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Fix FOLD rule for BUFHDR append with intervening buffer use.

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Reported by XmiliaH.
This commit is contained in:
Mike Pall 2022-01-23 19:13:53 +01:00
parent c929efc039
commit 5935564c3b
1 changed files with 2 additions and 1 deletions
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3
src/lj_opt_fold.c
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@ -598,7 +598,8 @@ LJFOLDF(bufput_bufstr)
if (fleft->o == IR_BUFHDR && fleft->op2 == IRBUFHDR_RESET && if (fleft->o == IR_BUFHDR && fleft->op2 == IRBUFHDR_RESET &&
fleft->prev == hdr && fleft->prev == hdr &&
fleft->op1 == IR(hdr)->op1 && fleft->op1 == IR(hdr)->op1 &&
!(irt_isphi(fright->t) && IR(hdr)->prev)) { !(irt_isphi(fright->t) && IR(hdr)->prev) &&
(!LJ_HASBUFFER || J->chain[IR_CALLA] < hdr)) {
IRRef ref = fins->op1; IRRef ref = fins->op1;
IR(ref)->op2 = IRBUFHDR_APPEND; /* Modify BUFHDR. */ IR(ref)->op2 = IRBUFHDR_APPEND; /* Modify BUFHDR. */
IR(ref)->op1 = fright->op1; IR(ref)->op1 = fright->op1;