Method IdInstructions

source/diff/diff.cpp:197–224

// Mappings from ids to instructions and metadata, for a single module's ids.
struct IdInstructions {
  IdInstructions(const opt::Module* module)
      : inst_map_(module->IdBound(), nullptr),
        name_map_(module->IdBound()),
        decoration_map_(module->IdBound()),
        forward_pointer_map_(module->IdBound()) {
    // Map ids from all sections to instructions that define them.
    MapIdsToInstruction(module->ext_inst_imports());
    MapIdsToInstruction(module->debugs1());
    MapIdsToInstruction(module->debugs2());
    MapIdsToInstruction(module->debugs3());
    MapIdsToInstruction(module->ext_inst_debuginfo());
    MapIdsToInstruction(module->types_values());
    for (const opt::Function& function : *module) {
      function.ForEachInst(
          [this](const opt::Instruction* inst) {
            if (inst->HasResultId()) {
              MapIdToInstruction(inst->result_id(), inst);
            }
          },
          true, true);
    }

    // Gather decorations applied to ids that could be useful in matching them
    // between src and dst modules.
    MapIdsToInfos(module->debugs2());
    MapIdsToInfos(module->annotations());
    MapIdsToInfos(module->types_values());
  }

  void MapIdToInstruction(uint32_t id, const opt::Instruction* inst);