This patch looks fine to me.
2011/4/13 Yiran Wang <yiran.w...@gmail.com>
> 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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--
Regards,
Lai Jian-Xin
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