 1) for (i = 0; callee[i]; i++) callee[i]->sclass = AUTO; - if (cfunc->sclass != STATIC) - (*IR->export)(cfunc); - if (glevel && IR->stabsym) { - swtoseg(CODE); (*IR->stabsym)(cfunc); } - swtoseg(CODE); - (*IR->function)(cfunc, caller, callee, cfunc->u.f.ncalls); - if (glevel && IR->stabfend) - (*IR->stabfend)(cfunc, lineno); - foreach(stmtlabs, LABELS, checklab, NULL); - exitscope(); - expect('}'); - labels = stmtlabs = NULL; - retv = NULL; - cfunc = NULL; -} -static void oldparam(Symbol p, void *cl) { - int i; - Symbol *callee = cl; - - for (i = 0; callee[i]; i++) - if (p->name == callee[i]->name) { - callee[i] = p; - return; - } - error("declared parameter `%s' is missing\n", p->name); -} -void compound(int loop, struct swtch *swp, int lev) { - Code cp; - int nregs; - - walk(NULL, 0, 0); - cp = code(Blockbeg); - enterscope(); - assert(level >= LOCAL); - if (level == LOCAL && events.entry) - apply(events.entry, cfunc, NULL); - definept(NULL); - expect('{'); - autos = registers = NULL; - if (level == LOCAL && IR->wants_callb - && isstruct(freturn(cfunc->type))) { - retv = genident(AUTO, ptr(freturn(cfunc->type)), level); - retv->defined = 1; - retv->ref = 1; - registers = append(retv, registers); - } - while (kind[t] == CHAR || kind[t] == STATIC - || (istypename(t, tsym) && getchr() != ':')) - decl(dcllocal); - { - int i; - Symbol *a = ltov(&autos, STMT); - nregs = length(registers); - for (i = 0; a[i]; i++) - registers = append(a[i], registers); - cp->u.block.locals = ltov(®isters, FUNC); - } - if (events.blockentry) - apply(events.blockentry, cp->u.block.locals, NULL); - while (kind[t] == IF || kind[t] == ID) - statement(loop, swp, lev); - walk(NULL, 0, 0); - foreach(identifiers, level, checkref, NULL); - { - int i = nregs, j; - Symbol p; - for ( ; (p = cp->u.block.locals[i]) != NULL; i++) { - for (j = i; j > nregs - && cp->u.block.locals[j-1]->ref < p->ref; j--) - cp->u.block.locals[j] = cp->u.block.locals[j-1]; - cp->u.block.locals[j] = p; - } - } - if (events.blockexit) - apply(events.blockexit, cp->u.block.locals, NULL); - cp->u.block.level = level; - cp->u.block.identifiers = identifiers; - cp->u.block.types = types; - code(Blockend)->u.begin = cp; - if (reachable(Gen)) - definept(NULL); - if (level > LOCAL) { - exitscope(); - expect('}'); - } -} -static void checkref(Symbol p, void *cl) { - if (p->scope >= PARAM - && (isvolatile(p->type) || isfunc(p->type))) - p->addressed = 1; - if (Aflag >= 2 && p->defined && p->ref == 0) { - if (p->sclass == STATIC) - warning("static `%t %s' is not referenced\n", - p->type, p->name); - else if (p->scope == PARAM) - warning("parameter `%t %s' is not referenced\n", - p->type, p->name); - else if (p->scope >= LOCAL && p->sclass != EXTERN) - warning("local `%t %s' is not referenced\n", - p->type, p->name); - } - if (p->sclass == AUTO - && ((p->scope == PARAM && regcount == 0) - || p->scope >= LOCAL) - && !p->addressed && isscalar(p->type) && p->ref >= 3.0) - p->sclass = REGISTER; - if (level == GLOBAL && p->sclass == STATIC && !p->defined - && isfunc(p->type) && p->ref) - error("undefined static `%t %s'\n", p->type, p->name); - assert(!