[PATCH] D76339: [GlobalISel] Port some basic undef combines from DAGCombiner.cpp

[Matt Arsenault via Phabricator via llvm-commits]

arsenm added inline comments.


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Comment at: llvm/include/llvm/Target/GlobalISel/Combine.td:174
+def trivial_combines : GICombineGroup<[copy_prop, mul_to_shl, undef_combines]>;
 def all_combines : GICombineGroup<[trivial_combines, ptr_add_immed_chain,
     combines_for_extload, combine_indexed_load_store]>;
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Should add to all_combines


CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D76339/new/

https://reviews.llvm.org/D76339