diff options
| -rw-r--r-- | utils/TableGen/AsmWriterEmitter.cpp | 42 |
1 files changed, 34 insertions, 8 deletions
diff --git a/utils/TableGen/AsmWriterEmitter.cpp b/utils/TableGen/AsmWriterEmitter.cpp index 327776b329..6fb322e2f2 100644 --- a/utils/TableGen/AsmWriterEmitter.cpp +++ b/utils/TableGen/AsmWriterEmitter.cpp @@ -55,6 +55,9 @@ namespace { return MIOpNo != Other.MIOpNo || OpVT != Other.OpVT; return false; } + bool operator==(const AsmWriterOperand &Other) const { + return !operator!=(Other); + } void EmitCode(std::ostream &OS) const; }; @@ -201,6 +204,25 @@ unsigned AsmWriterInst::MatchesAllButOneOp(const AsmWriterInst &Other)const{ return MismatchOperand; } +static void PrintCases(std::vector<std::pair<std::string, + AsmWriterOperand> > &OpsToPrint, std::ostream &O) { + O << " case " << OpsToPrint.back().first << ": "; + AsmWriterOperand TheOp = OpsToPrint.back().second; + OpsToPrint.pop_back(); + + // Check to see if any other operands are identical in this list, and if so, + // emit a case label for them. + for (unsigned i = OpsToPrint.size(); i != 0; --i) + if (OpsToPrint[i-1].second == TheOp) { + O << "\n case " << OpsToPrint[i-1].first << ": "; + OpsToPrint.erase(OpsToPrint.begin()+i-1); + } + + // Finally, emit the code. + TheOp.EmitCode(O); + O << "break;\n"; +} + /// EmitInstructions - Emit the last instruction in the vector and any other /// instructions that are suitably similar to it. @@ -242,16 +264,20 @@ static void EmitInstructions(std::vector<AsmWriterInst> &Insts, // If this is the operand that varies between all of the instructions, // emit a switch for just this operand now. O << " switch (MI->getOpcode()) {\n"; - O << " case " << Namespace << "::" - << FirstInst.CGI->TheDef->getName() << ": "; - FirstInst.Operands[i].EmitCode(O); - O << "break;\n"; + std::vector<std::pair<std::string, AsmWriterOperand> > OpsToPrint; + OpsToPrint.push_back(std::make_pair(Namespace+"::"+ + FirstInst.CGI->TheDef->getName(), + FirstInst.Operands[i])); + for (unsigned si = 0, e = SimilarInsts.size(); si != e; ++si) { - O << " case " << Namespace << "::" - << SimilarInsts[si].CGI->TheDef->getName() << ": "; - SimilarInsts[si].Operands[i].EmitCode(O); - O << "break;\n"; + AsmWriterInst &AWI = SimilarInsts[si]; + OpsToPrint.push_back(std::make_pair(Namespace+"::"+ + AWI.CGI->TheDef->getName(), + AWI.Operands[i])); } + std::reverse(OpsToPrint.begin(), OpsToPrint.end()); + while (!OpsToPrint.empty()) + PrintCases(OpsToPrint, O); O << " }"; } O << "\n"; |