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https://github.com/RPCS3/llvm.git
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Make a bunch of changes suggested by Chris and others to improve
efficiency. Fix a few formatting bugs along the way. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76601 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
David Greene
parent
3ecadc816d
commit
8f6353fb2f
@ -97,10 +97,17 @@ namespace llvm {
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/// GroupDelim - Remember the delimeter for a group operand.
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char GroupDelim[MAX_GROUP_NESTING_LEVEL];
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/// ReadingWhitespace - Tell whether we just read some whitespace.
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bool ReadingWhitespace;
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/// InGroup - Determine whether we are in the middle of an
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/// operand group.
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bool InGroup() const { return GroupLevel != -1; }
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/// InWhitespace - Determine whether we are in the middle of
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/// emitting whitespace.
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bool InWhitespace() const { return ReadingWhitespace; }
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AsmWriterInst(const CodeGenInstruction &CGI, unsigned Variant);
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/// MatchesAllButOneOp - If this instruction is exactly identical to the
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@ -112,70 +119,6 @@ namespace llvm {
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void AddLiteralString(const std::string &Str) {
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// If the last operand was already a literal text string, append this to
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// it, otherwise add a new operand.
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std::string::size_type SearchStart = 0;
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std::string::size_type SpaceStartPos = std::string::npos;
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do {
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// Search for whitespace and replace with calls to set the
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// output column.
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SpaceStartPos = Str.find_first_of(" \t", SearchStart);
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// Assume grouped text is one operand.
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std::string::size_type StartDelimPos = Str.find_first_of("[{(", SearchStart);
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SearchStart = std::string::npos;
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if (StartDelimPos != std::string::npos) {
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++GroupLevel;
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assert(GroupLevel < MAX_GROUP_NESTING_LEVEL
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&& "Exceeded maximum operand group nesting level");
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GroupDelim[GroupLevel] = Str[StartDelimPos];
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if (SpaceStartPos != std::string::npos &&
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SpaceStartPos > StartDelimPos) {
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// This space doesn't count.
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SpaceStartPos = std::string::npos;
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}
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}
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if (InGroup()) {
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// Find the end delimiter.
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char EndDelim = (GroupDelim[GroupLevel] == '{' ? '}' :
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(GroupDelim[GroupLevel] == '(' ? ')' : ']'));
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std::string::size_type EndDelimSearchStart =
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StartDelimPos == std::string::npos ? 0 : StartDelimPos+1;
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std::string::size_type EndDelimPos = Str.find(EndDelim,
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EndDelimSearchStart);
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SearchStart = EndDelimPos;
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if (EndDelimPos != std::string::npos) {
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// Iterate.
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SearchStart = EndDelimPos + 1;
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--GroupLevel;
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assert(GroupLevel > -2 && "Too many end delimeters!");
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}
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if (InGroup())
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SpaceStartPos = std::string::npos;
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}
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} while (SearchStart != std::string::npos);
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if (SpaceStartPos != std::string::npos) {
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std::string::size_type SpaceEndPos =
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Str.find_first_not_of(" \t", SpaceStartPos+1);
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if (SpaceStartPos != 0) {
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// Emit the first part of the string.
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AddLiteralString(Str.substr(0, SpaceStartPos));
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}
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Operands.push_back(
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AsmWriterOperand(
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"O.PadToColumn(TAI->getOperandColumn(OperandColumn++), 1);\n",
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AsmWriterOperand::isLiteralStatementOperand));
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if (SpaceEndPos != std::string::npos) {
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// Emit the last part of the string.
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AddLiteralString(Str.substr(SpaceEndPos));
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}
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// We've emitted the whole string.
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return;
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}
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if (!Operands.empty() &&
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Operands.back().OperandType == AsmWriterOperand::isLiteralTextOperand)
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Operands.back().Str.append(Str);
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@ -215,7 +158,7 @@ std::string AsmWriterOperand::getCode() const {
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/// AsmWriterInst.
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///
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AsmWriterInst::AsmWriterInst(const CodeGenInstruction &CGI, unsigned Variant)
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: GroupLevel(-1) {
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: GroupLevel(-1), ReadingWhitespace(false) {
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this->CGI = &CGI;
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unsigned CurVariant = ~0U; // ~0 if we are outside a {.|.|.} region, other #.
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@ -230,15 +173,92 @@ AsmWriterInst::AsmWriterInst(const CodeGenInstruction &CGI, unsigned Variant)
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if (DollarPos == std::string::npos) DollarPos = AsmString.size();
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// Emit a constant string fragment.
