Function GetNSDIVersion

source/val/validate_extensions.cpp:117–125

Returns the declared NSDI version from the OpExtInstImport referenced by |inst|. Returns 0 if not a NonSemantic.Shader.DebugInfo import.

// Returns the declared NSDI version from the OpExtInstImport referenced by
// |inst|.  Returns 0 if not a NonSemantic.Shader.DebugInfo import.
uint32_t GetNSDIVersion(const ValidationState_t& _, const Instruction* inst) {
  const auto* import_inst = _.FindDef(inst->word(3));
  if (!import_inst) return 0;
  const std::string name = import_inst->GetOperandAs<std::string>(1);
  const char kPrefix[] = "NonSemantic.Shader.DebugInfo.";
  if (name.find(kPrefix) != 0) return 0;
  return static_cast<uint32_t>(
      std::strtoul(name.c_str() + sizeof(kPrefix) - 1, nullptr, 10));
}

// Check that the operand of a debug info instruction |inst| at |word_index|
// is a result id of an instruction with |expected_opcode|.