[all-commits] [llvm/llvm-project] ab393c: [RISCV] Take known minimum vlen into account when ...

[Craig Topper via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: ab393cee9dffdb225b94badcb9c21f80b156b74b
      https://github.com/llvm/llvm-project/commit/ab393cee9dffdb225b94badcb9c21f80b156b74b
  Author: Craig Topper <craig.topper at sifive.com>
  Date:   2024-09-30 (Mon, 30 Sep 2024)

  Changed paths:
    M llvm/lib/Target/RISCV/RISCVFrameLowering.cpp
    M llvm/test/CodeGen/RISCV/early-clobber-tied-def-subreg-liveness.ll
    M llvm/test/CodeGen/RISCV/rvv-cfi-info.ll
    M llvm/test/CodeGen/RISCV/rvv/access-fixed-objects-by-rvv.ll
    M llvm/test/CodeGen/RISCV/rvv/addi-scalable-offset.mir
    M llvm/test/CodeGen/RISCV/rvv/alloca-load-store-scalable-array.ll
    M llvm/test/CodeGen/RISCV/rvv/allocate-lmul-2-4-8.ll
    M llvm/test/CodeGen/RISCV/rvv/callee-saved-regs.ll
    M llvm/test/CodeGen/RISCV/rvv/emergency-slot.mir
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-fp-buildvec-bf16.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-fp-buildvec.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-interleaved-access.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-llrint.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-vfwmaccbf16.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-vpscatter.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/fpclamptosat_vec.ll
    M llvm/test/CodeGen/RISCV/rvv/frm-insert.ll
    M llvm/test/CodeGen/RISCV/rvv/no-reserved-frame.ll
    M llvm/test/CodeGen/RISCV/rvv/rv32-spill-vector.ll
    M llvm/test/CodeGen/RISCV/rvv/rv32-spill-zvlsseg.ll
    M llvm/test/CodeGen/RISCV/rvv/rv64-spill-vector.ll
    M llvm/test/CodeGen/RISCV/rvv/rv64-spill-zvlsseg.ll
    M llvm/test/CodeGen/RISCV/rvv/scalar-stack-align.ll
    M llvm/test/CodeGen/RISCV/rvv/stack-folding.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/vfma-vp.ll
    M llvm/test/CodeGen/RISCV/rvv/vfmul-vp.ll
    M llvm/test/CodeGen/RISCV/rvv/vfsub-vp.ll
    M llvm/test/CodeGen/RISCV/rvv/vpscatter-sdnode.ll
    M llvm/test/CodeGen/RISCV/rvv/vxrm-insert.ll
    M llvm/test/CodeGen/RISCV/rvv/wrong-stack-offset-for-rvv-object.mir

  Log Message:
  -----------
  [RISCV] Take known minimum vlen into account when calculating alignment padding in assignRVVStackObjectOffsets. (#110312)

If we know vlen is a multiple of 16, we don't need any alignment
padding.

I wrote the code so that it would generate the minimum amount of padding
if the stack align was 32 or larger or if RVVBitsPerBlock was smaller
than half the stack alignment.



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