re PR middle-end/70689 (ICE on valid code at -O1 in 32-bit mode on x86_64-linux-gnu in curr_insn_transform, at lra-constraints.c:3564)

2016-04-18  Vladimir Makarov  <vmakarov@redhat.com>

	PR middle-end/70689
	* lra-constraints.c (equiv_substition_p): New.
	(process_alt_operands): Use it.
	(swap_operands): Swap it.
	(curr_insn_transform): Update it.

2016-04-18  Vladimir Makarov  <vmakarov@redhat.com>

	PR middle-end/70689
	* testsuite/gcc.target/i386/pr70689.c: New.

From-SVN: r235184