Fix PR target/46685

[Eric Botcazou]

This fixes the recently introduced stack alignment failures with -fpic, on the 
SPARC side only.  The PA side will need another fix.  This is mostly Jakub's 
work, with an additional patchlet for sparc_file_end.

Tested on SPARC/Solaris and SPARC/Linux, applied on the mainline.


2010-11-02  Eric Botcazou  <ebotcazou@adacore.com>

	PR target/46685
	* config/sparc/sparc.c (can_use_mov_pic_label_ref): New predicate.
	(sparc_expand_move): Call it to decide whether to emit the special
	mov{si,di}_pic_label_ref patterns.
	(sparc_legitimize_pic_address): Call it to decide whether to emit
	the regular PIC sequence for labels.  Fix long line.
	(sparc_file_end): Set is_thunk for the PIC helper.


2010-11-02  Eric Botcazou  <ebotcazou@adacore.com>

	* gcc.dg/pr46685.c: New test.


-- 
Eric Botcazou
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