[all-commits] [llvm/llvm-project] 181894: [SystemZ] Add check for INIT_UNDEF in getInstSizeI...

[tltao via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 18189430abbbc13b055d029683413e992a3eac2d
      https://github.com/llvm/llvm-project/commit/18189430abbbc13b055d029683413e992a3eac2d
  Author: tltao <tony.le.tao at gmail.com>
  Date:   2025-04-10 (Thu, 10 Apr 2025)

  Changed paths:
    M llvm/lib/Target/SystemZ/SystemZLongBranch.cpp
    A llvm/test/CodeGen/SystemZ/init-undef.mir

  Log Message:
  -----------
  [SystemZ] Add check for INIT_UNDEF in getInstSizeInBytes (#134661)

Due to some optimization changes, INIT_UNDEF is making its way to
`getInstSizeInBytes` in `llvm/lib/Target/SystemZ/SystemZLongBranch.cpp`
but we do not have an exception there in the assert. Since INIT_UNDEF is
described as being similar to IMPLICIT_DEF and there is a check for
IMPLICIT_DEF, it seems logical to also add a check for INIT_UNDEF.

---------

Co-authored-by: Tony Tao <tonytao at ca.ibm.com>



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