[committed 0/6] amdgcn: Add V32, V16, V8, V4, and V2 vectors

[Andrew Stubbs <ams@codesourcery.com>]

This patch series adds additional vector sizes for the amdgcn backend.

The hardware supports any arbitrary vector length up to 64-lanes via
masking, but GCC cannot (yet) make full use of them due to middle-end
limitations.  Adding smaller "virtual" vector sizes increases the
complexity of the backend a little, but opens up optimization
opportunities for the current middle-end implementation somewhat. In
particular, it enables many more cases of SLP optimization.

The patchset gives aproximately 100 addtional test PASS and a few extra
FAIL.  However, the failures are not new issues, but rather existing
problems that did not show up because the code did not previously
vectorize.  Expanding the testcase to allow 64-lane vectors shows the
same problems there.

I shall backport these patches to the OG12 branch shortly.

Andrew

Andrew Stubbs (6):
  amdgcn: add multiple vector sizes
  amdgcn: Resolve insn conditions at compile time
  amdgcn: Add vec_extract for partial vectors
  amdgcn: vec_init for multiple vector sizes
  amdgcn: Add vector integer negate insn
  amdgcn: vector testsuite tweaks

 gcc/config/gcn/gcn-modes.def                  |   82 ++
 gcc/config/gcn/gcn-protos.h                   |   24 +-
 gcc/config/gcn/gcn-valu.md                    |  399 +++++--
 gcc/config/gcn/gcn.cc                         | 1063 +++++++++++------
 gcc/config/gcn/gcn.h                          |   24 +
 gcc/testsuite/gcc.dg/pr104464.c               |    2 +
 gcc/testsuite/gcc.dg/signbit-2.c              |    5 +-
 gcc/testsuite/gcc.dg/signbit-5.c              |    1 +
 gcc/testsuite/gcc.dg/vect/bb-slp-68.c         |    5 +-
 gcc/testsuite/gcc.dg/vect/bb-slp-cond-1.c     |    3 +-
 .../gcc.dg/vect/bb-slp-subgroups-3.c          |    5 +-
 .../gcc.dg/vect/no-vfa-vect-depend-2.c        |    3 +-
 gcc/testsuite/gcc.dg/vect/pr33953.c           |    3 +-
 gcc/testsuite/gcc.dg/vect/pr65947-12.c        |    3 +-
 gcc/testsuite/gcc.dg/vect/pr65947-13.c        |    3 +-
 gcc/testsuite/gcc.dg/vect/pr80631-2.c         |    3 +-
 gcc/testsuite/gcc.dg/vect/slp-reduc-4.c       |    3 +-
 .../gcc.dg/vect/trapv-vect-reduc-4.c          |    3 +-
 gcc/testsuite/lib/target-supports.exp         |    3 +-
 19 files changed, 1183 insertions(+), 454 deletions(-)

-- 
2.37.0