/* */
/* */
/* */
-/* (C) 2000-2003 Ullrich von Bassewitz */
+/* (C) 2000-2004 Ullrich von Bassewitz */
/* Römerstrasse 52 */
/* D-70794 Filderstadt */
/* EMail: uz@cc65.org */
#include "expr.h"
#include "function.h"
#include "global.h"
-#include "symtab.h"
+#include "loadexpr.h"
#include "locals.h"
+#include "stackptr.h"
+#include "standard.h"
+#include "symtab.h"
+#include "typeconv.h"
* symbol data, which is the offset of the variable in the register bank.
*/
{
- unsigned Flags;
unsigned InitLabel;
/* Determine if this is a compound variable */
/* Check for an optional initialization */
if (CurTok.Tok == TOK_ASSIGN) {
- ExprDesc lval;
+ ExprDesc Expr;
/* Skip the '=' */
NextToken ();
/* Parse the initialization generating a memory image of the
* data in the RODATA segment. The function does return the size
- * of the initialization data, which may be greater than the
- * actual size of the type, if the type is a structure with a
+ * of the initialization data, which may be greater than the
+ * actual size of the type, if the type is a structure with a
* flexible array member that has been initialized. Since we must
* know the size of the data in advance for register variables,
* we cannot allow that here.
} else {
- /* Setup the type flags for the assignment */
- Flags = CF_NONE;
- if (Size == SIZEOF_CHAR) {
- Flags |= CF_FORCECHAR;
- }
+ /* Parse the expression */
+ hie1 (&Expr);
- /* Get the expression into the primary */
- if (evalexpr (Flags, hie1, &lval) == 0) {
- /* Constant expression. Adjust the types */
- assignadjust (Decl->Type, &lval);
- Flags |= CF_CONST;
- /* Load it into the primary */
- exprhs (Flags, 0, &lval);
- } else {
- /* Expression is not constant and in the primary */
- assignadjust (Decl->Type, &lval);
- }
+ /* Convert it to the target type */
+ TypeConversion (&Expr, Decl->Type);
+
+ /* Load the value into the primary */
+ LoadExpr (CF_NONE, &Expr);
/* Store the value into the variable */
- Flags |= CF_REGVAR;
- g_putstatic (Flags | TypeOf (Decl->Type), Reg, 0);
+ g_putstatic (CF_REGVAR | TypeOf (Decl->Type), Reg, 0);
}
unsigned Size = SizeOf (Decl->Type);
/* Check if this is a variable on the stack or in static memory */
- if (StaticLocals == 0) {
+ if (IS_Get (&StaticLocals) == 0) {
/* Check for an optional initialization */
if (CurTok.Tok == TOK_ASSIGN) {
- ExprDesc lval;
+ ExprDesc Expr;
/* Skip the '=' */
NextToken ();
/* Setup the type flags for the assignment */
Flags = (Size == SIZEOF_CHAR)? CF_FORCECHAR : CF_NONE;
- /* Get the expression into the primary */
- if (evalexpr (Flags, hie1, &lval) == 0) {
- /* Constant expression. Adjust the types */
- assignadjust (Decl->Type, &lval);
+ /* Parse the expression */
+ hie1 (&Expr);
+
+ /* Convert it to the target type */
+ TypeConversion (&Expr, Decl->Type);
+
+ /* If the value is not const, load it into the primary.
+ * Otherwise pass the information to the code generator.
