i386.opt (mmitigate-rop): Mark as deprecated.

i386.opt (mmitigate-rop): Mark as deprecated.

	* config/i386/i386.opt (mmitigate-rop): Mark as deprecated.
	* doc/invoke.texi (mmitigate-rop): Remove.
	* config/i386/i386.c: Do not include "regrename.h".
	(ix86_rop_should_change_byte_p, reg_encoded_number)
	(ix86_get_modrm_for_rop, set_rop_modrm_reg_bits, ix86_mitigate_rop):
	Remove.
	(ix86_reorg): Remove call to ix86_mitigate_rop.
	* config/i386/i386.md (attr "modrm_class"): Remove.
	(cmp<mode>_ccno_1, mov<mode>_xor, movstrict<mode>_xor)
	(x86_mov<mode>cc_0_m1. x86_mov<mode>cc_0_m1_se)
	(x86_mov<mode>cc_0_m1_neg): Remove modrm_class attribute override.

testsuite/Changelog:

	* gcc.target/i386/rop1.c: Remove.
	* gcc.target/i386/pr83554 (dg-options): Remove -mmitigate-rop.

From-SVN: r263572