Omit the unnecessary AggInfo.mnReg field.

FossilOrigin-Name: d79c58ef08b917bacc0f24d210d8eb23f659f955c219b4757af42eee8f17099b

manifest

@@ -1,5 +1,5 @@
-C Factor\sout\sthe\sallocation\sof\sregisters\sfor\saggregates\sinto\sa\sseparate\nsubroutine.
-D 2022-11-22T14:10:22.456
+C Omit\sthe\sunnecessary\sAggInfo.mnReg\sfield.
+D 2022-11-22T14:31:13.165
 F .fossil-settings/empty-dirs dbb81e8fc0401ac46a1491ab34a7f2c7c0452f2f06b54ebb845d024ca8283ef1
 F .fossil-settings/ignore-glob 35175cdfcf539b2318cb04a9901442804be81cd677d8b889fcc9149c21f239ea
 F LICENSE.md df5091916dbb40e6e9686186587125e1b2ff51f022cc334e886c19a0e9982724
@@ -641,12 +641,12 @@ F src/printf.c e99ee9741e79ae3873458146f59644276657340385ade4e76a5f5d1c25793764
 F src/random.c 606b00941a1d7dd09c381d3279a058d771f406c5213c9932bbd93d5587be4b9c
 F src/resolve.c efea4e5fbecfd6d0a9071b0be0d952620991673391b6ffaaf4c277b0bb674633
 F src/rowset.c ba9515a922af32abe1f7d39406b9d35730ed65efab9443dc5702693b60854c92
-F src/select.c 32d4f232ee178a4a57595061f26b10d6c51c3530cc3e721311c586201f41337a
+F src/select.c 27822fc0fe69d316448294c44c638bd1aad9b980ad62f0a7bb501555245eeb26
 F src/shell.c.in 16740a86346ba9823f92528ec588f2b74f68166dac965dabd19883ace230f11d
 F src/sqlite.h.in 100fc660c2f19961b8ed8437b9d53d687de2f8eb2b96437ec6da216adcb643ca
 F src/sqlite3.rc 5121c9e10c3964d5755191c80dd1180c122fc3a8
 F src/sqlite3ext.h c4b9fa7a7e2bcdf850cfeb4b8a91d5ec47b7a00033bc996fd2ee96cbf2741f5f
-F src/sqliteInt.h 62ff4e899d1a10e7fe60617f9d58ad49f20de4ad30ee02b68dc403ece984b617
+F src/sqliteInt.h a16a36f7b2a77b66f8ed0a460aad9f0a5f2897026a51d656cb3556461d1f6be3
 F src/sqliteLimit.h d7323ffea5208c6af2734574bae933ca8ed2ab728083caa117c9738581a31657
 F src/status.c 160c445d7d28c984a0eae38c144f6419311ed3eace59b44ac6dafc20db4af749
 F src/table.c 0f141b58a16de7e2fbe81c308379e7279f4c6b50eb08efeec5892794a0ba30d1
@@ -2059,8 +2059,8 @@ F vsixtest/vsixtest.tcl 6a9a6ab600c25a91a7acc6293828957a386a8a93
 F vsixtest/vsixtest.vcxproj.data 2ed517e100c66dc455b492e1a33350c1b20fbcdc
 F vsixtest/vsixtest.vcxproj.filters 37e51ffedcdb064aad6ff33b6148725226cd608e
 F vsixtest/vsixtest_TemporaryKey.pfx e5b1b036facdb453873e7084e1cae9102ccc67a0
-P cba837eae93f6b842d4e78ef00661a4f09deb99c53f12b3e8f46763749602597
-R 8ec59d9575fc141fe0aff25c195ea672
+P 4475799d5b41e93eabc32fac502ac2de240642b3b64739216e32e9af92ee191d
+R 5936ef480bfa81b2caa13a6a172023d0
 U drh
-Z dd7dd4863c6318a4016da919a253840a
+Z 8bcded315dd8c6f4a10b877ff07bc1b3
 # Remove this line to create a well-formed Fossil manifest.

