Currently the SBFM, UBFM and BFM instructions all use the attribute "bfm".

Currently the SBFM, UBFM and BFM instructions all use the attribute "bfm".

SBFM and UBFM include all shifts on AArch64, which are simpler than bitfield
insert.  Add a new bfx attribute for these instructions so that they can be
modelled more accurately in the future.  There is no difference in code
generation.

	* config/aarch64/aarch64.md (aarch64_ashl_sisd_or_int_<mode>3)
	Use bfx attribute.
	(aarch64_lshr_sisd_or_int_<mode>3): Likewise.
	(aarch64_ashr_sisd_or_int_<mode>3): Likewise.
	(<optab>si3_insn_uxtw): Likewise.
	(<optab><mode>3_insn): Likewise.
	(<ANY_EXTEND:optab><GPI:mode>_ashl<SHORT:mode>): Likewise.
	(zero_extend<GPI:mode>_lshr<SHORT:mode>): Likewise.
	(extend<GPI:mode>_ashr<SHORT:mode>): Likewise.
	(<optab><mode>): Likewise.
	(insv<mode>): Likewise.
	(andim_ashift<mode>_bfiz): Likewise.
	* config/aarch64/thunderx.md (thunderx_shift): Add bfx.
	* config/arm/cortex-a53.md (cortex_a53_alu_shift): Likewise.
	* config/arm/cortex-a57.md (cortex_a57_alu): Add bfx.
	* config/arm/exynos-m1.md (exynos_m1_alu): Add bfx.
	(exynos_m1_alu_p): Likewise.
	* config/arm/types.md: Add bfx.
	* config/arm/xgene1.md (xgene1_bfm): Add bfx.

From-SVN: r242384