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Maintain chain invariant in DCE.

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Thanks to Peter Cawley. #1094
This commit is contained in:
Mike Pall 2023-09-22 21:04:22 +02:00
parent aa6b15c1a8
commit f72c19e482
1 changed files with 1 additions and 1 deletions
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2
src/lj_opt_dce.c
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@ -44,12 +44,12 @@ static void dce_propagate(jit_State *J)
IRIns *ir = IR(ins);
if (irt_ismarked(ir->t)) {
irt_clearmark(ir->t);
pchain[ir->o] = &ir->prev;
} else if (!ir_sideeff(ir)) {
*pchain[ir->o] = ir->prev; /* Reroute original instruction chain. */
lj_ir_nop(ir);
continue;
}
pchain[ir->o] = &ir->prev;
if (ir->op1 >= REF_FIRST) irt_setmark(IR(ir->op1)->t);
if (ir->op2 >= REF_FIRST) irt_setmark(IR(ir->op2)->t);
}