rs6000.c (rs6000_expand_vector_set): Add support for using xxinsertw and vinsert...

rs6000.c (rs6000_expand_vector_set): Add support for using xxinsertw and vinsert{b,h} on ISA 3.0.

[gcc]
2016-11-14  Michael Meissner  <meissner@linux.vnet.ibm.com>

	* config/rs6000/rs6000.c (rs6000_expand_vector_set): Add support
	for using xxinsertw and vinsert{b,h} on ISA 3.0.

	* config/rs6000/vsx.md (vsx_extract_<mode>): Update comment.
	(vsx_set_<mode>_p9): New insn to generate xxinsertw and
	vinsert{b,h} on ISA 3.0.

[gcc/testsuite]
2016-11-14  Michael Meissner  <meissner@linux.vnet.ibm.com>

	* gcc.target/powerpc/vec-set-int.c: New test.
	* gcc.target/powerpc/vec-set-short.c: Likesie.
	* gcc.target/powerpc/vec-set-char.c: Likewise.

From-SVN: r242397