55efb413f8
* rtlanal.c (rtx_unstable_p): The pic register is stable (within one function) and the actual rtx should be used when checking the registers. (rtx_addr_can_trap_p): Pic memory addresses can't trap. * alias.c (true_dependence, write_dependence_p): Fix bug in previous patch. * i386.c (ix86_GOT_alias_set): New. (legitimize_pic_address): Use it. * rtlanal.c (rtx_unstable_p): An unchanging MEM is only stable if its address is stable. (rtx_varies_p): An unchanging MEM can't vary if its address doesn't vary. From-SVN: r35900
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