From: drh <>
Date: Sat, 23 Jul 2022 12:51:48 +0000 (+0000)
Subject: Simplifications to sqlite3FinishCoding() for a small size reduction and
X-Git-Tag: version-3.40.0~280
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=7bace9e9bb3d2b67b5a3e5e567b7be2cd9cc1e97;p=thirdparty%2Fsqlite.git

Simplifications to sqlite3FinishCoding() for a small size reduction and
performance increase.

FossilOrigin-Name: a995614b9aedf4492e6d7b777293770f268837f8246e1678ef0523738c8a8339
---

diff --git a/manifest b/manifest
index 3578f3ff26..2e7a764e4f 100644
--- a/manifest
+++ b/manifest
@@ -1,5 +1,5 @@
-C Remove\sa\sbranch\sthat\sis\sno\slonger\sreachable\sdue\sto\sthe\sprevious\scheck-in.
-D 2022-07-23T00:53:48.586
+C Simplifications\sto\ssqlite3FinishCoding()\sfor\sa\ssmall\ssize\sreduction\sand\nperformance\sincrease.
+D 2022-07-23T12:51:48.615
 F .fossil-settings/empty-dirs dbb81e8fc0401ac46a1491ab34a7f2c7c0452f2f06b54ebb845d024ca8283ef1
 F .fossil-settings/ignore-glob 35175cdfcf539b2318cb04a9901442804be81cd677d8b889fcc9149c21f239ea
 F LICENSE.md df5091916dbb40e6e9686186587125e1b2ff51f022cc334e886c19a0e9982724
@@ -513,7 +513,7 @@ F src/btmutex.c 8acc2f464ee76324bf13310df5692a262b801808984c1b79defb2503bbafadb6
 F src/btree.c 1307d57f65023c9f37c2b6c62253343fca63877f161f694a593b14c0883cedda
 F src/btree.h 74d64b8f28cfa4a894d14d4ed64fa432cd697b98b61708d4351482ae15913e22
 F src/btreeInt.h 8ce1332edd89dfd2461d561ac10a0ab5601c8e06200cb5230596c3caaf54482e
-F src/build.c 149663ba16fc023d3ee1929d2fac40e0055617cd58e49d4e75b99376ddd40bd3
+F src/build.c 249fb44843805cded2003e0e678ab65acb98ae0982e23256d4d0a7576a440eb3
 F src/callback.c 4c19af69835787bfe790ac560f3071a824eb629f34e41f97b52ce5235c77de1c
 F src/complete.c a3634ab1e687055cd002e11b8f43eb75c17da23e
 F src/ctime.c 026dbdcdbd8c3cde98a88483ee88310ff43150ab164ad768f12cc700a11495ad
@@ -1981,8 +1981,8 @@ F vsixtest/vsixtest.tcl 6a9a6ab600c25a91a7acc6293828957a386a8a93
 F vsixtest/vsixtest.vcxproj.data 2ed517e100c66dc455b492e1a33350c1b20fbcdc
 F vsixtest/vsixtest.vcxproj.filters 37e51ffedcdb064aad6ff33b6148725226cd608e
 F vsixtest/vsixtest_TemporaryKey.pfx e5b1b036facdb453873e7084e1cae9102ccc67a0
-P 2a6f6971fa010219323b976ff53b2606e39fb43fd36c394837c3a8528bf3c425
-R 620499f569e880513867b67bc9090f80
+P 8b4d1b9317624f443fe526858bfe3da5281ba83de1828c62935f48b3e7cf2a88
+R 4e3eaba4ea506cda95e5ca36886afbe8
 U drh
-Z 0dba3b3710f22c731b61e5cb97b7e027
+Z 03b9158b57b304bce795274f430799f1
 # Remove this line to create a well-formed Fossil manifest.
diff --git a/manifest.uuid b/manifest.uuid
index 2f48cc1742..d3e71676b3 100644
--- a/manifest.uuid
+++ b/manifest.uuid
@@ -1 +1 @@
-8b4d1b9317624f443fe526858bfe3da5281ba83de1828c62935f48b3e7cf2a88
\ No newline at end of file
+a995614b9aedf4492e6d7b777293770f268837f8246e1678ef0523738c8a8339
\ No newline at end of file
diff --git a/src/build.c b/src/build.c
index b48876ac52..df33c493a4 100644
--- a/src/build.c
+++ b/src/build.c
@@ -140,6 +140,7 @@ int sqlite3DbMaskAllZero(yDbMask m){
 void sqlite3FinishCoding(Parse *pParse){
   sqlite3 *db;
   Vdbe *v;
+  int iDb, i;
 
