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Compile string.rep().

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This commit is contained in:
Mike Pall
2013-04-26 22:55:24 +02:00
parent 9b8db403f2
commit 068783bf23
4 changed files with 55 additions and 16 deletions
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40
src/lj_opt_fold.c
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@@ -596,18 +596,13 @@ LJFOLDF(bufstr_kfold_cse)
if (LJ_LIKELY(J->flags & JIT_F_OPT_CSE)) {
IRRef ref = J->chain[IR_BUFSTR];
while (ref) {
IRRef last = fins->op1;
IRIns *irs = IR(ref), *ira = fleft, *irb = IR(irs->op1);
while (ira->o == irb->o && ira->op2 == irb->op2) {
if (ira->o == IR_BUFHDR && !(ira->op2 & IRBUFHDR_APPEND)) {
lua_assert(ira->o == IR_BUFHDR || ira->o == IR_BUFPUT ||
ira->o == IR_CALLL || ira->o == IR_CARG);
if (ira->o == IR_BUFHDR && !(ira->op2 & IRBUFHDR_APPEND))
return ref; /* CSE succeeded. */
} else if (ira->o == IR_CALLL) {
ira = IR(ira->op1); irb = IR(irb->op1);
lua_assert(ira->o == IR_CARG && irb->o == IR_CARG);
if (ira->op2 != irb->op2) break;
}
last = ira->op1;
ira = IR(last);
ira = IR(ira->op1);
irb = IR(irb->op1);
}
ref = irs->prev;
@@ -623,17 +618,32 @@ LJFOLDF(bufput_kfold_op)
{
if (irref_isk(fleft->op2)) {
const CCallInfo *ci = &lj_ir_callinfo[fins->op2];
SBuf *sb = &J2G(J)->tmpbuf;
setsbufL(sb, J->L);
lj_buf_reset(sb);
SBuf *sb = lj_buf_tmp_(J->L);
sb = ((SBuf * (LJ_FASTCALL *)(SBuf *, GCstr *))ci->func)(sb,
ir_kstr(IR(fleft->op2)));
fins->op2 = lj_ir_kstr(J, lj_buf_tostr(sb));
fins->op1 = fleft->op1;
fins->o = IR_BUFPUT;
fins->op1 = fleft->op1;
fins->op2 = lj_ir_kstr(J, lj_buf_tostr(sb));
return RETRYFOLD;
}
return EMITFOLD; /* This is a store and always emitted. */
return EMITFOLD; /* Always emit, CSE later. */
}
LJFOLD(CALLL CARG IRCALL_lj_buf_putstr_rep)
LJFOLDF(bufput_kfold_rep)
{
if (irref_isk(fleft->op2)) {
IRIns *irc = IR(fleft->op1);
if (irref_isk(irc->op2)) {
SBuf *sb = lj_buf_tmp_(J->L);
sb = lj_buf_putstr_rep(sb, ir_kstr(IR(irc->op2)), IR(fleft->op2)->i);
fins->o = IR_BUFPUT;
fins->op1 = irc->op1;
fins->op2 = lj_ir_kstr(J, lj_buf_tostr(sb));
return RETRYFOLD;
}
}
return EMITFOLD; /* Always emit, CSE later. */
}
/* -- Constant folding of pointer arithmetic ------------------------------ */