Add FOLD rule for FLOAT->NUM->FLOAT conversions.

2011-04-05 16:31:48 +02:00
parent 48438b9e13
commit 3acd4892e9
2 changed files with 14 additions and 3 deletions
--- a/src/lj_opt_fold.c
+++ b/src/lj_opt_fold.c
@@ -914,6 +914,15 @@ LJFOLDF(simplify_conv_int_i64)
  return NEXTFOLD;
 }

+LJFOLD(CONV CONV IRCONV_NUM_FLOAT)  /* _NUM */
+LJFOLDF(simplify_conv_flt_num)
+{
+  PHIBARRIER(fleft);
+  if ((fleft->op2 & IRCONV_SRCMASK) == IRT_NUM)
+    return fleft->op1;
+  return NEXTFOLD;
+}
+
 /* Shortcut TOBIT + IRT_NUM <- IRT_INT/IRT_U32 conversion. */
 LJFOLD(TOBIT CONV KNUM)
 LJFOLDF(simplify_tobit_conv)