[llvm-commits] CVS: llvm/utils/TableGen/RegisterInfoEmitter.cpp
Nate Begeman
natebegeman at mac.com
Mon Apr 30 22:57:37 PDT 2007
Changes in directory llvm/utils/TableGen:
RegisterInfoEmitter.cpp updated: 1.52 -> 1.53
---
Log message:
llvm bug #1350, parts 1, 2, and 3.
---
Diffs of the changes: (+36 -0)
RegisterInfoEmitter.cpp | 36 ++++++++++++++++++++++++++++++++++++
1 files changed, 36 insertions(+)
Index: llvm/utils/TableGen/RegisterInfoEmitter.cpp
diff -u llvm/utils/TableGen/RegisterInfoEmitter.cpp:1.52 llvm/utils/TableGen/RegisterInfoEmitter.cpp:1.53
--- llvm/utils/TableGen/RegisterInfoEmitter.cpp:1.52 Fri Apr 20 19:55:29 2007
+++ llvm/utils/TableGen/RegisterInfoEmitter.cpp Tue May 1 00:57:02 2007
@@ -61,6 +61,7 @@
<< " " << ClassName
<< "(int CallFrameSetupOpcode = -1, int CallFrameDestroyOpcode = -1);\n"
<< " int getDwarfRegNum(unsigned RegNum) const;\n"
+ << " unsigned getSubReg(unsigned RegNo, unsigned Index) const;\n"
<< "};\n\n";
const std::vector<CodeGenRegisterClass> &RegisterClasses =
@@ -322,6 +323,7 @@
std::map<Record*, std::set<Record*> > RegisterSubRegs;
std::map<Record*, std::set<Record*> > RegisterSuperRegs;
std::map<Record*, std::set<Record*> > RegisterAliases;
+ std::map<Record*, std::vector<std::pair<int, Record*> > > SubRegVectors;
const std::vector<CodeGenRegister> &Regs = Target.getRegisters();
for (unsigned i = 0, e = Regs.size(); i != e; ++i) {
@@ -441,6 +443,40 @@
std::string ClassName = Target.getName() + "GenRegisterInfo";
+ // Calculate the mapping of subregister+index pairs to physical registers.
+ std::vector<Record*> SubRegs = Records.getAllDerivedDefinitions("SubRegSet");
+ for (unsigned i = 0, e = SubRegs.size(); i != e; ++i) {
+ int subRegIndex = SubRegs[i]->getValueAsInt("index");
+ std::vector<Record*> From = SubRegs[i]->getValueAsListOfDefs("From");
+ std::vector<Record*> To = SubRegs[i]->getValueAsListOfDefs("To");
+
+ assert((From.size() == To.size()) &&
+ "SubRegSet has mismatched from/to size");
+
+ // For each entry in from/to vectors, insert the to register at index
+ for (unsigned ii = 0, ee = From.size(); ii != ee; ++ii)
+ SubRegVectors[From[ii]].push_back(std::make_pair(subRegIndex, To[ii]));
+ }
+
+ // 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: abort(); break;\n";
+ for (std::map<Record*, std::vector<std::pair<int, Record*> > >::iterator
+ I = SubRegVectors.begin(), E = SubRegVectors.end(); I != E; ++I) {
+ OS << " case " << getQualifiedName(I->first) << ":\n";
+ OS << " switch (Index) {\n";
+ OS << " default: abort(); break;\n";
+ for (unsigned i = 0, e = I->second.size(); i != e; ++i)
+ OS << " case " << (I->second)[i].first << ": return "
+ << getQualifiedName((I->second)[i].second) << ";\n";
+ OS << " }; break;\n";
+ }
+ OS << " };\n";
+ OS << "}\n\n";
+
// Emit the constructor of the class...
OS << ClassName << "::" << ClassName
<< "(int CallFrameSetupOpcode, int CallFrameDestroyOpcode)\n"
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