[PATCH][AArch64][committed] Add comment on why plus_constant is not used in aarch64_legitimize_reload_address

[Kyrill Tkachov]

Hi all,

I've committed this patch as obvious. It adds a comment in 
aarch64_legitimize_reload_address explaining that we need the RTL structure to 
be preserved before push_reload and using plus_constant would fold that, causing 
ICEs.

Thanks,
Kyrill

[gcc/]
2013-11-07  Kyrylo Tkachov  <kyrylo.tkachov@arm.com>

     * config/aarch64/aarch64.c (aarch64_legitimize_reload_address):
     Explain why plus_constant is not used.
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