Remove dead code identified by the clang static analyzer.

FossilOrigin-Name: 01a79d5a7af48fb7e50291c0c7c6283d3fb359d0

12 files changed, 21 insertions, 41 deletions

diff --git a/manifest b/manifest
index de72b49b0..6030f4be7 100644
--- a/manifest
+++ b/manifest
@@ -1,8 +1,8 @@
 -----BEGIN PGP SIGNED MESSAGE-----
 Hash: SHA1
 
-C Simplifications\sto\sthe\soverflow-free\smultiplier.\s\sAlso\sremove\ssome\scommented-out\ncode\sthat\swas\sleft\sin\sthat\ssubroutine\sby\smistake\son\sthe\sprevious\scheck-in.
-D 2011-03-05T21:41:34.187
+C Remove\sdead\scode\sidentified\sby\sthe\sclang\sstatic\sanalyzer.
+D 2011-03-06T21:28:32.373
 F Makefile.arm-wince-mingw32ce-gcc d6df77f1f48d690bd73162294bbba7f59507c72f
 F Makefile.in 27701a1653595a1f2187dc61c8117e00a6c1d50f
 F Makefile.linux-gcc 91d710bdc4998cb015f39edf3cb314ec4f4d7e23
@@ -124,7 +124,7 @@ F src/auth.c 523da7fb4979469955d822ff9298352d6b31de34
 F src/backup.c 6728d6d48d55b449af76a3e51c0808849cb32a2e
 F src/bitvec.c af50f1c8c0ff54d6bdb7a80e2fceca5a93670bef
 F src/btmutex.c 96a12f50f7a17475155971a241d85ec5171573ff
-F src/btree.c ca9f44866554f634c12806635bc5b063d70bca9b
+F src/btree.c 33265f923a6bcbc035a0914699ab312b93584791
 F src/btree.h e2f2cd9933bf30724f53ffa12c4c5a3a864bbd6e
 F src/btreeInt.h 20f73dc93b1eeb83afd7259fbc6bd7dcf2df7fe4
 F src/build.c 00a327120d81ace6267e714ae8010c997d55de5d
@@ -135,13 +135,13 @@ F src/date.c 1548fdac51377e4e7833251de878b4058c148e1b
 F src/delete.c 7ed8a8c8b5f748ece92df173d7e0f7810c899ebd
 F src/expr.c 66c9383e5e1f5259c43ef3aa7883da66cfc0f492
 F src/fault.c 160a0c015b6c2629d3899ed2daf63d75754a32bb
-F src/fkey.c 17950a28f28b23e8ad3feaac5fc88c324d2f600a
+F src/fkey.c 418b840007c873975fd0d071746d952f8bca20ce
 F src/func.c 3a8cb2fb2de3e3aed7f39106daf4878d9d17fcce
 F src/global.c 02335177cf6946fe5525c6f0755cf181140debf3
 F src/hash.c 458488dcc159c301b8e7686280ab209f1fb915af
 F src/hash.h 2894c932d84d9f892d4b4023a75e501f83050970
 F src/hwtime.h d32741c8f4df852c7d959236615444e2b1063b08
-F src/insert.c a4995747c062256582a90b4f87f716e11b067050
+F src/insert.c 036cfac4be398db9dccdf3200a45e3a7260fcfb2
 F src/journal.c 552839e54d1bf76fb8f7abe51868b66acacf6a0e
 F src/legacy.c a199d7683d60cef73089e892409113e69c23a99f
 F src/lempar.c 7f026423f4d71d989e719a743f98a1cbd4e6d99e
@@ -174,7 +174,7 @@ F src/pcache.c 09d38c44ab275db581f7a2f6ff8b9bc7f8c0faaa
 F src/pcache.h c683390d50f856d4cd8e24342ae62027d1bb6050
 F src/pcache1.c d548e31beafa792d1994b663a29a5303569efc4e
 F src/pragma.c a83f320497aee18eda60fc8d854df5897906c2b1
-F src/prepare.c 395b3fab1b93f45b6aa194b23ebc201221c47b99
+F src/prepare.c 319b47280b6281e6d4f6c57a1651e4f1ea3dac8a
 F src/printf.c 585a36b6a963df832cfb69505afa3a34ed5ef8a1
 F src/random.c cd4a67b3953b88019f8cd4ccd81394a8ddfaba50
 F src/resolve.c 1c0f32b64f8e3f555fe1f732f9d6f501a7f05706
@@ -228,24 +228,24 @@ F src/test_thread.c bedd05cad673dba53326f3aa468cc803038896c0
