[PATCH] Fix ICE in get_memory_rtx

[Eric Botcazou]

Hi,

Ada is unique in that it can generate aggregate bit-fields (fields with 
aggregate types and DECL_BIT_FIELD set) and even variable-sized aggregate 
bit-fields.  In this latter case, they are aligned to a byte-boundary (the 
middle-end doesn't support byte-unaligned objects with variable size) and 
occupy an integral number of bytes (same reason) so block-copy operations
can be invoked on them.

That's the case for the attached testcase on SPARC/Solaris.  The problem is 
that get_memory_rtx stops on any field with DECL_BIT_FIELD set on it.

Tested on i586-suse-linux and sparc-sun-solaris2.8, OK for mainline?


2008-06-09  Eric Botcazou  <ebotcazou@adacore.com>
            Olivier Hainque  <hainque@adacore.com>

	* builtins.c (get_memory_rtx): Accept BLKmode and BLKmode-like
	bitfields in COMPONENT_REFs.  Use DECL_SIZE_UNIT for the size.


2008-06-09  Eric Botcazou  <ebotcazou@adacore.com>

        * gnat.dg/specs/varsize_copy.ad[sb]: New test.


-- 
Eric Botcazou
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