On Tue, Oct 11, 2022 at 1:03 PM Andrew Stubbs <a...@codesourcery.com> wrote: > > 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.
I suppose until you change the related_vector_mode hook the PR107096 issue will not hit you but at least it's then latent ... > > 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 >
