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emit the register table as a massive string to avoid relocations.

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llvm-svn: 81741
This commit is contained in:
Chris Lattner 2009-09-14 01:26:18 +00:00
parent d823d97b3a
commit c4a64a08ec
1 changed files with 16 additions and 5 deletions
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21
utils/TableGen/AsmWriterEmitter.cpp
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@ -767,6 +767,7 @@ void AsmWriterEmitter::EmitGetRegisterName(raw_ostream &O) {
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 @@ void AsmWriterEmitter::EmitGetRegisterName(raw_ostream &O) {
<< " 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";
}