* rs6000-tdep.c (struct rs6000_framedata): Add gpr_mask, used_bl,

	* rs6000-tdep.c (struct rs6000_framedata): Add gpr_mask, used_bl,
	lr_register.
	(rs6000_in_function_epilogue_p): Check for bctr.
	(skip_prologue): Initialize lr_register.  Set lr_reg to a register
	number.  Set gpr_mask and used_bl.  Continue scanning while some
	expected registers are not saved.  Set lr_register if LR is not
	stored.
	(rs6000_frame_cache): Handle gpr_mask and lr_register.

	* gdb.arch/powerpc-prologue.exp: Correct saved registers.