rs6000.c (rs6000_hard_regno_mode_ok): If ISA 3.0...

rs6000.c (rs6000_hard_regno_mode_ok): If ISA 3.0...

[gcc]
2016-11-10  Michael Meissner  <meissner@linux.vnet.ibm.com>

	* config/rs6000/rs6000.c (rs6000_hard_regno_mode_ok): If ISA 3.0,
	enable HImode and QImode to go in vector registers by default if
	the -mvsx-small-integer option is enabled.
	(rs6000_secondary_reload_simple_move): Likewise.
	(rs6000_preferred_reload_class): Don't force integer constants to
	be loaded into vector registers that we can easily make into
	memory (or being created in the GPRs and moved over with direct
	move).
	* config/rs6000/vsx.md (UNSPEC_P9_MEMORY): Delete, no longer
	used.
	(vsx_extract_<mode>): Rework V4SImode, V8HImode, and V16QImode
	vector extraction on ISA 3.0 when the scalar integer can be
	allocated in vector registers.  Generate the VEC_SELECT directy,
	and don't use UNSPEC's to avoid having the scalar type in a vector
	register.  Make the expander target registers, and let the
	combiner fold in results storing to memory, if the machine
	supports stores.
	(vsx_extract_<mode>_di): Likewise.
	(vsx_extract_<mode>_p9): Likewise.
	(vsx_extract_<mode>_di_p9): Likewise.
	(vsx_extract_<mode>_store_p9): Likewise.
	(vsx_extract_si): Likewise.
	(vsx_extract_<mode>_p8): Likewise.
	(p9_lxsi<wd>zx): Delete, no longer used.
	(p9_stxsi<wd>x): Likewise.
	* config/rs6000/rs6000.md (INT_ISA3): New mode iterator for
	integers in vector registers for ISA 3.0.
	(QHI): Update comment.
	(zero_extendqi<mode>2): Add support for ISA 3.0 scalar load or
	vector extract instructions in sign/zero extend.
	(zero_extendhi<mode>): Likewise.
	(extendqi<mode>): Likewise.
	(extendhi<mode>2): Likewise.
	(HImode splitter for load/sign extend in vector register):
	Likewise.
	(float<QHI:mode><FP_ISA3:mode>2): Eliminate old method of
	optimizing floating point conversions to/from small data types and
	rewrite it to support QImode/HImode being allowed in vector
	registers on ISA 3.0.
	(float<QHI:mode><FP_ISA3:mode>2_internal): Likewise.
	(floatuns<QHI:mode><FP_ISA3:mode>2): Likewise.
	(floatuns<QHI:mode><FP_ISA3:mode>2_internal): Likewise.
	(fix_trunc<SFDF:mode><QHI:mode>2): Likewise.
	(fix_trunc<SFDF:mode><QHI:mode>2_internal): Likewise.
	(fixuns_trunc<SFDF:mode><QHI:mode>2): Likewise.
	(fixuns_trunc<SFDF:mode><QHI:mode>2_internal): Likewise.
	VSPLITISW on ISA 2.07.
	(movhi_internal): Combine movhi_internal and movqi_internal into
	one mov<mode>_internal with an iterator.  Add support for QImode
	and HImode being allowed in vector registers.  Make large number
	of attributes and constraints easier to read.
	(movqi_internal): Likewise.
	(mov<mode>_internal): Likewise.
	(movdi_internal64): Fix constraint to allow loading -16..15 with
	VSPLITISW on ISA 2.07.
	(integer XXSPLTIB splitter): Add support for QI, HI, and SImode as
	well as DImode.

[gcc/testsuite]
2016-11-10  Michael Meissner  <meissner@linux.vnet.ibm.com>

	* gcc.target/powerpc/vsx-qimode.c: New test for QImode, HImode
	being allowed in vector registers.
	* gcc.target/powerpc/vsx-qimode2.c: Likewise.
	* gcc.target/powerpc/vsx-qimode3.c: Likewise.
	* gcc.target/powerpc/vsx-himode.c: Likewise.
	* gcc.target/powerpc/vsx-himode2.c: Likewise.
	* gcc.target/powerpc/vsx-himode3.c: Likewise.
	* gcc.target/powerpc/p9-extract-1.c: Change MFVSRD to just MFVSR,
	to allow matching MFVSRD or MFVSRW.

From-SVN: r242048