 F src/test_vfs.c 2ed8853c1e51ac6f9ea091f7ce4e0d618bba8b86
 F src/test_wsd.c 41cadfd9d97fe8e3e4e44f61a4a8ccd6f7ca8fe9
 F src/tokenize.c 604607d6813e9551cf5189d899e0a25c12681080
-F src/trigger.c b8bedb9c0084ceb51a40f54fcca2ce048c8de852
-F src/update.c c40aedd40baf460806f1c9f2cbe4a1dac445ee91
+F src/trigger.c 95d2ff4b2996fabe886c9764b5978980e29f4afa
+F src/update.c 81911be16ece3c3e7716aa18565b4814ec41f8b9
 F src/utf.c 1baeeac91707a4df97ccc6141ec0f808278af685
 F src/util.c 0e04fb389132f3cfbd5ea69a096206da1cbf32de
 F src/vacuum.c 924bd1bcee2dfb05376f79845bd3b4cec7b54b2f
-F src/vdbe.c 038e5689e48cd6597158c5dc34f8d40a03a87ad7
+F src/vdbe.c ac6e8b8264dcc0e4beea44307ff63b1275a9ca3e
 F src/vdbe.h 4de0efb4b0fdaaa900cf419b35c458933ef1c6d2
 F src/vdbeInt.h 6e6f28e9bccc6c703dca1372fd661c57b5c15fb0
-F src/vdbeapi.c 8e9324fd35eb70d0b5904bd1af40f2598744dc4d
+F src/vdbeapi.c a09ad9164cafc505250d5dd6b69660c960f1308c
 F src/vdbeaux.c 3ce2588ffe921e457d00baee7dd409afabe8c8af
 F src/vdbeblob.c 18955f0ee6b133cd08e1592010cb9a6b11e9984c
 F src/vdbemem.c d8f713bcc3e176040d3e2bb4fbffc3b31faa4252
 F src/vdbetrace.c 3ba13bc32bdf16d2bdea523245fd16736bed67b5
 F src/vtab.c b297e8fa656ab5e66244ab15680d68db0adbec30
-F src/wal.c 5386fb5e13c2daa8ab9062597fdc17bd849da371
+F src/wal.c 7334009b396285b658a95a3b6bc6d2b016a1f794
 F src/wal.h 7a5fbb00114b7f2cd40c7e1003d4c41ce9d26840
 F src/walker.c 3112bb3afe1d85dc52317cb1d752055e9a781f8f
-F src/where.c d7b073867e7bab0b851c659ad4899ce72cc9b81d
+F src/where.c 3bc364eeff8625a8438f2bf3a6288c721c9ae475
 F test/aggerror.test a867e273ef9e3d7919f03ef4f0e8c0d2767944f2
 F test/alias.test 4529fbc152f190268a15f9384a5651bbbabc9d87
 F test/all.test 51756962d522e474338e9b2ebb26e7364d4aa125
@@ -914,14 +914,14 @@ F tool/speedtest2.tcl ee2149167303ba8e95af97873c575c3e0fab58ff
 F tool/speedtest8.c 2902c46588c40b55661e471d7a86e4dd71a18224
 F tool/speedtest8inst1.c 293327bc76823f473684d589a8160bde1f52c14e
 F tool/vdbe-compress.tcl d70ea6d8a19e3571d7ab8c9b75cba86d1173ff0f
-P abf21394124a0af46f072793718964cee2ce55d0
-R 24060eb83e7955ab55ced35ef7d2ddfd
+P 55fc25fdab61e6094289e068c343e012fec10439
+R 12067f25ef6d42b31ec1713c62b3af5b
 U drh
-Z f1d3fbfcdf98a3d3e54748471aba836e
+Z f391775b0fd982b73d9e78e75989978c
 -----BEGIN PGP SIGNATURE-----
 Version: GnuPG v1.4.6 (GNU/Linux)
 
-iD8DBQFNcq4RoxKgR168RlERAmdSAJ9o51MyoK1fC2ug7/Csp3X3zbAPjQCfdi/3
-uxlCQmct6yZ8VJBAl19dNj8=
-=owHF
+iD8DBQFNc/yDoxKgR168RlERAl2jAJ4kMYknXNTsPPqeB+kXrqAfSTDEfACdFMXH
+LGyAxYgzfXlJh1jt92GH+Uc=
+=iKUD
 -----END PGP SIGNATURE-----
diff --git a/manifest.uuid b/manifest.uuid
index 348b2e8a6..c756f106a 100644
--- a/manifest.uuid
+++ b/manifest.uuid
@@ -1 +1 @@
-55fc25fdab61e6094289e068c343e012fec10439
\ No newline at end of file
+01a79d5a7af48fb7e50291c0c7c6283d3fb359d0
\ No newline at end of file
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++){