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Always clear the temporary register cache after coding a subroutine.

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FossilOrigin-Name: b6f2a7f9cdb547c925f08306df82519e41a7a0dd2cabd9861a48917bb6eef845
This commit is contained in:
drh
2019-09-18 20:34:54 +00:00
parent 572b0dddee
commit 6d2566dfc2
4 changed files with 31 additions and 10 deletions
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7
src/expr.c
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@@ -2867,6 +2867,7 @@ void sqlite3CodeRhsOfIN(
/* Subroutine return */
sqlite3VdbeAddOp1(v, OP_Return, pExpr->y.sub.regReturn);
sqlite3VdbeChangeP1(v, pExpr->y.sub.iAddr-1, sqlite3VdbeCurrentAddr(v)-1);
sqlite3ClearTempRegCache(pParse);
}
}
#endif /* SQLITE_OMIT_SUBQUERY */
@@ -2977,6 +2978,7 @@ int sqlite3CodeSubselect(Parse *pParse, Expr *pExpr){
/* Subroutine return */
sqlite3VdbeAddOp1(v, OP_Return, pExpr->y.sub.regReturn);
sqlite3VdbeChangeP1(v, pExpr->y.sub.iAddr-1, sqlite3VdbeCurrentAddr(v)-1);
sqlite3ClearTempRegCache(pParse);
}
return rReg;
@@ -5608,6 +5610,11 @@ void sqlite3ReleaseTempRange(Parse *pParse, int iReg, int nReg){
/*
** Mark all temporary registers as being unavailable for reuse.
**
** Always invoke this procedure after coding a subroutine or co-routine
** that might be invoked from other parts of the code, to ensure that
** the sub/co-routine does not use registers in common with the code that
** invokes the sub/co-routine.
*/
void sqlite3ClearTempRegCache(Parse *pParse){
pParse->nTempReg = 0;