1 files changed, 8 insertions, 16 deletions

diff --git a/utils/TableGen/RegisterInfoEmitter.cpp b/utils/TableGen/RegisterInfoEmitter.cpp
index 6f06705243e9..96399a4d0525 100644
--- a/utils/TableGen/RegisterInfoEmitter.cpp
+++ b/utils/TableGen/RegisterInfoEmitter.cpp
@@ -25,7 +25,7 @@ using namespace llvm;
 
 // runEnums - Print out enum values for all of the registers.
 void RegisterInfoEmitter::runEnums(raw_ostream &OS) {
-  CodeGenTarget Target;
+  CodeGenTarget Target(Records);
   const std::vector<CodeGenRegister> &Registers = Target.getRegisters();
 
   std::string Namespace = Registers[0].TheDef->getValueAsString("Namespace");
@@ -63,7 +63,7 @@ void RegisterInfoEmitter::runEnums(raw_ostream &OS) {
 
 void RegisterInfoEmitter::runHeader(raw_ostream &OS) {
   EmitSourceFileHeader("Register Information Header Fragment", OS);
-  CodeGenTarget Target;
+  CodeGenTarget Target(Records);
   const std::string &TargetName = Target.getName();
   std::string ClassName = TargetName + "GenRegisterInfo";
 
@@ -333,7 +333,7 @@ public:
 // RegisterInfoEmitter::run - Main register file description emitter.
 //
 void RegisterInfoEmitter::run(raw_ostream &OS) {
-  CodeGenTarget Target;
+  CodeGenTarget Target(Records);
   EmitSourceFileHeader("Register Information Source Fragment", OS);
 
   OS << "namespace llvm {\n\n";
@@ -777,17 +777,13 @@ void RegisterInfoEmitter::run(raw_ostream &OS) {
   delete [] AliasesHashTable;
 
   if (!RegisterAliases.empty())
-    OS << "\n\n  // Register Alias Sets...\n";
+    OS << "\n\n  // Register Overlap Lists...\n";
 
-  // Emit the empty alias list
-  OS << "  const unsigned Empty_AliasSet[] = { 0 };\n";
-  // Loop over all of the registers which have aliases, emitting the alias list
-  // to memory.
+  // Emit an overlap list for all registers.
   for (std::map<Record*, std::set<Record*>, LessRecord >::iterator
          I = RegisterAliases.begin(), E = RegisterAliases.end(); I != E; ++I) {
-    if (I->second.empty())
-      continue;
-    OS << "  const unsigned " << I->first->getName() << "_AliasSet[] = { ";
+    OS << "  const unsigned " << I->first->getName() << "_Overlaps[] = { "
+       << getQualifiedName(I->first) << ", ";
     for (std::set<Record*>::iterator ASI = I->second.begin(),
            E = I->second.end(); ASI != E; ++ASI)
       OS << getQualifiedName(*ASI) << ", ";
@@ -849,11 +845,7 @@ void RegisterInfoEmitter::run(raw_ostream &OS) {
   for (unsigned i = 0, e = Regs.size(); i != e; ++i) {
     const CodeGenRegister &Reg = Regs[i];
     OS << "    { \"";
-    OS << Reg.getName() << "\",\t";
-    if (!RegisterAliases[Reg.TheDef].empty())
-      OS << Reg.getName() << "_AliasSet,\t";
-    else
-      OS << "Empty_AliasSet,\t";
+    OS << Reg.getName() << "\",\t" << Reg.getName() << "_Overlaps,\t";
     if (!RegisterSubRegs[Reg.TheDef].empty())
       OS << Reg.getName() << "_SubRegsSet,\t";
     else