Remove dead code identified by the clang static analyzer.

FossilOrigin-Name: 01a79d5a7af48fb7e50291c0c7c6283d3fb359d0

10 files changed, 2 insertions, 22 deletions

diff --git a/src/btree.c b/src/btree.c
index f5960da38..fa0889adb 100644
--- a/src/btree.c
+++ b/src/btree.c
@@ -6179,9 +6179,7 @@ static int balance_nonroot(
       }
     }
     if( minI>i ){
-      int t;
       MemPage *pT;
-      t = apNew[i]->pgno;
       pT = apNew[i];
       apNew[i] = apNew[minI];
       apNew[minI] = pT;
diff --git a/src/fkey.c b/src/fkey.c
index a385b814e..653cc1833 100644
--- a/src/fkey.c
+++ b/src/fkey.c
@@ -687,7 +687,6 @@ void sqlite3FkCheck(
   int regNew                      /* New row data is stored here */
 ){
   sqlite3 *db = pParse->db;       /* Database handle */
-  Vdbe *v;                        /* VM to write code to */
   FKey *pFKey;                    /* Used to iterate through FKs */
   int iDb;                        /* Index of database containing pTab */
   const char *zDb;                /* Name of database containing pTab */
@@ -699,7 +698,6 @@ void sqlite3FkCheck(
   /* If foreign-keys are disabled, this function is a no-op. */
   if( (db->flags&SQLITE_ForeignKeys)==0 ) return;
 
-  v = sqlite3GetVdbe(pParse);
   iDb = sqlite3SchemaToIndex(db, pTab->pSchema);
   zDb = db->aDb[iDb].zName;
 
diff --git a/src/insert.c b/src/insert.c
index adf6ef2ed..851f778d4 100644
--- a/src/insert.c
+++ b/src/insert.c
@@ -465,7 +465,6 @@ void sqlite3Insert(
   int regIns;           /* Block of regs holding rowid+data being inserted */
   int regRowid;         /* registers holding insert rowid */
   int regData;          /* register holding first column to insert */
-  int regRecord;        /* Holds the assemblied row record */
   int regEof = 0;       /* Register recording end of SELECT data */
   int *aRegIdx = 0;     /* One register allocated to each index */
 
@@ -794,7 +793,6 @@ void sqlite3Insert(
   /* Allocate registers for holding the rowid of the new row,
   ** the content of the new row, and the assemblied row record.
   */
-  regRecord = ++pParse->nMem;
   regRowid = regIns = pParse->nMem+1;
   pParse->nMem += pTab->nCol + 1;
   if( IsVirtual(pTab) ){
@@ -1188,7 +1186,7 @@ void sqlite3GenerateConstraintChecks(
       case OE_Rollback:
       case OE_Fail: {
         char *zMsg;
-        j1 = sqlite3VdbeAddOp3(v, OP_HaltIfNull,
+        sqlite3VdbeAddOp3(v, OP_HaltIfNull,
                                   SQLITE_CONSTRAINT, onError, regData+i);
         zMsg = sqlite3MPrintf(pParse->db, "%s.%s may not be NULL",
                               pTab->zName, pTab->aCol[i].zName);
diff --git a/src/prepare.c b/src/prepare.c
index 62a33b671..d778b8ba9 100644
--- a/src/prepare.c
+++ b/src/prepare.c
@@ -141,7 +141,7 @@ static int sqlite3InitOne(sqlite3 *db, int iDb, char **pzErrMsg){
   int meta[5];
   InitData initData;
   char const *zMasterSchema;
-  char const *zMasterName = SCHEMA_TABLE(iDb);
+  char const *zMasterName;
   int openedTransaction = 0;
 
   /*
diff --git a/src/trigger.c b/src/trigger.c
index b1d43d06d..ba8d47bcc 100644
--- a/src/trigger.c
+++ b/src/trigger.c
@@ -262,7 +262,6 @@ void sqlite3FinishTrigger(
   int iDb;                                /* Database containing the trigger */
   Token nameToken;                        /* Trigger name for error reporting */
 
-  pTrig = pParse->pNewTrigger;
   pParse->pNewTrigger = 0;
   if( NEVER(pParse->nErr) || !pTrig ) goto triggerfinish_cleanup;
   zName = pTrig->zName;
diff --git a/src/update.c b/src/update.c
index 045b4d176..315034d86 100644
--- a/src/update.c
+++ b/src/update.c
@@ -128,7 +128,6 @@ void sqlite3Update(
   int regNew;
   int regOld = 0;
   int regRowSet = 0;     /* Rowset of rows to be updated */
-  int regRec;            /* Register used for new table record to insert */
 
   memset(&sContext, 0, sizeof(sContext));
   db = pParse->db;
@@ -286,7 +285,6 @@ void sqlite3Update(
   }
   regNew = pParse->nMem + 1;
   pParse->nMem += pTab->nCol;
-  regRec = ++pParse->nMem;
 
