[all-commits] [llvm/llvm-project] 3b16d8: [SystemZ] Don't crash on undef source in shouldCoa...

[Jonas Paulsson via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 3b16d8c8eaf24edf572d92d375852daad457d71b
      https://github.com/llvm/llvm-project/commit/3b16d8c8eaf24edf572d92d375852daad457d71b
  Author: Jonas Paulsson <paulson1 at linux.ibm.com>
  Date:   2024-01-15 (Mon, 15 Jan 2024)

  Changed paths:
    M llvm/lib/Target/SystemZ/SystemZRegisterInfo.cpp
    A llvm/test/CodeGen/SystemZ/regcoal_undefsrc.mir

  Log Message:
  -----------
  [SystemZ] Don't crash on undef source in shouldCoalesce() (#78056)

SystemZRegisterInfo::shouldCoalesce() has to be able to handle an undef
source.