(level == GLOBAL && p->sclass == STATIC && !p->defined && !isfunc(p->type))); -} -static Symbol dcllocal(int sclass, char *id, Type ty, Coordinate *pos) { - Symbol p, q; - - if (sclass == 0) - sclass = isfunc(ty) ? EXTERN : AUTO; - else if (isfunc(ty) && sclass != EXTERN) { - error("invalid storage class `%k' for `%t %s'\n", - sclass, ty, id); - sclass = EXTERN; - } else if (sclass == REGISTER - && (isvolatile(ty) || isstruct(ty) || isarray(ty))) { - warning("register declaration ignored for `%t %s'\n", - ty, id); - sclass = AUTO; - } - q = lookup(id, identifiers); - if ((q && q->scope >= level) - || (q && q->scope == PARAM && level == LOCAL)) { - if (sclass == EXTERN && q->sclass == EXTERN - && eqtype(q->type, ty, 1)) - ty = compose(ty, q->type); - else - error("redeclaration of `%s' previously declared at %w\n", q->name, &q->src); - } - - assert(level >= LOCAL); - p = install(id, &identifiers, level, sclass == STATIC || sclass == EXTERN ? PERM : FUNC); - p->type = ty; - p->sclass = sclass; - p->src = *pos; - switch (sclass) { - case EXTERN: q = lookup(id, globals); - if (q == NULL || q->sclass == TYPEDEF || q->sclass == ENUM) { - q = lookup(id, externals); - if (q == NULL) { - q = install(p->name, &externals, GLOBAL, PERM); - q->type = p->type; - q->sclass = EXTERN; - q->src = src; - (*IR->defsymbol)(q); - } - } - if (!eqtype(p->type, q->type, 1)) - warning("declaration of `%s' does not match previous declaration at %w\n", q->name, &q->src); - - p->u.alias = q; break; - case STATIC: (*IR->defsymbol)(p); - initglobal(p, 0); - if (!p->defined) { - if (p->type->size > 0) { - defglobal(p, BSS); - (*IR->space)(p->type->size); - } else - error("undefined size for `%t %s'\n", - p->type, p->name); - } - p->defined = 1; break; - case REGISTER: registers = append(p, registers); - regcount++; - p->defined = 1; - break; - case AUTO: autos = append(p, autos); - p->defined = 1; break; - default: assert(0); - } - if (t == '=') { - Tree e; - if (sclass == EXTERN) - error("illegal initialization of `extern %s'\n", id); - t = gettok(); - definept(NULL); - if (isscalar(p->type) - || (isstruct(p->type) && t != '{')) { - if (t == '{') { - t = gettok(); - e = expr1(0); - expect('}'); - } else - e = expr1(0); - } else { - Symbol t1; - Type ty = p->type, ty1 = ty; - while (isarray(ty1)) - ty1 = ty1->type; - if (!isconst(ty) && (!isarray(ty) || !isconst(ty1))) - ty = qual(CONST, ty); - t1 = genident(STATIC, ty, GLOBAL); - initglobal(t1, 1); - if (isarray(p->type) && p->type->size == 0 - && t1->type->size > 0) - p->type = array(p->type->type, - t1->type->size/t1->type->type->size, 0); - e = idtree(t1); - } - walk(root(asgn(p, e)), 0, 0); - p->ref = 1; - } - if (!isfunc(p->type) && p->defined && p->type->size <= 0) - error("undefined size for `%t %s'\n", p->type, id); - return p; -} -void finalize(void) { - foreach(externals, GLOBAL, doextern, NULL); - foreach(identifiers, GLOBAL, doglobal, NULL); - foreach(identifiers, GLOBAL, checkref, NULL); - foreach(constants, CONSTANTS, doconst, NULL); -} -static void doextern(Symbol p, void *cl) { - (*IR->import)(p); -} -static void doglobal(Symbol p, void *cl) { - if (!p->defined && (p->sclass == EXTERN - || (isfunc(p->type) && p->sclass == AUTO))) - (*IR->import)(p); - else if (!p->defined && !isfunc(p->type) - && (p->sclass == AUTO || p->sclass == STATIC)) { - if (isarray(p->type) - && p->type->size == 0 && p->type->type->size > 0) - p->type = array(p->type->type, 1, 0); - if (p->type->size > 0) { - defglobal(p, BSS); - (*IR->space)(p->type->size); - if (glevel > 0 && IR->stabsym) - (*IR->stabsym)(p); - } else - error("undefined size for `%t %s'\n", - p->type, p->name); - p->defined = 1; - } - if (Pflag - && !isfunc(p->type) - && !p->generated && p->sclass != EXTERN) - printdecl(p, p->type); -} -void doconst(Symbol p, void *cl) { - if (p->u.c.loc) { - assert(p->u.c.loc->u.seg == 0); - defglobal(p->u.c.loc, LIT); - if (isarray(p->type) && p->type->type == widechar) { - unsigned int *s = p->u.c.v.p; - int n = p->type->size/widechar->size; - while (n-- > 0) { - Value v; - v.u = *s++; - (*IR->defconst)(widechar->op, widechar->size, v); - } - } else if (isarray(p->type)) - (*IR->defstring)(p->type->size, p->u.c.v.p); - else - (*IR->defconst)(p->type->op, p->type->size, p->u.c.v); - p->u.c.loc = NULL; - } -} -void checklab(Symbol p, void *cl) { - if (!p->defined) - error("undefined label `%s'\n", p->name); - p->defined = 1; -} - -Type enumdcl(void) { - char *tag; - Type ty; - Symbol p = {0}; - Coordinate pos; - - t = gettok(); - pos = src; - if (t == ID) { - tag = token; - t = gettok(); - } else - tag = ""; - if (t == '{') { - static char follow[] = { IF, 0 }; - int n = 0; - long k = -1; - List idlist = 0; - ty = newstruct(ENUM, tag); - t = gettok(); - if (t != ID) - error("expecting an enumerator identifier\n"); - while (t == ID) { - char *id = token; - Coordinate s; - if (tsym && tsym->scope == level) - error("redeclaration of `%s' previously declared at %w\n", - token, &tsym->src); - s = src; - t = gettok(); - if (t == '=') { - t = gettok(); - k = intexpr(0, 0); - } else { - if (k == inttype->u.sym->u.limits.max.i) - error("overflow in value for enumeration constant `%s'\n", id); - k++; - } - p = install(id, &identifiers, level, level < LOCAL ? PERM : FUNC); - p->src = s; - p->type = ty; - p->sclass = ENUM; - p->u.value = k; - idlist = append(p, idlist); - n++; - if (Aflag >= 2 && n == 128) - warning("more than 127 enumeration constants in `%t'\n", ty); - if (t != ',') - break; - t = gettok(); - if (Aflag >= 2 && t == '}') - warning("non-ANSI trailing comma in enumerator list\n"); - } - test('}', follow); - ty->type = inttype; - ty->size = ty->type->size; - ty->align = ty->type->align; - ty->u.sym->u.idlist = ltov(&idlist, PERM); - ty->u.sym->defined = 1; - } else if ((p = lookup(tag, types)) != NULL && p->type->op == ENUM) { - ty = p->type; - if (t == ';') - error("empty declaration\n"); - } else { - error("unknown enumeration `%s'\n", tag); - ty = newstruct(ENUM, tag); - ty->type = inttype; - } - if (*tag && xref) - use(p, pos); - return ty; -} - -Type typename(void) { - Type ty = specifier(NULL); - - if (t == '*' || t == '(' || t == '[') { - ty = dclr(ty, NULL, NULL, 1); - if (Aflag >= 1 && !hasproto(ty)) - warning("missing prototype\n"); - } - return ty; -} - -- cgit v1.2.3