[PATCH] D126771: [fastalloc] Support allocate specific register class in fastalloc.

[LuoYuanke via Phabricator via llvm-commits]

LuoYuanke created this revision.
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The base RA support infrastructure that only allow a specific register
class be allocated in RA pss. Since greedy RA, basic RA derived from
base RA, they all allow allocating specific register class. Fast RA
doesn't support allocating register for specific register class. This
patch is to enable ShouldAllocateClass in fast RA, so that it can
support allocating register for specific register class. AMX register
allocation require such feature, so this patch demo the AMX register
allocation as an example.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D126771

Files:
  llvm/lib/CodeGen/RegAllocFast.cpp
  llvm/lib/Target/X86/X86RegisterInfo.cpp
  llvm/lib/Target/X86/X86RegisterInfo.h
  llvm/lib/Target/X86/X86TargetMachine.cpp
  llvm/test/CodeGen/X86/O0-pipeline.ll
  llvm/test/DebugInfo/MIR/InstrRef/survives-livedebugvars.mir

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