[all-commits] [llvm/llvm-project] be7ef6: [MachineLICM] Recognize registers clobbered at EH ...

[Ulrich Weigand via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: be7ef6c52b1942a738a2cab4304bb204f28dc00b
      https://github.com/llvm/llvm-project/commit/be7ef6c52b1942a738a2cab4304bb204f28dc00b
  Author: Ulrich Weigand <ulrich.weigand at de.ibm.com>
  Date:   2025-04-25 (Fri, 25 Apr 2025)

  Changed paths:
    M llvm/lib/CodeGen/MachineLICM.cpp
    A llvm/test/CodeGen/SystemZ/pr122315.ll

  Log Message:
  -----------
  [MachineLICM] Recognize registers clobbered at EH landing pad entry (#122446)

EH landing pad entry implicitly clobbers target-specific exception
pointer and exception selector registers. The post-RA MachineLICM pass
needs to take these into account when deciding whether to hoist an
instruction out of the loop that initializes one of these registers.

Fixes: https://github.com/llvm/llvm-project/issues/122315



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