Add IR_XBAR, a barrier against XLOAD/XSTORE optimizations.

2011-02-07 21:59:25 +01:00
parent 0a50356b6f
commit 97d0874ff5
4 changed files with 6 additions and 2 deletions
--- a/src/lj_ir.h
+++ b/src/lj_ir.h
@@ -115,9 +115,10 @@
  _(CNEW,	AW, ref, ref) \
  _(CNEWI,	NW, ref, ref)  /* CSE is ok, not marked as A. */ \
  \
-  /* Write barriers. */ \
+  /* Barriers. */ \
  _(TBAR,	S , ref, ___) \
  _(OBAR,	S , ref, ref) \
+  _(XBAR,	S , ___, ___) \
  \
  /* Type conversions. */ \
  _(CONV,	N , ref, lit) \