DrSocalkwe3n/luajit
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Compile string.reverse(), string.lower(), string.upper().

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This commit is contained in:
Mike Pall
2013-04-26 00:32:08 +02:00
parent 61cb25b0ca
commit b6adfff8f4
5 changed files with 42 additions and 8 deletions
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26
src/lj_opt_fold.c
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@@ -19,6 +19,7 @@
#include "lj_tab.h"
#include "lj_ir.h"
#include "lj_jit.h"
#include "lj_ircall.h"
#include "lj_iropt.h"
#include "lj_trace.h"
#if LJ_HASFFI
@@ -570,7 +571,8 @@ LJFOLDF(bufput_kgc)
LJFOLD(BUFSTR any any)
LJFOLDF(bufstr_kfold_cse)
{
lua_assert(fright->o == IR_BUFHDR || fright->o == IR_BUFPUT);
lua_assert(fright->o == IR_BUFHDR || fright->o == IR_BUFPUT ||
fright->o == IR_CALLS);
if (LJ_LIKELY(J->flags & JIT_F_OPT_FOLD)) {
if (fright->o == IR_BUFHDR) { /* No put operations? */
if (!(fright->op2 & IRBUFHDR_APPEND)) { /* Empty buffer? */
@@ -579,7 +581,7 @@ LJFOLDF(bufstr_kfold_cse)
}
fins->op2 = fright->prev; /* Relies on checks in bufput_append. */
return CSEFOLD;
} else {
} else if (fright->o == IR_BUFPUT) {
IRIns *irb = IR(fright->op1);
if (irb->o == IR_BUFHDR && !(irb->op2 & IRBUFHDR_APPEND)) {
lj_ir_rollback(J, fins->op1); /* Eliminate the current chain. */
@@ -616,6 +618,26 @@ LJFOLDF(bufstr_kfold_cse)
return EMITFOLD; /* No CSE possible. */
}
LJFOLD(CALLS CARG IRCALL_lj_buf_putstr_reverse)
LJFOLD(CALLS CARG IRCALL_lj_buf_putstr_upper)
LJFOLD(CALLS CARG IRCALL_lj_buf_putstr_lower)
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);
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;
return RETRYFOLD;
}
return EMITFOLD; /* This is a store and always emitted. */
}
/* -- Constant folding of pointer arithmetic ------------------------------ */
LJFOLD(ADD KGC KINT)