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Fix to the register validity tracking logic in debug builds. No impact

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on release builds.

FossilOrigin-Name: 0a500da6aa659a8e73206e6d22ddbf2da5e4f1d1d551eeb66433163a3e13109d
This commit is contained in:
drh
2020-01-10 01:05:49 +00:00
parent e5f8801044
commit b2fe5a7c35
4 changed files with 35 additions and 16 deletions
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18
src/vdbeaux.c
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@@ -1209,14 +1209,16 @@ void sqlite3VdbeReleaseRegisters(
assert( pParse->pVdbe );
assert( iFirst>=1 );
assert( iFirst+N-1<=pParse->nMem );
while( N>0 && (mask&1)!=0 ){
mask >>= 1;
iFirst++;
N--;
}
while( N>0 && N<=32 && (mask & MASKBIT32(N-1))!=0 ){
mask &= ~MASKBIT32(N-1);
N--;
if( N<=31 && mask!=0 ){
while( N>0 && (mask&1)!=0 ){
mask >>= 1;
iFirst++;
N--;
}
while( N>0 && N<=32 && (mask & MASKBIT32(N-1))!=0 ){
mask &= ~MASKBIT32(N-1);
N--;
}
}
if( N>0 ){
sqlite3VdbeAddOp3(pParse->pVdbe, OP_ReleaseReg, iFirst, N, *(int*)&mask);