2010-08-20  Joseph Myers  <joseph@codesourcery.com>

	gcc/
	* doc/tm.texi.in (PIC_OFFSET_TABLE_REG_CALL_CLOBBERED): Document to
	be zero or nonzero.
	* doc/tm.texi: Regenerate.
	* defaults.h (PIC_OFFSET_TABLE_REG_CALL_CLOBBERED): Define.
	* df-scan.c (df_get_exit_block_use_set), reginfo.c
	(init_reg_sets_1), rtlanal.c (rtx_unstable_p, rtx_varies_p):
	Handle new PIC_OFFSET_TABLE_REG_CALL_CLOBBERED semantics.
	* config/ia64/ia64.h (PIC_OFFSET_TABLE_REG_CALL_CLOBBERED): Define
	to 1.

From-SVN: r163399