[llvm-commits] [llvm] r95697 - in /llvm/trunk/utils/TableGen: AsmWriterEmitter.cpp AsmWriterInst.cpp AsmWriterInst.h
Sean Callanan
scallanan at apple.com
Tue Feb 9 13:50:42 PST 2010
Author: spyffe
Date: Tue Feb 9 15:50:41 2010
New Revision: 95697
URL: http://llvm.org/viewvc/llvm-project?rev=95697&view=rev
Log:
Per PR 6219, factored AsmWriterInst and AsmWriterOperand
out of the AsmWriterEmitter. This patch does the physical
code movement, but leaves the implementation unchanged. I'll
make any changes necessary to generalize the code in a
separate patch.
Added:
llvm/trunk/utils/TableGen/AsmWriterInst.cpp
llvm/trunk/utils/TableGen/AsmWriterInst.h
Modified:
llvm/trunk/utils/TableGen/AsmWriterEmitter.cpp
Modified: llvm/trunk/utils/TableGen/AsmWriterEmitter.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/utils/TableGen/AsmWriterEmitter.cpp?rev=95697&r1=95696&r2=95697&view=diff
==============================================================================
--- llvm/trunk/utils/TableGen/AsmWriterEmitter.cpp (original)
+++ llvm/trunk/utils/TableGen/AsmWriterEmitter.cpp Tue Feb 9 15:50:41 2010
@@ -13,339 +13,15 @@
//===----------------------------------------------------------------------===//
#include "AsmWriterEmitter.h"
+#include "AsmWriterInst.h"
#include "CodeGenTarget.h"
#include "Record.h"
#include "StringToOffsetTable.h"
-#include "llvm/ADT/StringExtras.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/MathExtras.h"
#include <algorithm>
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 OpType {
- // Output this text surrounded by quotes to the asm.
- isLiteralTextOperand,
- // This is the name of a routine to call to print the operand.
- isMachineInstrOperand,
- // Output this text verbatim to the asm writer. It is code that
- // will output some text to the asm.
- isLiteralStatementOperand
- } OperandType;
-
- /// Str - For isLiteralTextOperand, this IS the literal text. For
- /// isMachineInstrOperand, this is the PrinterMethodName for the operand..
- /// For isLiteralStatementOperand, this is the code to insert verbatim
- /// into the asm writer.
- 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(OpType op = isLiteralTextOperand):OperandType(op) {}
-
- AsmWriterOperand(const std::string &LitStr,
- OpType op = isLiteralTextOperand)
- : OperandType(op), Str(LitStr) {}
-
- AsmWriterOperand(const std::string &Printer, unsigned OpNo,
- const std::string &Modifier,
- OpType op = isMachineInstrOperand)
- : OperandType(op), 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<AsmWriterOperand> Operands;
- const CodeGenInstruction *CGI;
-
- AsmWriterInst(const CodeGenInstruction &CGI, Record *AsmWriter);
-
- /// 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) {
- if (Str.size() == 1)
- return "O << '" + Str + "'; ";
- return "O << \"" + Str + "\"; ";
- }
-
- if (OperandType == isLiteralStatementOperand)
- return 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, Record *AsmWriter) {
- this->CGI = &CGI;
-
- unsigned Variant = AsmWriter->getValueAsInt("Variant");
- int FirstOperandColumn = AsmWriter->getValueAsInt("FirstOperandColumn");
- int OperandSpacing = AsmWriter->getValueAsInt("OperandSpacing");
-
- unsigned CurVariant = ~0U; // ~0 if we are outside a {.|.|.} region, other #.
-
- // This is the number of tabs we've seen if we're doing columnar layout.
- unsigned CurColumn = 0;
-
-
- // 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':
- // If the asm writer is not using a columnar layout, \t is not
- // magic.
- if (FirstOperandColumn == -1 || OperandSpacing == -1) {
- AddLiteralString("\\t");
- } else {
- // We recognize a tab as an operand delimeter.
