X-Git-Url: http://plrg.eecs.uci.edu/git/?a=blobdiff_plain;f=utils%2FTableGen%2FAsmWriterEmitter.cpp;h=44622e937dadba58f75d3912ac1a3323c673d802;hb=168705049c55feec88aec65af0aef07fc1376ce6;hp=f34feef0c28d64df01f2abf77c1625570f29e0c3;hpb=636bef1f35eb7ca4c605d57aa6b8fbe9ff8207a8;p=oota-llvm.git diff --git a/utils/TableGen/AsmWriterEmitter.cpp b/utils/TableGen/AsmWriterEmitter.cpp index f34feef0c28..44622e937da 100644 --- a/utils/TableGen/AsmWriterEmitter.cpp +++ b/utils/TableGen/AsmWriterEmitter.cpp @@ -13,275 +13,15 @@ //===----------------------------------------------------------------------===// #include "AsmWriterEmitter.h" +#include "AsmWriterInst.h" #include "CodeGenTarget.h" #include "Record.h" -#include "llvm/ADT/StringExtras.h" +#include "StringToOffsetTable.h" #include "llvm/Support/Debug.h" #include "llvm/Support/MathExtras.h" #include -#include using namespace llvm; -static bool isIdentChar(char C) { - return (C >= 'a' && C <= 'z') || - (C >= 'A' && C <= 'Z') || - (C >= '0' && C <= '9') || - C == '_'; -} - -// This should be an anon namespace, this works around a GCC warning. -namespace llvm { - 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; - - /// MiModifier - For isMachineInstrOperand, this is the modifier string for - /// an operand, specified with syntax like ${opname:modifier}. - std::string MiModifier; - - // To make VS STL happy - AsmWriterOperand():OperandType(isLiteralTextOperand) {} - - explicit AsmWriterOperand(const std::string &LitStr) - : OperandType(isLiteralTextOperand), Str(LitStr) {} - - AsmWriterOperand(const std::string &Printer, unsigned OpNo, - const std::string &Modifier) - : OperandType(isMachineInstrOperand), Str(Printer), MIOpNo(OpNo), - MiModifier(Modifier) {} - - bool operator!=(const AsmWriterOperand &Other) const { - if (OperandType != Other.OperandType || Str != Other.Str) return true; - if (OperandType == isMachineInstrOperand) - return MIOpNo != Other.MIOpNo || MiModifier != Other.MiModifier; - return false; - } - bool operator==(const AsmWriterOperand &Other) const { - return !operator!=(Other); - } - - /// getCode - Return the code that prints this operand. - std::string getCode() const; - }; -} - -namespace llvm { - class AsmWriterInst { - public: - std::vector Operands; - const CodeGenInstruction *CGI; - - AsmWriterInst(const CodeGenInstruction &CGI, unsigned Variant); - - /// MatchesAllButOneOp - If this instruction is exactly identical to the - /// specified instruction except for one differing operand, return the - /// differing operand number. Otherwise return ~0. - unsigned MatchesAllButOneOp(const AsmWriterInst &Other) const; - - 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)); - } - }; -} - - -std::string AsmWriterOperand::getCode() const { - if (OperandType == isLiteralTextOperand) - return "O << \"" + Str + "\"; "; - - std::string Result = Str + "(MI"; - if (MIOpNo != ~0U) - Result += ", " + utostr(MIOpNo); - if (!MiModifier.empty()) - Result += ", \"" + MiModifier + '"'; - return Result + "); "; -} - - -/// ParseAsmString - Parse the specified Instruction's AsmString into this -/// AsmWriterInst. -/// -AsmWriterInst::AsmWriterInst(const CodeGenInstruction &CGI, unsigned Variant) { - this->CGI = &CGI; - unsigned CurVariant = ~0U; // ~0 if we are outside a {.|.|.