summaryrefslogtreecommitdiff
path: root/utils/TableGen/AsmWriterEmitter.cpp
diff options
context:
space:
mode:
Diffstat (limited to 'utils/TableGen/AsmWriterEmitter.cpp')
-rw-r--r--utils/TableGen/AsmWriterEmitter.cpp239
1 files changed, 153 insertions, 86 deletions
diff --git a/utils/TableGen/AsmWriterEmitter.cpp b/utils/TableGen/AsmWriterEmitter.cpp
index 711a20ba0c..d44515fe2e 100644
--- a/utils/TableGen/AsmWriterEmitter.cpp
+++ b/utils/TableGen/AsmWriterEmitter.cpp
@@ -25,6 +25,154 @@ static bool isIdentChar(char C) {
C == '_';
}
+namespace {
+ struct AsmWriterOperand {
+ enum { isLiteralTextOperand, isMachineInstrOperand } OperandType;
+
+ /// Str - For isLiteralTextOperand, this IS the literal text. For
+ /// isMachineInstrOperand, this is the PrinterMethodName for the operand.
+ std::string Str;
+
+ /// MiOpNo - For isMachineInstrOperand, this is the operand number of the
+ /// machine instruction.
+ unsigned MIOpNo;
+
+ /// OpVT - For isMachineInstrOperand, this is the value type for the
+ /// operand.
+ MVT::ValueType OpVT;
+
+ AsmWriterOperand(const std::string &LitStr)
+ : OperandType(isLiteralTextOperand), Str(LitStr) {}
+
+ AsmWriterOperand(const std::string &Printer, unsigned OpNo,
+ MVT::ValueType VT) : OperandType(isMachineInstrOperand),
+ Str(Printer), MIOpNo(OpNo), OpVT(VT){}
+
+ void EmitCode(std::ostream &OS) const;
+ };
+
+ struct AsmWriterInst {
+ std::vector<AsmWriterOperand> Operands;
+
+ void ParseAsmString(const CodeGenInstruction &CGI, unsigned Variant);
+ void EmitCode(std::ostream &OS) const {
+ for (unsigned i = 0, e = Operands.size(); i != e; ++i)
+ Operands[i].EmitCode(OS);
+ }
+ private:
+ void AddLiteralString(const std::string &Str) {
+ // If the last operand was already a literal text string, append this to
+ // it, otherwise add a new operand.
+ if (!Operands.empty() &&
+ Operands.back().OperandType == AsmWriterOperand::isLiteralTextOperand)
+ Operands.back().Str.append(Str);
+ else
+ Operands.push_back(AsmWriterOperand(Str));
+ }
+ };
+}
+
+
+void AsmWriterOperand::EmitCode(std::ostream &OS) const {
+ if (OperandType == isLiteralTextOperand)
+ OS << "O << \"" << Str << "\"; ";
+ else
+ OS << Str << "(MI, " << MIOpNo << ", MVT::" << getName(OpVT) << "); ";
+}
+
+
+/// ParseAsmString - Parse the specified Instruction's AsmString into this
+/// AsmWriterInst.
+///
+void AsmWriterInst::ParseAsmString(const CodeGenInstruction &CGI,
+ unsigned Variant) {
+ bool inVariant = false; // True if we are inside a {.|.|.} region.
+
+ const std::string &AsmString = CGI.AsmString;
+ std::string::size_type LastEmitted = 0;
+ while (LastEmitted != AsmString.size()) {
+ std::string::size_type DollarPos =
+ AsmString.find_first_of("${|}", LastEmitted);
+ if (DollarPos == std::string::npos) DollarPos = AsmString.size();
+
+ // Emit a constant string fragment.
+ if (DollarPos != LastEmitted) {
+ // TODO: this should eventually handle escaping.
+ AddLiteralString(std::string(AsmString.begin()+LastEmitted,
+ AsmString.begin()+DollarPos));
+ LastEmitted = DollarPos;
+ } else if (AsmString[DollarPos] == '{') {
+ if (inVariant)
+ throw "Nested variants found for instruction '" + CGI.Name + "'!";
+ LastEmitted = DollarPos+1;
+ inVariant = true; // We are now inside of the variant!
+ for (unsigned i = 0; i != Variant; ++i) {
+ // Skip over all of the text for an irrelevant variant here. The
+ // next variant starts at |, or there may not be text for this
+ // variant if we see a }.
+ std::string::size_type NP =
+ AsmString.find_first_of("|}", LastEmitted);
+ if (NP == std::string::npos)
+ throw "Incomplete variant for instruction '" + CGI.Name + "'!";
+ LastEmitted = NP+1;
+ if (AsmString[NP] == '}') {
+ inVariant = false; // No text for this variant.
+ break;
+ }
+ }
+ } else if (AsmString[DollarPos] == '|') {
+ if (!inVariant)
+ throw "'|' character found outside of a variant in instruction '"
+ + CGI.Name + "'!";
+ // Move to the end of variant list.
+ std::string::size_type NP = AsmString.find('}', LastEmitted);
+ if (NP == std::string::npos)
+ throw "Incomplete variant for instruction '" + CGI.Name + "'!";
+ LastEmitted = NP+1;
+ inVariant = false;
+ } else if (AsmString[DollarPos] == '}') {
+ if (!inVariant)
+ throw "'}' character found outside of a variant in instruction '"
+ + CGI.Name + "'!";
+ LastEmitted = DollarPos+1;
+ inVariant = false;
+ } else if (DollarPos+1 != AsmString.size() &&
+ AsmString[DollarPos+1] == '$') {
+ AddLiteralString("$"); // "$$" -> $
+ LastEmitted = DollarPos+2;
+ } else {
+ // Get the name of the variable.
