[PATCH] D90608: [WebAssembly] Implement ref.null

[Andy Wingo via Phabricator via llvm-commits]

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This patch adds a new "heap type" operand kind to the WebAssembly MC
layer, used by ref.null.  Currently the possible values are "extern" and
"func"; when typed function references come, though, this operand may be
a type index.

Note that the "heap type" production is still known as "refedtype" in
the draft proposal; changing its name in the spec is
ongoing (https://github.com/WebAssembly/reference-types/issues/123).

The register form of ref.null is still unimplemented, so the DAG pattern
is empty.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D90608

Files:
  llvm/lib/Target/WebAssembly/AsmParser/WebAssemblyAsmParser.cpp
  llvm/lib/Target/WebAssembly/Disassembler/WebAssemblyDisassembler.cpp
  llvm/lib/Target/WebAssembly/MCTargetDesc/WebAssemblyInstPrinter.cpp
  llvm/lib/Target/WebAssembly/MCTargetDesc/WebAssemblyInstPrinter.h
  llvm/lib/Target/WebAssembly/MCTargetDesc/WebAssemblyMCCodeEmitter.cpp
  llvm/lib/Target/WebAssembly/MCTargetDesc/WebAssemblyMCTargetDesc.h
  llvm/lib/Target/WebAssembly/WebAssemblyInstrInfo.td
  llvm/lib/Target/WebAssembly/WebAssemblyInstrRef.td
  llvm/lib/Target/WebAssembly/WebAssemblyMCInstLower.cpp
  llvm/test/MC/WebAssembly/reference-types.s

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