re PR target/81833 (PowerPC: VSX: Miscompiles ffmpeg's scalarproduct_int16_vsx at...

re PR target/81833 (PowerPC: VSX: Miscompiles ffmpeg's scalarproduct_int16_vsx at -O1)

[gcc]

2017-09-05  Bill Schmidt  <wschmidt@linux.vnet.ibm.com>

	PR target/81833
	* config/rs6000/altivec.md (altivec_vsum2sws): Convert from a
	define_insn to a define_expand.
	(altivec_vsum2sws_direct): New define_insn.
	(altivec_vsumsws): Convert from a define_insn to a define_expand.

[gcc/testsuite]

2017-09-05  Bill Schmidt  <wschmidt@linux.vnet.ibm.com>

	PR target/81833
	* gcc.target/powerpc/pr81833-1.c: New file.
	* gcc.target/powerpc/pr81833-2.c: New file.

From-SVN: r251723