std::string ClassName = Target.getName() + "GenRegisterInfo";
+ // Emit the data table for getSubReg().
+ if (SubRegIndices.size()) {
+ OS << "static const unsigned short " << TargetName << "SubRegTable[]["
+ << SubRegIndices.size() << "] = {\n";
+ for (unsigned i = 0, e = Regs.size(); i != e; ++i) {
+ const CodeGenRegister::SubRegMap &SRM = Regs[i]->getSubRegs();
+ OS << " /* " << Regs[i]->TheDef->getName() << " */\n";
+ if (SRM.empty()) {
+ OS << " {0},\n";
+ continue;
+ }
+ OS << " {";
+ for (unsigned j = 0, je = SubRegIndices.size(); j != je; ++j) {
+ // FIXME: We really should keep this to 80 columns...
+ CodeGenRegister::SubRegMap::const_iterator SubReg =
+ SRM.find(SubRegIndices[j]);
+ if (SubReg != SRM.end())
+ OS << getQualifiedName(SubReg->second->TheDef);
+ else
+ OS << "0";
+ if (j != je - 1)
+ OS << ", ";
+ }
+ OS << "}" << (i != e ? "," : "") << "\n";
+ }
+ OS << "};\n\n";
+ }
+
// Emit the subregister + index mapping function based on the information
// calculated above.
OS << "unsigned " << ClassName
<< "::getSubReg(unsigned RegNo, unsigned Index) const {\n"
- << " switch (RegNo) {\n"
- << " default:\n return 0;\n";
- for (unsigned i = 0, e = Regs.size(); i != e; ++i) {
- const CodeGenRegister::SubRegMap &SRM = Regs[i]->getSubRegs();
- if (SRM.empty())
- continue;
- OS << " case " << getQualifiedName(Regs[i]->TheDef) << ":\n";
- OS << " switch (Index) {\n";
- OS << " default: return 0;\n";
- for (CodeGenRegister::SubRegMap::const_iterator ii = SRM.begin(),
- ie = SRM.end(); ii != ie; ++ii)
- OS << " case " << ii->first->getQualifiedName()
- << ": return " << getQualifiedName(ii->second->TheDef) << ";\n";
- OS << " };\n" << " break;\n";
- }
- OS << " };\n";
- OS << " return 0;\n";
- OS << "}\n\n";
+ << " assert(RegNo > 0 && Index > 0 && \"invalid subreg query!\");\n";
+ if (SubRegIndices.size())
+ OS << " return " << TargetName << "SubRegTable[RegNo - 1][Index - 1];\n"
+ << "}\n\n";
+ else
+ OS << " return 0;\n}\n\n";
OS << "unsigned " << ClassName
<< "::getSubRegIndex(unsigned RegNo, unsigned SubRegNo) const {\n"