emit-rtl.c (gen_rtx_REG): Check that the PIC_OFFSET_TABLE_REGNUM is a fixed register before returning...

	* emit-rtl.c (gen_rtx_REG): Check that the PIC_OFFSET_TABLE_REGNUM
	is a fixed register before returning pic_offset_table_rtx.
	* loop.c (scan_loop): Don't hoist insns that set pic_offset_table_rtx
	when PIC_OFFSET_TABLE_REG_CALL_CLOBBERED is defined.

From-SVN: r49304