} region, other #. - - // NOTE: Any extensions to this code need to be mirrored in the - // AsmPrinter::printInlineAsm code that executes as compile time (assuming - // that inline asm strings should also get the new feature)! - 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) { - if (CurVariant == Variant || CurVariant == ~0U) { - for (; LastEmitted != DollarPos; ++LastEmitted) - switch (AsmString[LastEmitted]) { - case '\n': AddLiteralString("\\n"); break; - case '\t': AddLiteralString("\\t"); break; - case '"': AddLiteralString("\\\""); break; - case '\\': AddLiteralString("\\\\"); break; - default: - AddLiteralString(std::string(1, AsmString[LastEmitted])); - break; - } - } else { - LastEmitted = DollarPos; - } - } else if (AsmString[DollarPos] == '\\') { - if (DollarPos+1 != AsmString.size() && - (CurVariant == Variant || CurVariant == ~0U)) { - if (AsmString[DollarPos+1] == 'n') { - AddLiteralString("\\n"); - } else if (AsmString[DollarPos+1] == 't') { - AddLiteralString("\\t"); - } else if (std::string("${|}\\").find(AsmString[DollarPos+1]) - != std::string::npos) { - AddLiteralString(std::string(1, AsmString[DollarPos+1])); - } else { - throw "Non-supported escaped character found in instruction '" + - CGI.TheDef->getName() + "'!"; - } - LastEmitted = DollarPos+2; - continue; - } - } else if (AsmString[DollarPos] == '{') { - if (CurVariant != ~0U) - throw "Nested variants found for instruction '" + - CGI.TheDef->getName() + "'!"; - LastEmitted = DollarPos+1; - CurVariant = 0; // We are now inside of the variant! - } else if (AsmString[DollarPos] == '|') { - if (CurVariant == ~0U) - throw "'|' character found outside of a variant in instruction '" - + CGI.TheDef->getName() + "'!"; - ++CurVariant; - ++LastEmitted; - } else if (AsmString[DollarPos] == '}') { - if (CurVariant == ~0U) - throw "'}' character found outside of a variant in instruction '" - + CGI.TheDef->getName() + "'!"; - ++LastEmitted; - CurVariant = ~0U; - } else if (DollarPos+1 != AsmString.size() && - AsmString[DollarPos+1] == '$') { - if (CurVariant == Variant || CurVariant == ~0U) - AddLiteralString("$"); // "$$" -> $ - LastEmitted = DollarPos+2; - } else { - // Get the name of the variable. - std::string::size_type VarEnd = DollarPos+1; - - // handle ${foo}bar as $foo by detecting whether the character following - // the dollar sign is a curly brace. If so, advance VarEnd and DollarPos - // so the variable name does not contain the leading curly brace. - bool hasCurlyBraces = false; - if (VarEnd < AsmString.size() && '{' == AsmString[VarEnd]) { - hasCurlyBraces = true; - ++DollarPos; - ++VarEnd; - } - - while (VarEnd < AsmString.size() && isIdentChar(AsmString[VarEnd])) - ++VarEnd; - std::string VarName(AsmString.begin()+DollarPos+1, - AsmString.begin()+VarEnd); - - // Modifier - Support ${foo:modifier} syntax, where "modifier" is passed - // into printOperand. Also support ${:feature}, which is passed into - // PrintSpecial. - std::string Modifier; - - // In order to avoid starting the next string at the terminating curly - // brace, advance the end position past it if we found an opening curly - // brace. - if (hasCurlyBraces) { - if (VarEnd >= AsmString.size()) - throw "Reached end of string before terminating curly brace in '" - + CGI.TheDef->getName() + "'"; - - // Look for a modifier string. - if (AsmString[VarEnd] == ':') { - ++VarEnd; - if (VarEnd >= AsmString.size()) - throw "Reached end of string before terminating curly brace in '" - + CGI.TheDef->getName() + "'"; - - unsigned ModifierStart = VarEnd; - while (VarEnd < AsmString.size() && isIdentChar(AsmString[VarEnd])) - ++VarEnd; - Modifier = std::string(AsmString.begin()+ModifierStart, - AsmString.begin()+VarEnd); - if (Modifier.empty()) - throw "Bad operand modifier name in '"+ CGI.TheDef->getName() + "'"; - } - - if (AsmString[VarEnd] != '}') - throw "Variable name beginning with '{' did not end with '}' in '" - + CGI.TheDef->getName() + "'"; - ++VarEnd; - } - if (VarName.empty() && Modifier.empty()) - throw "Stray '$' in '" + CGI.TheDef->getName() + - "' asm string, maybe you want $$?"; - - if (VarName.empty()) { - // Just a modifier, pass this into PrintSpecial. - Operands.push_back(AsmWriterOperand("PrintSpecial", ~0U, Modifier)); - } else { - // Otherwise, normal operand. - unsigned OpNo = CGI.getOperandNamed(VarName); - CodeGenInstruction::OperandInfo OpInfo = CGI.OperandList[OpNo]; - - if (CurVariant == Variant || CurVariant == ~0U) { - unsigned MIOp = OpInfo.MIOperandNo; - Operands.push_back(AsmWriterOperand(OpInfo.PrinterMethodName, MIOp, - Modifier)); - } - } - LastEmitted = VarEnd; - } - } - - AddLiteralString("\\n"); -} - -/// MatchesAllButOneOp - If this instruction is exactly identical to the -/// specified instruction except for one differing operand, return the differing -/// operand number. If more than one operand mismatches, return ~1, otherwise -/// if the instructions are identical return ~0. -unsigned AsmWriterInst::MatchesAllButOneOp(const AsmWriterInst &Other)const{ - if (Operands.size() != Other.Operands.size()) return ~1; - - unsigned MismatchOperand = ~0U; - for (unsigned i = 0, e = Operands.size(); i != e; ++i) { - if (Operands[i] != Other.Operands[i]) { - if (MismatchOperand != ~0U) // Already have one mismatch? - return ~1U; - else - MismatchOperand = i; - } - } - return MismatchOperand; -} - static void PrintCases(std::vector > &OpsToPrint, raw_ostream &O) { O << " case " << OpsToPrint.back().first << ": "; @@ -357,7 +97,6 @@ static void EmitInstructions(std::vector &Insts, } O << "\n"; } - O << " break;\n"; } @@ -376,7 +115,7 @@ FindUniqueOperandCommands(std::vector &UniqueOperandCommands, for (unsigned i = 0, e = NumberedInstructions.size(); i != e; ++i) { const AsmWriterInst *Inst = getAsmWriterInstByID(i); - if (Inst == 0) continue; // PHI, INLINEASM, DBG_LABEL, etc. + if (Inst == 0) continue; // PHI, INLINEASM, PROLOG_LABEL, etc. std::string Command; if (Inst->Operands.empty()) @@ -384,10 +123,6 @@ FindUniqueOperandCommands(std::vector &UniqueOperandCommands, Command = " " + Inst->Operands[0].getCode() + "\n"; - // If this is the last operand, emit a return. - if (Inst->Operands.size() == 1) - Command += " return true;\n"; - // Check to see if we already have 'Command' in UniqueOperandCommands. // If not, add it. bool FoundIt = false; @@ -431,7 +166,10 @@ FindUniqueOperandCommands(std::vector &UniqueOperandCommands, // Otherwise, scan to see if all of the other instructions in this command // set share the operand. bool AllSame = true; - + // Keep track of the maximum, number of operands or any + // instruction we see in the group. + size_t MaxSize = FirstInst->Operands.size(); + for (NIT = std::find(NIT+1, InstIdxs.end(), CommandIdx); NIT != InstIdxs.end(); NIT = std::find(NIT+1, InstIdxs.end(), CommandIdx)) { @@ -439,6 +177,11 @@ FindUniqueOperandCommands(std::vector &UniqueOperandCommands, // matches, we're ok, otherwise bail out. const AsmWriterInst *OtherInst = getAsmWriterInstByID(NIT-InstIdxs.begin()); + + if (OtherInst && + OtherInst->Operands.size() > FirstInst->Operands.size()) + MaxSize = std::max(MaxSize, OtherInst->Operands.size()); + if (!OtherInst || OtherInst->Operands.size() == Op || OtherInst->Operands[Op] != FirstInst->Operands[Op]) { AllSame = false; @@ -451,10 +194,6 @@ FindUniqueOperandCommands(std::vector &UniqueOperandCommands, // to UniqueOperandCommands and remember that it was consumed. std::string Command = " " + FirstInst->Operands[Op].getCode() + "\n"; - // If this is