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// TODO: Recognize an operand separator to determine when to pad
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// to the next operator.
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if (DollarPos != LastEmitted) {
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if (CurVariant == Variant || CurVariant == ~0U) {
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for (; LastEmitted != DollarPos; ++LastEmitted)
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switch (AsmString[LastEmitted]) {
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case '\n': AddLiteralString("\\n"); break;
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case '\t': AddLiteralString("\\t"); break;
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case '"': AddLiteralString("\\\""); break;
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case '\\': AddLiteralString("\\\\"); break;
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case '\n':
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assert(!InGroup() && "Missing matching group delimeter");
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ReadingWhitespace = false;
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AddLiteralString("\\n");
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break;
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case '\t':
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if (!InGroup()) {
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ReadingWhitespace = true;
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}
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AddLiteralString("\\t");
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break;
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case '"':
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if (InWhitespace() && !InGroup())
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Operands.push_back(
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AsmWriterOperand(
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"O.PadToColumn(TAI->getOperandColumn(OperandColumn++));\n",
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AsmWriterOperand::isLiteralStatementOperand));
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ReadingWhitespace = false;
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AddLiteralString("\\\"");
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break;
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case '\\':
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if (InWhitespace() && !InGroup())
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Operands.push_back(
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AsmWriterOperand(
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"O.PadToColumn(TAI->getOperandColumn(OperandColumn++));\n",
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AsmWriterOperand::isLiteralStatementOperand));
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ReadingWhitespace = false;
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AddLiteralString("\\\\");
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break;
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case '(': // Fallthrough
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case '[':
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if (InWhitespace() && !InGroup())
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Operands.push_back(
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AsmWriterOperand(
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"O.PadToColumn(TAI->getOperandColumn(OperandColumn++));\n",
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AsmWriterOperand::isLiteralStatementOperand));
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ReadingWhitespace = false;
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++GroupLevel;
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assert(GroupLevel < MAX_GROUP_NESTING_LEVEL
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&& "Exceeded maximum operand group nesting level");
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GroupDelim[GroupLevel] = AsmString[LastEmitted];
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AddLiteralString(std::string(1, AsmString[LastEmitted]));
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break;
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case ')': // Fallthrough
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case ']':
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if (InWhitespace() && !InGroup())
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Operands.push_back(
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AsmWriterOperand(
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"O.PadToColumn(TAI->getOperandColumn(OperandColumn++));\n",
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AsmWriterOperand::isLiteralStatementOperand));
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ReadingWhitespace = false;
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if (AsmString[LastEmitted] == ')')
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assert(GroupDelim[GroupLevel] == '(' && "Mismatched delimeters");
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else
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assert(GroupDelim[GroupLevel] == '[' && "Mismatched delimeters");
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--GroupLevel;
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assert(GroupLevel > -2 && "Too many end delimeters!");
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AddLiteralString(std::string(1, AsmString[LastEmitted]));
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break;
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default:
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if (AsmString[LastEmitted] != ' ' &&
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AsmString[LastEmitted] != '\t') {
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if (!InGroup() && InWhitespace())
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Operands.push_back(
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AsmWriterOperand(
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"O.PadToColumn(TAI->getOperandColumn(OperandColumn++));\n",
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AsmWriterOperand::isLiteralStatementOperand));
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ReadingWhitespace = false;
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}
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else
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if (!InGroup())
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ReadingWhitespace = true;
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AddLiteralString(std::string(1, AsmString[LastEmitted]));
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break;
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}
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@ -249,11 +269,33 @@ AsmWriterInst::AsmWriterInst(const CodeGenInstruction &CGI, unsigned Variant)
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if (DollarPos+1 != AsmString.size() &&
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(CurVariant == Variant || CurVariant == ~0U)) {
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if (AsmString[DollarPos+1] == 'n') {
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assert(!InGroup() && "Missing matching group delimeter");
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ReadingWhitespace = false;