- unsigned DestColumn = FirstOperandColumn +
- CurColumn++ * OperandSpacing;
- Operands.push_back(
- AsmWriterOperand("O.PadToColumn(" +
- utostr(DestColumn) + ");\n",
- AsmWriterOperand::isLiteralStatementOperand));
- }
- 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') {
- // If the asm writer is not using a columnar layout, \t is not
- // magic.
- if (FirstOperandColumn == -1 || OperandSpacing == -1) {
- AddLiteralString("\\t");
- break;
- }
-
- // We recognize a tab as an operand delimeter.
- unsigned DestColumn = FirstOperandColumn +
- CurColumn++ * OperandSpacing;
- Operands.push_back(
- AsmWriterOperand("O.PadToColumn(" + utostr(DestColumn) + ");\n",
- AsmWriterOperand::isLiteralStatementOperand));
- break;
- } 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;
- }
- }
-
- Operands.push_back(AsmWriterOperand("return;",
- AsmWriterOperand::isLiteralStatementOperand));
-}
-
-/// 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<std::pair<std::string,
AsmWriterOperand> > &OpsToPrint, raw_ostream &O) {
O << " case " << OpsToPrint.back().first << ": ";
Added: llvm/trunk/utils/TableGen/AsmWriterInst.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/utils/TableGen/AsmWriterInst.cpp?rev=95697&view=auto
==============================================================================
--- llvm/trunk/utils/TableGen/AsmWriterInst.cpp (added)
+++ llvm/trunk/utils/TableGen/AsmWriterInst.cpp Tue Feb 9 15:50:41 2010
@@ -0,0 +1,259 @@
+//===- AsmWriterInst.h - Classes encapsulating a printable inst -----------===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// These classes implement a parser for assembly strings.
+//
+//===----------------------------------------------------------------------===//
+
+#include "AsmWriterInst.h"
+#include "CodeGenTarget.h"
+#include "Record.h"
+#include "llvm/ADT/StringExtras.h"
+
+using namespace llvm;
+
+static bool isIdentChar(char C) {
+ return (C >= 'a' && C <= 'z') ||
+ (C >= 'A' && C <= 'Z') ||
+ (C >= '0' && C <= '9') ||
+ C == '_';
+}
+
+std::string AsmWriterOperand::getCode() const {
+ if (OperandType == isLiteralTextOperand) {
+ if (Str.size() == 1)
+ return "O << '" + Str + "'; ";
+ return "O << \"" + Str + "\"; ";
+ }
+
+ if (OperandType == isLiteralStatementOperand)
+ return 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, Record *AsmWriter) {
+ this->CGI = &CGI;
+
+ unsigned Variant = AsmWriter->getValueAsInt("Variant");
+ int FirstOperandColumn = AsmWriter->getValueAsInt("FirstOperandColumn");
+ int OperandSpacing = AsmWriter->getValueAsInt("OperandSpacing");
+
+ unsigned CurVariant = ~0U; // ~0 if we are outside a {.|.|.} region, other #.
+
+ // This is the number of tabs we've seen if we're doing columnar layout.
+ unsigned CurColumn = 0;
+
+
+ // 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("${|}\\", LastEmitted);
+ if (DollarPos == std::string::npos) DollarPos = AsmString.size();
+
+ // Emit a constant string fragment.
+
+ if (DollarPos != LastEmitted) {
+ if (CurVariant == Variant || CurVariant == ~0U) {
+ for (; LastEmitted != DollarPos; ++LastEmitted)
+ switch (AsmString[LastEmitted]) {
+ case '\n':
+ AddLiteralString("\\n");
+ break;
+ case '\t':
+ // If the asm writer is not using a columnar layout, \t is not
+ // magic.
+ if (FirstOperandColumn == -1 || OperandSpacing == -1) {
+ AddLiteralString("\\t");
+ } else {
+ // We recognize a tab as an operand delimeter.
