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FFI: Optimize snapshots for cdata comparisons.

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This commit is contained in:
Mike Pall
2011-02-05 18:54:08 +01:00
parent da3f256a52
commit bf05209e14
4 changed files with 23 additions and 8 deletions
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10
src/lj_crecord.c
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@@ -13,6 +13,7 @@
#include "lj_err.h"
#include "lj_str.h"
#include "lj_tab.h"
#include "lj_frame.h"
#include "lj_ctype.h"
#include "lj_cparse.h"
#include "lj_cconv.h"
@@ -835,6 +836,15 @@ void LJ_FASTCALL recff_cdata_arith(jit_State *J, RecordFFData *rd)
err_type:
lj_trace_err(J, LJ_TRERR_BADTYPE);
}
/* Fixup cdata comparisons, too. Avoids some cdata escapes. */
if (J->postproc == LJ_POST_FIXGUARD && frame_iscont(J->L->base-1)) {
const BCIns *pc = frame_contpc(J->L->base-1) - 1;
if (bc_op(*pc) <= BC_ISNEP) {
setframe_pc(&J2G(J)->tmptv, pc);
J2G(J)->tmptv.u32.lo = ((tref_istrue(tr) ^ bc_op(*pc)) & 1);
J->postproc = LJ_POST_FIXCOMP;
}
}
J->base[0] = tr;
}
}