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Eliminate asm parser's dependency on TargetMachine:

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- Each target asm parser now creates its own MCSubtatgetInfo (if needed).
- Changed AssemblerPredicate to take subtarget features which tablegen uses
  to generate asm matcher subtarget feature queries. e.g.
  "ModeThumb,FeatureThumb2" is translated to
  "(Bits & ModeThumb) != 0 && (Bits & FeatureThumb2) != 0".


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@134678 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Evan Cheng
2011-07-08 01:53:10 +00:00
parent 1fb0955cab
commit ebdeeab812
49 changed files with 318 additions and 297 deletions
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39
utils/TableGen/AsmMatcherEmitter.cpp
View File

@@ -1817,15 +1817,43 @@ static void EmitComputeAvailableFeatures(AsmMatcherInfo &Info,
Info.AsmParser->getValueAsString("AsmParserClassName");
OS << "unsigned " << Info.Target.getName() << ClassName << "::\n"
<< "ComputeAvailableFeatures(const " << Info.Target.getName()
<< "Subtarget *Subtarget) const {\n";
<< "ComputeAvailableFeatures(uint64_t FB) const {\n";
OS << " unsigned Features = 0;\n";
for (std::map<Record*, SubtargetFeatureInfo*>::const_iterator
it = Info.SubtargetFeatures.begin(),
ie = Info.SubtargetFeatures.end(); it != ie; ++it) {
SubtargetFeatureInfo &SFI = *it->second;
OS << " if (" << SFI.TheDef->getValueAsString("CondString")
<< ")\n";
OS << " if (";
StringRef Conds = SFI.TheDef->getValueAsString("AssemblerCondString");
std::pair<StringRef,StringRef> Comma = Conds.split(',');
bool First = true;
do {
if (!First)
OS << " && ";
bool Neg = false;
StringRef Cond = Comma.first;
if (Cond[0] == '!') {
Neg = true;
Cond = Cond.substr(1);
}
OS << "((FB & " << Info.Target.getName() << "::" << Cond << ")";
if (Neg)
OS << " == 0";
else
OS << " != 0";
OS << ")";
if (Comma.second.empty())
break;
First = false;
Comma = Comma.second.split(',');
} while (true);
OS << ")\n";
OS << " Features |= " << SFI.getEnumName() << ";\n";
}
OS << " return Features;\n";
@@ -2140,8 +2168,7 @@ void AsmMatcherEmitter::run(raw_ostream &OS) {
OS << "#undef GET_ASSEMBLER_HEADER\n";
OS << " // This should be included into the middle of the declaration of\n";
OS << " // your subclasses implementation of TargetAsmParser.\n";
OS << " unsigned ComputeAvailableFeatures(const " <<
Target.getName() << "Subtarget *Subtarget) const;\n";
OS << " unsigned ComputeAvailableFeatures(uint64_t FeatureBits) const;\n";
OS << " enum MatchResultTy {\n";
OS << " Match_ConversionFail,\n";
OS << " Match_InvalidOperand,\n";

10
utils/TableGen/SubtargetEmitter.cpp
View File

@@ -645,12 +645,18 @@ void SubtargetEmitter::run(raw_ostream &OS) {
EmitSourceFileHeader("Subtarget Enumeration Source Fragment", OS);
OS << "\n#ifdef GET_SUBTARGETINFO_ENUM\n";
OS << "#undef GET_SUBTARGETINFO_ENUM\n";
OS << "namespace llvm {\n";
Enumeration(OS, "SubtargetFeature", true);
OS << "} // End llvm namespace \n";
OS << "#endif // GET_SUBTARGETINFO_ENUM\n\n";
OS << "\n#ifdef GET_SUBTARGETINFO_MC_DESC\n";
OS << "#undef GET_SUBTARGETINFO_MC_DESC\n";
OS << "namespace llvm {\n";
Enumeration(OS, "SubtargetFeature", true);
OS<<"\n";
unsigned NumFeatures = FeatureKeyValues(OS);
OS<<"\n";
unsigned NumProcs = CPUKeyValues(OS);