<< " virtual int getDwarfRegNumFull(unsigned RegNum, "
<< "unsigned Flavour) const;\n"
<< " virtual int getDwarfRegNum(unsigned RegNum, bool isEH) const = 0;\n"
+ << " virtual bool needsStackRealignment(const MachineFunction &) const\n"
+ << " { return false; }\n"
<< " unsigned getSubReg(unsigned RegNo, unsigned Index) const;\n"
<< "};\n\n";
// Emit the register list now.
OS << " // " << Name
<< " Register Class Value Types...\n"
- << " static const MVT::ValueType " << Name
+ << " static const MVT " << Name
<< "[] = {\n ";
for (unsigned i = 0, e = RC.VTs.size(); i != e; ++i)
OS << getEnumName(RC.VTs[i]) << ", ";
OS << " };\n";
// Emit register sub-registers / super-registers, aliases...
- std::map<Record*, std::set<Record*> > RegisterImmSubRegs;
std::map<Record*, std::set<Record*> > RegisterSubRegs;
std::map<Record*, std::set<Record*> > RegisterSuperRegs;
std::map<Record*, std::set<Record*> > RegisterAliases;
cerr << "Warning: register " << getQualifiedName(SubReg)
<< " specified as a sub-register of " << getQualifiedName(R)
<< " multiple times!\n";
- RegisterImmSubRegs[R].insert(SubReg);
addSubSuperReg(R, SubReg, RegisterSubRegs, RegisterSuperRegs,
RegisterAliases);
}
}
+
+ // Print the SubregHashTable, a simple quadratically probed
+ // hash table for determining if a register is a subregister
+ // of another register.
+ unsigned NumSubRegs = 0;
+ std::map<Record*, unsigned> RegNo;
+ for (unsigned i = 0, e = Regs.size(); i != e; ++i) {
+ RegNo[Regs[i].TheDef] = i;
+ NumSubRegs += RegisterSubRegs[Regs[i].TheDef].size();
+ }
+
+ unsigned SubregHashTableSize = 2 * NextPowerOf2(2 * NumSubRegs);
+ unsigned* SubregHashTable = new unsigned[2 * SubregHashTableSize];
+ std::fill(SubregHashTable, SubregHashTable + 2 * SubregHashTableSize, ~0U);
+
+ unsigned hashMisses = 0;
+
+ for (unsigned i = 0, e = Regs.size(); i != e; ++i) {
+ Record* R = Regs[i].TheDef;
+ for (std::set<Record*>::iterator I = RegisterSubRegs[R].begin(),
+ E = RegisterSubRegs[R].end(); I != E; ++I) {
+ Record* RJ = *I;
+ // We have to increase the indices of both registers by one when
+ // computing the hash because, in the generated code, there
+ // will be an extra empty slot at register 0.
+ size_t index = ((i+1) + (RegNo[RJ]+1) * 37) & (SubregHashTableSize-1);
+ unsigned ProbeAmt = 2;
+ while (SubregHashTable[index*2] != ~0U &&
+ SubregHashTable[index*2+1] != ~0U) {
+ index = (index + ProbeAmt) & (SubregHashTableSize-1);
+ ProbeAmt += 2;
+
+ hashMisses++;
+ }
+
+ SubregHashTable[index*2] = i;
+ SubregHashTable[index*2+1] = RegNo[RJ];
+ }
+ }
+
+ OS << "\n\n // Number of hash collisions: " << hashMisses << "\n";
+
+ if (SubregHashTableSize) {
+ std::string Namespace = Regs[0].TheDef->getValueAsString("Namespace");
+
+ OS << " const unsigned SubregHashTable[] = { ";
+ for (unsigned i = 0; i < SubregHashTableSize - 1; ++i) {
+ if (i != 0)
+ // Insert spaces for nice formatting.