+ unsigned DestColumn = FirstOperandColumn +
+ CurColumn++ * OperandSpacing;
+ Operands.push_back(
+ AsmWriterOperand("O.PadToColumn(" +
+ utostr(DestColumn) + ");\n",
+ AsmWriterOperand::isLiteralStatementOperand));
+ }
+ break;
+ case '"':
+ AddLiteralString("\\\"");
+ break;
+ case '\\':
+ AddLiteralString("\\\\");
+ break;
+ default:
+ AddLiteralString(std::string(1, AsmString[LastEmitted]));
+ break;
+ }
+ } else {
+ LastEmitted = DollarPos;
+ }
+ } else if (AsmString[DollarPos] == '\\') {
+ if (DollarPos+1 != AsmString.size() &&
+ (CurVariant == Variant || CurVariant == ~0U)) {
+ if (AsmString[DollarPos+1] == 'n') {
+ AddLiteralString("\\n");
+ } else if (AsmString[DollarPos+1] == 't') {
+ // If the asm writer is not using a columnar layout, \t is not
+ // magic.
+ if (FirstOperandColumn == -1 || OperandSpacing == -1) {
+ AddLiteralString("\\t");
+ break;
+ }
+
+ // We recognize a tab as an operand delimeter.
+ unsigned DestColumn = FirstOperandColumn +
+ CurColumn++ * OperandSpacing;
+ Operands.push_back(
+ AsmWriterOperand("O.PadToColumn(" + utostr(DestColumn) + ");\n",
+ AsmWriterOperand::isLiteralStatementOperand));
+ break;
+ } else if (std::string("${|}\\").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;
+ }
+ }
+
+ Operands.push_back(AsmWriterOperand("return;",
+ AsmWriterOperand::isLiteralStatementOperand));
+}
+
+/// 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;
+}
\ No newline at end of file
Added: llvm/trunk/utils/TableGen/AsmWriterInst.h
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/utils/TableGen/AsmWriterInst.h?rev=95697&view=auto
==============================================================================
--- llvm/trunk/utils/TableGen/AsmWriterInst.h (added)
+++ llvm/trunk/utils/TableGen/AsmWriterInst.h Tue Feb 9 15:50:41 2010
@@ -0,0 +1,104 @@
+//===- AsmWriterInst.h - Classes encapsulating a printable inst -*- C++ -*-===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// These classes implement a parser for assembly strings. The parser splits
+// the string into operands, which can be literal strings (the constant bits of
+// the string), actual operands (i.e., operands from the MachineInstr), and
+// dynamically-generated text, specified by raw C++ code.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef ASMWRITER_INST_H
+#define ASMWRITER_INST_H
+
+#include <string>
+#include <vector>
+
+namespace llvm {
+ class CodeGenInstruction;
+ class Record;
+
+ struct AsmWriterOperand {
+ enum OpType {
+ // Output this text surrounded by quotes to the asm.
+ isLiteralTextOperand,
+ // This is the name of a routine to call to print the operand.
+ isMachineInstrOperand,
+ // Output this text verbatim to the asm writer. It is code that
+ // will output some text to the asm.
+ isLiteralStatementOperand
+ } OperandType;
+
+ /// Str - For isLiteralTextOperand, this IS the literal text. For
+ /// isMachineInstrOperand, this is the PrinterMethodName for the operand..
+ /// For isLiteralStatementOperand, this is the code to insert verbatim
+ /// into the asm writer.
+ 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(OpType op = isLiteralTextOperand):OperandType(op) {}
+
+ AsmWriterOperand(const std::string &LitStr,
+ OpType op = isLiteralTextOperand)
+ : OperandType(op), Str(LitStr) {}
+
+ AsmWriterOperand(const std::string &Printer, unsigned OpNo,
+ const std::string &Modifier,
+ OpType op = isMachineInstrOperand)
+ : OperandType(op), 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;
+ };
+
+ class AsmWriterInst {
+ public:
+ std::vector<AsmWriterOperand> Operands;
+ const CodeGenInstruction *CGI;
+
+ AsmWriterInst(const CodeGenInstruction &CGI, Record *AsmWriter);
+
+ /// 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));
+ }
+ };
+}
+
+#endif
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