Rewrite hppa profiling support.

Rewrite hppa profiling support.

	* config/pa/pa.c (override_options): Remove PIC profiling warning.
	(hp_profile_labelno): Delete.
	(hp_profile_label_rtx): Delete.
	(hp_profile_label_name): Delete.
	(pa_add_gc_roots): Remove reference to hp_profile_label_rtx.
	(output_function_prologue): Remove profiling code and all tests on
	profile_flag.  Move store of PIC_OFFSET_TABLE_REGNUM now that
	merge_sp_adjust_with_store can work for PIC and profiling.
	(hppa_expand_epilogue): Remove profile_flag test.
	(hppa_can_use_return_insn_p): Likewise.
	(hppa_init_pic_save): Emit before tail_recursion_reentry, and
	cater for PROFILE_HOOK.
	(hppa_profile_hook): New function.
	* config/pa/pa.h (FUNCTION_PROFILER): Now does nothing.
	(PROFILE_HOOK): Define.
	(hppa_profile_hook): Declare.
	(PROFILE_BEFORE_PROLOGUE): Delete.
	(ASM_OUTPUT_REG_PUSH): Delete.
	(ASM_OUTPUT_REG_POP): Delete.
	* config/pa/pa.md (call_profiler): Turn it into a call insn, and
	don't `use' r24.  Accept function name operand, and use this and a
	locally generated label to calculate pc-rel offset to func start.

From-SVN: r41038