[all-commits] [llvm/llvm-project] bb51c5: [SDPatternMatch] Add m_Poison matcher (#144860)

[Ming Yan via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: bb51c5d4b85a655e8c90247a6678e507402703a4
      https://github.com/llvm/llvm-project/commit/bb51c5d4b85a655e8c90247a6678e507402703a4
  Author: Ming Yan <99472920+NexMing at users.noreply.github.com>
  Date:   2025-06-20 (Fri, 20 Jun 2025)

  Changed paths:
    M llvm/include/llvm/CodeGen/SDPatternMatch.h
    M llvm/unittests/CodeGen/SelectionDAGPatternMatchTest.cpp

  Log Message:
  -----------
  [SDPatternMatch] Add m_Poison matcher (#144860)

Add SDPatternMatch matcher and unit test coverage for ISD::POISON opcode

e.g.
```
m_InsertElt(m_Poison(), m_Value(), m_Zero())
```



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