   assert( pParse->pToplevel==0 );
   db = pParse->db;
@@ -206,74 +207,69 @@ void sqlite3FinishCoding(Parse *pParse){
     ** transaction on each used database and to verify the schema cookie
     ** on each used database.
     */
-    if( db->mallocFailed==0 
-     && (DbMaskNonZero(pParse->cookieMask) || pParse->pConstExpr)
-    ){
-      int iDb, i;
-      assert( sqlite3VdbeGetOp(v, 0)->opcode==OP_Init );
-      sqlite3VdbeJumpHere(v, 0);
-      assert( db->nDb>0 );
-      iDb = 0;
-      do{
-        Schema *pSchema;
-        if( DbMaskTest(pParse->cookieMask, iDb)==0 ) continue;
-        sqlite3VdbeUsesBtree(v, iDb);
-        pSchema = db->aDb[iDb].pSchema;
-        sqlite3VdbeAddOp4Int(v,
-          OP_Transaction,                    /* Opcode */
-          iDb,                               /* P1 */
-          DbMaskTest(pParse->writeMask,iDb), /* P2 */
-          pSchema->schema_cookie,            /* P3 */
-          pSchema->iGeneration               /* P4 */
-        );
-        if( db->init.busy==0 ) sqlite3VdbeChangeP5(v, 1);
-        VdbeComment((v,
-              "usesStmtJournal=%d", pParse->mayAbort && pParse->isMultiWrite));
-      }while( ++iDb<db->nDb );
+    assert( pParse->nErr>0 || sqlite3VdbeGetOp(v, 0)->opcode==OP_Init );
+    sqlite3VdbeJumpHere(v, 0);
+    assert( db->nDb>0 );
+    iDb = 0;
+    do{
+      Schema *pSchema;
+      if( DbMaskTest(pParse->cookieMask, iDb)==0 ) continue;
+      sqlite3VdbeUsesBtree(v, iDb);
+      pSchema = db->aDb[iDb].pSchema;
+      sqlite3VdbeAddOp4Int(v,
+        OP_Transaction,                    /* Opcode */
+        iDb,                               /* P1 */
+        DbMaskTest(pParse->writeMask,iDb), /* P2 */
+        pSchema->schema_cookie,            /* P3 */
+        pSchema->iGeneration               /* P4 */
+      );
+      if( db->init.busy==0 ) sqlite3VdbeChangeP5(v, 1);
+      VdbeComment((v,
+            "usesStmtJournal=%d", pParse->mayAbort && pParse->isMultiWrite));
+    }while( ++iDb<db->nDb );
 #ifndef SQLITE_OMIT_VIRTUALTABLE
-      for(i=0; i<pParse->nVtabLock; i++){
-        char *vtab = (char *)sqlite3GetVTable(db, pParse->apVtabLock[i]);
-        sqlite3VdbeAddOp4(v, OP_VBegin, 0, 0, 0, vtab, P4_VTAB);
-      }
-      pParse->nVtabLock = 0;
+    for(i=0; i<pParse->nVtabLock; i++){
+      char *vtab = (char *)sqlite3GetVTable(db, pParse->apVtabLock[i]);
+      sqlite3VdbeAddOp4(v, OP_VBegin, 0, 0, 0, vtab, P4_VTAB);
+    }
+    pParse->nVtabLock = 0;
 #endif
 
-      /* Once all the cookies have been verified and transactions opened, 
-      ** obtain the required table-locks. This is a no-op unless the 
-      ** shared-cache feature is enabled.
-      */
-      codeTableLocks(pParse);
+    /* Once all the cookies have been verified and transactions opened, 
+    ** obtain the required table-locks. This is a no-op unless the 
+    ** shared-cache feature is enabled.
+    */
+    codeTableLocks(pParse);
 
-      /* Initialize any AUTOINCREMENT data structures required.
-      */
-      sqlite3AutoincrementBegin(pParse);
-
-      /* Code constant expressions that where factored out of inner loops.
-      **
-      ** The pConstExpr list might also contain expressions that we simply
-      ** want to keep around until the Parse object is deleted.  Such
-      ** expressions have iConstExprReg==0.  Do not generate code for
-      ** those expressions, of course.
-      */
-      if( pParse->pConstExpr ){
-        ExprList *pEL = pParse->pConstExpr;
-        pParse->okConstFactor = 0;
-        for(i=0; i<pEL->nExpr; i++){
-          int iReg = pEL->a[i].u.iConstExprReg;
-          sqlite3ExprCode(pParse, pEL->a[i].pExpr, iReg);
-        }
-      }
+    /* Initialize any AUTOINCREMENT data structures required.
+    */
+    sqlite3AutoincrementBegin(pParse);
 
-      if( pParse->bReturning ){
-        Returning *pRet = pParse->u1.pReturning;
-        if( pRet->nRetCol ){
-          sqlite3VdbeAddOp2(v, OP_OpenEphemeral, pRet->iRetCur, pRet->nRetCol);
-        }
+    /* Code constant expressions that where factored out of inner loops.
+    **
+    ** The pConstExpr list might also contain expressions that we simply
+    ** want to keep around until the Parse object is deleted.  Such
+    ** expressions have iConstExprReg==0.  Do not generate code for
+    ** those expressions, of course.
+    */
+    if( pParse->pConstExpr ){
+      ExprList *pEL = pParse->pConstExpr;
+      pParse->okConstFactor = 0;
+      for(i=0; i<pEL->nExpr; i++){
+        int iReg = pEL->a[i].u.iConstExprReg;
+        sqlite3ExprCode(pParse, pEL->a[i].pExpr, iReg);
       }
+    }
 
-      /* Finally, jump back to the beginning of the executable code. */
-      sqlite3VdbeGoto(v, 1);
+    if( pParse->bReturning ){
+      Returning *pRet = pParse->u1.pReturning;
+      if( pRet->nRetCol ){
+        sqlite3VdbeAddOp2(v, OP_OpenEphemeral, pRet->iRetCur, pRet->nRetCol);
+      }
     }
+
+    /* Finally, jump back to the beginning of the executable code. */
+    sqlite3VdbeGoto(v, 1);
   }
 
   /* Get the VDBE program ready for execution