arm.c (use_return_insn): Check TARGET_APCS_FRAME.

arm.c (use_return_insn): Check TARGET_APCS_FRAME.

2008-03-11  Paul Brook  <paul@codesourcery.com>
	Vladimir Prus  <vladimir@codesourcery.com>

	* config/arm/arm.c (use_return_insn): Check TARGET_APCS_FRAME.
	(arm_compute_save_reg0_reg12_mask): Always
	check if register 11 must be saved.  Always safe hard frame pointer
	when frame_pointer_needeed.
	(arm_compute_save_reg_mask): Save IP and PC
	only with apcs frames.
	(arm_output_epilogue): Adjust Thumb2 codepath to
	be also invoked and work for ARM non-apcs frames.
	(arm_expand_prologue): Don't bother saving IP
	for non-apcs frame, since it's not clobbered by
	prologue code.  Implement non-apcs frame
	layout.

From-SVN: r133117