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author | Evan Cheng <evan.cheng@apple.com> | 2007-04-20 21:13:46 +0000 |
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committer | Evan Cheng <evan.cheng@apple.com> | 2007-04-20 21:13:46 +0000 |
commit | 3cafbf7e5fa13b303cc387a058a511ce517b5bd5 (patch) | |
tree | d4025c3de62d60e8ea421a1c48292bfb7faaa45c /utils | |
parent | a92d62c15fa2bf84453489716323b0159912c55d (diff) | |
download | external_llvm-3cafbf7e5fa13b303cc387a058a511ce517b5bd5.zip external_llvm-3cafbf7e5fa13b303cc387a058a511ce517b5bd5.tar.gz external_llvm-3cafbf7e5fa13b303cc387a058a511ce517b5bd5.tar.bz2 |
Add sub-registers sets.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36278 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'utils')
-rw-r--r-- | utils/TableGen/RegisterInfoEmitter.cpp | 67 |
1 files changed, 61 insertions, 6 deletions
diff --git a/utils/TableGen/RegisterInfoEmitter.cpp b/utils/TableGen/RegisterInfoEmitter.cpp index ac26837..22b3704 100644 --- a/utils/TableGen/RegisterInfoEmitter.cpp +++ b/utils/TableGen/RegisterInfoEmitter.cpp @@ -107,6 +107,27 @@ bool isSubRegisterClass(const CodeGenRegisterClass &RC, return true; } +static void addSubReg(Record *R, Record *S, + std::map<Record*, std::set<Record*> > &SubRegs, + std::map<Record*, std::set<Record*> > &Aliases, + RegisterInfoEmitter &RIE) { + if (R == S) { + cerr << "Error: recursive sub-register relationship between" + << " register " << RIE.getQualifiedName(R) + << " and its sub-registers?\n"; + abort(); + } + + if (!SubRegs[R].insert(S).second) + return; + Aliases[R].insert(S); + Aliases[S].insert(R); + if (SubRegs.count(S)) + for (std::set<Record*>::iterator I = SubRegs[S].begin(), + E = SubRegs[S].end(); I != E; ++I) + addSubReg(R, *I, SubRegs, Aliases, RIE); +} + // RegisterInfoEmitter::run - Main register file description emitter. // void RegisterInfoEmitter::run(std::ostream &OS) { @@ -273,7 +294,8 @@ void RegisterInfoEmitter::run(std::ostream &OS) { << "RegClass,\n"; OS << " };\n"; - // Emit register class aliases... + // Emit register sub-registers / aliases... + std::map<Record*, std::set<Record*> > RegisterSubRegs; std::map<Record*, std::set<Record*> > RegisterAliases; const std::vector<CodeGenRegister> &Regs = Target.getRegisters(); @@ -298,6 +320,20 @@ void RegisterInfoEmitter::run(std::ostream &OS) { } } + for (unsigned i = 0, e = Regs.size(); i != e; ++i) { + Record *R = Regs[i].TheDef; + std::vector<Record*> LI = Regs[i].TheDef->getValueAsListOfDefs("SubRegs"); + // Process sub-register set and add aliases information. + for (unsigned j = 0, e = LI.size(); j != e; ++j) { + Record *SubReg = LI[j]; + if (RegisterSubRegs[R].count(SubReg)) + cerr << "Warning: register " << getQualifiedName(SubReg) + << " specified as a sub-register of " << getQualifiedName(R) + << " multiple times!\n"; + addSubReg(R, SubReg, RegisterSubRegs, RegisterAliases, *this); + } + } + if (!RegisterAliases.empty()) OS << "\n\n // Register Alias Sets...\n"; @@ -314,12 +350,27 @@ void RegisterInfoEmitter::run(std::ostream &OS) { OS << "0 };\n"; } + if (!RegisterSubRegs.empty()) + OS << "\n\n // Register Sub-registers Sets...\n"; + + // Emit the empty sub-registers list + OS << " const unsigned Empty_SubRegsSet[] = { 0 };\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 = RegisterSubRegs.begin(), E = RegisterSubRegs.end(); I != E; ++I) { + OS << " const unsigned " << I->first->getName() << "_SubRegsSet[] = { "; + for (std::set<Record*>::iterator ASI = I->second.begin(), + E = I->second.end(); ASI != E; ++ASI) + OS << getQualifiedName(*ASI) << ", "; + OS << "0 };\n"; + } OS<<"\n const TargetRegisterDesc RegisterDescriptors[] = { // Descriptors\n"; - OS << " { \"NOREG\",\t0 },\n"; + OS << " { \"NOREG\",\t0,\t0 },\n"; - // Now that register alias sets have been emitted, emit the register - // descriptors now. + // Now that register alias and sub-registers sets have been emitted, emit the + // register descriptors now. const std::vector<CodeGenRegister> &Registers = Target.getRegisters(); for (unsigned i = 0, e = Registers.size(); i != e; ++i) { const CodeGenRegister &Reg = Registers[i]; @@ -330,9 +381,13 @@ void RegisterInfoEmitter::run(std::ostream &OS) { OS << Reg.getName(); OS << "\",\t"; if (RegisterAliases.count(Reg.TheDef)) - OS << Reg.getName() << "_AliasSet },\n"; + OS << Reg.getName() << "_AliasSet,\t"; + else + OS << "Empty_AliasSet,\t"; + if (RegisterSubRegs.count(Reg.TheDef)) + OS << Reg.getName() << "_SubRegsSet },\n"; else - OS << "Empty_AliasSet },\n"; + OS << "Empty_SubRegsSet },\n"; } OS << " };\n"; // End of register descriptors... OS << "}\n\n"; // End of anonymous namespace... |