[all-commits] [llvm/llvm-project] 46d1f3: [RISCV][InsertSETVTLI] Handle large immediates in ...

[Philip Reames via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 46d1f308824909b550b042c926a9c1e974cf2454
      https://github.com/llvm/llvm-project/commit/46d1f308824909b550b042c926a9c1e974cf2454
  Author: Philip Reames <preames at rivosinc.com>
  Date:   2023-12-14 (Thu, 14 Dec 2023)

  Changed paths:
    M llvm/lib/Target/RISCV/RISCVInsertVSETVLI.cpp
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-insert.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-masked-gather.ll

  Log Message:
  -----------
  [RISCV][InsertSETVTLI] Handle large immediates in backwards walk (#75409)

When doing our backwards walk, we were not handling the case where the
AVL was defined by a register whose definition was an ADDI xN, x0,
<imm>. Doing so (as we already do in the forward pass) allows us to
prune a few more transitions.