   /* Start the view context. */
   if( isView ){
diff --git a/src/vdbe.c b/src/vdbe.c
index 823688e79..828baa529 100644
--- a/src/vdbe.c
+++ b/src/vdbe.c
@@ -2429,7 +2429,6 @@ case OP_MakeRecord: {
   */
   nData = 0;         /* Number of bytes of data space */
   nHdr = 0;          /* Number of bytes of header space */
-  nByte = 0;         /* Data space required for this record */
   nZero = 0;         /* Number of zero bytes at the end of the record */
   nField = pOp->p1;
   zAffinity = pOp->p4.z;
@@ -3703,7 +3702,6 @@ case OP_NewRowid: {           /* out2-prerelease */
     ** and try again, up to 100 times.
     */
     assert( pC->isTable );
-    cnt = 0;
 
 #ifdef SQLITE_32BIT_ROWID
 #   define MAX_ROWID 0x7fffffff
diff --git a/src/vdbeapi.c b/src/vdbeapi.c
index 5578b868e..76cd9215a 100644
--- a/src/vdbeapi.c
+++ b/src/vdbeapi.c
@@ -682,13 +682,11 @@ int sqlite3_data_count(sqlite3_stmt *pStmt){
 */
 static Mem *columnMem(sqlite3_stmt *pStmt, int i){
   Vdbe *pVm;
-  int vals;
   Mem *pOut;
 
   pVm = (Vdbe *)pStmt;
   if( pVm && pVm->pResultSet!=0 && i<pVm->nResColumn && i>=0 ){
     sqlite3_mutex_enter(pVm->db->mutex);
-    vals = sqlite3_data_count(pStmt);
     pOut = &pVm->pResultSet[i];
   }else{
     /* If the value passed as the second argument is out of range, return
diff --git a/src/wal.c b/src/wal.c
index 9f7545b61..51ea18fb2 100644
--- a/src/wal.c
+++ b/src/wal.c
@@ -1649,7 +1649,6 @@ static int walCheckpoint(
   }
   assert( pIter );
 
-  mxPage = pWal->hdr.nPage;
   if( eMode!=SQLITE_CHECKPOINT_PASSIVE ) xBusy = xBusyCall;
 
   /* Compute in mxSafeFrame the index of the last frame of the WAL that is
diff --git a/src/where.c b/src/where.c
index 727abdf3f..72529dde8 100644
--- a/src/where.c
+++ b/src/where.c
@@ -4047,7 +4047,6 @@ static Bitmask codeOneLoopStart(
     **
     */
     WhereClause *pOrWc;    /* The OR-clause broken out into subterms */
-    WhereTerm *pFinal;     /* Final subterm within the OR-clause. */
     SrcList *pOrTab;       /* Shortened table list or OR-clause generation */
 
     int regReturn = ++pParse->nMem;           /* Register used with OP_Gosub */
@@ -4063,7 +4062,6 @@ static Bitmask codeOneLoopStart(
     assert( pTerm->eOperator==WO_OR );
     assert( (pTerm->wtFlags & TERM_ORINFO)!=0 );
     pOrWc = &pTerm->u.pOrInfo->wc;
-    pFinal = &pOrWc->a[pOrWc->nTerm-1];
     pLevel->op = OP_Return;
     pLevel->p1 = regReturn;
 
@@ -4172,7 +4170,6 @@ static Bitmask codeOneLoopStart(
   ** the use of indices become tests that are evaluated against each row of
   ** the relevant input tables.
   */
-  k = 0;
   for(pTerm=pWC->a, j=pWC->nTerm; j>0; j--, pTerm++){
     Expr *pE;
     testcase( pTerm->wtFlags & TERM_VIRTUAL ); /* IMP: R-30575-11662 */
@@ -4190,7 +4187,6 @@ static Bitmask codeOneLoopStart(
       continue;
     }
     sqlite3ExprIfFalse(pParse, pE, addrCont, SQLITE_JUMPIFNULL);
-    k = 1;
     pTerm->wtFlags |= TERM_CODED;
   }
 
@@ -4498,8 +4494,6 @@ WhereInfo *sqlite3WhereBegin(
   ** clause.
   */
   notReady = ~(Bitmask)0;
-  pTabItem = pTabList->a;
-  pLevel = pWInfo->a;
   andFlags = ~0;
   WHERETRACE(("*** Optimizer Start ***\n"));
   for(i=iFrom=0, pLevel=pWInfo->a; i<nTabList; i++, pLevel++){