PR middle-end/37608

	PR middle-end/37608
	* pa.md (call, call_value): Generate an rtx for register r4 and pass
	it to PIC call patterns.
	(call_symref_pic): Revise pattern to expose PIC register save.  Remove
	code generation and attributes from pattern.  Change peephole2 to split
	for noreturn case.  Revise split pattern for non noreturn case.
	(call_symref_64bit, call_reg_pic, call_reg_64bit, call_val_symref_pic,
	call_val_symref_64bit, call_val_reg_pic, call_val_reg_64bit): Likewise.
	* pa.c (attr_length_call): Simplify extraction of call rtx.  Add some
	asserts.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@141063 138bc75d-0d04-0410-961f-82ee72b054a4