Fix PR middle-end/47017

[Eric Botcazou]

This is another installment in the "RTL expansion of MEM_REF" series.  To 
recap, after the initial merge, Richard tweaked it to unbreak IA-64/HP-UX:
  http://gcc.gnu.org/ml/gcc-patches/2010-07/msg00514.html
which broke SPARC64/Linux.  So I reverted the above change and installed:
  http://gcc.gnu.org/ml/gcc-patches/2010-07/msg02144.html
instead, which pessimized x86.  So Jakub partially reverted it:
  http://gcc.gnu.org/ml/gcc-patches/2010-11/msg00551.html
which broke SPARC64/Linux again (in exactly the same way as before).

The attached patchlet fixes again SPARC64/Linux by turning the call to 
convert_memory_address_addr_space into a call to memory_address_addr_space, 
which additionally makes sure that the memory address is valid.

Bootstrapped/regtested on SPARC64 and AMD64 Linux, applied on the mainline.


2011-01-03  Eric Botcazou  <ebotcazou@adacore.com>

	PR middle-end/47017
	* expr.c (expand_expr_real_1) <MEM_REF>: Call memory_address_addr_space
	instead of convert_memory_address_addr_space on the base expression.


-- 
Eric Botcazou
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