[all-commits] [llvm/llvm-project] 107c3a: [WebAssembly] Implement ref.null

[Andy Wingo via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: 107c3a12d627f12a23f138a00d6aabe9de7402f7
      https://github.com/llvm/llvm-project/commit/107c3a12d627f12a23f138a00d6aabe9de7402f7
  Author: Andy Wingo <wingo at igalia.com>
  Date:   2020-11-03 (Tue, 03 Nov 2020)

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

  Log Message:
  -----------
  [WebAssembly] Implement ref.null

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 untested.

Differential Revision: https://reviews.llvm.org/D90608