pa.c (emit_hpdiv_const): Return reg is r2 for 64-bit millicode.

pa.c (emit_hpdiv_const): Return reg is r2 for 64-bit millicode.

	* config/pa/pa.c (emit_hpdiv_const): Return reg is r2 for 64-bit
	millicode.
	(insn_refs_are_delayed): Correct comment.
	* config/pa/pa.h (INSN_REFERENCES_ARE_DELAYED): Likewise.
	* config/pa/pa.md (mulsi3): If TARGET_64BIT, clobber r2
	instead of r31.  Make associated insn !TARGET_64BIT, and
	provide an additional 64-bit insn that clobbers r2.
	(divsi3): Likewise.
	(udivsi3): Likewise.
	(modsi3): Likewise.
	(umodsi3): Likewise.

From-SVN: r44003