[PATCH v1 0/4] RISC-V: Combine vec_duplicate + vdiv.vv to vdiv.vx on GR2VR cost

[pan2 . li]

From: Pan Li <pan2...@intel.com>

This patch would like to introduce the combine of vec_dup + vdiv.vv into
vdiv.vx on the cost value of GR2VR.  The late-combine will take place if
the cost of GR2VR is zero, or reject the combine if non-zero like 1, 15
in test.  There will be two cases for the combine:

Case 0:
 |   ...
 |   vmv.v.x
 | L1:
 |   vdiv.vv
 |   J L1
 |   ...

Case 1:
 |   ...
 | L1:
 |   vmv.v.x
 |   vdiv.vv
 |   J L1
 |   ...

Both will be combined to below if the cost of GR2VR is zero.
 |   ...
 | L1:
 |   vdiv.vx
 |   J L1
 |   ...

The below test suites are passed for this patch series.
* The rv64gcv fully regression test.

Pan Li (4):
  RISC-V: Combine vec_duplicate + vidv.vv to vdiv.vx on GR2VR cost
  RISC-V: Add test for vec_duplicate + vdiv.vv combine case 0 with GR2VR cost 
0, 2 and 15
  RISC-V: Add test for vec_duplicate + vdiv.vv combine case 1 with GR2VR cost 
0, 1 and 2
  RISC-V: Reconcile the existing test for vdiv.vx combine

 gcc/config/riscv/riscv-v.cc                   |   1 +
 gcc/config/riscv/riscv.cc                     |  38 +++-
 gcc/config/riscv/vector-iterators.md          |   2 +-
 .../rvv/autovec/binop/vdiv-rv32gcv-nofm.c     |   8 +-
 .../riscv/rvv/autovec/binop/vdiv-rv32gcv.c    |   4 +-
 .../rvv/autovec/binop/vdiv-rv64gcv-nofm.c     |   8 +-
 .../riscv/rvv/autovec/binop/vdiv-rv64gcv.c    |   4 +-
 .../riscv/rvv/autovec/vx_vf/vx-1-i16.c        |   2 +
 .../riscv/rvv/autovec/vx_vf/vx-1-i32.c        |   2 +
 .../riscv/rvv/autovec/vx_vf/vx-1-i64.c        |   2 +
 .../riscv/rvv/autovec/vx_vf/vx-1-i8.c         |   2 +
 .../riscv/rvv/autovec/vx_vf/vx-2-i16.c        |   2 +
 .../riscv/rvv/autovec/vx_vf/vx-2-i32.c        |   2 +
 .../riscv/rvv/autovec/vx_vf/vx-2-i64.c        |   2 +
 .../riscv/rvv/autovec/vx_vf/vx-2-i8.c         |   2 +
 .../riscv/rvv/autovec/vx_vf/vx-3-i16.c        |   2 +
 .../riscv/rvv/autovec/vx_vf/vx-3-i32.c        |   2 +
 .../riscv/rvv/autovec/vx_vf/vx-3-i64.c        |   2 +
 .../riscv/rvv/autovec/vx_vf/vx-3-i8.c         |   2 +
 .../riscv/rvv/autovec/vx_vf/vx-4-i16.c        |   2 +
 .../riscv/rvv/autovec/vx_vf/vx-4-i32.c        |   2 +
 .../riscv/rvv/autovec/vx_vf/vx-4-i64.c        |   2 +
 .../riscv/rvv/autovec/vx_vf/vx-4-i8.c         |   2 +
 .../riscv/rvv/autovec/vx_vf/vx-5-i16.c        |   2 +
 .../riscv/rvv/autovec/vx_vf/vx-5-i32.c        |   2 +
 .../riscv/rvv/autovec/vx_vf/vx-5-i64.c        |   2 +
 .../riscv/rvv/autovec/vx_vf/vx-5-i8.c         |   2 +
 .../riscv/rvv/autovec/vx_vf/vx-6-i16.c        |   2 +
 .../riscv/rvv/autovec/vx_vf/vx-6-i32.c        |   2 +
 .../riscv/rvv/autovec/vx_vf/vx-6-i64.c        |   2 +
 .../riscv/rvv/autovec/vx_vf/vx-6-i8.c         |   2 +
 .../riscv/rvv/autovec/vx_vf/vx_binary_data.h  | 196 ++++++++++++++++++
 .../rvv/autovec/vx_vf/vx_vdiv-run-1-i16.c     |  15 ++
 .../rvv/autovec/vx_vf/vx_vdiv-run-1-i32.c     |  15 ++
 .../rvv/autovec/vx_vf/vx_vdiv-run-1-i64.c     |  15 ++
 .../rvv/autovec/vx_vf/vx_vdiv-run-1-i8.c      |  15 ++
 36 files changed, 349 insertions(+), 20 deletions(-)
 create mode 100644 
gcc/testsuite/gcc.target/riscv/rvv/autovec/vx_vf/vx_vdiv-run-1-i16.c
 create mode 100644 
gcc/testsuite/gcc.target/riscv/rvv/autovec/vx_vf/vx_vdiv-run-1-i32.c
 create mode 100644 
gcc/testsuite/gcc.target/riscv/rvv/autovec/vx_vf/vx_vdiv-run-1-i64.c
 create mode 100644 
gcc/testsuite/gcc.target/riscv/rvv/autovec/vx_vf/vx_vdiv-run-1-i8.c

-- 
2.43.0