the last operand, emit a return after the code. - if (FirstInst->Operands.size() == Op+1) - Command += " return true;\n"; - UniqueOperandCommands[CommandIdx] += Command; InstOpsUsed[CommandIdx]++; } @@ -475,32 +214,56 @@ FindUniqueOperandCommands(std::vector &UniqueOperandCommands, } +static void UnescapeString(std::string &Str) { + for (unsigned i = 0; i != Str.size(); ++i) { + if (Str[i] == '\\' && i != Str.size()-1) { + switch (Str[i+1]) { + default: continue; // Don't execute the code after the switch. + case 'a': Str[i] = '\a'; break; + case 'b': Str[i] = '\b'; break; + case 'e': Str[i] = 27; break; + case 'f': Str[i] = '\f'; break; + case 'n': Str[i] = '\n'; break; + case 'r': Str[i] = '\r'; break; + case 't': Str[i] = '\t'; break; + case 'v': Str[i] = '\v'; break; + case '"': Str[i] = '\"'; break; + case '\'': Str[i] = '\''; break; + case '\\': Str[i] = '\\'; break; + } + // Nuke the second character. + Str.erase(Str.begin()+i+1); + } + } +} -void AsmWriterEmitter::run(raw_ostream &O) { - EmitSourceFileHeader("Assembly Writer Source Fragment", O); - +/// EmitPrintInstruction - Generate the code for the "printInstruction" method +/// implementation. +void AsmWriterEmitter::EmitPrintInstruction(raw_ostream &O) { CodeGenTarget Target; Record *AsmWriter = Target.getAsmWriter(); std::string ClassName = AsmWriter->getValueAsString("AsmWriterClassName"); - unsigned Variant = AsmWriter->getValueAsInt("Variant"); - + O << "/// printInstruction - This method is automatically generated by tablegen\n" - "/// from the instruction set description. This method returns true if the\n" - "/// machine instruction was sufficiently described to print it, otherwise\n" - "/// it returns false.\n" - "bool " << Target.getName() << ClassName - << "::printInstruction(const MachineInstr *MI) {\n"; + "/// from the instruction set description.\n" + "void " << Target.getName() << ClassName + << "::printInstruction(const MachineInstr *MI, raw_ostream &O) {\n"; std::vector Instructions; for (CodeGenTarget::inst_iterator I = Target.inst_begin(), E = Target.inst_end(); I != E; ++I) - if (!I->second.AsmString.empty()) - Instructions.push_back(AsmWriterInst(I->second, Variant)); + if (!(*I)->AsmString.empty() && + (*I)->TheDef->getName() != "PHI") + Instructions.push_back( + AsmWriterInst(**I, + AsmWriter->getValueAsInt("Variant"), + AsmWriter->getValueAsInt("FirstOperandColumn"), + AsmWriter->getValueAsInt("OperandSpacing"))); // Get the instruction numbering. - Target.getInstructionsByEnumValue(NumberedInstructions); + NumberedInstructions = Target.getInstructionsByEnumValue(); // Compute the CodeGenInstruction -> AsmWriterInst mapping. Note that not // all machine instructions are necessarily being printed, so there may be @@ -509,10 +272,7 @@ void AsmWriterEmitter::run(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. - std::map StringOffset; - std::string AggregateString; - AggregateString.push_back(0); // "\0" - AggregateString.push_back(0); // "\0" + StringToOffsetTable 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. @@ -524,32 +284,28 @@ void AsmWriterEmitter::run(raw_ostream &O) { unsigned Idx; if (AWI == 0) { // Something not handled by the asmwriter printer. - Idx = 0; + Idx = ~0U; } else if (AWI->Operands[0].OperandType != AsmWriterOperand::isLiteralTextOperand || AWI->Operands[0].Str.empty()) { // Something handled by the asmwriter printer, but with no leading string. - Idx = 1; + Idx = StringTable.GetOrAddStringOffset(""); } else { - unsigned &Entry = StringOffset[AWI->Operands[0].Str]; - if (Entry == 0) { - // Add the string to the aggregate