[llvm-commits] [llvm] r81741 - /llvm/trunk/utils/TableGen/AsmWriterEmitter.cpp

[Chris Lattner]

Author: lattner
Date: Sun Sep 13 20:26:18 2009
New Revision: 81741

URL: http://llvm.org/viewvc/llvm-project?rev=81741&view=rev
Log:
emit the register table as a massive string to avoid relocations.

Modified:
    llvm/trunk/utils/TableGen/AsmWriterEmitter.cpp

Modified: llvm/trunk/utils/TableGen/AsmWriterEmitter.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/utils/TableGen/AsmWriterEmitter.cpp?rev=81741&r1=81740&r2=81741&view=diff

==============================================================================
--- llvm/trunk/utils/TableGen/AsmWriterEmitter.cpp (original)
+++ llvm/trunk/utils/TableGen/AsmWriterEmitter.cpp Sun Sep 13 20:26:18 2009
@@ -767,6 +767,7 @@
   std::string ClassName = AsmWriter->getValueAsString("AsmWriterClassName");
   const std::vector<CodeGenRegister> &Registers = Target.getRegisters();
   
+  StringToOffsetTable StringTable;
   O <<
   "\n\n/// getRegisterName - This method is automatically generated by tblgen\n"
   "/// from the register set description.  This returns the assembler name\n"
@@ -776,19 +777,29 @@
   << "  assert(RegNo && RegNo < " << (Registers.size()+1)
   << " && \"Invalid register number!\");\n"
   << "\n"
-  << "  static const char *const RegAsmNames[] = {\n";
+  << "  static const unsigned RegAsmOffset[] = {\n    ";
   for (unsigned i = 0, e = Registers.size(); i != e; ++i) {
     const CodeGenRegister &Reg = Registers[i];
 
     std::string AsmName = Reg.TheDef->getValueAsString("AsmName");
     if (AsmName.empty())
       AsmName = Reg.getName();
-    O << "    \"" << AsmName << "\",\n";
+    
+    
+    if ((i % 16) == 0)
+      O << "\n    ";
+    
+    O << StringTable.GetOrAddStringOffset(AsmName) << ", ";
   }
-  O << "    0\n"
+  O << "0\n"
     << "  };\n"
-    << "\n"
-    << "  return RegAsmNames[RegNo-1];\n"
+    << "\n";
+  
+  O << "  const char *AsmStrs =\n";
+  StringTable.EmitString(O);
+  O << ";\n";
+  
+  O << "  return AsmStrs+RegAsmOffset[RegNo-1];\n"
     << "}\n";
 }