[PATCH] D122714: [X86][AMX] Materialize undef or zero value to tilezero

[LuoYuanke via Phabricator via llvm-commits]

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The AMX combiner would store undef or zero to stack and invoke tileload
to load the data to tile register. To avoid the store/load, we can
materialzie undef or zero value to tilezero.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D122714

Files:
  llvm/lib/Target/X86/X86LowerAMXType.cpp
  llvm/test/CodeGen/X86/AMX/amx-combine-undef.ll
  llvm/test/CodeGen/X86/AMX/lat-combine-amx-bitcast.ll

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