All essential opcodes can now operate out of registers and completely

avoid the stack.  Many still optionally use the stack to support legacy
code generation, but the stack is not required.  The next step is to
update all code generation to avoid using the stack. (CVS 4700)

FossilOrigin-Name: e3cf1c1c114bcda8fe577beb5ee55b4a651b96db

src/sqliteInt.h

@@ -11,7 +11,7 @@
 *************************************************************************
 ** Internal interface definitions for SQLite.
 **
-** @(#) $Id: sqliteInt.h,v 1.644 2008/01/08 23:54:25 drh Exp $
+** @(#) $Id: sqliteInt.h,v 1.645 2008/01/09 23:04:12 drh Exp $
 */
 #ifndef _SQLITEINT_H_
 #define _SQLITEINT_H_
@@ -481,7 +481,7 @@ struct sqlite3 {
   u8 autoCommit;                /* The auto-commit flag. */
   u8 temp_store;                /* 1: file 2: memory 0: default */
   u8 mallocFailed;              /* True if we have seen a malloc failure */
-  char nextAutovac;             /* Autovac setting after VACUUM if >=0 */
+  signed char nextAutovac;      /* Autovac setting after VACUUM if >=0 */
   int nTable;                   /* Number of tables in the database */
   CollSeq *pDfltColl;           /* The default collating sequence (BINARY) */
   i64 lastRowid;                /* ROWID of most recent insert (see above) */