+ OS << " ";
+
+ if (SubregHashTable[2*i] != ~0U) {
+ OS << getQualifiedName(Regs[SubregHashTable[2*i]].TheDef) << ", "
+ << getQualifiedName(Regs[SubregHashTable[2*i+1]].TheDef) << ", \n";
+ } else {
+ OS << Namespace << "::NoRegister, " << Namespace << "::NoRegister, \n";
+ }
+ }
+
+ unsigned Idx = SubregHashTableSize*2-2;
+ if (SubregHashTable[Idx] != ~0U) {
+ OS << " "
+ << getQualifiedName(Regs[SubregHashTable[Idx]].TheDef) << ", "
+ << getQualifiedName(Regs[SubregHashTable[Idx+1]].TheDef) << " };\n";
+ } else {
+ OS << Namespace << "::NoRegister, " << Namespace << "::NoRegister };\n";
+ }
+
+ OS << " const unsigned SubregHashTableSize = "
+ << SubregHashTableSize << ";\n";
+ } else {
+ OS << " const unsigned SubregHashTable[] = { ~0U, ~0U };\n"
+ << " const unsigned SubregHashTableSize = 1;\n";
+ }
+
+ delete [] SubregHashTable;
if (!RegisterAliases.empty())
OS << "\n\n // Register Alias Sets...\n";
OS << "0 };\n";
}
- if (!RegisterImmSubRegs.empty())
- OS << "\n\n // Register Immediate Sub-registers Sets...\n";
-
- // Loop over all of the registers which have sub-registers, emitting the
- // sub-registers list to memory.
- for (std::map<Record*, std::set<Record*> >::iterator
- I = RegisterImmSubRegs.begin(), E = RegisterImmSubRegs.end();
- I != E; ++I) {
- OS << " const unsigned " << I->first->getName() << "_ImmSubRegsSet[] = { ";
- for (std::set<Record*>::iterator ASI = I->second.begin(),
- E = I->second.end(); ASI != E; ++ASI)
- OS << getQualifiedName(*ASI) << ", ";
- OS << "0 };\n";
- }
-
if (!RegisterSuperRegs.empty())
OS << "\n\n // Register Super-registers Sets...\n";
}
OS<<"\n const TargetRegisterDesc RegisterDescriptors[] = { // Descriptors\n";
- OS << " { \"NOREG\",\t\"NOREG\",\t0,\t0,\t0,\t0 },\n";
+ OS << " { \"NOREG\",\t\"NOREG\",\t0,\t0,\t0 },\n";
// Now that register alias and sub-registers sets have been emitted, emit the
// register descriptors now.
else
OS << Reg.getName();
OS << "\",\t\"";
- if (!Reg.TheDef->getValueAsString("Name").empty()) {
- OS << Reg.TheDef->getValueAsString("Name");
- } else {
- // Default to "name".
- if (!Reg.TheDef->getValueAsString("AsmName").empty())
- OS << Reg.TheDef->getValueAsString("AsmName");
- else
- OS << Reg.getName();
- }
- OS << "\",\t";
+ OS << Reg.getName() << "\",\t";
if (RegisterAliases.count(Reg.TheDef))
OS << Reg.getName() << "_AliasSet,\t";
else
OS << Reg.getName() << "_SubRegsSet,\t";
else
OS << "Empty_SubRegsSet,\t";
- if (RegisterImmSubRegs.count(Reg.TheDef))
- OS << Reg.getName() << "_ImmSubRegsSet,\t";
- else
- OS << "Empty_SubRegsSet,\t";
if (RegisterSuperRegs.count(Reg.TheDef))
OS << Reg.getName() << "_SuperRegsSet },\n";
else
<< "(int CallFrameSetupOpcode, int CallFrameDestroyOpcode)\n"
<< " : TargetRegisterInfo(RegisterDescriptors, " << Registers.size()+1
<< ", RegisterClasses, RegisterClasses+" << RegisterClasses.size() <<",\n "
- << " CallFrameSetupOpcode, CallFrameDestroyOpcode) {}\n\n";
+ << " CallFrameSetupOpcode, CallFrameDestroyOpcode,\n"
+ << " SubregHashTable, SubregHashTableSize) {\n"
+ << "}\n\n";
// Collect all information about dwarf register numbers
projects / oota-llvm.git / blobdiff