Hi All,
Could a gatekeeper please review this patch?
It is about to find out constant branches. If the compare instruction
has an operator in memory, it is not possible to evaluate it at
compile time.
Best Regards,
Yiran
Index: osprey/be/cg/cflow.cxx
===================================================================
--- osprey/be/cg/cflow.cxx (revision 1251)
+++ osprey/be/cg/cflow.cxx (revision 1252)
@@ -2697,6 +2697,14 @@
tn1 = BBINFO_condval1(bp);
tn2 = BBINFO_condval2(bp);
compare_op = BBINFO_compare_op(bp);
+
+#ifdef TARG_X8664
+ /* load execute TOP access memory, so is not possible to be evaluated
+ * at compile time. */
+ if (TOP_is_load_exe(OP_code(compare_op)))
+ return FALSE;
+#endif
+
#ifdef TARG_LOONGSON
/* for loongson, there are some branch instructions with only one
operand, such as:
"mipsbgez",
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