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Emit warnings for symbols that were used suboptimal because of forward

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definitions. For example a zero page symbol that is used as absolute because
it was undefined when encountered.


git-svn-id: svn://svn.cc65.org/cc65/trunk@3724 b7a2c559-68d2-44c3-8de9-860c34a00d81
This commit is contained in:
cuz
2006-04-09 10:56:23 +00:00
parent 44405a0bb5
commit c13f40a9f1
6 changed files with 151 additions and 34 deletions
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49
src/ca65/symentry.c
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@@ -6,7 +6,7 @@
/* */
/* */
/* */
/* (C) 1998-2004 Ullrich von Bassewitz */
/* (C) 1998-2006 Ullrich von Bassewitz */
/* R<>merstra<72>e 52 */
/* D-70794 Filderstadt */
/* EMail: uz@cc65.org */
@@ -75,16 +75,21 @@ SymEntry* SymLast = 0;
SymEntry* NewSymEntry (const char* Name, unsigned Flags)
/* Allocate a symbol table entry, initialize and return it */
{
unsigned I;
/* Allocate memory */
SymEntry* S = xmalloc (sizeof (SymEntry));
/* Initialize the entry */
S->Left = 0;
S->Right = 0;
S->Locals = 0;
S->SymTab = 0;
S->Pos = CurPos;
S->Flags = Flags;
S->Left = 0;
S->Right = 0;
S->Locals = 0;
S->SymTab = 0;
S->Pos = CurPos;
for (I = 0; I < sizeof (S->GuessedUse) / sizeof (S->GuessedUse[0]); ++I) {
S->GuessedUse[I] = 0;
}
S->Flags = Flags;
S->Expr = 0;
S->ExprRefs = AUTO_COLLECTION_INITIALIZER;
S->ExportSize = ADDR_SIZE_DEFAULT;
@@ -193,7 +198,7 @@ static void SymReplaceExprRefs (SymEntry* S)
/* Safety */
CHECK (E->Op == EXPR_SYMBOL && E->V.Sym == S);
/* We cannot touch the root node, since there are pointers to it.
/* We cannot touch the root node, since there are pointers to it.
* Replace it by a literal node.
*/
E->Op = EXPR_LITERAL;
@@ -252,7 +257,7 @@ void SymDef (SymEntry* S, ExprNode* Expr, unsigned char AddrSize, unsigned Flags
/* Set the symbol value */
S->Expr = Expr;
/* In case of a variable symbol, walk over all expressions containing
/* In case of a variable symbol, walk over all expressions containing
* this symbol and replace the (sub-)expression by the literal value of
* the tree. Be sure to replace the expression node in place, since there
* may be pointers to it.
@@ -549,6 +554,32 @@ void SymConDes (SymEntry* S, unsigned char AddrSize, unsigned Type, unsigned Pri
void SymGuessedAddrSize (SymEntry* Sym, unsigned char AddrSize)
/* Mark the address size of the given symbol as guessed. The address size
* passed as argument is the one NOT used, because the actual address size
* wasn't known. Example: Zero page addressing was not used because symbol
* is undefined, and absolute addressing was available.
*/
{
/* We must have a valid address size passed */
PRECONDITION (AddrSize != ADDR_SIZE_DEFAULT);
/* We do not support all address sizes currently */
if (AddrSize > sizeof (Sym->GuessedUse) / sizeof (Sym->GuessedUse[0])) {
return;
}
/* We can only remember one such occurance */
if (Sym->GuessedUse[AddrSize-1]) {
return;
}
/* Ok, remember the file position */
Sym->GuessedUse[AddrSize-1] = xdup (&CurPos, sizeof (CurPos));
}
void SymExportFromGlobal (SymEntry* S)
/* Called at the end of assembly. Converts a global symbol that is defined
* into an export.