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AddLiteralString("\\n");
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} else if (AsmString[DollarPos+1] == 't') {
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if (!InGroup()) {
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ReadingWhitespace = true;
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}
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AddLiteralString("\\t");
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} else if (std::string("${|}\\").find(AsmString[DollarPos+1])
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!= std::string::npos) {
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if (InWhitespace() && !InGroup())
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Operands.push_back(
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AsmWriterOperand(
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"O.PadToColumn(TAI->getOperandColumn(OperandColumn++));\n",
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AsmWriterOperand::isLiteralStatementOperand));
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ReadingWhitespace = false;
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if (AsmString[DollarPos+1] == '{') {
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++GroupLevel;
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assert(GroupLevel < MAX_GROUP_NESTING_LEVEL
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&& "Exceeded maximum operand group nesting level");
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GroupDelim[GroupLevel] = AsmString[DollarPos+1];
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} else if (AsmString[DollarPos+1] == '}') {
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assert(GroupDelim[GroupLevel] == '{' && "Mismatched delimeters");
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--GroupLevel;
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assert(GroupLevel > -2 && "Too many end delimeters!");
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}
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AddLiteralString(std::string(1, AsmString[DollarPos+1]));
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} else {
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throw "Non-supported escaped character found in instruction '" +
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@ -282,10 +324,24 @@ AsmWriterInst::AsmWriterInst(const CodeGenInstruction &CGI, unsigned Variant)
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CurVariant = ~0U;
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} else if (DollarPos+1 != AsmString.size() &&
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AsmString[DollarPos+1] == '$') {
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if (CurVariant == Variant || CurVariant == ~0U)
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if (CurVariant == Variant || CurVariant == ~0U) {
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if (InWhitespace() && !InGroup())
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Operands.push_back(
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AsmWriterOperand(
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"O.PadToColumn(TAI->getOperandColumn(OperandColumn++));\n",
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AsmWriterOperand::isLiteralStatementOperand));
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ReadingWhitespace = false;
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AddLiteralString("$"); // "$$" -> $
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}
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LastEmitted = DollarPos+2;
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} else {
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if (InWhitespace() && !InGroup())
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Operands.push_back(
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AsmWriterOperand(
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"O.PadToColumn(TAI->getOperandColumn(OperandColumn++));\n",
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AsmWriterOperand::isLiteralStatementOperand));
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ReadingWhitespace = false;
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// Get the name of the variable.
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std::string::size_type VarEnd = DollarPos+1;
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@ -791,15 +847,27 @@ void AsmWriterEmitter::run(raw_ostream &O) {
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O << " // Emit the opcode for the instruction.\n"
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<< " unsigned Bits = OpInfo[MI->getOpcode()];\n"
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<< " if (Bits == 0) return false;\n\n";
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O << " std::string OpStr(AsmStrs+(Bits & " << (1 << AsmStrBits)-1 << "));\n"
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<< " unsigned OperandColumn = 1;\n"
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<< " O << OpStr;\n\n";
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O << " if (OpStr.find_last_of(\" \\t\") == OpStr.size()-1) {\n"
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<< " O.PadToColumn(TAI->getOperandColumn(1));\n"
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<< " OperandColumn = 2;\n"
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O << " unsigned OperandColumn = 1;\n\n"
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<< " if (TAI->getOperandColumn(1) > 0) {\n"
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<< " // Don't emit trailing whitespace, let the column padding do it. This\n"
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<< " // guarantees that a stray long opcode + tab won't upset the alignment.\n"
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<< " unsigned OpLength = std::strlen(AsmStrs+(Bits & " << (1 << AsmStrBits)-1 << "));\n"
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<< " if (OpLength > 0 &&\n"
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<< " ((AsmStrs+(Bits & " << (1 << AsmStrBits)-1 << "))[OpLength-1] == ' ' ||\n"
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<< " (AsmStrs+(Bits & " << (1 << AsmStrBits)-1 << "))[OpLength-1] == '\\t')) {\n"
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<< " do {\n"
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<< " --OpLength;\n"
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<< " } while ((AsmStrs+(Bits & " << (1 << AsmStrBits)-1 << "))[OpLength-1] == ' ' ||\n"
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<< " (AsmStrs+(Bits & " << (1 << AsmStrBits)-1 << "))[OpLength-1] == '\\t');\n"
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<< " for (unsigned Idx = 0; Idx < OpLength; ++Idx)\n"
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<< " O << (AsmStrs+(Bits & " << (1 << AsmStrBits)-1 << "))[Idx];\n"
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<< " O.PadToColumn(TAI->getOperandColumn(OperandColumn++), 1);\n"
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<< " }\n"
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<< " } else {\n"
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<< " O << AsmStrs+(Bits & " << (1 << AsmStrBits)-1 << ");\n"
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<< " }\n\n";
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// Output the table driven operand information.
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BitsLeft = 32-AsmStrBits;
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