+ */
+ if (ED_IsConstAbsInt (&Expr)) {
Flags |= CF_CONST;
} else {
- /* Expression is not constant and in the primary */
- assignadjust (Decl->Type, &lval);
+ LoadExpr (CF_NONE, &Expr);
+ ED_MakeRVal (&Expr);
}
/* Push the value */
- g_push (Flags | TypeOf (Decl->Type), lval.ConstVal);
+ g_push (Flags | TypeOf (Decl->Type), Expr.IVal);
}
*SC |= SC_REF;
/* Variable is located at the current SP */
- SymData = oursp;
+ SymData = StackPtr;
} else {
/* Non-initialized local variable. Just keep track of
/* Allow assignments */
if (CurTok.Tok == TOK_ASSIGN) {
- ExprDesc lval;
+ ExprDesc Expr;
/* Skip the '=' */
NextToken ();
} else {
- /* Setup the type flags for the assignment */
- Flags = (Size == SIZEOF_CHAR)? CF_FORCECHAR : CF_NONE;
+ /* Parse the expression */
+ hie1 (&Expr);
- /* Get the expression into the primary */
- if (evalexpr (Flags, hie1, &lval) == 0) {
- /* Constant expression. Adjust the types */
- assignadjust (Decl->Type, &lval);
- Flags |= CF_CONST;
- /* Load it into the primary */
- exprhs (Flags, 0, &lval);
- } else {
- /* Expression is not constant and in the primary */
- assignadjust (Decl->Type, &lval);
- }
+ /* Convert it to the target type */
+ TypeConversion (&Expr, Decl->Type);
- /* Store the value into the variable */
- g_putstatic (Flags | TypeOf (Decl->Type), SymData, 0);
+ /* Load the value into the primary */
+ LoadExpr (CF_NONE, &Expr);
+ /* Store the value into the variable */
+ g_putstatic (TypeOf (Decl->Type), SymData, 0);
}
/* Mark the variable as referenced */
static void ParseOneDecl (const DeclSpec* Spec)
/* Parse one variable declaration */
{
- unsigned SC; /* Storage class for symbol */
+ unsigned SC; /* Storage class for symbol */
unsigned SymData = 0; /* Symbol data (offset, label name, ...) */
Declaration Decl; /* Declaration data structure */
} else if ((SC & SC_AUTO) == SC_AUTO) {
/* Auto variable */
SymData = ParseAutoDecl (&Decl, &SC);
+ } else if ((SC & SC_EXTERN) == SC_EXTERN) {
+ /* External identifier - may not get initialized */
+ if (CurTok.Tok == TOK_ASSIGN) {
+ Error ("Cannot initialize externals");
+ }
+ SymData = 0;
} else if ((SC & SC_STATIC) == SC_STATIC) {
/* Static variable */
SymData = ParseStaticDecl (&Decl, &SC);
} else {
Internal ("Invalid storage class in ParseOneDecl: %04X", SC);
}
+
+ /* If the standard was not set explicitly to C89, print a warning
+ * for variables with implicit int type.
+ */
+ if ((Spec->Flags & DS_DEF_TYPE) != 0 && IS_Get (&Standard) >= STD_C99) {
+ Warning ("Implicit `int' is an obsolete feature");
+ }
}
/* If the symbol is not marked as external, it will be defined now */
AddLocalSym (Decl.Ident, Decl.Type, SC, SymData);
}
-
+
void DeclareLocals (void)
/* Declare local variables and types. */
{
/* Remember the current stack pointer */
- int InitialStack = oursp;
+ int InitialStack = StackPtr;
/* Loop until we don't find any more variables */
while (1) {
- /* Check variable declarations. We need to distinguish between a
- * default int type and the end of variable declarations. So we
- * will do the following: If there is no explicit storage class
- * specifier *and* no explicit type given, *and* no type qualifiers
+ /* Check variable declarations. We need to distinguish between a
+ * default int type and the end of variable declarations. So we
+ * will do the following: If there is no explicit storage class
+ * specifier *and* no explicit type given, *and* no type qualifiers
* have been read, it is assumed that we have reached the end of
* declarations.
- */
- DeclSpec Spec;
- ParseDeclSpec (&Spec, SC_AUTO, T_INT);
+ */
+ DeclSpec Spec;
+ ParseDeclSpec (&Spec, SC_AUTO, T_INT);
if ((Spec.Flags & DS_DEF_STORAGE) != 0 && /* No storage spec */
(Spec.Flags & DS_DEF_TYPE) != 0 && /* No type given */
GetQualifier (Spec.Type) == T_QUAL_NONE) { /* No type qualifier */
- break;
- }
+ break;
+ }
- /* Accept type only declarations */
- if (CurTok.Tok == TOK_SEMI) {
- /* Type declaration only */
- CheckEmptyDecl (&Spec);
- NextToken ();
- continue;
- }
+ /* Accept type only declarations */
+ if (CurTok.Tok == TOK_SEMI) {
+ /* Type declaration only */
+ CheckEmptyDecl (&Spec);
+ NextToken ();
+ continue;
+ }
/* Parse a comma separated variable list */
while (1) {
- /* Parse one declaration */
- ParseOneDecl (&Spec);
+ /* Parse one declaration */
+ ParseOneDecl (&Spec);
- /* Check if there is more */
+ /* Check if there is more */
if (CurTok.Tok == TOK_COMMA) {
- /* More to come */
+ /* More to come */
NextToken ();
} else {
/* Done */
/* In case we've allocated local variables in this block, emit a call to
* the stack checking routine if stack checks are enabled.
*/
- if (CheckStack && InitialStack != oursp) {
+ if (IS_Get (&CheckStack) && InitialStack != StackPtr) {
g_cstackcheck ();
}
}
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