+ // TODO: should eventually handle ${foo}bar as $foo
+ std::string::size_type VarEnd = DollarPos+1;
+ while (VarEnd < AsmString.size() && isIdentChar(AsmString[VarEnd]))
+ ++VarEnd;
+ std::string VarName(AsmString.begin()+DollarPos+1,
+ AsmString.begin()+VarEnd);
+ if (VarName.empty())
+ throw "Stray '$' in '" + CGI.Name + "' asm string, maybe you want $$?";
+
+ unsigned OpNo = CGI.getOperandNamed(VarName);
+
+ // If this is a two-address instruction and we are not accessing the
+ // 0th operand, remove an operand.
+ unsigned MIOp = CGI.OperandList[OpNo].MIOperandNo;
+ if (CGI.isTwoAddress && MIOp != 0) {
+ if (MIOp == 1)
+ throw "Should refer to operand #0 instead of #1 for two-address"
+ " instruction '" + CGI.Name + "'!";
+ --MIOp;
+ }
+
+ Operands.push_back(AsmWriterOperand(CGI.OperandList[OpNo].PrinterMethodName,
+ MIOp, CGI.OperandList[OpNo].Ty));
+ LastEmitted = VarEnd;
+ }
+ }
+
+ AddLiteralString("\\n");
+}
+
+
void AsmWriterEmitter::run(std::ostream &O) {
EmitSourceFileHeader("Assembly Writer Source Fragment", O);
@@ -45,96 +193,15 @@ void AsmWriterEmitter::run(std::ostream &O) {
std::string Namespace = Target.inst_begin()->second.Namespace;
- bool inVariant = false; // True if we are inside a {.|.|.} region.
-
for (CodeGenTarget::inst_iterator I = Target.inst_begin(),
E = Target.inst_end(); I != E; ++I)
if (!I->second.AsmString.empty()) {
- const std::string &AsmString = I->second.AsmString;
- O << " case " << Namespace << "::" << I->first << ": O ";
-
- std::string::size_type LastEmitted = 0;
- while (LastEmitted != AsmString.size()) {
- std::string::size_type DollarPos =
- AsmString.find_first_of("${|}", LastEmitted);
- if (DollarPos == std::string::npos) DollarPos = AsmString.size();
-
- // Emit a constant string fragment.
- if (DollarPos != LastEmitted) {
- // TODO: this should eventually handle escaping.
- O << " << \"" << std::string(AsmString.begin()+LastEmitted,
- AsmString.begin()+DollarPos) << "\"";
- LastEmitted = DollarPos;
- } else if (AsmString[DollarPos] == '{') {
- if (inVariant)
- throw "Nested variants found for instruction '" + I->first + "'!";
- LastEmitted = DollarPos+1;
- inVariant = true; // We are now inside of the variant!
- for (unsigned i = 0; i != Variant; ++i) {
- // Skip over all of the text for an irrelevant variant here. The
- // next variant starts at |, or there may not be text for this
- // variant if we see a }.
- std::string::size_type NP =
- AsmString.find_first_of("|}", LastEmitted);
- if (NP == std::string::npos)
- throw "Incomplete variant for instruction '" + I->first + "'!";
- LastEmitted = NP+1;
- if (AsmString[NP] == '}') {
- inVariant = false; // No text for this variant.
- break;
- }
- }
- } else if (AsmString[DollarPos] == '|') {
- if (!inVariant)
- throw "'|' character found outside of a variant in instruction '"
- + I->first + "'!";
- // Move to the end of variant list.
- std::string::size_type NP = AsmString.find('}', LastEmitted);
- if (NP == std::string::npos)
- throw "Incomplete variant for instruction '" + I->first + "'!";
- LastEmitted = NP+1;
- inVariant = false;
- } else if (AsmString[DollarPos] == '}') {
- if (!inVariant)
- throw "'}' character found outside of a variant in instruction '"
- + I->first + "'!";
- LastEmitted = DollarPos+1;
- inVariant = false;
- } else if (DollarPos+1 != AsmString.size() &&
- AsmString[DollarPos+1] == '$') {
- O << " << '$'"; // "$$" -> $
- LastEmitted = DollarPos+2;
- } else {
- // Get the name of the variable.
- // TODO: should eventually handle ${foo}bar as $foo
- std::string::size_type VarEnd = DollarPos+1;
- while (VarEnd < AsmString.size() && isIdentChar(AsmString[VarEnd]))
- ++VarEnd;
- std::string VarName(AsmString.begin()+DollarPos+1,
- AsmString.begin()+VarEnd);
- if (VarName.empty())
- throw "Stray '$' in '" + I->first +
- "' asm string, maybe you want $$?";
- unsigned OpNo = I->second.getOperandNamed(VarName);
-
- // If this is a two-address instruction and we are not accessing the
- // 0th operand, remove an operand.
- unsigned MIOp = I->second.OperandList[OpNo].MIOperandNo;
- if (I->second.isTwoAddress && MIOp != 0) {
- if (MIOp == 1)
- throw "Should refer to operand #0 instead of #1 for two-address"
- " instruction '" + I->first + "'!";
- --MIOp;
- }
-
- O << "; " << I->second.OperandList[OpNo].PrinterMethodName
- << "(MI, " << MIOp << ", MVT::"
- << getName(I->second.OperandList[OpNo].Ty) << "); O ";
- LastEmitted = VarEnd;
- }
- }
+ O << " case " << Namespace << "::" << I->first << ": ";
- O << " << '\\n'; break;\n";
+ AsmWriterInst AWI;
+ AWI.ParseAsmString(I->second, Variant);
+ AWI.EmitCode(O);
+ O << " break;\n";
}
O << " }\n"
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-15 23:36:14 +0000