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Don't use STRREF for pointer diff in string.find().

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Thanks to Sergey Ostanevich and Vyacheslav Egorov.
This commit is contained in:
Mike Pall 2019-12-08 19:54:21 +01:00
parent 2a7c200dc2
commit 9600e4318e
1 changed files with 2 additions and 1 deletions
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3
src/lj_ffrecord.c
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@ -949,7 +949,8 @@ static void LJ_FASTCALL recff_string_find(jit_State *J, RecordFFData *rd)
str->len-(MSize)start, pat->len)) { str->len-(MSize)start, pat->len)) {
TRef pos; TRef pos;
emitir(IRTG(IR_NE, IRT_PGC), tr, trp0); emitir(IRTG(IR_NE, IRT_PGC), tr, trp0);
pos = emitir(IRTI(IR_SUB), tr, emitir(IRT(IR_STRREF, IRT_PGC), trstr, tr0)); /* Don't use STRREF of trstr. We need a pointer diff. */
pos = emitir(IRTI(IR_SUB), emitir(IRTI(IR_SUB), tr, trstr), lj_ir_kint(J, sizeof(GCstr)));
J->base[0] = emitir(IRTI(IR_ADD), pos, lj_ir_kint(J, 1)); J->base[0] = emitir(IRTI(IR_ADD), pos, lj_ir_kint(J, 1));
J->base[1] = emitir(IRTI(IR_ADD), pos, trplen); J->base[1] = emitir(IRTI(IR_ADD), pos, trplen);
rd->nres = 2; rd->nres = 2;