rs6000-protos.h (rs6000_adjust_vec_address): New function that takes a vector memory...

rs6000-protos.h (rs6000_adjust_vec_address): New function that takes a vector memory address...

[gcc]
2016-07-30  Michael Meissner  <meissner@linux.vnet.ibm.com>

	* config/rs6000/rs6000-protos.h (rs6000_adjust_vec_address): New
	function that takes a vector memory address, a hard register, an
	element number and a temporary base register, and recreates an
	address that points to the appropriate element within the vector.
	* config/rs6000/rs6000.c (rs6000_adjust_vec_address): Likewise.
	(rs6000_split_vec_extract_var): Add support for the target of a
	vec_extract with variable element number being a scalar memory
	location.
	(rtx_is_swappable_p): VLSO insns (UNSPEC_VSX_VSLOW) are not
	swappable.
	* config/rs6000/vsx.md (vsx_extract_<mode>_load): Replace
	vsx_extract_<mode>_load insn with a new insn that optimizes
	storing either element to a memory location, using scratch
	registers to pick apart the vector and reconstruct the address.
	(vsx_extract_<P:mode>_<VSX_D:mode>_load): Likewise.
	(vsx_extract_<mode>_store): Rework alternatives to more correctly
	support Altivec registers.  Add support for ISA 3.0 Altivec d-form
	store instruction.
	(vsx_extract_<mode>_var): Add support for extracting a variable
	element number from memory.

[gcc/testsuite]
2016-07-30  Michael Meissner  <meissner@linux.vnet.ibm.com>

	* gcc.target/powerpc/vec-extract-2.c: New tests for vec_extract of
	vector double or vector long where the vector is in memory.
	* gcc.target/powerpc/vec-extract-3.c: Likewise.
	* gcc.target/powerpc/vec-extract-4.c: Likewise.

From-SVN: r238908