if this is the first time found. - MaxStringIdx = Entry = AggregateString.size(); - std::string Str = AWI->Operands[0].Str; - UnescapeString(Str); - AggregateString += Str; - AggregateString += '\0'; - } - Idx = Entry; - + std::string Str = AWI->Operands[0].Str; + UnescapeString(Str); + Idx = StringTable.GetOrAddStringOffset(Str); + MaxStringIdx = std::max(MaxStringIdx, Idx); + // Nuke the string from the operand list. It is now handled! AWI->Operands.erase(AWI->Operands.begin()); } - OpcodeInfo.push_back(Idx); + + // Bias offset by one since we want 0 as a sentinel. + OpcodeInfo.push_back(Idx+1); } // Figure out how many bits we used for the string index. - unsigned AsmStrBits = Log2_32_Ceil(MaxStringIdx+1); + unsigned AsmStrBits = Log2_32_Ceil(MaxStringIdx+2); // To reduce code size, we compactify common instructions into a few bits // in the opcode-indexed table. @@ -557,17 +313,8 @@ void AsmWriterEmitter::run(raw_ostream &O) { std::vector > TableDrivenOperandPrinters; - bool isFirst = true; while (1) { std::vector UniqueOperandCommands; - - // For the first operand check, add a default value for instructions with - // just opcode strings to use. - if (isFirst) { - UniqueOperandCommands.push_back(" return true;\n"); - isFirst = false; - } - std::vector InstIdxs; std::vector NumInstOpsHandled; FindUniqueOperandCommands(UniqueOperandCommands, InstIdxs, @@ -582,8 +329,8 @@ void AsmWriterEmitter::run(raw_ostream &O) { // If we don't have enough bits for this operand, don't include it. if (NumBits > BitsLeft) { - DOUT << "Not enough bits to densely encode " << NumBits - << " more bits\n"; + DEBUG(errs() << "Not enough bits to densely encode " << NumBits + << " more bits\n"); break; } @@ -621,62 +368,16 @@ void AsmWriterEmitter::run(raw_ostream &O) { O << " };\n\n"; // Emit the string itself. - O << " const char *AsmStrs = \n \""; - unsigned CharsPrinted = 0; - EscapeString(AggregateString); - for (unsigned i = 0, e = AggregateString.size(); i != e; ++i) { - if (CharsPrinted > 70) { - O << "\"\n \""; - CharsPrinted = 0; - } - O << AggregateString[i]; - ++CharsPrinted; - - // Print escape sequences all together. - if (AggregateString[i] == '\\') { - assert(i+1 < AggregateString.size() && "Incomplete escape sequence!"); - if (isdigit(AggregateString[i+1])) { - assert(isdigit(AggregateString[i+2]) && isdigit(AggregateString[i+3]) && - "Expected 3 digit octal escape!"); - O << AggregateString[++i]; - O << AggregateString[++i]; - O << AggregateString[++i]; - CharsPrinted += 3; - } else { - O << AggregateString[++i]; - ++CharsPrinted; - } - } - } - O << "\";\n\n"; - - O << " processDebugLoc(MI->getDebugLoc());\n\n"; - - O << "\n#ifndef NO_ASM_WRITER_BOILERPLATE\n"; - - O << " if (MI->getOpcode() == TargetInstrInfo::INLINEASM) {\n" - << " O << \"\\t\";\n" - << " printInlineAsm(MI);\n" - << " return true;\n" - << " } else if (MI->isLabel()) {\n" - << " printLabel(MI);\n" - << " return true;\n" - << " } else if (MI->getOpcode() == TargetInstrInfo::DECLARE) {\n" - << " printDeclare(MI);\n" - << " return true;\n" - << " } else if (MI->getOpcode() == TargetInstrInfo::IMPLICIT_DEF) {\n" - << " printImplicitDef(MI);\n" - << " return true;\n" - << " }\n\n"; - - O << "\n#endif\n"; + O << " const char *AsmStrs = \n"; + StringTable.EmitString(O); + O << ";\n\n"; O << " O << \"\\t\";\n\n"; O << " // Emit the opcode for the instruction.\n" << " unsigned Bits = OpInfo[MI->getOpcode()];\n" - << " if (Bits == 0) return false;\n" - << " O << AsmStrs+(Bits & " << (1 << AsmStrBits)-1 << ");\n\n"; + << " assert(Bits != 0 && \"Cannot print this instruction.