[all-commits] [llvm/llvm-project] a6c3cc: [RISCV] Be more strict about LUI+ADDI macrofusion ...

[Craig Topper via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: a6c3ccd476d43305fc91f56c8066f913110ce078
      https://github.com/llvm/llvm-project/commit/a6c3ccd476d43305fc91f56c8066f913110ce078
  Author: Craig Topper <craig.topper at sifive.com>
  Date:   2022-08-21 (Sun, 21 Aug 2022)

  Changed paths:
    M llvm/lib/Target/RISCV/RISCVMacroFusion.cpp

  Log Message:
  -----------
  [RISCV] Be more strict about LUI+ADDI macrofusion pre-RA.

Don't macrofuse if the LUI has more than 1 user. That will likely
require the LUI to have a different destination register post-RA.
LUI+ADDI can only be fused if they write the same register.