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Emit the asm writer's mnemonic table with SequenceToOffsetTable.

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This way we can get AVX v-prefixed instructions tail merged with the normal insns.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153869 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Benjamin Kramer 2012-04-02 09:13:46 +00:00
parent c97ef618d2
commit 94338594ef
1 changed files with 21 additions and 6 deletions
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27
utils/TableGen/AsmWriterEmitter.cpp
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@ -278,12 +278,27 @@ void AsmWriterEmitter::EmitPrintInstruction(raw_ostream &O) {
CGIAWIMap.insert(std::make_pair(Instructions[i].CGI, &Instructions[i]));
// Build an aggregate string, and build a table of offsets into it.
StringToOffsetTable StringTable;
SequenceToOffsetTable<std::string> StringTable;
/// OpcodeInfo - This encodes the index of the string to use for the first
/// chunk of the output as well as indices used for operand printing.
std::vector<unsigned> OpcodeInfo;
// Add all strings to the string table upfront so it can generate an optimized
// representation.
for (unsigned i = 0, e = NumberedInstructions.size(); i != e; ++i) {
AsmWriterInst *AWI = CGIAWIMap[NumberedInstructions[i]];
if (AWI != 0 &&
AWI->Operands[0].OperandType == AsmWriterOperand::isLiteralTextOperand &&
!AWI->Operands[0].Str.empty()) {
std::string Str = AWI->Operands[0].Str;
UnescapeString(Str);
StringTable.add(Str);
}
}
StringTable.layout();
unsigned MaxStringIdx = 0;
for (unsigned i = 0, e = NumberedInstructions.size(); i != e; ++i) {
AsmWriterInst *AWI = CGIAWIMap[NumberedInstructions[i]];
@ -295,11 +310,11 @@ void AsmWriterEmitter::EmitPrintInstruction(raw_ostream &O) {
AsmWriterOperand::isLiteralTextOperand ||
AWI->Operands[0].Str.empty()) {
// Something handled by the asmwriter printer, but with no leading string.
Idx = StringTable.GetOrAddStringOffset("");
Idx = StringTable.get("");
} else {
std::string Str = AWI->Operands[0].Str;
UnescapeString(Str);
Idx = StringTable.GetOrAddStringOffset(Str);
Idx = StringTable.get(Str);
MaxStringIdx = std::max(MaxStringIdx, Idx);
// Nuke the string from the operand list. It is now handled!
@ -374,9 +389,9 @@ void AsmWriterEmitter::EmitPrintInstruction(raw_ostream &O) {
O << " };\n\n";
// Emit the string itself.
O << " const char *const AsmStrs = \n";
StringTable.EmitString(O);
O << ";\n\n";
O << " const char AsmStrs[] = {\n";
StringTable.emit(O, printChar);
O << " };\n\n";
O << " O << \"\\t\";\n\n";