[all-commits] [llvm/llvm-project] a2d717: [RISCV] Prevent copying dummy_reg_pair_with_x0 in ...

[Craig Topper via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: a2d717d303fb48f468ea366fd8cdee5e8f951b21
      https://github.com/llvm/llvm-project/commit/a2d717d303fb48f468ea366fd8cdee5e8f951b21
  Author: Craig Topper <craig.topper at sifive.com>
  Date:   2025-05-23 (Fri, 23 May 2025)

  Changed paths:
    M llvm/lib/Target/RISCV/RISCVMakeCompressible.cpp
    M llvm/test/CodeGen/RISCV/make-compressible-zilsd.mir

  Log Message:
  -----------
  [RISCV] Prevent copying dummy_reg_pair_with_x0 in RISCVMakeCompressible. (#141261)

dummy_reg_pair_with_x0 is the odd subregister of X0_Pair, but it isn't a
real register. We need to copy X0 instead since X0_Pair reads as 0.



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