backport: ira.c (update_equiv_regs): Only call set_paradoxical_subreg for non-debug...

backport: ira.c (update_equiv_regs): Only call set_paradoxical_subreg for non-debug insns.

	Backport from mainline
	2013-09-08  Richard Sandiford  <rdsandiford@googlemail.com>

	* ira.c (update_equiv_regs): Only call set_paradoxical_subreg
	for non-debug insns.
	* lra.c (new_insn_reg): Take the containing insn as a parameter.
	Only modify lra_reg_info[].biggest_mode if it's non-debug insn.
	(collect_non_operand_hard_regs, add_regs_to_insn_regno_info): Update
	accordingly.

testsuite/ChangeLog:

	Backport from mainline
	2013-09-08  Richard Sandiford  <rdsandiford@googlemail.com>

	* g++.dg/debug/ra1.C: New test.

From-SVN: r220834