* rs6000-tdep.c (rs6000_skip_prologue): Use skip_prologue_using_sal.

	* rs6000-tdep.c (rs6000_skip_prologue): Use skip_prologue_using_sal.
	(rs6000_in_function_epilogue_p): Use extract_unsigned_integer.
	(refine_prologue_limit): Delete.
	(skip_prologue): Don't call it.  Use extract_unsigned_integer.
	Assume lim_pc is set.  Correct check for incomplete prologues.
	Do not skip clobbers of the frame pointer.
	* symtab.c (skip_prologue_using_sal): Fail if there is only one
	sal.

	* gdb.arch/powerpc-prologue.c (optimized_1_marker, gdb2029_marker)
	(optimized_1): New.
	(main): Call optimized_1.
	(gdb2029): Correct typos.  Call gdb2029_marker.
	* gdb.arch/powerpc-prologue.exp: Run new test.  Use a breakpoint
	for gdb2029.