manifest.uuid

@@ -1 +1 @@
-4475799d5b41e93eabc32fac502ac2de240642b3b64739216e32e9af92ee191d
+d79c58ef08b917bacc0f24d210d8eb23f659f955c219b4757af42eee8f17099b

src/select.c

@@ -6211,9 +6211,7 @@ void sqlite3SelectPrep(
 static void assignAggregateRegisters(Parse *pParse, AggInfo *pAggInfo){
   int i, m;
   assert( pAggInfo!=0 );
-  assert( pAggInfo->mnReg==0 );
   m = pParse->nMem;
-  pAggInfo->mnReg = m+1;
   for(i=0; i<pAggInfo->nColumn; i++) pAggInfo->aCol[i].iMem = ++m;
   for(i=0; i<pAggInfo->nFunc; i++) pAggInfo->aFunc[i].iMem = ++m;
   pParse->nMem = m;
@@ -6230,26 +6228,34 @@ static void assignAggregateRegisters(Parse *pParse, AggInfo *pAggInfo){
 static void resetAccumulator(Parse *pParse, AggInfo *pAggInfo){
   Vdbe *v = pParse->pVdbe;
   int i;
+  int iFirstReg;
   struct AggInfo_func *pFunc;
   int nReg = pAggInfo->nFunc + pAggInfo->nColumn;
   assert( pParse->db->pParse==pParse );
   assert( pParse->db->mallocFailed==0 || pParse->nErr!=0 );
-  assert( pAggInfo->mnReg>0 ); /* assignAggregateRegisters() has been run */
   if( nReg==0 ) return;
   if( pParse->nErr ) return;
+  if( pAggInfo->nColumn==0 ){
+    iFirstReg = pAggInfo->aFunc[0].iMem;
+  }else{
+    iFirstReg = pAggInfo->aCol[0].iMem;
+  }
 #ifdef SQLITE_DEBUG
-  /* Verify that all AggInfo registers are within the range specified by
-  ** AggInfo.mnReg..(AggInfo.mnReg+nReg-1) */
+  /* Verify that all AggInfo register numbers have been assigned and that
+  ** they are all sequential. */
+  assert( iFirstReg>0 );
   for(i=0; i<pAggInfo->nColumn; i++){
-    assert( pAggInfo->aCol[i].iMem>=pAggInfo->mnReg
-         && pAggInfo->aCol[i].iMem<pAggInfo->mnReg+nReg );
+    assert( pAggInfo->aCol[i].iMem>=iFirstReg );
+    assert( i==0 || pAggInfo->aCol[i].iMem==pAggInfo->aCol[i-1].iMem+1 );
   }
   for(i=0; i<pAggInfo->nFunc; i++){
-    assert( pAggInfo->aFunc[i].iMem>=pAggInfo->mnReg
-         && pAggInfo->aFunc[i].iMem<pAggInfo->mnReg+nReg );
+    assert( pAggInfo->aFunc[i].iMem>=iFirstReg );
+    assert( i>0 || pAggInfo->nColumn==0
+      || pAggInfo->aFunc[i].iMem==pAggInfo->aCol[pAggInfo->nColumn-1].iMem+1 );
+    assert( i==0 || pAggInfo->aFunc[i].iMem==pAggInfo->aFunc[i-1].iMem+1 );
   }
 #endif
-  sqlite3VdbeAddOp3(v, OP_Null, 0, pAggInfo->mnReg, pAggInfo->mnReg+nReg-1);
+  sqlite3VdbeAddOp3(v, OP_Null, 0, iFirstReg, iFirstReg+nReg-1);
   for(pFunc=pAggInfo->aFunc, i=0; i<pAggInfo->nFunc; i++, pFunc++){
     if( pFunc->iDistinct>=0 ){
       Expr *pE = pFunc->pFExpr;

src/sqliteInt.h

@@ -2719,7 +2719,6 @@ struct AggInfo {
   int sortingIdx;         /* Cursor number of the sorting index */
   int sortingIdxPTab;     /* Cursor number of pseudo-table */
   int nSortingColumn;     /* Number of columns in the sorting index */
-  int mnReg;              /* First in a range of regsiters for aCol and aFunc */
   ExprList *pGroupBy;     /* The group by clause */
   struct AggInfo_col {    /* For each column used in source tables */
     Table *pTab;             /* Source table */