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Change the OP_DecrJumpZero opcode back to its old behavior of always

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decrementing, except top the decrementing when it reaches the largest negative
number.

FossilOrigin-Name: 9d0d8c2e7c529562889de02346733dcb532e9388
This commit is contained in:
drh 2016-11-30 05:08:59 +00:00
parent b5489b88b0
commit ab5be2e651
3 changed files with 12 additions and 14 deletions
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12
manifest
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@ -1,5 +1,5 @@
C More\simprovements\sto\sboundary\scases\sin\sthe\sdate/time\sfunctions,\sflowing\sout\nof\sbranch\scoverage\stesting.
D 2016-11-30T04:07:57.427
C Change\sthe\sOP_DecrJumpZero\sopcode\sback\sto\sits\sold\sbehavior\sof\salways\ndecrementing,\sexcept\stop\sthe\sdecrementing\swhen\sit\sreaches\sthe\slargest\snegative\nnumber.
D 2016-11-30T05:08:59.150
F Makefile.in 6b572807415d3f0a379cebc9461416d8df4a12c8
F Makefile.linux-gcc 7bc79876b875010e8c8f9502eb935ca92aa3c434
F Makefile.msc bb4d970894abbbe0e88d00aac29bd52af8bc95f4
@ -454,7 +454,7 @@ F src/update.c 1b8321100cac004f0721ab67b16909dd006e663c
F src/utf.c 699001c79f28e48e9bcdf8a463da029ea660540c
F src/util.c 3e2da6101888d073e79ecc6af5e0a2f70fa1e498
F src/vacuum.c 33c174b28886b2faf26e503b5a49a1c01a9b1c16
F src/vdbe.c 1802a10926b14de7065950d436e7ce418682faef
F src/vdbe.c 336a3e5696683a585e56bbbc4f05ce33957d28dd
F src/vdbe.h c044be7050ac6bf596eecc6ab159f5dbc020a3b7
F src/vdbeInt.h 9b498d3cb52dc2efb53571fb8ae8e14cf298ce84
F src/vdbeapi.c ea4e2dc2213cc6bd7bee375a29a9b51c31b93ae0
@ -1535,7 +1535,7 @@ F vsixtest/vsixtest.tcl 6a9a6ab600c25a91a7acc6293828957a386a8a93
F vsixtest/vsixtest.vcxproj.data 2ed517e100c66dc455b492e1a33350c1b20fbcdc
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1218005ab7b52ef45db1354d17fdd8a1a1af9854
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src/vdbe.c
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@ -6022,17 +6022,15 @@ case OP_IfNotZero: { /* jump, in1 */
/* Opcode: DecrJumpZero P1 P2 * * *
** Synopsis: if (--r[P1])==0 goto P2
**
** Register P1 must hold an integer. If the value in P1 is positive,
** decrement the value and jump to P2 if the new value is exactly zero.
** Register P1 must hold an integer. Decrement the value in P1
** and jump to P2 if the new value is exactly zero.
*/
case OP_DecrJumpZero: { /* jump, in1 */
pIn1 = &aMem[pOp->p1];
assert( pIn1->flags&MEM_Int );
if( pIn1->u.i>0 ){
pIn1->u.i--;
VdbeBranchTaken(pIn1->u.i==0, 2);
if( pIn1->u.i==0 ) goto jump_to_p2;
}
if( pIn1->u.i>SMALLEST_INT64 ) pIn1->u.i--;
VdbeBranchTaken(pIn1->u.i==0, 2);
if( pIn1->u.i==0 ) goto jump_to_p2;
break;
}