\");\n" + << " O << AsmStrs+(Bits & " << (1 << AsmStrBits)-1 << ")-1;\n\n"; // Output the table driven operand information. BitsLeft = 32-AsmStrBits; @@ -702,6 +403,9 @@ void AsmWriterEmitter::run(raw_ostream &O) { << " } else {\n" << Commands[0] << " }\n\n"; + } else if (Commands.size() == 1) { + // Emit a single possibility. + O << Commands[0] << "\n\n"; } else { O << " switch ((Bits >> " << (BitsLeft+AsmStrBits) << ") & " << ((1 << NumBits)-1) << ") {\n" @@ -732,6 +436,11 @@ void AsmWriterEmitter::run(raw_ostream &O) { // elements in the vector. std::reverse(Instructions.begin(), Instructions.end()); + + // Now that we've emitted all of the operand info that fit into 32 bits, emit + // information for those instructions that are left. This is a less dense + // encoding, but we expect the main 32-bit table to handle the majority of + // instructions. if (!Instructions.empty()) { // Find the opcode # of inline asm. O << " switch (MI->getOpcode()) {\n"; @@ -739,8 +448,104 @@ void AsmWriterEmitter::run(raw_ostream &O) { EmitInstructions(Instructions, O); O << " }\n"; - O << " return true;\n"; + O << " return;\n"; } - + O << "}\n"; } + + +void AsmWriterEmitter::EmitGetRegisterName(raw_ostream &O) { + CodeGenTarget Target; + Record *AsmWriter = Target.getAsmWriter(); + std::string ClassName = AsmWriter->getValueAsString("AsmWriterClassName"); + const std::vector &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" + "/// for the specified register.\n" + "const char *" << Target.getName() << ClassName + << "::getRegisterName(unsigned RegNo) {\n" + << " assert(RegNo && RegNo < " << (Registers.size()+1) + << " && \"Invalid register number!\");\n" + << "\n" + << " static const unsigned RegAsmOffset[] = {"; + 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(); + + + if ((i % 14) == 0) + O << "\n "; + + O << StringTable.GetOrAddStringOffset(AsmName) << ", "; + } + O << "0\n" + << " };\n" + << "\n"; + + O << " const char *AsmStrs =\n"; + StringTable.EmitString(O); + O << ";\n"; + + O << " return AsmStrs+RegAsmOffset[RegNo-1];\n" + << "}\n"; +} + +void AsmWriterEmitter::EmitGetInstructionName(raw_ostream &O) { + CodeGenTarget Target; + Record *AsmWriter = Target.getAsmWriter(); + std::string ClassName = AsmWriter->getValueAsString("AsmWriterClassName"); + + const std::vector &NumberedInstructions = + Target.getInstructionsByEnumValue(); + + StringToOffsetTable StringTable; + O << +"\n\n#ifdef GET_INSTRUCTION_NAME\n" +"#undef GET_INSTRUCTION_NAME\n\n" +"/// getInstructionName: This method is automatically generated by tblgen\n" +"/// from the instruction set description. This returns the enum name of the\n" +"/// specified instruction.\n" + "const char *" << Target.getName() << ClassName + << "::getInstructionName(unsigned Opcode) {\n" + << " assert(Opcode < " << NumberedInstructions.size() + << " && \"Invalid instruction number!\");\n" + << "\n" + << " static const unsigned InstAsmOffset[] = {"; + for (unsigned i = 0, e = NumberedInstructions.size(); i != e; ++i) { + const CodeGenInstruction &Inst = *NumberedInstructions[i]; + + std::string AsmName = Inst.TheDef->getName(); + if ((i % 14) == 0) + O << "\n "; + + O << StringTable.GetOrAddStringOffset(AsmName) << ", "; + } + O << "0\n" + << " };\n" + << "\n"; + + O << " const char *Strs =\n"; + StringTable.EmitString(O); + O << ";\n"; + + O << " return Strs+InstAsmOffset[Opcode];\n" + << "}\n\n#endif\n"; +} + + + +void AsmWriterEmitter::run(raw_ostream &O) { + EmitSourceFileHeader("Assembly Writer Source Fragment", O); + + EmitPrintInstruction(O); + EmitGetRegisterName(O); + EmitGetInstructionName(O); +} +