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Consistently use IRT_NIL for IR_TBAR.

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The IR_TBAR emitted as part of table indexing uses IRT_NIL, whereas the IR_TBAR emitted as part of setmetatable currently uses IRT_TAB. This is currently fairly harmless, but one option for addressing #1086 involves CSE actually looking at the type of instructions, at which point inconsistent types would prevent CSE.
This commit is contained in:
Peter Cawley 2024-08-21 16:41:37 +01:00
parent 304da39cc5
commit b1b944f52f
1 changed files with 1 additions and 1 deletions
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src/lj_ffrecord.c
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@ -259,7 +259,7 @@ static void LJ_FASTCALL recff_setmetatable(jit_State *J, RecordFFData *rd)
mtref = tref_isnil(mt) ? lj_ir_knull(J, IRT_TAB) : mt;
emitir(IRT(IR_FSTORE, IRT_TAB), fref, mtref);
if (!tref_isnil(mt))
emitir(IRT(IR_TBAR, IRT_TAB), tr, 0);
emitir(IRT(IR_TBAR, IRT_NIL), tr, 0);
J->base[0] = tr;
J->needsnap = 1;
} /* else: Interpreter will throw. */