[all-commits] [llvm/llvm-project] e93181: [RISCV][VLOPT] Add vector fp-conversion instructio...

[Michael Maitland via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: e93181bf13b289823810d3b43bcc3c2df1eda70b
      https://github.com/llvm/llvm-project/commit/e93181bf13b289823810d3b43bcc3c2df1eda70b
  Author: Michael Maitland <michaeltmaitland at gmail.com>
  Date:   2025-01-08 (Wed, 08 Jan 2025)

  Changed paths:
    M llvm/lib/Target/RISCV/RISCVVLOptimizer.cpp
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-fp.ll
    M llvm/test/CodeGen/RISCV/rvv/fmaximum-vp.ll
    M llvm/test/CodeGen/RISCV/rvv/fminimum-vp.ll
    M llvm/test/CodeGen/RISCV/rvv/setcc-fp-vp.ll
    M llvm/test/CodeGen/RISCV/rvv/vfadd-vp.ll
    M llvm/test/CodeGen/RISCV/rvv/vfdiv-vp.ll
    M llvm/test/CodeGen/RISCV/rvv/vfmax-vp.ll
    M llvm/test/CodeGen/RISCV/rvv/vfmin-vp.ll
    M llvm/test/CodeGen/RISCV/rvv/vfmul-vp.ll
    M llvm/test/CodeGen/RISCV/rvv/vfptosi-vp-mask.ll
    M llvm/test/CodeGen/RISCV/rvv/vfptosi-vp.ll
    M llvm/test/CodeGen/RISCV/rvv/vfptoui-vp-mask.ll
    M llvm/test/CodeGen/RISCV/rvv/vfptoui-vp.ll
    M llvm/test/CodeGen/RISCV/rvv/vfsqrt-vp.ll
    M llvm/test/CodeGen/RISCV/rvv/vfsub-vp.ll
    M llvm/test/CodeGen/RISCV/rvv/vl-opt.mir

  Log Message:
  -----------
  [RISCV][VLOPT] Add vector fp-conversion instruction to isSupportedInstr (#122033)

When these instructions are marked nofpexcept, we can optimize them.
There are some added toggles in the output, likley because other
noexcept fp instructions are not part of isSupportedInstr yet. We may
want to avoid marking an instruction as isSupported in the future if any
of its FP users are missing nofpexcept to avoid added toggles. However,
we seem to get some GPRs back as a result of this change, which may
outweigh the cost of avoiding extra toggles.

The plan is to follow this patch up with added support for more FP
instructions in the same way. The instructions in this patch are a
natural starting point because they allow us to test with integer
instructions which have good support already.



To unsubscribe from these emails, change your notification settings at https://github.com/llvm/llvm-project/settings/notifications